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    call assert_equal(5, type(0.0))
1146    call assert_equal(6, type(v:false))
1147    call assert_equal(6, type(v:true))
1148    call assert_equal(7, type(v:none))
1149    call assert_equal(7, type(v:null))
1150    call assert_equal(8, v:t_job)
1151    call assert_equal(9, v:t_channel)
1152    call assert_equal(v:t_number, type(0))
1153    call assert_equal(v:t_string, type(""))
1154    call assert_equal(v:t_func, type(function("tr")))
1155    call assert_equal(v:t_func, type(function("tr", [8])))
1156    call assert_equal(v:t_list, type([]))
1157    call assert_equal(v:t_dict, type({}))
1158    call assert_equal(v:t_float, type(0.0))
1159    call assert_equal(v:t_bool, type(v:false))
1160    call assert_equal(v:t_bool, type(v:true))
1161    call assert_equal(v:t_none, type(v:none))
1162    call assert_equal(v:t_none, type(v:null))
1163
1164
1165    call assert_equal(0, 0 + v:false)
1166    call assert_equal(1, 0 + v:true)
1167    call assert_equal(0, 0 + v:none)
1168    call assert_equal(0, 0 + v:null)
1169
1170    call assert_equal('v:false', '' . v:false)
1171    call assert_equal('v:true', '' . v:true)
1172    call assert_equal('v:none', '' . v:none)
1173    call assert_equal('v:null', '' . v:null)
1174
1175    call assert_true(v:false == 0)
1176    call assert_false(v:false != 0)
1177    call assert_true(v:true == 1)
1178    call assert_false(v:true != 1)
1179    call assert_false(v:true == v:false)
1180    call assert_true(v:true != v:false)
1181
1182    call assert_true(v:null == 0)
1183    call assert_false(v:null != 0)
1184    call assert_true(v:none == 0)
1185    call assert_false(v:none != 0)
1186
1187    call assert_true(v:false is v:false)
1188    call assert_true(v:true is v:true)
1189    call assert_true(v:none is v:none)
1190    call assert_true(v:null is v:null)
1191
1192    call assert_false(v:false isnot v:false)
1193    call assert_false(v:true isnot v:true)
1194    call assert_false(v:none isnot v:none)
1195    call assert_false(v:null isnot v:null)
1196
1197    call assert_false(v:false is 0)
1198    call assert_false(v:true is 1)
1199    call assert_false(v:true is v:false)
1200    call assert_false(v:none is 0)
1201    call assert_false(v:null is 0)
1202    call assert_false(v:null is v:none)
1203
1204    call assert_true(v:false isnot 0)
1205    call assert_true(v:true isnot 1)
1206    call assert_true(v:true isnot v:false)
1207    call assert_true(v:none isnot 0)
1208    call assert_true(v:null isnot 0)
1209    call assert_true(v:null isnot v:none)
1210
1211    call assert_equal(v:false, eval(string(v:false)))
1212    call assert_equal(v:true, eval(string(v:true)))
1213    call assert_equal(v:none, eval(string(v:none)))
1214    call assert_equal(v:null, eval(string(v:null)))
1215
1216    call assert_equal(v:false, copy(v:false))
1217    call assert_equal(v:true, copy(v:true))
1218    call assert_equal(v:none, copy(v:none))
1219    call assert_equal(v:null, copy(v:null))
1220
1221    call assert_equal([v:false], deepcopy([v:false]))
1222    call assert_equal([v:true], deepcopy([v:true]))
1223    call assert_equal([v:none], deepcopy([v:none]))
1224    call assert_equal([v:null], deepcopy([v:null]))
1225
1226    call assert_true(empty(v:false))
1227    call assert_false(empty(v:true))
1228    call assert_true(empty(v:null))
1229    call assert_true(empty(v:none))
1230
1231    func ChangeYourMind()
1232	try
1233	    return v:true
1234	finally
1235	    return 'something else'
1236	endtry
1237    endfunc
1238
1239    call ChangeYourMind()
1240endfunc
1241
1242"-------------------------------------------------------------------------------
1243" Test 92:  skipping code					    {{{1
1244"-------------------------------------------------------------------------------
1245
1246func Test_skip()
1247    let Fn = function('Test_type')
1248    call assert_false(0 && Fn[1])
1249    call assert_false(0 && string(Fn))
1250    call assert_false(0 && len(Fn))
