1 //===- unittest/ASTMatchers/Dynamic/ParserTest.cpp - Parser unit tests -===//
2 //
3 //                     The LLVM Compiler Infrastructure
4 //
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
7 //
8 //===-------------------------------------------------------------------===//
9 
10 #include "../ASTMatchersTest.h"
11 #include "clang/ASTMatchers/Dynamic/Parser.h"
12 #include "clang/ASTMatchers/Dynamic/Registry.h"
13 #include "llvm/ADT/Optional.h"
14 #include "llvm/ADT/StringMap.h"
15 #include "gtest/gtest.h"
16 #include <string>
17 #include <vector>
18 
19 namespace clang {
20 namespace ast_matchers {
21 namespace dynamic {
22 namespace {
23 
24 class MockSema : public Parser::Sema {
25 public:
26   virtual ~MockSema() {}
27 
28   uint64_t expectMatcher(StringRef MatcherName) {
29     ast_matchers::internal::Matcher<Stmt> M = stmt();
30     ExpectedMatchers.insert(std::make_pair(MatcherName, M));
31     return M.getID();
32   }
33 
34   void parse(StringRef Code) {
35     Diagnostics Error;
36     VariantValue Value;
37     Parser::parseExpression(Code, this, &Value, &Error);
38     Values.push_back(Value);
39     Errors.push_back(Error.toStringFull());
40   }
41 
42   llvm::Optional<MatcherCtor> lookupMatcherCtor(StringRef MatcherName) {
43     const ExpectedMatchersTy::value_type *Matcher =
44         &*ExpectedMatchers.find(MatcherName);
45     return reinterpret_cast<MatcherCtor>(Matcher);
46   }
47 
48   VariantMatcher actOnMatcherExpression(MatcherCtor Ctor,
49                                         const SourceRange &NameRange,
50                                         StringRef BindID,
51                                         ArrayRef<ParserValue> Args,
52                                         Diagnostics *Error) {
53     const ExpectedMatchersTy::value_type *Matcher =
54         reinterpret_cast<const ExpectedMatchersTy::value_type *>(Ctor);
55     MatcherInfo ToStore = { Matcher->first, NameRange, Args, BindID };
56     Matchers.push_back(ToStore);
57     return VariantMatcher::SingleMatcher(Matcher->second);
58   }
59 
60   struct MatcherInfo {
61     StringRef MatcherName;
62     SourceRange NameRange;
63     std::vector<ParserValue> Args;
64     std::string BoundID;
65   };
66 
67   std::vector<std::string> Errors;
68   std::vector<VariantValue> Values;
69   std::vector<MatcherInfo> Matchers;
70   typedef std::map<std::string, ast_matchers::internal::Matcher<Stmt> >
71   ExpectedMatchersTy;
72   ExpectedMatchersTy ExpectedMatchers;
73 };
74 
75 TEST(ParserTest, ParseUnsigned) {
76   MockSema Sema;
77   Sema.parse("0");
78   Sema.parse("123");
79   Sema.parse("0x1f");
80   Sema.parse("12345678901");
81   Sema.parse("1a1");
82   EXPECT_EQ(5U, Sema.Values.size());
83   EXPECT_EQ(0U, Sema.Values[0].getUnsigned());
84   EXPECT_EQ(123U, Sema.Values[1].getUnsigned());
85   EXPECT_EQ(31U, Sema.Values[2].getUnsigned());
86   EXPECT_EQ("1:1: Error parsing unsigned token: <12345678901>", Sema.Errors[3]);
87   EXPECT_EQ("1:1: Error parsing unsigned token: <1a1>", Sema.Errors[4]);
88 }
89 
90 TEST(ParserTest, ParseString) {
91   MockSema Sema;
92   Sema.parse("\"Foo\"");
93   Sema.parse("\"\"");
94   Sema.parse("\"Baz");
95   EXPECT_EQ(3ULL, Sema.Values.size());
96   EXPECT_EQ("Foo", Sema.Values[0].getString());
97   EXPECT_EQ("", Sema.Values[1].getString());
98   EXPECT_EQ("1:1: Error parsing string token: <\"Baz>", Sema.Errors[2]);
99 }
100 
101 bool matchesRange(const SourceRange &Range, unsigned StartLine,
