unittests/ASTMatchers/Dynamic/ParserTest.cpp - third_party/swift-clang - Git at Google

 //===- unittest/ASTMatchers/Dynamic/ParserTest.cpp - Parser unit tests -===//
 //
 //                     The LLVM Compiler Infrastructure
 //
 // This file is distributed under the University of Illinois Open Source
 // License. See LICENSE.TXT for details.
 //
 //===-------------------------------------------------------------------===//

 #include "../ASTMatchersTest.h"
 #include "clang/ASTMatchers/Dynamic/Parser.h"
 #include "clang/ASTMatchers/Dynamic/Registry.h"
 #include "llvm/ADT/Optional.h"
 #include "gtest/gtest.h"
 #include <string>
 #include <vector>

 namespace clang {
 namespace ast_matchers {
 namespace dynamic {
 namespace {

 class MockSema : public Parser::Sema {
 public:
   ~MockSema() override {}

   uint64_t expectMatcher(StringRef MatcherName) {
     // Optimizations on the matcher framework make simple matchers like
     // 'stmt()' to be all the same matcher.
     // Use a more complex expression to prevent that.
     ast_matchers::internal::Matcher<Stmt> M = stmt(stmt(), stmt());
     ExpectedMatchers.insert(std::make_pair(MatcherName, M));
     return M.getID().second;
   }

   void parse(StringRef Code) {
     Diagnostics Error;
     VariantValue Value;
     Parser::parseExpression(Code, this, &Value, &Error);
     Values.push_back(Value);
     Errors.push_back(Error.toStringFull());
   }

   llvm::Optional<MatcherCtor>
   lookupMatcherCtor(StringRef MatcherName) override {
     const ExpectedMatchersTy::value_type *Matcher =
         &*ExpectedMatchers.find(MatcherName);
     return reinterpret_cast<MatcherCtor>(Matcher);
   }

   VariantMatcher actOnMatcherExpression(MatcherCtor Ctor,
                                         SourceRange NameRange,
                                         StringRef BindID,
                                         ArrayRef<ParserValue> Args,
                                         Diagnostics *Error) override {
     const ExpectedMatchersTy::value_type *Matcher =
         reinterpret_cast<const ExpectedMatchersTy::value_type *>(Ctor);
     MatcherInfo ToStore = { Matcher->first, NameRange, Args, BindID };
     Matchers.push_back(ToStore);
     return VariantMatcher::SingleMatcher(Matcher->second);
   }

   struct MatcherInfo {
     StringRef MatcherName;
     SourceRange NameRange;
     std::vector<ParserValue> Args;
     std::string BoundID;
   };

   std::vector<std::string> Errors;
   std::vector<VariantValue> Values;
   std::vector<MatcherInfo> Matchers;
   typedef std::map<std::string, ast_matchers::internal::Matcher<Stmt> >
   ExpectedMatchersTy;
   ExpectedMatchersTy ExpectedMatchers;
 };

 TEST(ParserTest, ParseUnsigned) {
   MockSema Sema;
   Sema.parse("0");
   Sema.parse("123");
   Sema.parse("0x1f");
   Sema.parse("12345678901");
   Sema.parse("1a1");
   EXPECT_EQ(5U, Sema.Values.size());
   EXPECT_EQ(0U, Sema.Values[0].getUnsigned());
   EXPECT_EQ(123U, Sema.Values[1].getUnsigned());
   EXPECT_EQ(31U, Sema.Values[2].getUnsigned());
   EXPECT_EQ("1:1: Error parsing unsigned token: <12345678901>", Sema.Errors[3]);
   EXPECT_EQ("1:1: Error parsing unsigned token: <1a1>", Sema.Errors[4]);
 }