1251    let l = []
1252    call assert_false(0 && l[1])
1253    call assert_false(0 && string(l))
1254    call assert_false(0 && len(l))
1255    let f = 1.0
1256    call assert_false(0 && f[1])
1257    call assert_false(0 && string(f))
1258    call assert_false(0 && len(f))
1259    let sp = v:null
1260    call assert_false(0 && sp[1])
1261    call assert_false(0 && string(sp))
1262    call assert_false(0 && len(sp))
1263
1264endfunc
1265
1266"-------------------------------------------------------------------------------
1267" Test 93:  :echo and string()					    {{{1
1268"-------------------------------------------------------------------------------
1269
1270func Test_echo_and_string()
1271    " String
1272    let a = 'foo bar'
1273    redir => result
1274    echo a
1275    echo string(a)
1276    redir END
1277    let l = split(result, "\n")
1278    call assert_equal(["foo bar",
1279		     \ "'foo bar'"], l)
1280
1281    " Float
1282    if has('float')
1283	let a = -1.2e0
1284	redir => result
1285	echo a
1286	echo string(a)
1287	redir END
1288	let l = split(result, "\n")
1289	call assert_equal(["-1.2",
1290			 \ "-1.2"], l)
1291    endif
1292
1293    " Funcref
1294    redir => result
1295    echo function('string')
1296    echo string(function('string'))
1297    redir END
1298    let l = split(result, "\n")
1299    call assert_equal(["string",
1300		     \ "function('string')"], l)
1301
1302    " Recursive dictionary
1303    let a = {}
1304    let a["a"] = a
1305    redir => result
1306    echo a
1307    echo string(a)
1308    redir END
1309    let l = split(result, "\n")
1310    call assert_equal(["{'a': {...}}",
1311		     \ "{'a': {...}}"], l)
1312
1313    " Recursive list
1314    let a = [0]
1315    let a[0] = a
1316    redir => result
1317    echo a
1318    echo string(a)
1319    redir END
1320    let l = split(result, "\n")
1321    call assert_equal(["[[...]]",
1322		     \ "[[...]]"], l)
1323
1324    " Empty dictionaries in a list
1325    let a = {}
1326    redir => result
1327    echo [a, a, a]
1328    echo string([a, a, a])
1329    redir END
1330    let l = split(result, "\n")
1331    call assert_equal(["[{}, {}, {}]",
1332		     \ "[{}, {}, {}]"], l)
1333
1334    " Empty dictionaries in a dictionary
1335    let a = {}
1336    let b = {"a": a, "b": a}
1337    redir => result
1338    echo b
1339    echo string(b)
1340    redir END
1341    let l = split(result, "\n")
1342    call assert_equal(["{'a': {}, 'b': {}}",
1343		     \ "{'a': {}, 'b': {}}"], l)
1344
1345    " Empty lists in a list
1346    let a = []
1347    redir => result
1348    echo [a, a, a]
1349    echo string([a, a, a])
1350    redir END
1351    let l = split(result, "\n")
1352    call assert_equal(["[[], [], []]",
1353		     \ "[[], [], []]"], l)
1354
1355    " Empty lists in a dictionary
1356    let a = []
1357    let b = {"a": a, "b": a}
1358    redir => result
1359    echo b
1360    echo string(b)
1361    redir END
1362    let l = split(result, "\n")
1363    call assert_equal(["{'a': [], 'b': []}",
1364		     \ "{'a': [], 'b': []}"], l)
1365
1366    " Dictionaries in a list
1367    let a = {"one": "yes", "two": "yes", "three": "yes"}
1368    redir => result
1369    echo [a, a, a]
1370    echo string([a, a, a])
1371    redir END
1372    let l = split(result, "\n")
1373    call assert_equal(["[{'one': 'yes', 'two': 'yes', 'three': 'yes'}, {...}, {...}]",
1374		     \ "[{'one': 'yes', 'two': 'yes', 'three': 'yes'}, {'one': 'yes', 'two': 'yes', 'three': 'yes'}, {'one': 'yes', 'two': 'yes', 'three': 'yes'}]"], l)
1375
1376    " Dictionaries in a dictionary
1377    let a = {"one": "yes", "two": "yes", "three": "yes"}
1378    let b = {"a": a, "b": a}
1379    redir => result
1380    echo b
1381    echo string(b)
1382    redir END
1383    let l = split(result, "\n")
1384    call assert_equal(["{'a': {'one': 'yes', 'two': 'yes', 'three': 'yes'}, 'b': {...}}",
1385		     \ "{'a': {'one': 'yes', 'two': 'yes', 'three': 'yes'}, 'b': {'one': 'yes', 'two': 'yes', 'three': 'yes'}}"], l)