102                   unsigned EndLine, unsigned StartColumn, unsigned EndColumn) {
103   EXPECT_EQ(StartLine, Range.Start.Line);
104   EXPECT_EQ(EndLine, Range.End.Line);
105   EXPECT_EQ(StartColumn, Range.Start.Column);
106   EXPECT_EQ(EndColumn, Range.End.Column);
107   return Range.Start.Line == StartLine && Range.End.Line == EndLine &&
108          Range.Start.Column == StartColumn && Range.End.Column == EndColumn;
109 }
110 
111 llvm::Optional<DynTypedMatcher> getSingleMatcher(const VariantValue &Value) {
112   llvm::Optional<DynTypedMatcher> Result =
113       Value.getMatcher().getSingleMatcher();
114   EXPECT_TRUE(Result.hasValue());
115   return Result;
116 }
117 
118 TEST(ParserTest, ParseMatcher) {
119   MockSema Sema;
120   const uint64_t ExpectedFoo = Sema.expectMatcher("Foo");
121   const uint64_t ExpectedBar = Sema.expectMatcher("Bar");
122   const uint64_t ExpectedBaz = Sema.expectMatcher("Baz");
123   Sema.parse(" Foo ( Bar ( 17), Baz( \n \"B A,Z\") ) .bind( \"Yo!\") ");
124   for (size_t i = 0, e = Sema.Errors.size(); i != e; ++i) {
125     EXPECT_EQ("", Sema.Errors[i]);
126   }
127 
128   EXPECT_EQ(1ULL, Sema.Values.size());
129   EXPECT_EQ(ExpectedFoo, getSingleMatcher(Sema.Values[0])->getID());
130 
131   EXPECT_EQ(3ULL, Sema.Matchers.size());
132   const MockSema::MatcherInfo Bar = Sema.Matchers[0];
133   EXPECT_EQ("Bar", Bar.MatcherName);
134   EXPECT_TRUE(matchesRange(Bar.NameRange, 1, 1, 8, 17));
135   EXPECT_EQ(1ULL, Bar.Args.size());
136   EXPECT_EQ(17U, Bar.Args[0].Value.getUnsigned());
137 
138   const MockSema::MatcherInfo Baz = Sema.Matchers[1];
139   EXPECT_EQ("Baz", Baz.MatcherName);
140   EXPECT_TRUE(matchesRange(Baz.NameRange, 1, 2, 19, 10));
141   EXPECT_EQ(1ULL, Baz.Args.size());
142   EXPECT_EQ("B A,Z", Baz.Args[0].Value.getString());
143 
144   const MockSema::MatcherInfo Foo = Sema.Matchers[2];
145   EXPECT_EQ("Foo", Foo.MatcherName);
146   EXPECT_TRUE(matchesRange(Foo.NameRange, 1, 2, 2, 12));
147   EXPECT_EQ(2ULL, Foo.Args.size());
148   EXPECT_EQ(ExpectedBar, getSingleMatcher(Foo.Args[0].Value)->getID());
149   EXPECT_EQ(ExpectedBaz, getSingleMatcher(Foo.Args[1].Value)->getID());
150   EXPECT_EQ("Yo!", Foo.BoundID);
151 }
152 
153 using ast_matchers::internal::Matcher;
154 
155 Parser::NamedValueMap getTestNamedValues() {
156   Parser::NamedValueMap Values;
157   Values["nameX"] = std::string("x");
158   Values["hasParamA"] =
159       VariantMatcher::SingleMatcher(hasParameter(0, hasName("a")));
160   return Values;
161 }
162 
163 TEST(ParserTest, FullParserTest) {
164   Diagnostics Error;
165   llvm::Optional<DynTypedMatcher> VarDecl(Parser::parseMatcherExpression(
166       "varDecl(hasInitializer(binaryOperator(hasLHS(integerLiteral()),"
167       "                                      hasOperatorName(\"+\"))))",
168       &Error));
169   EXPECT_EQ("", Error.toStringFull());
170   Matcher<Decl> M = VarDecl->unconditionalConvertTo<Decl>();
171   EXPECT_TRUE(matches("int x = 1 + false;", M));
172   EXPECT_FALSE(matches("int x = true + 1;", M));
173   EXPECT_FALSE(matches("int x = 1 - false;", M));
174   EXPECT_FALSE(matches("int x = true - 1;", M));
175 
176   llvm::Optional<DynTypedMatcher> HasParameter(Parser::parseMatcherExpression(
177       "functionDecl(hasParameter(1, hasName(\"x\")))", &Error));
178   EXPECT_EQ("", Error.toStringFull());
179   M = HasParameter->unconditionalConvertTo<Decl>();
180 
181   EXPECT_TRUE(matches("void f(int a, int x);", M));
182   EXPECT_FALSE(matches("void f(int x, int a);", M));
183 
184   // Test named values.
