1" Test various aspects of the Vim script language.
2" Most of this was formerly in test49.
3
4source check.vim
5source shared.vim
6
7"-------------------------------------------------------------------------------
8" Test environment							    {{{1
9"-------------------------------------------------------------------------------
10
11com!		   XpathINIT  let g:Xpath = ''
12com! -nargs=1 -bar Xpath      let g:Xpath = g:Xpath . <args>
13
14" Append a message to the "messages" file
15func Xout(text)
16    split messages
17    $put =a:text
18    wq
19endfunc
20
21com! -nargs=1	     Xout     call Xout(<args>)
22
23" MakeScript() - Make a script file from a function.			    {{{2
24"
25" Create a script that consists of the body of the function a:funcname.
26" Replace any ":return" by a ":finish", any argument variable by a global
27" variable, and every ":call" by a ":source" for the next following argument
28" in the variable argument list.  This function is useful if similar tests are
29" to be made for a ":return" from a function call or a ":finish" in a script
30" file.
31func MakeScript(funcname, ...)
32    let script = tempname()
33    execute "redir! >" . script
34    execute "function" a:funcname
35    redir END
36    execute "edit" script
37    " Delete the "function" and the "endfunction" lines.  Do not include the
38    " word "function" in the pattern since it might be translated if LANG is
39    " set.  When MakeScript() is being debugged, this deletes also the debugging
40    " output of its line 3 and 4.
41    exec '1,/.*' . a:funcname . '(.*)/d'
42    /^\d*\s*endfunction\>/,$d
43    %s/^\d*//e
44    %s/return/finish/e
45    %s/\<a:\(\h\w*\)/g:\1/ge
46    normal gg0
47    let cnt = 0
48    while search('\<call\s*\%(\u\|s:\)\w*\s*(.*)', 'W') > 0
49	let cnt = cnt + 1
50	s/\<call\s*\%(\u\|s:\)\w*\s*(.*)/\='source ' . a:{cnt}/
51    endwhile
52    g/^\s*$/d
53    write
54    bwipeout
55    return script
56endfunc
57
58" ExecAsScript - Source a temporary script made from a function.	    {{{2
59"
60" Make a temporary script file from the function a:funcname, ":source" it, and
61" delete it afterwards.  However, if an exception is thrown the file may remain,
62" the caller should call DeleteTheScript() afterwards.
63let s:script_name = ''
64function! ExecAsScript(funcname)
65    " Make a script from the function passed as argument.
66    let s:script_name = MakeScript(a:funcname)
67
68    " Source and delete the script.
69    exec "source" s:script_name
70    call delete(s:script_name)
71    let s:script_name = ''
72endfunction
73
74function! DeleteTheScript()
75    if s:script_name
76	call delete(s:script_name)
77	let s:script_name = ''
78    endif
79endfunc
80
81com! -nargs=1 -bar ExecAsScript call ExecAsScript(<f-args>)
82
83
84"-------------------------------------------------------------------------------
85" Test 1:   :endwhile in function					    {{{1
86"
87"	    Detect if a broken loop is (incorrectly) reactivated by the
88"	    :endwhile.  Use a :return to prevent an endless loop, and make
89"	    this test first to get a meaningful result on an error before other
90"	    tests will hang.
91"-------------------------------------------------------------------------------
92
93function! T1_F()
94    Xpath 'a'
95    let first = 1
96    while 1
97	Xpath 'b'
98	if first
99	    Xpath 'c'
100	    let first = 0
101	    break
102	else
103	    Xpath 'd'
104	    return
105	endif
106    endwhile
107endfunction
108
109function! T1_G()
110    Xpath 'h'
111    let first = 1
112    while 1
113	Xpath 'i'
114	if first
115	    Xpath 'j'
116	    let first = 0
117	    break
118	else
119	    Xpath 'k'
120	    return
121	endif
122	if 1	" unmatched :if
123    endwhile
124endfunction
125
126func Test_endwhile_function()
127  XpathINIT
128  call T1_F()
129  Xpath 'F'
130
131  try
132    call T1_G()
133  catch
134    " Catch missing :endif
135    call assert_true(v:exception =~ 'E171')
136    Xpath 'x'
137  endtry
138  Xpath 'G'
139
140  call assert_equal('abcFhijxG', g:Xpath)
141endfunc
142
143"-------------------------------------------------------------------------------
144" Test 2:   :endwhile in script						    {{{1
145"
146"	    Detect if a broken loop is (incorrectly) reactivated by the
147"	    :endwhile.  Use a :finish to prevent an endless loop, and place
148"	    this test before others that might hang to get a meaningful result
149"	    on an error.
150"
151"	    This test executes the bodies of the functions T1_F and T1_G from
152"	    the previous test as script files (:return replaced by :finish).
153"-------------------------------------------------------------------------------
154
155func Test_endwhile_script()
156  XpathINIT
157  ExecAsScript T1_F
158  Xpath 'F'
159  call DeleteTheScript()
160
161  try
162    ExecAsScript T1_G
163  catch
164    " Catch missing :endif
165    call assert_true(v:exception =~ 'E171')
166    Xpath 'x'
167  endtry
168  Xpath 'G'
169  call DeleteTheScript()
170
171  call assert_equal('abcFhijxG', g:Xpath)
172endfunc
173
174"-------------------------------------------------------------------------------
175" Test 3:   :if, :elseif, :while, :continue, :break			    {{{1
176"-------------------------------------------------------------------------------
177
178function Test_if_while()
179    XpathINIT
180    if 1
181	Xpath 'a'
182	let loops = 3
183	while loops > -1	    " main loop: loops == 3, 2, 1 (which breaks)
184	    if loops <= 0
185		let break_err = 1
186		let loops = -1
187	    else
188		Xpath 'b' . loops
189	    endif
190	    if (loops == 2)
191		while loops == 2 " dummy loop
192		    Xpath 'c' . loops
193		    let loops = loops - 1
194		    continue    " stop dummy loop
195		    Xpath 'd' . loops
196		endwhile
197		continue	    " continue main loop
198		Xpath 'e' . loops
199	    elseif (loops == 1)
200		let p = 1
201		while p	    " dummy loop
202		    Xpath 'f' . loops
203		    let p = 0
204		    break	    " break dummy loop
205		    Xpath 'g' . loops
206		endwhile
207		Xpath 'h' . loops
208		unlet p
209		break	    " break main loop
210		Xpath 'i' . loops
211	    endif
212	    if (loops > 0)
213		Xpath 'j' . loops
214	    endif
215	    while loops == 3    " dummy loop
216		let loops = loops - 1
217	    endwhile	    " end dummy loop
218	endwhile		    " end main loop
219	Xpath 'k'
220    else
221	Xpath 'l'
222    endif
223    Xpath 'm'
224    if exists("break_err")
225	Xpath 'm'
226	unlet break_err
227    endif
228
229    unlet loops
230
231    call assert_equal('ab3j3b2c2b1f1h1km', g:Xpath)
232endfunc
233
234"-------------------------------------------------------------------------------
235" Test 4:   :return							    {{{1
236"-------------------------------------------------------------------------------
237
238function! T4_F()
239    if 1
240	Xpath 'a'
241	let loops = 3
242	while loops > 0				"    3:  2:     1:
243	    Xpath 'b' . loops
244	    if (loops == 2)
245		Xpath 'c' . loops
246		return
247		Xpath 'd' . loops
248	    endif
249	    Xpath 'e' . loops
250	    let loops = loops - 1
251	endwhile
252	Xpath 'f'
253    else
254	Xpath 'g'
255    endif
256endfunction
257
258function Test_return()
259    XpathINIT
260    call T4_F()
261    Xpath '4'
262
263    call assert_equal('ab3e3b2c24', g:Xpath)
264endfunction
265
266
267"-------------------------------------------------------------------------------
268" Test 5:   :finish							    {{{1
269"
270"	    This test executes the body of the function T4_F from the previous
271"	    test as a script file (:return replaced by :finish).