1386
1387    " Lists in a list
1388    let a = [1, 2, 3]
1389    redir => result
1390    echo [a, a, a]
1391    echo string([a, a, a])
1392    redir END
1393    let l = split(result, "\n")
1394    call assert_equal(["[[1, 2, 3], [...], [...]]",
1395		     \ "[[1, 2, 3], [1, 2, 3], [1, 2, 3]]"], l)
1396
1397    " Lists in a dictionary
1398    let a = [1, 2, 3]
1399    let b = {"a": a, "b": a}
1400    redir => result
1401    echo b
1402    echo string(b)
1403    redir END
1404    let l = split(result, "\n")
1405    call assert_equal(["{'a': [1, 2, 3], 'b': [...]}",
1406		     \ "{'a': [1, 2, 3], 'b': [1, 2, 3]}"], l)
1407
1408endfunc
1409
1410"-------------------------------------------------------------------------------
1411" Test 94:  64-bit Numbers					    {{{1
1412"-------------------------------------------------------------------------------
1413
1414func Test_num64()
1415    if !has('num64')
1416	return
1417    endif
1418
1419    call assert_notequal( 4294967296, 0)
1420    call assert_notequal(-4294967296, 0)
1421    call assert_equal( 4294967296,  0xFFFFffff + 1)
1422    call assert_equal(-4294967296, -0xFFFFffff - 1)
1423
1424    call assert_equal( 9223372036854775807,  1 / 0)
1425    call assert_equal(-9223372036854775807, -1 / 0)
1426    call assert_equal(-9223372036854775807 - 1,  0 / 0)
1427
1428    call assert_equal( 0x7FFFffffFFFFffff, float2nr( 1.0e150))
1429    call assert_equal(-0x7FFFffffFFFFffff, float2nr(-1.0e150))
1430
1431    let rng = range(0xFFFFffff, 0x100000001)
1432    call assert_equal([0xFFFFffff, 0x100000000, 0x100000001], rng)
1433    call assert_equal(0x100000001, max(rng))
1434    call assert_equal(0xFFFFffff, min(rng))
1435    call assert_equal(rng, sort(range(0x100000001, 0xFFFFffff, -1), 'N'))
1436endfunc
1437
1438"-------------------------------------------------------------------------------
1439" Test 95:  lines of :append, :change, :insert			    {{{1
1440"-------------------------------------------------------------------------------
1441
1442function! DefineFunction(name, body)
1443    let func = join(['function! ' . a:name . '()'] + a:body + ['endfunction'], "\n")
1444    exec func
1445endfunction
1446
1447func Test_script_lines()
1448    " :append
1449    try
1450	call DefineFunction('T_Append', [
1451		    \ 'append',
1452		    \ 'py <<EOS',
1453		    \ '.',
1454		    \ ])
1455    catch
1456	call assert_report("Can't define function")
1457    endtry
1458    try
1459	call DefineFunction('T_Append', [
1460		    \ 'append',
1461		    \ 'abc',
1462		    \ ])
1463	call assert_report("Shouldn't be able to define function")
1464    catch
1465	call assert_exception('Vim(function):E126: Missing :endfunction')
1466    endtry
1467
1468    " :change
1469    try
1470	call DefineFunction('T_Change', [
1471		    \ 'change',
1472		    \ 'py <<EOS',
1473		    \ '.',
1474		    \ ])
1475    catch
1476	call assert_report("Can't define function")
1477    endtry
1478    try
1479	call DefineFunction('T_Change', [
1480		    \ 'change',
1481		    \ 'abc',
1482		    \ ])
1483	call assert_report("Shouldn't be able to define function")
1484    catch
1485	call assert_exception('Vim(function):E126: Missing :endfunction')
1486    endtry
1487
1488    " :insert
1489    try
1490	call DefineFunction('T_Insert', [
1491		    \ 'insert',
1492		    \ 'py <<EOS',
1493		    \ '.',
1494		    \ ])
1495    catch
1496	call assert_report("Can't define function")
1497    endtry
1498    try
1499	call DefineFunction('T_Insert', [
1500		    \ 'insert',
1501		    \ 'abc',
1502		    \ ])
1503	call assert_report("Shouldn't be able to define function")
1504    catch
1505	call assert_exception('Vim(function):E126: Missing :endfunction')
1506    endtry
1507endfunc
1508
1509"-------------------------------------------------------------------------------
1510" Test 96:  line continuation						    {{{1
1511"
1512"	    Undefined behavior was detected by ubsan with line continuation
1513"	    after an empty line.