185   auto NamedValues = getTestNamedValues();
186   llvm::Optional<DynTypedMatcher> HasParameterWithNamedValues(
187       Parser::parseMatcherExpression(
188           "functionDecl(hasParamA, hasParameter(1, hasName(nameX)))",
189           nullptr, &NamedValues, &Error));
190   EXPECT_EQ("", Error.toStringFull());
191   M = HasParameterWithNamedValues->unconditionalConvertTo<Decl>();
192 
193   EXPECT_TRUE(matches("void f(int a, int x);", M));
194   EXPECT_FALSE(matches("void f(int x, int a);", M));
195 
196 
197   EXPECT_TRUE(!Parser::parseMatcherExpression(
198                    "hasInitializer(\n    binaryOperator(hasLHS(\"A\")))",
199                    &Error).hasValue());
200   EXPECT_EQ("1:1: Error parsing argument 1 for matcher hasInitializer.\n"
201             "2:5: Error parsing argument 1 for matcher binaryOperator.\n"
202             "2:20: Error building matcher hasLHS.\n"
203             "2:27: Incorrect type for arg 1. "
204             "(Expected = Matcher<Expr>) != (Actual = String)",
205             Error.toStringFull());
206 }
207 
208 std::string ParseWithError(StringRef Code) {
209   Diagnostics Error;
210   VariantValue Value;
211   Parser::parseExpression(Code, &Value, &Error);
212   return Error.toStringFull();
213 }
214 
215 std::string ParseMatcherWithError(StringRef Code) {
216   Diagnostics Error;
217   Parser::parseMatcherExpression(Code, &Error);
218   return Error.toStringFull();
219 }
220 
221 TEST(ParserTest, Errors) {
222   EXPECT_EQ(
223       "1:5: Error parsing matcher. Found token <123> while looking for '('.",
224       ParseWithError("Foo 123"));
225   EXPECT_EQ(
226       "1:1: Matcher not found: Foo\n"
227       "1:9: Error parsing matcher. Found token <123> while looking for ','.",
228       ParseWithError("Foo(\"A\" 123)"));
229   EXPECT_EQ(
230       "1:1: Error parsing argument 1 for matcher stmt.\n"
231       "1:6: Value not found: someValue",
232       ParseWithError("stmt(someValue)"));
233   EXPECT_EQ(
234       "1:1: Matcher not found: Foo\n"
235       "1:4: Error parsing matcher. Found end-of-code while looking for ')'.",
236       ParseWithError("Foo("));
237   EXPECT_EQ("1:1: End of code found while looking for token.",
238             ParseWithError(""));
239   EXPECT_EQ("Input value is not a matcher expression.",
240             ParseMatcherWithError("\"A\""));
241   EXPECT_EQ("1:1: Matcher not found: Foo\n"
242             "1:1: Error parsing argument 1 for matcher Foo.\n"
243             "1:5: Invalid token <(> found when looking for a value.",
244             ParseWithError("Foo(("));
245   EXPECT_EQ("1:7: Expected end of code.", ParseWithError("expr()a"));
246   EXPECT_EQ("1:11: Malformed bind() expression.",
247             ParseWithError("isArrow().biind"));
248   EXPECT_EQ("1:15: Malformed bind() expression.",
249             ParseWithError("isArrow().bind"));
250   EXPECT_EQ("1:16: Malformed bind() expression.",