272"-------------------------------------------------------------------------------
273
274function Test_finish()
275    XpathINIT
276    ExecAsScript T4_F
277    Xpath '5'
278    call DeleteTheScript()
279
280    call assert_equal('ab3e3b2c25', g:Xpath)
281endfunction
282
283
284
285"-------------------------------------------------------------------------------
286" Test 6:   Defining functions in :while loops				    {{{1
287"
288"	     Functions can be defined inside other functions.  An inner function
289"	     gets defined when the outer function is executed.  Functions may
290"	     also be defined inside while loops.  Expressions in braces for
291"	     defining the function name are allowed.
292"
293"	     The functions are defined when sourcing the script, only the
294"	     resulting path is checked in the test function.
295"-------------------------------------------------------------------------------
296
297XpathINIT
298
299" The command CALL collects the argument of all its invocations in "calls"
300" when used from a function (that is, when the global variable "calls" needs
301" the "g:" prefix).  This is to check that the function code is skipped when
302" the function is defined.  For inner functions, do so only if the outer
303" function is not being executed.
304"
305let calls = ""
306com! -nargs=1 CALL
307	    \ if !exists("calls") && !exists("outer") |
308	    \ let g:calls = g:calls . <args> |
309	    \ endif
310
311let i = 0
312while i < 3
313    let i = i + 1
314    if i == 1
315	Xpath 'a'
316	function! F1(arg)
317	    CALL a:arg
318	    let outer = 1
319
320	    let j = 0
321	    while j < 1
322		Xpath 'b'
323		let j = j + 1
324		function! G1(arg)
325		    CALL a:arg
326		endfunction
327		Xpath 'c'
328	    endwhile
329	endfunction
330	Xpath 'd'
331
332	continue
333    endif
334
335    Xpath 'e' . i
336    function! F{i}(i, arg)
337	CALL a:arg
338	let outer = 1
339
340	if a:i == 3
341	    Xpath 'f'
342	endif
343	let k = 0
344	while k < 3
345	    Xpath 'g' . k
346	    let k = k + 1
347	    function! G{a:i}{k}(arg)
348		CALL a:arg
349	    endfunction
350	    Xpath 'h' . k
351	endwhile
352    endfunction
353    Xpath 'i'
354
355endwhile
356
357if exists("*G1")
358    Xpath 'j'
359endif
360if exists("*F1")
361    call F1("F1")
362    if exists("*G1")
363       call G1("G1")
364    endif
365endif
366
367if exists("G21") || exists("G22") || exists("G23")
368    Xpath 'k'
369endif
370if exists("*F2")
371    call F2(2, "F2")
372    if exists("*G21")
373       call G21("G21")
374    endif
375    if exists("*G22")
376       call G22("G22")
377    endif
378    if exists("*G23")
379       call G23("G23")
380    endif
381endif
382
383if exists("G31") || exists("G32") || exists("G33")
384    Xpath 'l'
385endif
386if exists("*F3")
387    call F3(3, "F3")
388    if exists("*G31")
389       call G31("G31")
390    endif
391    if exists("*G32")
392       call G32("G32")
393    endif
394    if exists("*G33")
395       call G33("G33")
396    endif
397endif
398
399Xpath 'm'
400
401let g:test6_result = g:Xpath
402let g:test6_calls = calls
403
404unlet calls
405delfunction F1
406delfunction G1
407delfunction F2
408delfunction G21
409delfunction G22
410delfunction G23
411delfunction G31
412delfunction G32
413delfunction G33
414
415function Test_defining_functions()
416    call assert_equal('ade2ie3ibcg0h1g1h2g2h3fg0h1g1h2g2h3m', g:test6_result)
417    call assert_equal('F1G1F2G21G22G23F3G31G32G33', g:test6_calls)
418endfunc
419
420"-------------------------------------------------------------------------------
421" Test 7:   Continuing on errors outside functions			    {{{1
422"
423"	    On an error outside a function, the script processing continues
424"	    at the line following the outermost :endif or :endwhile.  When not
425"	    inside an :if or :while, the script processing continues at the next
426"	    line.
427"-------------------------------------------------------------------------------
428
429XpathINIT
430
431if 1
432    Xpath 'a'
433    while 1
434	Xpath 'b'
435	asdf
436	Xpath 'c'
437	break
438    endwhile | Xpath 'd'
439    Xpath 'e'
440endif | Xpath 'f'
441Xpath 'g'
442
443while 1
444    Xpath 'h'
445    if 1
446	Xpath 'i'
447	asdf
448	Xpath 'j'
449    endif | Xpath 'k'
450    Xpath 'l'
451    break
452endwhile | Xpath 'm'
453Xpath 'n'
454
455asdf
456Xpath 'o'
457
458asdf | Xpath 'p'
459Xpath 'q'
460
461let g:test7_result = g:Xpath
462
463func Test_error_in_script()
464    call assert_equal('abghinoq', g:test7_result)
465endfunc
466
467"-------------------------------------------------------------------------------
468" Test 8:   Aborting and continuing on errors inside functions		    {{{1
469"
470"	    On an error inside a function without the "abort" attribute, the
471"	    script processing continues at the next line (unless the error was
472"	    in a :return command).  On an error inside a function with the
473"	    "abort" attribute, the function is aborted and the script processing
474"	    continues after the function call; the value -1 is returned then.
475"-------------------------------------------------------------------------------
476
477XpathINIT
478
479function! T8_F()
480    if 1
481	Xpath 'a'
482	while 1
483	    Xpath 'b'
484	    asdf
485	    Xpath 'c'
486	    asdf | Xpath 'd'
487	    Xpath 'e'
488	    break
489	endwhile
490	Xpath 'f'
491    endif | Xpath 'g'
492    Xpath 'h'
493
494    while 1
495	Xpath 'i'
496	if 1
497	    Xpath 'j'
498	    asdf
499	    Xpath 'k'
500	    asdf | Xpath 'l'
501	    Xpath 'm'
502	endif
503	Xpath 'n'
504	break
505    endwhile | Xpath 'o'
506    Xpath 'p'
507
508    return novar		" returns (default return value 0)
509    Xpath 'q'
510    return 1			" not reached
511endfunction
512
513function! T8_G() abort
514    if 1
515	Xpath 'r'
516	while 1
517	    Xpath 's'
518	    asdf		" returns -1
519	    Xpath 't'
520	    break
521	endwhile
522	Xpath 'v'
523    endif | Xpath 'w'
524    Xpath 'x'
525
526    return -4			" not reached
527endfunction
528
529function! T8_H() abort
530    while 1
531	Xpath 'A'
532	if 1
533	    Xpath 'B'
534	    asdf		" returns -1
535	    Xpath 'C'
536	endif
537	Xpath 'D'
538	break
539    endwhile | Xpath 'E'
540    Xpath 'F'
541
542    return -4			" not reached
543endfunction
544
545" Aborted functions (T8_G and T8_H) return -1.
546let g:test8_sum = (T8_F() + 1) - 4 * T8_G() - 8 * T8_H()
547Xpath 'X'
548let g:test8_result = g:Xpath
549
550func Test_error_in_function()
551    call assert_equal(13, g:test8_sum)
552    call assert_equal('abcefghijkmnoprsABX', g:test8_result)
553
554    delfunction T8_F
555    delfunction T8_G
556    delfunction T8_H
557endfunc
558
559
560"-------------------------------------------------------------------------------
561" Test 9:   Continuing after aborted functions				    {{{1
562"
563"	    When a function with the "abort" attribute is aborted due to an
564"	    error, the next function back in the call hierarchy without an
565"	    "abort" attribute continues; the value -1 is returned then.