 TEST(ParserTest, ParseString) {
   MockSema Sema;
   Sema.parse("\"Foo\"");
   Sema.parse("\"\"");
   Sema.parse("\"Baz");
   EXPECT_EQ(3ULL, Sema.Values.size());
   EXPECT_EQ("Foo", Sema.Values[0].getString());
   EXPECT_EQ("", Sema.Values[1].getString());
   EXPECT_EQ("1:1: Error parsing string token: <\"Baz>", Sema.Errors[2]);
 }

 bool matchesRange(SourceRange Range, unsigned StartLine,
                   unsigned EndLine, unsigned StartColumn, unsigned EndColumn) {
   EXPECT_EQ(StartLine, Range.Start.Line);
   EXPECT_EQ(EndLine, Range.End.Line);
   EXPECT_EQ(StartColumn, Range.Start.Column);
   EXPECT_EQ(EndColumn, Range.End.Column);
   return Range.Start.Line == StartLine && Range.End.Line == EndLine &&
          Range.Start.Column == StartColumn && Range.End.Column == EndColumn;
 }

 llvm::Optional<DynTypedMatcher> getSingleMatcher(const VariantValue &Value) {
   llvm::Optional<DynTypedMatcher> Result =
       Value.getMatcher().getSingleMatcher();
   EXPECT_TRUE(Result.hasValue());
   return Result;
 }

 TEST(ParserTest, ParseMatcher) {
   MockSema Sema;
   const uint64_t ExpectedFoo = Sema.expectMatcher("Foo");
   const uint64_t ExpectedBar = Sema.expectMatcher("Bar");
   const uint64_t ExpectedBaz = Sema.expectMatcher("Baz");
   Sema.parse(" Foo ( Bar ( 17), Baz( \n \"B A,Z\") ) .bind( \"Yo!\") ");
   for (size_t i = 0, e = Sema.Errors.size(); i != e; ++i) {
     EXPECT_EQ("", Sema.Errors[i]);
   }

   EXPECT_NE(ExpectedFoo, ExpectedBar);
   EXPECT_NE(ExpectedFoo, ExpectedBaz);
   EXPECT_NE(ExpectedBar, ExpectedBaz);

   EXPECT_EQ(1ULL, Sema.Values.size());
   EXPECT_EQ(ExpectedFoo, getSingleMatcher(Sema.Values[0])->getID().second);

   EXPECT_EQ(3ULL, Sema.Matchers.size());
   const MockSema::MatcherInfo Bar = Sema.Matchers[0];
   EXPECT_EQ("Bar", Bar.MatcherName);
   EXPECT_TRUE(matchesRange(Bar.NameRange, 1, 1, 8, 17));
   EXPECT_EQ(1ULL, Bar.Args.size());
   EXPECT_EQ(17U, Bar.Args[0].Value.getUnsigned());

   const MockSema::MatcherInfo Baz = Sema.Matchers[1];
   EXPECT_EQ("Baz", Baz.MatcherName);
   EXPECT_TRUE(matchesRange(Baz.NameRange, 1, 2, 19, 10));
   EXPECT_EQ(1ULL, Baz.Args.size());
   EXPECT_EQ("B A,Z", Baz.Args[0].Value.getString());

   const MockSema::MatcherInfo Foo = Sema.Matchers[2];
   EXPECT_EQ("Foo", Foo.MatcherName);
   EXPECT_TRUE(matchesRange(Foo.NameRange, 1, 2, 2, 12));
   EXPECT_EQ(2ULL, Foo.Args.size());
   EXPECT_EQ(ExpectedBar, getSingleMatcher(Foo.Args[0].Value)->getID().second);
   EXPECT_EQ(ExpectedBaz, getSingleMatcher(Foo.Args[1].Value)->getID().second);
   EXPECT_EQ("Yo!", Foo.BoundID);
 }

 using ast_matchers::internal::Matcher;

 Parser::NamedValueMap getTestNamedValues() {
   Parser::NamedValueMap Values;
   Values["nameX"] = llvm::StringRef("x");
   Values["hasParamA"] =
       VariantMatcher::SingleMatcher(hasParameter(0, hasName("a")));
   return Values;
 }

 TEST(ParserTest, FullParserTest) {
   Diagnostics Error;
   llvm::Optional<DynTypedMatcher> VarDecl(Parser::parseMatcherExpression(
       "varDecl(hasInitializer(binaryOperator(hasLHS(integerLiteral()),"
       "                                      hasOperatorName(\"+\"))))",
       &Error));
   EXPECT_EQ("", Error.toStringFull());
   Matcher<Decl> M = VarDecl->unconditionalConvertTo<Decl>();
   EXPECT_TRUE(matches("int x = 1 + false;", M));
   EXPECT_FALSE(matches("int x = true + 1;", M));
   EXPECT_FALSE(matches("int x = 1 - false;", M));
   EXPECT_FALSE(matches("int x = true - 1;", M));

   llvm::Optional<DynTypedMatcher> HasParameter(Parser::parseMatcherExpression(
       "functionDecl(hasParameter(1, hasName(\"x\")))", &Error));
   EXPECT_EQ("", Error.toStringFull());
   M = HasParameter->unconditionalConvertTo<Decl>();