251             ParseWithError("isArrow().bind(foo"));
252   EXPECT_EQ("1:21: Malformed bind() expression.",
253             ParseWithError("isArrow().bind(\"foo\""));
254   EXPECT_EQ("1:1: Error building matcher isArrow.\n"
255             "1:1: Matcher does not support binding.",
256             ParseWithError("isArrow().bind(\"foo\")"));
257   EXPECT_EQ("Input value has unresolved overloaded type: "
258             "Matcher<DoStmt|ForStmt|WhileStmt|CXXForRangeStmt>",
259             ParseMatcherWithError("hasBody(stmt())"));
260 }
261 
262 TEST(ParserTest, OverloadErrors) {
263   EXPECT_EQ("1:1: Error building matcher callee.\n"
264             "1:8: Candidate 1: Incorrect type for arg 1. "
265             "(Expected = Matcher<Stmt>) != (Actual = String)\n"
266             "1:8: Candidate 2: Incorrect type for arg 1. "
267             "(Expected = Matcher<Decl>) != (Actual = String)",
268             ParseWithError("callee(\"A\")"));
269 }
270 
271 TEST(ParserTest, CompletionRegistry) {
272   std::vector<MatcherCompletion> Comps =
273       Parser::completeExpression("while", 5);
274   ASSERT_EQ(1u, Comps.size());
275   EXPECT_EQ("Stmt(", Comps[0].TypedText);
276   EXPECT_EQ("Matcher<Stmt> whileStmt(Matcher<WhileStmt>...)",
277             Comps[0].MatcherDecl);
278 
279   Comps = Parser::completeExpression("whileStmt().", 12);
280   ASSERT_EQ(1u, Comps.size());
281   EXPECT_EQ("bind(\"", Comps[0].TypedText);
282   EXPECT_EQ("bind", Comps[0].MatcherDecl);
283 }
284 
285 TEST(ParserTest, CompletionNamedValues) {
286   // Can complete non-matcher types.
287   auto NamedValues = getTestNamedValues();
288   StringRef Code = "functionDecl(hasName(";
289   std::vector<MatcherCompletion> Comps =
290       Parser::completeExpression(Code, Code.size(), nullptr, &NamedValues);
291   ASSERT_EQ(1u, Comps.size());
292   EXPECT_EQ("nameX", Comps[0].TypedText);
293   EXPECT_EQ("String nameX", Comps[0].MatcherDecl);
294 
295   // Can complete if there are names in the expression.
296   Code = "methodDecl(hasName(nameX), ";
297   Comps = Parser::completeExpression(Code, Code.size(), nullptr, &NamedValues);
298   EXPECT_LT(0u, Comps.size());
299 
300   // Can complete names and registry together.
301   Code = "methodDecl(hasP";
302   Comps = Parser::completeExpression(Code, Code.size(), nullptr, &NamedValues);
303   ASSERT_EQ(3u, Comps.size());
304   EXPECT_EQ("aramA", Comps[0].TypedText);
305   EXPECT_EQ("Matcher<FunctionDecl> hasParamA", Comps[0].MatcherDecl);
306 
307   EXPECT_EQ("arameter(", Comps[1].TypedText);
308   EXPECT_EQ(
309       "Matcher<FunctionDecl> hasParameter(unsigned, Matcher<ParmVarDecl>)",
310       Comps[1].MatcherDecl);
311 
312   EXPECT_EQ("arent(", Comps[2].TypedText);
313   EXPECT_EQ("Matcher<Decl> hasParent(Matcher<Decl|Stmt>)",
314             Comps[2].MatcherDecl);
315 }
316 
317 }  // end anonymous namespace
318 }  // end namespace dynamic
319 }  // end namespace ast_matchers
320 }  // end namespace clang
321