566"-------------------------------------------------------------------------------
567
568XpathINIT
569
570function! F() abort
571    Xpath 'a'
572    let result = G()	" not aborted
573    Xpath 'b'
574    if result != 2
575	Xpath 'c'
576    endif
577    return 1
578endfunction
579
580function! G()		" no abort attribute
581    Xpath 'd'
582    if H() != -1	" aborted
583	Xpath 'e'
584    endif
585    Xpath 'f'
586    return 2
587endfunction
588
589function! H() abort
590    Xpath 'g'
591    call I()		" aborted
592    Xpath 'h'
593    return 4
594endfunction
595
596function! I() abort
597    Xpath 'i'
598    asdf		" error
599    Xpath 'j'
600    return 8
601endfunction
602
603if F() != 1
604    Xpath 'k'
605endif
606
607let g:test9_result = g:Xpath
608
609delfunction F
610delfunction G
611delfunction H
612delfunction I
613
614func Test_func_abort()
615    call assert_equal('adgifb', g:test9_result)
616endfunc
617
618
619"-------------------------------------------------------------------------------
620" Test 10:  :if, :elseif, :while argument parsing			    {{{1
621"
622"	    A '"' or '|' in an argument expression must not be mixed up with
623"	    a comment or a next command after a bar.  Parsing errors should
624"	    be recognized.
625"-------------------------------------------------------------------------------
626
627XpathINIT
628
629function! MSG(enr, emsg)
630    let english = v:lang == "C" || v:lang =~ '^[Ee]n'
631    if a:enr == ""
632	Xout "TODO: Add message number for:" a:emsg
633	let v:errmsg = ":" . v:errmsg
634    endif
635    let match = 1
636    if v:errmsg !~ '^'.a:enr.':' || (english && v:errmsg !~ a:emsg)
637	let match = 0
638	if v:errmsg == ""
639	    Xout "Message missing."
640	else
641	    let v:errmsg = v:errmsg->escape('"')
642	    Xout "Unexpected message:" v:errmsg
643	endif
644    endif
645    return match
646endfunc
647
648if 1 || strlen("\"") | Xpath 'a'
649    Xpath 'b'
650endif
651Xpath 'c'
652
653if 0
654elseif 1 || strlen("\"") | Xpath 'd'
655    Xpath 'e'
656endif
657Xpath 'f'
658
659while 1 || strlen("\"") | Xpath 'g'
660    Xpath 'h'
661    break
662endwhile
663Xpath 'i'
664
665let v:errmsg = ""
666if 1 ||| strlen("\"") | Xpath 'j'
667    Xpath 'k'
668endif
669Xpath 'l'
670if !MSG('E15', "Invalid expression")
671    Xpath 'm'
672endif
673
674let v:errmsg = ""
675if 0
676elseif 1 ||| strlen("\"") | Xpath 'n'
677    Xpath 'o'
678endif
679Xpath 'p'
680if !MSG('E15', "Invalid expression")
681    Xpath 'q'
682endif
683
684let v:errmsg = ""
685while 1 ||| strlen("\"") | Xpath 'r'
686    Xpath 's'
687    break
688endwhile
689Xpath 't'
690if !MSG('E15', "Invalid expression")
691    Xpath 'u'
692endif
693
694let g:test10_result = g:Xpath
695delfunction MSG
696
697func Test_expr_parsing()
698    call assert_equal('abcdefghilpt', g:test10_result)
699endfunc
700
701
702"-------------------------------------------------------------------------------
703" Test 11:  :if, :elseif, :while argument evaluation after abort	    {{{1
704"
705"	    When code is skipped over due to an error, the boolean argument to
706"	    an :if, :elseif, or :while must not be evaluated.
707"-------------------------------------------------------------------------------
708
709XpathINIT
710
711let calls = 0
712
713function! P(num)
714    let g:calls = g:calls + a:num   " side effect on call
715    return 0
716endfunction
717
718if 1
719    Xpath 'a'
720    asdf		" error
721    Xpath 'b'
722    if P(1)		" should not be called
723	Xpath 'c'
724    elseif !P(2)	" should not be called
725	Xpath 'd'
726    else
727	Xpath 'e'
728    endif
729    Xpath 'f'
730    while P(4)		" should not be called
731	Xpath 'g'
732    endwhile
733    Xpath 'h'
734endif
735Xpath 'x'
736
737let g:test11_calls = calls
738let g:test11_result = g:Xpath
739
740unlet calls
741delfunction P
742
743func Test_arg_abort()
744    call assert_equal(0, g:test11_calls)
745    call assert_equal('ax', g:test11_result)
746endfunc
747
748
749"-------------------------------------------------------------------------------
750" Test 12:  Expressions in braces in skipped code			    {{{1
751"
752"	    In code skipped over due to an error or inactive conditional,
753"	    an expression in braces as part of a variable or function name
754"	    should not be evaluated.
755"-------------------------------------------------------------------------------
756
757XpathINIT
758
759function! NULL()
760    Xpath 'a'
761    return 0
762endfunction
763
764function! ZERO()
765    Xpath 'b'
766    return 0
767endfunction
768
769function! F0()
770    Xpath 'c'
771endfunction
772
773function! F1(arg)
774    Xpath 'e'
775endfunction
776
777let V0 = 1
778
779Xpath 'f'
780echo 0 ? F{NULL() + V{ZERO()}}() : 1
781
782Xpath 'g'
783if 0
784    Xpath 'h'
785    call F{NULL() + V{ZERO()}}()
786endif
787
788Xpath 'i'
789if 1
790    asdf		" error
791    Xpath 'j'
792    call F1(F{NULL() + V{ZERO()}}())
793endif
794
795Xpath 'k'
796if 1
797    asdf		" error
798    Xpath 'l'
799    call F{NULL() + V{ZERO()}}()
800endif
801
802let g:test12_result = g:Xpath
803
804func Test_braces_skipped()
805    call assert_equal('fgik', g:test12_result)
806endfunc
807
808
809"-------------------------------------------------------------------------------
810" Test 13:  Failure in argument evaluation for :while			    {{{1
811"
812"	    A failure in the expression evaluation for the condition of a :while
813"	    causes the whole :while loop until the matching :endwhile being
814"	    ignored.  Continuation is at the next following line.
815"-------------------------------------------------------------------------------
816
817XpathINIT
818
819Xpath 'a'
820while asdf
821    Xpath 'b'
822    while 1
823	Xpath 'c'
824	break
825    endwhile
826    Xpath 'd'
827    break
828endwhile
829Xpath 'e'
830
831while asdf | Xpath 'f' | endwhile | Xpath 'g'
832Xpath 'h'
833let g:test13_result = g:Xpath
834
835func Test_while_fail()
836    call assert_equal('aeh', g:test13_result)
837endfunc
838
839
840"-------------------------------------------------------------------------------
841" Test 14:  Failure in argument evaluation for :if			    {{{1
842"
843"	    A failure in the expression evaluation for the condition of an :if
844"	    does not cause the corresponding :else or :endif being matched to
845"	    a previous :if/:elseif.  Neither of both branches of the failed :if
846"	    are executed.
847"-------------------------------------------------------------------------------
848
849XpathINIT
850
851function! F()
852    Xpath 'a'
853    let x = 0
854    if x		" false
855	Xpath 'b'
856    elseif !x		" always true
857	Xpath 'c'
858	let x = 1
859	if g:boolvar	" possibly undefined
860	    Xpath 'd'
861	else
862	    Xpath 'e'
863	endif
864	Xpath 'f'
865    elseif x		" never executed
866	Xpath 'g'
867    endif
868    Xpath 'h'
869endfunction
870
871let boolvar = 1
872call F()
873Xpath '-'
874
875unlet boolvar
876call F()
877let g:test14_result = g:Xpath
878
879delfunction F
880
881func Test_if_fail()
882    call assert_equal('acdfh-acfh', g:test14_result)
883endfunc
884
885
886"-------------------------------------------------------------------------------
887" Test 15:  Failure in argument evaluation for :if (bar)		    {{{1
888"
889"	    Like previous test, except that the failing :if ... | ... | :endif
890"	    is in a single line.
891"-------------------------------------------------------------------------------
892
893XpathINIT
894
895function! F()
896    Xpath 'a'
897    let x = 0
898    if x		" false
899	Xpath 'b'
900    elseif !x		" always true
901	Xpath 'c'
902	let x = 1
903	if g:boolvar | Xpath 'd' | else | Xpath 'e' | endif
904	Xpath 'f'
905    elseif x		" never executed
906	Xpath 'g'
907    endif
908    Xpath 'h'
909endfunction
910
911let boolvar = 1
912call F()
913Xpath '-'
914
915unlet boolvar
916call F()
917let g:test15_result = g:Xpath
918
919delfunction F
920
921func Test_if_bar_fail()
922    call assert_equal('acdfh-acfh', g:test15_result)
923endfunc
924
925"-------------------------------------------------------------------------------
926" Test 16:  Double :else or :elseif after :else				    {{{1
927"
928"	    Multiple :elses or an :elseif after an :else are forbidden.