1514"-------------------------------------------------------------------------------
1515func Test_script_emty_line_continuation()
1516
1517    \
1518endfunc
1519
1520"-------------------------------------------------------------------------------
1521" Test 97:  bitwise functions						    {{{1
1522"-------------------------------------------------------------------------------
1523func Test_bitwise_functions()
1524    " and
1525    call assert_equal(127, and(127, 127))
1526    call assert_equal(16, and(127, 16))
1527    eval 127->and(16)->assert_equal(16)
1528    call assert_equal(0, and(127, 128))
1529    call assert_fails("call and(1.0, 1)", 'E805:')
1530    call assert_fails("call and([], 1)", 'E745:')
1531    call assert_fails("call and({}, 1)", 'E728:')
1532    call assert_fails("call and(1, 1.0)", 'E805:')
1533    call assert_fails("call and(1, [])", 'E745:')
1534    call assert_fails("call and(1, {})", 'E728:')
1535    " or
1536    call assert_equal(23, or(16, 7))
1537    call assert_equal(15, or(8, 7))
1538    eval 8->or(7)->assert_equal(15)
1539    call assert_equal(123, or(0, 123))
1540    call assert_fails("call or(1.0, 1)", 'E805:')
1541    call assert_fails("call or([], 1)", 'E745:')
1542    call assert_fails("call or({}, 1)", 'E728:')
1543    call assert_fails("call or(1, 1.0)", 'E805:')
1544    call assert_fails("call or(1, [])", 'E745:')
1545    call assert_fails("call or(1, {})", 'E728:')
1546    " xor
1547    call assert_equal(0, xor(127, 127))
1548    call assert_equal(111, xor(127, 16))
1549    eval 127->xor(16)->assert_equal(111)
1550    call assert_equal(255, xor(127, 128))
1551    call assert_fails("call xor(1.0, 1)", 'E805:')
1552    call assert_fails("call xor([], 1)", 'E745:')
1553    call assert_fails("call xor({}, 1)", 'E728:')
1554    call assert_fails("call xor(1, 1.0)", 'E805:')
1555    call assert_fails("call xor(1, [])", 'E745:')
1556    call assert_fails("call xor(1, {})", 'E728:')
1557    " invert
1558    call assert_equal(65408, and(invert(127), 65535))
1559    eval 127->invert()->and(65535)->assert_equal(65408)
1560    call assert_equal(65519, and(invert(16), 65535))
1561    call assert_equal(65407, and(invert(128), 65535))
1562    call assert_fails("call invert(1.0)", 'E805:')
1563    call assert_fails("call invert([])", 'E745:')
1564    call assert_fails("call invert({})", 'E728:')
1565endfunc
1566
1567" Test trailing text after :endfunction				    {{{1
1568func Test_endfunction_trailing()
1569    call assert_false(exists('*Xtest'))
1570
1571    exe "func Xtest()\necho 'hello'\nendfunc\nlet done = 'yes'"
1572    call assert_true(exists('*Xtest'))
1573    call assert_equal('yes', done)
1574    delfunc Xtest
1575    unlet done
1576
1577    exe "func Xtest()\necho 'hello'\nendfunc|let done = 'yes'"
1578    call assert_true(exists('*Xtest'))
1579    call assert_equal('yes', done)
1580    delfunc Xtest
1581    unlet done
1582
1583    " trailing line break
1584    exe "func Xtest()\necho 'hello'\nendfunc\n"
1585    call assert_true(exists('*Xtest'))
1586    delfunc Xtest
1587
1588    set verbose=1
1589    exe "func Xtest()\necho 'hello'\nendfunc \" garbage"
1590    call assert_notmatch('W22:', split(execute('1messages'), "\n")[0])
1591    call assert_true(exists('*Xtest'))
1592    delfunc Xtest
1593
1594    exe "func Xtest()\necho 'hello'\nendfunc garbage"
1595    call assert_match('W22:', split(execute('1messages'), "\n")[0])
1596    call assert_true(exists('*Xtest'))
1597    delfunc Xtest
1598    set verbose=0
1599
1600    function Foo()
1601	echo 'hello'
1602    endfunction | echo 'xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx'
1603    delfunc Foo
1604endfunc
1605
1606func Test_delfunction_force()
1607    delfunc! Xtest
1608    delfunc! Xtest
1609    func Xtest()
1610	echo 'nothing'
1611    endfunc
1612    delfunc! Xtest
1613    delfunc! Xtest
1614endfunc
1615
1616" Test using bang after user command				    {{{1
1617func Test_user_command_with_bang()