   EXPECT_TRUE(matches("void f(int a, int x);", M));
   EXPECT_FALSE(matches("void f(int x, int a);", M));

   // Test named values.
   auto NamedValues = getTestNamedValues();
   llvm::Optional<DynTypedMatcher> HasParameterWithNamedValues(
       Parser::parseMatcherExpression(
           "functionDecl(hasParamA, hasParameter(1, hasName(nameX)))",
           nullptr, &NamedValues, &Error));
   EXPECT_EQ("", Error.toStringFull());
   M = HasParameterWithNamedValues->unconditionalConvertTo<Decl>();

   EXPECT_TRUE(matches("void f(int a, int x);", M));
   EXPECT_FALSE(matches("void f(int x, int a);", M));


   EXPECT_TRUE(!Parser::parseMatcherExpression(
                    "hasInitializer(\n    binaryOperator(hasLHS(\"A\")))",
                    &Error).hasValue());
   EXPECT_EQ("1:1: Error parsing argument 1 for matcher hasInitializer.\n"
             "2:5: Error parsing argument 1 for matcher binaryOperator.\n"
             "2:20: Error building matcher hasLHS.\n"
             "2:27: Incorrect type for arg 1. "
             "(Expected = Matcher<Expr>) != (Actual = String)",
             Error.toStringFull());
 }

 std::string ParseWithError(StringRef Code) {
   Diagnostics Error;
   VariantValue Value;
   Parser::parseExpression(Code, &Value, &Error);
   return Error.toStringFull();
 }

 std::string ParseMatcherWithError(StringRef Code) {
   Diagnostics Error;
   Parser::parseMatcherExpression(Code, &Error);
   return Error.toStringFull();
 }

 TEST(ParserTest, Errors) {
   EXPECT_EQ(
       "1:5: Error parsing matcher. Found token <123> while looking for '('.",
       ParseWithError("Foo 123"));
   EXPECT_EQ(
       "1:1: Matcher not found: Foo\n"
       "1:9: Error parsing matcher. Found token <123> while looking for ','.",
       ParseWithError("Foo(\"A\" 123)"));
   EXPECT_EQ(
       "1:1: Error parsing argument 1 for matcher stmt.\n"
       "1:6: Value not found: someValue",
       ParseWithError("stmt(someValue)"));
   EXPECT_EQ(
       "1:1: Matcher not found: Foo\n"
       "1:4: Error parsing matcher. Found end-of-code while looking for ')'.",
       ParseWithError("Foo("));
   EXPECT_EQ("1:1: End of code found while looking for token.",
             ParseWithError(""));
   EXPECT_EQ("Input value is not a matcher expression.",
             ParseMatcherWithError("\"A\""));
   EXPECT_EQ("1:1: Matcher not found: Foo\n"
             "1:1: Error parsing argument 1 for matcher Foo.\n"
             "1:5: Invalid token <(> found when looking for a value.",
             ParseWithError("Foo(("));
   EXPECT_EQ("1:7: Expected end of code.", ParseWithError("expr()a"));
   EXPECT_EQ("1:11: Malformed bind() expression.",
             ParseWithError("isArrow().biind"));
   EXPECT_EQ("1:15: Malformed bind() expression.",
             ParseWithError("isArrow().bind"));
   EXPECT_EQ("1:16: Malformed bind() expression.",
             ParseWithError("isArrow().bind(foo"));
   EXPECT_EQ("1:21: Malformed bind() expression.",
             ParseWithError("isArrow().bind(\"foo\""));
   EXPECT_EQ("1:1: Error building matcher isArrow.\n"
             "1:1: Matcher does not support binding.",
             ParseWithError("isArrow().bind(\"foo\")"));
   EXPECT_EQ("Input value has unresolved overloaded type: "
             "Matcher<DoStmt|ForStmt|WhileStmt|CXXForRangeStmt|FunctionDecl>",
             ParseMatcherWithError("hasBody(stmt())"));
 }