929"-------------------------------------------------------------------------------
930
931func T16_F() abort
932  if 0
933    Xpath 'a'
934  else
935    Xpath 'b'
936  else		" aborts function
937    Xpath 'c'
938  endif
939  Xpath 'd'
940endfunc
941
942func T16_G() abort
943  if 0
944    Xpath 'a'
945  else
946    Xpath 'b'
947  elseif 1		" aborts function
948    Xpath 'c'
949  else
950    Xpath 'd'
951  endif
952  Xpath 'e'
953endfunc
954
955func T16_H() abort
956  if 0
957    Xpath 'a'
958  elseif 0
959    Xpath 'b'
960  else
961    Xpath 'c'
962  else		" aborts function
963    Xpath 'd'
964  endif
965  Xpath 'e'
966endfunc
967
968func T16_I() abort
969  if 0
970    Xpath 'a'
971  elseif 0
972    Xpath 'b'
973  else
974    Xpath 'c'
975  elseif 1		" aborts function
976    Xpath 'd'
977  else
978    Xpath 'e'
979  endif
980  Xpath 'f'
981endfunc
982
983func Test_Multi_Else()
984  XpathINIT
985  try
986    call T16_F()
987  catch /E583:/
988    Xpath 'e'
989  endtry
990  call assert_equal('be', g:Xpath)
991
992  XpathINIT
993  try
994    call T16_G()
995  catch /E584:/
996    Xpath 'f'
997  endtry
998  call assert_equal('bf', g:Xpath)
999
1000  XpathINIT
1001  try
1002    call T16_H()
1003  catch /E583:/
1004    Xpath 'f'
1005  endtry
1006  call assert_equal('cf', g:Xpath)
1007
1008  XpathINIT
1009  try
1010    call T16_I()
1011  catch /E584:/
1012    Xpath 'g'
1013  endtry
1014  call assert_equal('cg', g:Xpath)
1015endfunc
1016
1017"-------------------------------------------------------------------------------
1018" Test 17:  Nesting of unmatched :if or :endif inside a :while		    {{{1
1019"
1020"	    The :while/:endwhile takes precedence in nesting over an unclosed
1021"	    :if or an unopened :endif.
1022"-------------------------------------------------------------------------------
1023
1024" While loops inside a function are continued on error.
1025func T17_F()
1026  let loops = 3
1027  while loops > 0
1028    let loops -= 1
1029    Xpath 'a' . loops
1030    if (loops == 1)
1031      Xpath 'b' . loops
1032      continue
1033    elseif (loops == 0)
1034      Xpath 'c' . loops
1035      break
1036    elseif 1
1037      Xpath 'd' . loops
1038    " endif missing!
1039  endwhile	" :endwhile after :if 1
1040  Xpath 'e'
1041endfunc
1042
1043func T17_G()
1044  let loops = 2
1045  while loops > 0
1046    let loops -= 1
1047    Xpath 'a' . loops
1048    if 0
1049      Xpath 'b' . loops
1050    " endif missing
1051  endwhile	" :endwhile after :if 0
1052endfunc
1053
1054func T17_H()
1055  let loops = 2
1056  while loops > 0
1057    let loops -= 1
1058    Xpath 'a' . loops
1059    " if missing!
1060    endif	" :endif without :if in while
1061    Xpath 'b' . loops
1062  endwhile
1063endfunc
1064
1065" Error continuation outside a function is at the outermost :endwhile or :endif.
1066XpathINIT
1067let v:errmsg = ''
1068let loops = 2
1069while loops > 0
1070    let loops -= 1
1071    Xpath 'a' . loops
1072    if 0
1073	Xpath 'b' . loops
1074    " endif missing! Following :endwhile fails.
1075endwhile | Xpath 'c'
1076Xpath 'd'
1077call assert_match('E171:', v:errmsg)
1078call assert_equal('a1d', g:Xpath)
1079
1080func Test_unmatched_if_in_while()
1081  XpathINIT
1082  call assert_fails('call T17_F()', 'E171:')
1083  call assert_equal('a2d2a1b1a0c0e', g:Xpath)
1084
1085  XpathINIT
1086  call assert_fails('call T17_G()', 'E171:')
1087  call assert_equal('a1a0', g:Xpath)
1088
1089  XpathINIT
1090  call assert_fails('call T17_H()', 'E580:')
1091  call assert_equal('a1b1a0b0', g:Xpath)
1092endfunc
1093
1094"-------------------------------------------------------------------------------
1095"-------------------------------------------------------------------------------
1096"-------------------------------------------------------------------------------
1097" Test 87   using (expr) ? funcref : funcref				    {{{1
1098"
1099"	    Vim needs to correctly parse the funcref and even when it does
1100"	    not execute the funcref, it needs to consume the trailing ()
1101"-------------------------------------------------------------------------------
1102
1103func Add2(x1, x2)
1104  return a:x1 + a:x2
1105endfu
1106
1107func GetStr()
1108  return "abcdefghijklmnopqrstuvwxyp"
1109endfu
1110
1111func Test_funcref_with_condexpr()
1112  call assert_equal(5, function('Add2')(2,3))
1113
1114  call assert_equal(3, 1 ? function('Add2')(1,2) : function('Add2')(2,3))
1115  call assert_equal(5, 0 ? function('Add2')(1,2) : function('Add2')(2,3))
1116  " Make sure, GetStr() still works.