1618    command -bang Nieuw let nieuw = 1
1619    Ni!
1620    call assert_equal(1, nieuw)
1621    unlet nieuw
1622    delcommand Nieuw
1623endfunc
1624
1625" Test for script-local function
1626func <SID>DoLast()
1627  call append(line('$'), "last line")
1628endfunc
1629
1630func s:DoNothing()
1631  call append(line('$'), "nothing line")
1632endfunc
1633
1634func Test_script_local_func()
1635  set nocp nomore viminfo+=nviminfo
1636  new
1637  nnoremap <buffer> _x	:call <SID>DoNothing()<bar>call <SID>DoLast()<bar>delfunc <SID>DoNothing<bar>delfunc <SID>DoLast<cr>
1638
1639  normal _x
1640  call assert_equal('nothing line', getline(2))
1641  call assert_equal('last line', getline(3))
1642  enew! | close
1643endfunc
1644
1645func Test_script_expand_sfile()
1646  let lines =<< trim END
1647    func s:snr()
1648      return expand('<sfile>')
1649    endfunc
1650    let g:result = s:snr()
1651  END
1652  call writefile(lines, 'Xexpand')
1653  source Xexpand
1654  call assert_match('<SNR>\d\+_snr', g:result)
1655  source Xexpand
1656  call assert_match('<SNR>\d\+_snr', g:result)
1657
1658  call delete('Xexpand')
1659  unlet g:result
1660endfunc
1661
1662func Test_compound_assignment_operators()
1663    " Test for number
1664    let x = 1
1665    let x += 10
1666    call assert_equal(11, x)
1667    let x -= 5
1668    call assert_equal(6, x)
1669    let x *= 4
1670    call assert_equal(24, x)
1671    let x /= 3
1672    call assert_equal(8, x)
1673    let x %= 3
1674    call assert_equal(2, x)
1675    let x .= 'n'
1676    call assert_equal('2n', x)
1677
1678    " Test special cases: division or modulus with 0.
1679    let x = 1
1680    let x /= 0
1681    if has('num64')
1682        call assert_equal(0x7FFFFFFFFFFFFFFF, x)
1683    else
1684        call assert_equal(0x7fffffff, x)
1685    endif
1686
1687    let x = -1
1688    let x /= 0
1689    if has('num64')
1690        call assert_equal(-0x7FFFFFFFFFFFFFFF, x)
1691    else
1692        call assert_equal(-0x7fffffff, x)
1693    endif
1694
1695    let x = 0
1696    let x /= 0
1697    if has('num64')
1698        call assert_equal(-0x7FFFFFFFFFFFFFFF - 1, x)
1699    else
1700        call assert_equal(-0x7FFFFFFF - 1, x)
1701    endif
1702
1703    let x = 1
1704    let x %= 0
1705    call assert_equal(0, x)
1706
1707    let x = -1
1708    let x %= 0
1709    call assert_equal(0, x)
1710
1711    let x = 0
1712    let x %= 0
1713    call assert_equal(0, x)
1714
1715    " Test for string
1716    let x = 'str'
1717    let x .= 'ing'
1718    call assert_equal('string', x)
1719    let x += 1
1720    call assert_equal(1, x)
1721    let x -= 1.5
1722    call assert_equal(-0.5, x)
1723
1724    if has('float')
1725        " Test for float
1726        let x = 0.5
1727        let x += 4.5
1728        call assert_equal(5.0, x)
1729        let x -= 1.5
1730        call assert_equal(3.5, x)
1731        let x *= 3.0
1732        call assert_equal(10.5, x)
1733        let x /= 2.5