 TEST(ParserTest, OverloadErrors) {
   EXPECT_EQ("1:1: Error building matcher callee.\n"
             "1:8: Candidate 1: Incorrect type for arg 1. "
             "(Expected = Matcher<Stmt>) != (Actual = String)\n"
             "1:8: Candidate 2: Incorrect type for arg 1. "
             "(Expected = Matcher<Decl>) != (Actual = String)",
             ParseWithError("callee(\"A\")"));
 }

 TEST(ParserTest, CompletionRegistry) {
   std::vector<MatcherCompletion> Comps =
       Parser::completeExpression("while", 5);
   ASSERT_EQ(1u, Comps.size());
   EXPECT_EQ("Stmt(", Comps[0].TypedText);
   EXPECT_EQ("Matcher<Stmt> whileStmt(Matcher<WhileStmt>...)",
             Comps[0].MatcherDecl);

   Comps = Parser::completeExpression("whileStmt().", 12);
   ASSERT_EQ(1u, Comps.size());
   EXPECT_EQ("bind(\"", Comps[0].TypedText);
   EXPECT_EQ("bind", Comps[0].MatcherDecl);
 }

 TEST(ParserTest, CompletionNamedValues) {
   // Can complete non-matcher types.
   auto NamedValues = getTestNamedValues();
   StringRef Code = "functionDecl(hasName(";
   std::vector<MatcherCompletion> Comps =
       Parser::completeExpression(Code, Code.size(), nullptr, &NamedValues);
   ASSERT_EQ(1u, Comps.size());
   EXPECT_EQ("nameX", Comps[0].TypedText);
   EXPECT_EQ("String nameX", Comps[0].MatcherDecl);

   // Can complete if there are names in the expression.
   Code = "cxxMethodDecl(hasName(nameX), ";
   Comps = Parser::completeExpression(Code, Code.size(), nullptr, &NamedValues);
   EXPECT_LT(0u, Comps.size());

   // Can complete names and registry together.
   Code = "cxxMethodDecl(hasP";
   Comps = Parser::completeExpression(Code, Code.size(), nullptr, &NamedValues);
   ASSERT_EQ(3u, Comps.size());
   EXPECT_EQ("aramA", Comps[0].TypedText);
   EXPECT_EQ("Matcher<FunctionDecl> hasParamA", Comps[0].MatcherDecl);

   EXPECT_EQ("arameter(", Comps[1].TypedText);
   EXPECT_EQ(
       "Matcher<FunctionDecl> hasParameter(unsigned, Matcher<ParmVarDecl>)",
       Comps[1].MatcherDecl);

   EXPECT_EQ("arent(", Comps[2].TypedText);
   EXPECT_EQ(
       "Matcher<Decl> "
       "hasParent(Matcher<NestedNameSpecifierLoc|TypeLoc|Decl|...>)",
       Comps[2].MatcherDecl);
 }

 }  // end anonymous namespace
 }  // end namespace dynamic
 }  // end namespace ast_matchers
 }  // end namespace clang
	//===- unittest/ASTMatchers/Dynamic/ParserTest.cpp - Parser unit tests -===//
	//
	// The LLVM Compiler Infrastructure
	//
	// This file is distributed under the University of Illinois Open Source
	// License. See LICENSE.TXT for details.
	//
	//===-------------------------------------------------------------------===//

	#include "../ASTMatchersTest.h"
	#include "clang/ASTMatchers/Dynamic/Parser.h"
	#include "clang/ASTMatchers/Dynamic/Registry.h"
	#include "llvm/ADT/Optional.h"
	#include "gtest/gtest.h"
	#include <string>
	#include <vector>

	namespace clang {
	namespace ast_matchers {
	namespace dynamic {
	namespace {

	class MockSema : public Parser::Sema {
	public:
	~MockSema() override {}

	uint64_t expectMatcher(StringRef MatcherName) {
	// Optimizations on the matcher framework make simple matchers like
	// 'stmt()' to be all the same matcher.
	// Use a more complex expression to prevent that.
	ast_matchers::internal::Matcher<Stmt> M = stmt(stmt(), stmt());
	ExpectedMatchers.insert(std::make_pair(MatcherName, M));
	return M.getID().second;
	}

	void parse(StringRef Code) {
	Diagnostics Error;
	VariantValue Value;
	Parser::parseExpression(Code, this, &Value, &Error);
	Values.push_back(Value);
	Errors.push_back(Error.toStringFull());
	}

	llvm::Optional<MatcherCtor>
	lookupMatcherCtor(StringRef MatcherName) override {
	const ExpectedMatchersTy::value_type *Matcher =
	&*ExpectedMatchers.find(MatcherName);
	return reinterpret_cast<MatcherCtor>(Matcher);
	}