1117  call assert_equal('abcdefghijk', GetStr()[0:10])
1118endfunc
1119
1120" Test 90:  Recognizing {} in variable name.			    {{{1
1121"-------------------------------------------------------------------------------
1122
1123func Test_curlies()
1124    let s:var = 66
1125    let ns = 's'
1126    call assert_equal(66, {ns}:var)
1127
1128    let g:a = {}
1129    let g:b = 't'
1130    let g:a[g:b] = 77
1131    call assert_equal(77, g:a['t'])
1132endfunc
1133
1134"-------------------------------------------------------------------------------
1135" Test 91:  using type().					    {{{1
1136"-------------------------------------------------------------------------------
1137
1138func Test_type()
1139    call assert_equal(0, type(0))
1140    call assert_equal(1, type(""))
1141    call assert_equal(2, type(function("tr")))
1142    call assert_equal(2, type(function("tr", [8])))
1143    call assert_equal(3, type([]))
1144    call assert_equal(4, type({}))
1145    if has('float')
1146      call assert_equal(5, type(0.0))
1147    endif
1148    call assert_equal(6, type(v:false))
1149    call assert_equal(6, type(v:true))
1150    call assert_equal(7, type(v:none))
1151    call assert_equal(7, type(v:null))
1152    call assert_equal(8, v:t_job)
1153    call assert_equal(9, v:t_channel)
1154    call assert_equal(v:t_number, type(0))
1155    call assert_equal(v:t_string, type(""))
1156    call assert_equal(v:t_func, type(function("tr")))
1157    call assert_equal(v:t_func, type(function("tr", [8])))
1158    call assert_equal(v:t_list, type([]))
1159    call assert_equal(v:t_dict, type({}))
1160    if has('float')
1161      call assert_equal(v:t_float, type(0.0))
1162    endif
1163    call assert_equal(v:t_bool, type(v:false))
1164    call assert_equal(v:t_bool, type(v:true))
1165    call assert_equal(v:t_none, type(v:none))
1166    call assert_equal(v:t_none, type(v:null))
1167
1168
1169    call assert_equal(0, 0 + v:false)
1170    call assert_equal(1, 0 + v:true)
1171    call assert_equal(0, 0 + v:none)
1172    call assert_equal(0, 0 + v:null)
1173
1174    call assert_equal('v:false', '' . v:false)
1175    call assert_equal('v:true', '' . v:true)
1176    call assert_equal('v:none', '' . v:none)
1177    call assert_equal('v:null', '' . v:null)
1178
1179    call assert_true(v:false == 0)
1180    call assert_false(v:false != 0)
1181    call assert_true(v:true == 1)
1182    call assert_false(v:true != 1)
1183    call assert_false(v:true == v:false)
1184    call assert_true(v:true != v:false)
1185
1186    call assert_true(v:null == 0)
1187    call assert_false(v:null != 0)
1188    call assert_true(v:none == 0)
1189    call assert_false(v:none != 0)
1190
1191    call assert_true(v:false is v:false)
1192    call assert_true(v:true is v:true)
1193    call assert_true(v:none is v:none)
1194    call assert_true(v:null is v:null)
1195
1196    call assert_false(v:false isnot v:false)
1197    call assert_false(v:true isnot v:true)
1198    call assert_false(v:none isnot v:none)
1199    call assert_false(v:null isnot v:null)
1200
1201    call assert_false(v:false is 0)
1202    call assert_false(v:true is 1)
1203    call assert_false(v:true is v:false)
1204    call assert_false(v:none is 0)
1205    call assert_false(v:null is 0)
1206    call assert_false(v:null is v:none)
1207
1208    call assert_true(v:false isnot 0)
1209    call assert_true(v:true isnot 1)
1210    call assert_true(v:true isnot v:false)
1211    call assert_true(v:none isnot 0)
1212    call assert_true(v:null isnot 0)
1213    call assert_true(v:null isnot v:none)
1214
1215    call assert_equal(v:false, eval(string(v:false)))
1216    call assert_equal(v:true, eval(string(v:true)))
1217    call assert_equal(v:none, eval(string(v:none)))
1218    call assert_equal(v:null, eval(string(v:null)))
1219
1220    call assert_equal(v:false, copy(v:false))
1221    call assert_equal(v:true, copy(v:true))
1222    call assert_equal(v:none, copy(v:none))
1223    call assert_equal(v:null, copy(v:null))
1224
1225    call assert_equal([v:false], deepcopy([v:false]))
1226    call assert_equal([v:true], deepcopy([v:true]))
1227    call assert_equal([v:none], deepcopy([v:none]))
1228    call assert_equal([v:null], deepcopy([v:null]))
1229
1230    call assert_true(empty(v:false))
1231    call assert_false(empty(v:true))
1232    call assert_true(empty(v:null))
1233    call assert_true(empty(v:none))
1234
1235    func ChangeYourMind()
1236	try
1237	    return v:true
1238	finally
1239	    return 'something else'
1240	endtry
1241    endfunc
1242
1243    call ChangeYourMind()
1244endfunc
1245
1246"-------------------------------------------------------------------------------
1247" Test 92:  skipping code					    {{{1
1248"-------------------------------------------------------------------------------
1249
1250func Test_skip()
1251    let Fn = function('Test_type')
1252    call assert_false(0 && Fn[1])
1253    call assert_false(0 && string(Fn))
1254    call assert_false(0 && len(Fn))
1255    let l = []
1256    call assert_false(0 && l[1])
1257    call assert_false(0 && string(l))
1258    call assert_false(0 && len(l))
1259    let f = 1.0
1260    call assert_false(0 && f[1])
1261    call assert_false(0 && string(f))
1262    call assert_false(0 && len(f))
1263    let sp = v:null
1264    call assert_false(0 && sp[1])
1265    call assert_false(0 && string(sp))
1266    call assert_false(0 && len(sp))
1267
1268endfunc
1269
1270"-------------------------------------------------------------------------------
1271" Test 93:  :echo and string()					    {{{1
1272"-------------------------------------------------------------------------------
1273
1274func Test_echo_and_string()
1275    " String
1276    let a = 'foo bar'
1277    redir => result
1278    echo a
1279    echo string(a)
1280    redir END
1281    let l = split(result, "\n")
1282    call assert_equal(["foo bar",
1283		     \ "'foo bar'"], l)
1284
1285    " Float
1286    if has('float')
1287	let a = -1.2e0
1288	redir => result
1289	echo a
1290	echo string(a)
1291	redir END
1292	let l = split(result, "\n")
1293	call assert_equal(["-1.2",
1294			 \ "-1.2"], l)
1295    endif
1296
1297    " Funcref
1298    redir => result
1299    echo function('string')
1300    echo string(function('string'))
1301    redir END
1302    let l = split(result, "\n")
1303    call assert_equal(["string",
1304		     \ "function('string')"], l)
1305
1306    " Recursive dictionary
1307    let a = {}
1308    let a["a"] = a
1309    redir => result
1310    echo a
1311    echo string(a)
1312    redir END
1313    let l = split(result, "\n")
1314    call assert_equal(["{'a': {...}}",
1315		     \ "{'a': {...}}"], l)
1316
1317    " Recursive list
1318    let a = [0]
1319    let a[0] = a
1320    redir => result
1321    echo a
1322    echo string(a)
1323    redir END
1324    let l = split(result, "\n")
1325    call assert_equal(["[[...]]",
1326		     \ "[[...]]"], l)
1327
1328    " Empty dictionaries in a list
1329    let a = {}
1330    redir => result
1331    echo [a, a, a]
1332    echo string([a, a, a])
1333    redir END
1334    let l = split(result, "\n")
1335    call assert_equal(["[{}, {}, {}]",
1336		     \ "[{}, {}, {}]"], l)
1337
1338    " Empty dictionaries in a dictionary
1339    let a = {}
1340    let b = {"a": a, "b": a}
1341    redir => result
1342    echo b
1343    echo string(b)
1344    redir END
1345    let l = split(result, "\n")
1346    call assert_equal(["{'a': {}, 'b': {}}",
1347		     \ "{'a': {}, 'b': {}}"], l)
1348
1349    " Empty lists in a list
1350    let a = []
1351    redir => result
1352    echo [a, a, a]
1353    echo string([a, a, a])
1354    redir END
1355    let l = split(result, "\n")
1356    call assert_equal(["[[], [], []]",
1357		     \ "[[], [], []]"], l)
1358
1359    " Empty lists in a dictionary
1360    let a = []
1361    let b = {"a": a, "b": a}
1362    redir => result
1363    echo b
1364    echo string(b)
1365    redir END
1366    let l = split(result, "\n")
1367    call assert_equal(["{'a': [], 'b': []}",
1368		     \ "{'a': [], 'b': []}"], l)
1369
1370    " Dictionaries in a list
1371    let a = {"one": "yes", "two": "yes", "three": "yes"}
1372    redir => result
1373    echo [a, a, a]
1374    echo string([a, a, a])
1375    redir END
1376    let l = split(result, "\n")
1377    call assert_equal(["[{'one': 'yes', 'two': 'yes', 'three': 'yes'}, {...}, {...}]",
1378		     \ "[{'one': 'yes', 'two': 'yes', 'three': 'yes'}, {'one': 'yes', 'two': 'yes', 'three': 'yes'}, {'one': 'yes', 'two': 'yes', 'three': 'yes'}]"], l)
1379
1380    " Dictionaries in a dictionary