1734        call assert_equal(4.2, x)
1735        call assert_fails('let x %= 0.5', 'E734')
1736        call assert_fails('let x .= "f"', 'E734')
1737    endif
1738
1739    " Test for environment variable
1740    let $FOO = 1
1741    call assert_fails('let $FOO += 1', 'E734')
1742    call assert_fails('let $FOO -= 1', 'E734')
1743    call assert_fails('let $FOO *= 1', 'E734')
1744    call assert_fails('let $FOO /= 1', 'E734')
1745    call assert_fails('let $FOO %= 1', 'E734')
1746    let $FOO .= 's'
1747    call assert_equal('1s', $FOO)
1748    unlet $FOO
1749
1750    " Test for option variable (type: number)
1751    let &scrolljump = 1
1752    let &scrolljump += 5
1753    call assert_equal(6, &scrolljump)
1754    let &scrolljump -= 2
1755    call assert_equal(4, &scrolljump)
1756    let &scrolljump *= 3
1757    call assert_equal(12, &scrolljump)
1758    let &scrolljump /= 2
1759    call assert_equal(6, &scrolljump)
1760    let &scrolljump %= 5
1761    call assert_equal(1, &scrolljump)
1762    call assert_fails('let &scrolljump .= "j"', 'E734')
1763    set scrolljump&vim
1764
1765    " Test for register
1766    let @/ = 1
1767    call assert_fails('let @/ += 1', 'E734')
1768    call assert_fails('let @/ -= 1', 'E734')
1769    call assert_fails('let @/ *= 1', 'E734')
1770    call assert_fails('let @/ /= 1', 'E734')
1771    call assert_fails('let @/ %= 1', 'E734')
1772    let @/ .= 's'
1773    call assert_equal('1s', @/)
1774    let @/ = ''
1775endfunc
1776
1777func Test_refcount()
1778    " Immediate values
1779    call assert_equal(-1, test_refcount(1))
1780    call assert_equal(-1, test_refcount('s'))
1781    call assert_equal(-1, test_refcount(v:true))
1782    call assert_equal(0, test_refcount([]))
1783    call assert_equal(0, test_refcount({}))
1784    call assert_equal(0, test_refcount(0zff))
1785    call assert_equal(0, test_refcount({-> line('.')}))
1786    if has('float')
1787        call assert_equal(-1, test_refcount(0.1))
1788    endif
1789    if has('job')
1790        call assert_equal(0, test_refcount(job_start([&shell, &shellcmdflag, 'echo .'])))
1791    endif
1792
1793    " No refcount types
1794    let x = 1
1795    call assert_equal(-1, test_refcount(x))
1796    let x = 's'
1797    call assert_equal(-1, test_refcount(x))
1798    let x = v:true
1799    call assert_equal(-1, test_refcount(x))
1800    if has('float')
1801        let x = 0.1
1802        call assert_equal(-1, test_refcount(x))
1803    endif
1804
1805    " Check refcount
1806    let x = []
1807    call assert_equal(1, test_refcount(x))
1808
1809    let x = {}
1810    call assert_equal(1, x->test_refcount())
1811
1812    let x = 0zff
1813    call assert_equal(1, test_refcount(x))
1814
1815    let X = {-> line('.')}
1816    call assert_equal(1, test_refcount(X))
1817    let Y = X
1818    call assert_equal(2, test_refcount(X))
1819
1820    if has('job')
1821        let job = job_start([&shell, &shellcmdflag, 'echo .'])