1381    let a = {"one": "yes", "two": "yes", "three": "yes"}
1382    let b = {"a": a, "b": a}
1383    redir => result
1384    echo b
1385    echo string(b)
1386    redir END
1387    let l = split(result, "\n")
1388    call assert_equal(["{'a': {'one': 'yes', 'two': 'yes', 'three': 'yes'}, 'b': {...}}",
1389		     \ "{'a': {'one': 'yes', 'two': 'yes', 'three': 'yes'}, 'b': {'one': 'yes', 'two': 'yes', 'three': 'yes'}}"], l)
1390
1391    " Lists in a list
1392    let a = [1, 2, 3]
1393    redir => result
1394    echo [a, a, a]
1395    echo string([a, a, a])
1396    redir END
1397    let l = split(result, "\n")
1398    call assert_equal(["[[1, 2, 3], [...], [...]]",
1399		     \ "[[1, 2, 3], [1, 2, 3], [1, 2, 3]]"], l)
1400
1401    " Lists in a dictionary
1402    let a = [1, 2, 3]
1403    let b = {"a": a, "b": a}
1404    redir => result
1405    echo b
1406    echo string(b)
1407    redir END
1408    let l = split(result, "\n")
1409    call assert_equal(["{'a': [1, 2, 3], 'b': [...]}",
1410		     \ "{'a': [1, 2, 3], 'b': [1, 2, 3]}"], l)
1411
1412endfunc
1413
1414"-------------------------------------------------------------------------------
1415" Test 94:  64-bit Numbers					    {{{1
1416"-------------------------------------------------------------------------------
1417
1418func Test_num64()
1419    if !has('num64')
1420	return
1421    endif
1422
1423    call assert_notequal( 4294967296, 0)
1424    call assert_notequal(-4294967296, 0)
1425    call assert_equal( 4294967296,  0xFFFFffff + 1)
1426    call assert_equal(-4294967296, -0xFFFFffff - 1)
1427
1428    call assert_equal( 9223372036854775807,  1 / 0)
1429    call assert_equal(-9223372036854775807, -1 / 0)
1430    call assert_equal(-9223372036854775807 - 1,  0 / 0)
1431
1432    if has('float')
1433      call assert_equal( 0x7FFFffffFFFFffff, float2nr( 1.0e150))
1434      call assert_equal(-0x7FFFffffFFFFffff, float2nr(-1.0e150))
1435    endif
1436
1437    let rng = range(0xFFFFffff, 0x100000001)
1438    call assert_equal([0xFFFFffff, 0x100000000, 0x100000001], rng)
1439    call assert_equal(0x100000001, max(rng))
1440    call assert_equal(0xFFFFffff, min(rng))
1441    call assert_equal(rng, sort(range(0x100000001, 0xFFFFffff, -1), 'N'))
1442endfunc
1443
1444"-------------------------------------------------------------------------------
1445" Test 95:  lines of :append, :change, :insert			    {{{1
1446"-------------------------------------------------------------------------------
1447
1448function! DefineFunction(name, body)
1449    let func = join(['function! ' . a:name . '()'] + a:body + ['endfunction'], "\n")
1450    exec func
1451endfunction
1452
1453func Test_script_lines()
1454    " :append
1455    try
1456	call DefineFunction('T_Append', [
1457		    \ 'append',
1458		    \ 'py <<EOS',
1459		    \ '.',
1460		    \ ])
1461    catch
1462	call assert_report("Can't define function")
1463    endtry
1464    try
1465	call DefineFunction('T_Append', [
1466		    \ 'append',
1467		    \ 'abc',
1468		    \ ])
1469	call assert_report("Shouldn't be able to define function")
1470    catch
1471	call assert_exception('Vim(function):E126: Missing :endfunction')
1472    endtry
1473
1474    " :change
1475    try
1476	call DefineFunction('T_Change', [
1477		    \ 'change',
1478		    \ 'py <<EOS',
1479		    \ '.',
1480		    \ ])
1481    catch
1482	call assert_report("Can't define function")
1483    endtry
1484    try
1485	call DefineFunction('T_Change', [
1486		    \ 'change',
1487		    \ 'abc',
1488		    \ ])
1489	call assert_report("Shouldn't be able to define function")
1490    catch
1491	call assert_exception('Vim(function):E126: Missing :endfunction')
1492    endtry
1493
1494    " :insert
1495    try
1496	call DefineFunction('T_Insert', [
1497		    \ 'insert',
1498		    \ 'py <<EOS',
1499		    \ '.',
1500		    \ ])
1501    catch
1502	call assert_report("Can't define function")
1503    endtry
1504    try
1505	call DefineFunction('T_Insert', [
1506		    \ 'insert',
1507		    \ 'abc',
1508		    \ ])
1509	call assert_report("Shouldn't be able to define function")
1510    catch
1511	call assert_exception('Vim(function):E126: Missing :endfunction')
1512    endtry
1513endfunc
1514
1515"-------------------------------------------------------------------------------
1516" Test 96:  line continuation						    {{{1
1517"
1518"	    Undefined behavior was detected by ubsan with line continuation
1519"	    after an empty line.
1520"-------------------------------------------------------------------------------
1521func Test_script_emty_line_continuation()
1522
1523    \
1524endfunc
1525
1526"-------------------------------------------------------------------------------
1527" Test 97:  bitwise functions						    {{{1
1528"-------------------------------------------------------------------------------
1529func Test_bitwise_functions()
1530    " and
1531    call assert_equal(127, and(127, 127))
1532    call assert_equal(16, and(127, 16))
1533    eval 127->and(16)->assert_equal(16)
1534    call assert_equal(0, and(127, 128))
1535    call assert_fails("call and([], 1)", 'E745:')
1536    call assert_fails("call and({}, 1)", 'E728:')
1537    if has('float')
1538      call assert_fails("call and(1.0, 1)", 'E805:')
1539      call assert_fails("call and(1, 1.0)", 'E805:')
1540    endif
1541    call assert_fails("call and(1, [])", 'E745:')
1542    call assert_fails("call and(1, {})", 'E728:')
1543    " or
1544    call assert_equal(23, or(16, 7))
1545    call assert_equal(15, or(8, 7))
1546    eval 8->or(7)->assert_equal(15)
1547    call assert_equal(123, or(0, 123))
1548    call assert_fails("call or([], 1)", 'E745:')
1549    call assert_fails("call or({}, 1)", 'E728:')
1550    if has('float')
1551      call assert_fails("call or(1.0, 1)", 'E805:')
1552      call assert_fails("call or(1, 1.0)", 'E805:')
1553    endif
1554    call assert_fails("call or(1, [])", 'E745:')
1555    call assert_fails("call or(1, {})", 'E728:')
1556    " xor
1557    call assert_equal(0, xor(127, 127))
1558    call assert_equal(111, xor(127, 16))
1559    eval 127->xor(16)->assert_equal(111)
1560    call assert_equal(255, xor(127, 128))
1561    if has('float')
1562      call assert_fails("call xor(1.0, 1)", 'E805:')
1563      call assert_fails("call xor(1, 1.0)", 'E805:')
1564    endif
1565    call assert_fails("call xor([], 1)", 'E745:')
1566    call assert_fails("call xor({}, 1)", 'E728:')
1567    call assert_fails("call xor(1, [])", 'E745:')
1568    call assert_fails("call xor(1, {})", 'E728:')
1569    " invert
1570    call assert_equal(65408, and(invert(127), 65535))
1571    eval 127->invert()->and(65535)->assert_equal(65408)
1572    call assert_equal(65519, and(invert(16), 65535))
1573    call assert_equal(65407, and(invert(128), 65535))
1574    if has('float')
1575      call assert_fails("call invert(1.0)", 'E805:')
1576    endif
1577    call assert_fails("call invert([])", 'E745:')
1578    call assert_fails("call invert({})", 'E728:')
1579endfunc
1580
1581" Test trailing text after :endfunction				    {{{1
1582func Test_endfunction_trailing()
1583    call assert_false(exists('*Xtest'))
1584
1585    exe "func Xtest()\necho 'hello'\nendfunc\nlet done = 'yes'"
1586    call assert_true(exists('*Xtest'))
1587    call assert_equal('yes', done)
1588    delfunc Xtest
1589    unlet done
1590
1591    exe "func Xtest()\necho 'hello'\nendfunc|let done = 'yes'"
1592    call assert_true(exists('*Xtest'))
1593    call assert_equal('yes', done)
1594    delfunc Xtest
1595    unlet done
1596
1597    " trailing line break
1598    exe "func Xtest()\necho 'hello'\nendfunc\n"
1599    call assert_true(exists('*Xtest'))
1600    delfunc Xtest
1601
1602    set verbose=1
1603    exe "func Xtest()\necho 'hello'\nendfunc \" garbage"
1604    call assert_notmatch('W22:', split(execute('1messages'), "\n")[0])
1605    call assert_true(exists('*Xtest'))
1606    delfunc Xtest
1607
1608    exe "func Xtest()\necho 'hello'\nendfunc garbage"
1609    call assert_match('W22:', split(execute('1messages'), "\n")[0])
1610    call assert_true(exists('*Xtest'))
1611    delfunc Xtest
1612    set verbose=0
1613
1614    function Foo()
1615	echo 'hello'
1616    endfunction | echo 'xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx'
1617    delfunc Foo
1618endfunc
1619
1620func Test_delfunction_force()
1621    delfunc! Xtest
1622    delfunc! Xtest
1623    func Xtest()
1624	echo 'nothing'
1625    endfunc
1626    delfunc! Xtest
1627    delfunc! Xtest
1628endfunc
1629
1630" Test using bang after user command				    {{{1
1631func Test_user_command_with_bang()
1632    command -bang Nieuw let nieuw = 1
1633    Ni!
1634    call assert_equal(1, nieuw)
1635    unlet nieuw
1636    delcommand Nieuw
1637endfunc
1638
1639" Test for script-local function
1640func <SID>DoLast()
1641  call append(line('$'), "last line")
1642endfunc
1643
1644func s:DoNothing()
1645  call append(line('$'), "nothing line")
1646endfunc
1647
1648func Test_script_local_func()
1649  set nocp nomore viminfo+=nviminfo
1650  new
1651  nnoremap <buffer> _x	:call <SID>DoNothing()<bar>call <SID>DoLast()<bar>delfunc <SID>DoNothing<bar>delfunc <SID>DoLast<cr>
1652
1653  normal _x
1654  call assert_equal('nothing line', getline(2))
1655  call assert_equal('last line', getline(3))
1656  enew! | close
1657endfunc
1658
1659func Test_script_expand_sfile()
1660  let lines =<< trim END
1661    func s:snr()
1662      return expand('<sfile>')
1663    endfunc
1664    let g:result = s:snr()
1665  END
1666  call writefile(lines, 'Xexpand')
1667  source Xexpand
1668  call assert_match('<SNR>\d\+_snr', g:result)
1669  source Xexpand
1670  call assert_match('<SNR>\d\+_snr', g:result)
1671
1672  call delete('Xexpand')
1673  unlet g:result
1674endfunc
1675
1676func Test_compound_assignment_operators()
1677    " Test for number
1678    let x = 1
1679    let x += 10
1680    call assert_equal(11, x)
1681    let x -= 5
1682    call assert_equal(6, x)
1683    let x *= 4
1684    call assert_equal(24, x)
1685    let x /= 3
1686    call assert_equal(8, x)
1687    let x %= 3
1688    call assert_equal(2, x)
1689    let x .= 'n'
1690    call assert_equal('2n', x)
1691
1692    " Test special cases: division or modulus with 0.
1693    let x = 1
1694    let x /= 0
1695    if has('num64')
1696        call assert_equal(0x7FFFFFFFFFFFFFFF, x)
1697    else
1698        call assert_equal(0x7fffffff, x)
1699    endif
1700
1701    let x = -1
1702    let x /= 0
1703    if has('num64')
1704        call assert_equal(-0x7FFFFFFFFFFFFFFF, x)
1705    else
1706        call assert_equal(-0x7fffffff, x)
1707    endif
1708
1709    let x = 0
1710    let x /= 0
1711    if has('num64')
1712        call assert_equal(-0x7FFFFFFFFFFFFFFF - 1, x)
1713    else
1714        call assert_equal(-0x7FFFFFFF - 1, x)
1715    endif
1716
1717    let x = 1
1718    let x %= 0
1719    call assert_equal(0, x)
1720
1721    let x = -1
1722    let x %= 0
1723    call assert_equal(0, x)
1724
1725    let x = 0
1726    let x %= 0
1727    call assert_equal(0, x)
1728
1729    " Test for string
1730    let x = 'str'
1731    let x .= 'ing'
1732    call assert_equal('string', x)
1733    let x += 1
1734    call assert_equal(1, x)
1735
1736    if has('float')
1737      " Test for float
1738      let x -= 1.5
1739      call assert_equal(-0.5, x)
1740      let x = 0.5
1741      let x += 4.5
1742      call assert_equal(5.0, x)
1743      let x -= 1.5
1744      call assert_equal(3.5, x)
1745      let x *= 3.0
1746      call assert_equal(10.5, x)
1747      let x /= 2.5
1748      call assert_equal(4.2, x)
1749      call assert_fails('let x %= 0.5', 'E734')
1750      call assert_fails('let x .= "f"', 'E734')
1751    endif
1752
1753    " Test for environment variable
1754    let $FOO = 1
1755    call assert_fails('let $FOO += 1', 'E734')
1756    call assert_fails('let $FOO -= 1', 'E734')
1757    call assert_fails('let $FOO *= 1', 'E734')
1758    call assert_fails('let $FOO /= 1', 'E734')
1759    call assert_fails('let $FOO %= 1', 'E734')
1760    let $FOO .= 's'
1761    call assert_equal('1s', $FOO)
1762    unlet $FOO
1763
1764    " Test for option variable (type: number)
1765    let &scrolljump = 1
1766    let &scrolljump += 5
1767    call assert_equal(6, &scrolljump)
1768    let &scrolljump -= 2
1769    call assert_equal(4, &scrolljump)
1770    let &scrolljump *= 3
1771    call assert_equal(12, &scrolljump)
1772    let &scrolljump /= 2
1773    call assert_equal(6, &scrolljump)
1774    let &scrolljump %= 5
1775    call assert_equal(1, &scrolljump)
1776    call assert_fails('let &scrolljump .= "j"', 'E734')
1777    set scrolljump&vim
1778
1779    " Test for register
1780    let @/ = 1
1781    call assert_fails('let @/ += 1', 'E734')
1782    call assert_fails('let @/ -= 1', 'E734')
1783    call assert_fails('let @/ *= 1', 'E734')
1784    call assert_fails('let @/ /= 1', 'E734')
1785    call assert_fails('let @/ %= 1', 'E734')
1786    let @/ .= 's'
1787    call assert_equal('1s', @/)
1788    let @/ = ''
1789endfunc
1790
1791func Test_refcount()
1792    " Immediate values
1793    call assert_equal(-1, test_refcount(1))
1794    call assert_equal(-1, test_refcount('s'))
1795    call assert_equal(-1, test_refcount(v:true))
1796    call assert_equal(0, test_refcount([]))
1797    call assert_equal(0, test_refcount({}))
1798    call assert_equal(0, test_refcount(0zff))
1799    call assert_equal(0, test_refcount({-> line('.')}))
1800    if has('float')
1801        call assert_equal(-1, test_refcount(0.1))
1802    endif
1803    if has('job')
1804        call assert_equal(0, test_refcount(job_start([&shell, &shellcmdflag, 'echo .'])))
1805    endif
1806
1807    " No refcount types
1808    let x = 1
1809    call assert_equal(-1, test_refcount(x))
1810    let x = 's'
1811    call assert_equal(-1, test_refcount(x))
1812    let x = v:true
1813    call assert_equal(-1, test_refcount(x))
1814    if has('float')
1815        let x = 0.1
1816        call assert_equal(-1, test_refcount(x))
1817    endif
1818
1819    " Check refcount
1820    let x = []
1821    call assert_equal(1, test_refcount(x))
1822
1823    let x = {}
1824    call assert_equal(1, x->test_refcount())
1825
1826    let x = 0zff
1827    call assert_equal(1, test_refcount(x))
1828
1829    let X = {-> line('.')}
1830    call assert_equal(1, test_refcount(X))
1831    let Y = X
1832    call assert_equal(2, test_refcount(X))
1833
1834    if has('job')
1835        let job = job_start([&shell, &shellcmdflag, 'echo .'])