1822        call assert_equal(1, test_refcount(job))
1823        call assert_equal(1, test_refcount(job_getchannel(job)))
1824        call assert_equal(1, test_refcount(job))
1825    endif
1826
1827    " Function arguments, copying and unassigning
1828    func ExprCheck(x, i)
1829        let i = a:i + 1
1830        call assert_equal(i, test_refcount(a:x))
1831        let Y = a:x
1832        call assert_equal(i + 1, test_refcount(a:x))
1833        call assert_equal(test_refcount(a:x), test_refcount(Y))
1834        let Y = 0
1835        call assert_equal(i, test_refcount(a:x))
1836    endfunc
1837    call ExprCheck([], 0)
1838    call ExprCheck({}, 0)
1839    call ExprCheck(0zff, 0)
1840    call ExprCheck({-> line('.')}, 0)
1841    if has('job')
1842	call ExprCheck(job, 1)
1843	call ExprCheck(job_getchannel(job), 1)
1844	call job_stop(job)
1845    endif
1846    delfunc ExprCheck
1847
1848    " Regarding function
1849    func Func(x) abort
1850        call assert_equal(2, test_refcount(function('Func')))
1851        call assert_equal(0, test_refcount(funcref('Func')))
1852    endfunc
1853    call assert_equal(1, test_refcount(function('Func')))
1854    call assert_equal(0, test_refcount(function('Func', [1])))
1855    call assert_equal(0, test_refcount(funcref('Func')))
1856    call assert_equal(0, test_refcount(funcref('Func', [1])))
1857    let X = function('Func')
1858    let Y = X
1859    call assert_equal(1, test_refcount(X))
1860    let X = function('Func', [1])
1861    let Y = X
1862    call assert_equal(2, test_refcount(X))
1863    let X = funcref('Func')
1864    let Y = X
1865    call assert_equal(2, test_refcount(X))
1866    let X = funcref('Func', [1])
1867    let Y = X
1868    call assert_equal(2, test_refcount(X))
1869    unlet X
1870    unlet Y
1871    call Func(1)
1872    delfunc Func
1873
1874    " Function with dict
1875    func DictFunc() dict
1876        call assert_equal(3, test_refcount(self))
1877    endfunc
1878    let d = {'Func': function('DictFunc')}
1879    call assert_equal(1, test_refcount(d))
1880    call assert_equal(0, test_refcount(d.Func))
1881    call d.Func()
1882    unlet d
1883    delfunc DictFunc
1884endfunc
1885
1886func Test_funccall_garbage_collect()
1887    func Func(x, ...)
1888        call add(a:x, a:000)
1889    endfunc
1890    call Func([], [])
1891    " Must not crash cause by invalid freeing
1892    call test_garbagecollect_now()
1893    call assert_true(v:true)
1894    delfunc Func
1895endfunc
1896
1897func Test_function_defined_line()
1898    CheckNotGui
1899
1900    let lines =<< trim [CODE]
1901    " F1
1902    func F1()
1903        " F2
1904        func F2()
1905            "
1906            "
1907            "
1908            return
1909        endfunc
1910        " F3
1911        execute "func F3()\n\n\n\nreturn\nendfunc"
1912        " F4
1913        execute "func F4()\n
1914                    \\n
1915                    \\n
1916                    \\n
1917                    \return\n
1918                    \endfunc"
1919    endfunc
1920    " F5
1921    execute "func F5()\n\n\n\nreturn\nendfunc"
1922    " F6
1923    execute "func F6()\n
1924                \\n
1925                \\n
1926                \\n
1927                \return\n
1928                \endfunc"
1929    call F1()
1930    verbose func F1
1931    verbose func F2
1932    verbose func F3
1933    verbose func F4
1934    verbose func F5
1935    verbose func F6
1936    qall!
1937    [CODE]
1938
1939    call writefile(lines, 'Xtest.vim')
1940    let res = system(GetVimCommandClean() .. ' -es -X -S Xtest.vim')
1941    call assert_equal(0, v:shell_error)
1942
1943    let m = matchstr(res, 'function F1()[^[:print:]]*[[:print:]]*')
1944    call assert_match(' line 2$', m)
1945
1946    let m = matchstr(res, 'function F2()[^[:print:]]*[[:print:]]*')
1947    call assert_match(' line 4$', m)
1948
1949    let m = matchstr(res, 'function F3()[^[:print:]]*[[:print:]]*')
1950    call assert_match(' line 11$', m)
1951
1952    let m = matchstr(res, 'function F4()[^[:print:]]*[[:print:]]*')
1953    call assert_match(' line 13$', m)
1954
1955    let m = matchstr(res, 'function F5()[^[:print:]]*[[:print:]]*')
1956    call assert_match(' line 21$', m)
1957
1958    let m = matchstr(res, 'function F6()[^[:print:]]*[[:print:]]*')
1959    call assert_match(' line 23$', m)
1960
1961    call delete('Xtest.vim')
1962endfunc
1963
1964"-------------------------------------------------------------------------------
1965" Modelines								    {{{1
1966" vim: ts=8 sw=2 sts=2 expandtab tw=80 fdm=marker
1967"-------------------------------------------------------------------------------
1968