1836        call assert_equal(1, test_refcount(job))
1837        call assert_equal(1, test_refcount(job_getchannel(job)))
1838        call assert_equal(1, test_refcount(job))
1839    endif
1840
1841    " Function arguments, copying and unassigning
1842    func ExprCheck(x, i)
1843        let i = a:i + 1
1844        call assert_equal(i, test_refcount(a:x))
1845        let Y = a:x
1846        call assert_equal(i + 1, test_refcount(a:x))
1847        call assert_equal(test_refcount(a:x), test_refcount(Y))
1848        let Y = 0
1849        call assert_equal(i, test_refcount(a:x))
1850    endfunc
1851    call ExprCheck([], 0)
1852    call ExprCheck({}, 0)
1853    call ExprCheck(0zff, 0)
1854    call ExprCheck({-> line('.')}, 0)
1855    if has('job')
1856	call ExprCheck(job, 1)
1857	call ExprCheck(job_getchannel(job), 1)
1858	call job_stop(job)
1859    endif
1860    delfunc ExprCheck
1861
1862    " Regarding function
1863    func Func(x) abort
1864        call assert_equal(2, test_refcount(function('Func')))
1865        call assert_equal(0, test_refcount(funcref('Func')))
1866    endfunc
1867    call assert_equal(1, test_refcount(function('Func')))
1868    call assert_equal(0, test_refcount(function('Func', [1])))
1869    call assert_equal(0, test_refcount(funcref('Func')))
1870    call assert_equal(0, test_refcount(funcref('Func', [1])))
1871    let X = function('Func')
1872    let Y = X
1873    call assert_equal(1, test_refcount(X))
1874    let X = function('Func', [1])
1875    let Y = X
1876    call assert_equal(2, test_refcount(X))
1877    let X = funcref('Func')
1878    let Y = X
1879    call assert_equal(2, test_refcount(X))
1880    let X = funcref('Func', [1])
1881    let Y = X
1882    call assert_equal(2, test_refcount(X))
1883    unlet X
1884    unlet Y
1885    call Func(1)
1886    delfunc Func
1887
1888    " Function with dict
1889    func DictFunc() dict
1890        call assert_equal(3, test_refcount(self))
1891    endfunc
1892    let d = {'Func': function('DictFunc')}
1893    call assert_equal(1, test_refcount(d))
1894    call assert_equal(0, test_refcount(d.Func))
1895    call d.Func()
1896    unlet d
1897    delfunc DictFunc
1898endfunc
1899
1900func Test_funccall_garbage_collect()
1901    func Func(x, ...)
1902        call add(a:x, a:000)
1903    endfunc
1904    call Func([], [])
1905    " Must not crash cause by invalid freeing
1906    call test_garbagecollect_now()
1907    call assert_true(v:true)
1908    delfunc Func
1909endfunc
1910
1911func Test_function_defined_line()
1912    CheckNotGui
1913
1914    let lines =<< trim [CODE]
1915    " F1
1916    func F1()
1917        " F2
1918        func F2()
1919            "
1920            "
1921            "
1922            return
1923        endfunc
1924        " F3
1925        execute "func F3()\n\n\n\nreturn\nendfunc"
1926        " F4
1927        execute "func F4()\n
1928                    \\n
1929                    \\n
1930                    \\n
1931                    \return\n
1932                    \endfunc"
1933    endfunc
1934    " F5
1935    execute "func F5()\n\n\n\nreturn\nendfunc"
1936    " F6
1937    execute "func F6()\n
1938                \\n
1939                \\n
1940                \\n
1941                \return\n
1942                \endfunc"
1943    call F1()
1944    verbose func F1
1945    verbose func F2
1946    verbose func F3
1947    verbose func F4
1948    verbose func F5
1949    verbose func F6
1950    qall!
1951    [CODE]
1952
1953    call writefile(lines, 'Xtest.vim')
1954    let res = system(GetVimCommandClean() .. ' -es -X -S Xtest.vim')
1955    call assert_equal(0, v:shell_error)
1956
1957    let m = matchstr(res, 'function F1()[^[:print:]]*[[:print:]]*')
1958    call assert_match(' line 2$', m)
1959
1960    let m = matchstr(res, 'function F2()[^[:print:]]*[[:print:]]*')
1961    call assert_match(' line 4$', m)
1962
1963    let m = matchstr(res, 'function F3()[^[:print:]]*[[:print:]]*')
1964    call assert_match(' line 11$', m)
1965
1966    let m = matchstr(res, 'function F4()[^[:print:]]*[[:print:]]*')
1967    call assert_match(' line 13$', m)
1968
1969    let m = matchstr(res, 'function F5()[^[:print:]]*[[:print:]]*')
1970    call assert_match(' line 21$', m)
1971
1972    let m = matchstr(res, 'function F6()[^[:print:]]*[[:print:]]*')
1973    call assert_match(' line 23$', m)
1974
1975    call delete('Xtest.vim')
1976endfunc
1977
1978" Test for missing :endif, :endfor, :endwhile and :endtry           {{{1
1979func Test_missing_end()
1980  call writefile(['if 2 > 1', 'echo ">"'], 'Xscript')
1981  call assert_fails('source Xscript', 'E171:')
1982  call writefile(['for i in range(5)', 'echo i'], 'Xscript')
1983  call assert_fails('source Xscript', 'E170:')
1984  call writefile(['while v:true', 'echo "."'], 'Xscript')
1985  call assert_fails('source Xscript', 'E170:')
1986  call writefile(['try', 'echo "."'], 'Xscript')
1987  call assert_fails('source Xscript', 'E600:')
1988  call delete('Xscript')
1989endfunc
1990
1991" Test for deep nesting of if/for/while/try statements              {{{1
1992func Test_deep_nest()
1993  if !CanRunVimInTerminal()
1994    throw 'Skipped: cannot run vim in terminal'
1995  endif
1996
1997  let lines =<< trim [SCRIPT]
1998    " Deep nesting of if ... endif
1999    func Test1()
2000      let @a = join(repeat(['if v:true'], 51), "\n")
2001      let @a ..= "\n"
2002      let @a ..= join(repeat(['endif'], 51), "\n")
2003      @a
2004      let @a = ''
2005    endfunc
2006
2007    " Deep nesting of for ... endfor
2008    func Test2()
2009      let @a = join(repeat(['for i in [1]'], 51), "\n")
2010      let @a ..= "\n"
2011      let @a ..= join(repeat(['endfor'], 51), "\n")
2012      @a
2013      let @a = ''
2014    endfunc
2015
2016    " Deep nesting of while ... endwhile
2017    func Test3()
2018      let @a = join(repeat(['while v:true'], 51), "\n")
2019      let @a ..= "\n"
2020      let @a ..= join(repeat(['endwhile'], 51), "\n")
2021      @a
2022      let @a = ''
2023    endfunc
2024
2025    " Deep nesting of try ... endtry
2026    func Test4()
2027      let @a = join(repeat(['try'], 51), "\n")
2028      let @a ..= "\necho v:true\n"
2029      let @a ..= join(repeat(['endtry'], 51), "\n")
2030      @a
2031      let @a = ''
2032    endfunc
2033  [SCRIPT]
2034  call writefile(lines, 'Xscript')
2035
2036  let buf = RunVimInTerminal('-S Xscript', {'rows': 6})
2037
2038  " Deep nesting of if ... endif
2039  call term_sendkeys(buf, ":call Test1()\n")
2040  call WaitForAssert({-> assert_match('^E579:', term_getline(buf, 5))})
2041
2042  " Deep nesting of for ... endfor
2043  call term_sendkeys(buf, ":call Test2()\n")
2044  call WaitForAssert({-> assert_match('^E585:', term_getline(buf, 5))})
2045
2046  " Deep nesting of while ... endwhile
2047  call term_sendkeys(buf, ":call Test3()\n")
2048  call WaitForAssert({-> assert_match('^E585:', term_getline(buf, 5))})
2049
2050  " Deep nesting of try ... endtry
2051  call term_sendkeys(buf, ":call Test4()\n")
2052  call WaitForAssert({-> assert_match('^E601:', term_getline(buf, 5))})
2053
2054  "let l = ''
2055  "for i in range(1, 6)
2056  "  let l ..= term_getline(buf, i) . "\n"
2057  "endfor
2058  "call assert_report(l)
2059
2060  call StopVimInTerminal(buf)
2061  call delete('Xscript')
2062endfunc
2063
2064"-------------------------------------------------------------------------------
2065" Modelines								    {{{1
2066" vim: ts=8 sw=2 sts=2 expandtab tw=80 fdm=marker
2067"-------------------------------------------------------------------------------
2068