	VariantMatcher actOnMatcherExpression(MatcherCtor Ctor,
	SourceRange NameRange,
	StringRef BindID,
	ArrayRef<ParserValue> Args,
	Diagnostics *Error) override {
	const ExpectedMatchersTy::value_type *Matcher =
	reinterpret_cast<const ExpectedMatchersTy::value_type *>(Ctor);
	MatcherInfo ToStore = { Matcher->first, NameRange, Args, BindID };
	Matchers.push_back(ToStore);
	return VariantMatcher::SingleMatcher(Matcher->second);
	}

	struct MatcherInfo {
	StringRef MatcherName;
	SourceRange NameRange;
	std::vector<ParserValue> Args;
	std::string BoundID;
	};

	std::vector<std::string> Errors;
	std::vector<VariantValue> Values;
	std::vector<MatcherInfo> Matchers;
	typedef std::map<std::string, ast_matchers::internal::Matcher<Stmt> >
	ExpectedMatchersTy;
	ExpectedMatchersTy ExpectedMatchers;
	};

	TEST(ParserTest, ParseUnsigned) {
	MockSema Sema;
	Sema.parse("0");
	Sema.parse("123");
	Sema.parse("0x1f");
	Sema.parse("12345678901");
	Sema.parse("1a1");
	EXPECT_EQ(5U, Sema.Values.size());
	EXPECT_EQ(0U, Sema.Values[0].getUnsigned());
	EXPECT_EQ(123U, Sema.Values[1].getUnsigned());
	EXPECT_EQ(31U, Sema.Values[2].getUnsigned());
	EXPECT_EQ("1:1: Error parsing unsigned token: <12345678901>", Sema.Errors[3]);
	EXPECT_EQ("1:1: Error parsing unsigned token: <1a1>", Sema.Errors[4]);
	}

	TEST(ParserTest, ParseString) {
	MockSema Sema;
	Sema.parse("\"Foo\"");
	Sema.parse("\"\"");
	Sema.parse("\"Baz");
	EXPECT_EQ(3ULL, Sema.Values.size());
	EXPECT_EQ("Foo", Sema.Values[0].getString());
	EXPECT_EQ("", Sema.Values[1].getString());
	EXPECT_EQ("1:1: Error parsing string token: <\"Baz>", Sema.Errors[2]);
	}

	bool matchesRange(SourceRange Range, unsigned StartLine,
	unsigned EndLine, unsigned StartColumn, unsigned EndColumn) {
	EXPECT_EQ(StartLine, Range.Start.Line);
	EXPECT_EQ(EndLine, Range.End.Line);
	EXPECT_EQ(StartColumn, Range.Start.Column);
	EXPECT_EQ(EndColumn, Range.End.Column);
	return Range.Start.Line == StartLine && Range.End.Line == EndLine &&
	Range.Start.Column == StartColumn && Range.End.Column == EndColumn;
	}

	llvm::Optional<DynTypedMatcher> getSingleMatcher(const VariantValue &Value) {
	llvm::Optional<DynTypedMatcher> Result =
	Value.getMatcher().getSingleMatcher();
	EXPECT_TRUE(Result.hasValue());
	return Result;
	}

	TEST(ParserTest, ParseMatcher) {
	MockSema Sema;
	const uint64_t ExpectedFoo = Sema.expectMatcher("Foo");
	const uint64_t ExpectedBar = Sema.expectMatcher("Bar");
	const uint64_t ExpectedBaz = Sema.expectMatcher("Baz");
	Sema.parse(" Foo ( Bar ( 17), Baz( \n \"B A,Z\") ) .bind( \"Yo!\") ");
	for (size_t i = 0, e = Sema.Errors.size(); i != e; ++i) {
	EXPECT_EQ("", Sema.Errors[i]);
	}

	EXPECT_NE(ExpectedFoo, ExpectedBar);
	EXPECT_NE(ExpectedFoo, ExpectedBaz);
	EXPECT_NE(ExpectedBar, ExpectedBaz);

	EXPECT_EQ(1ULL, Sema.Values.size());
	EXPECT_EQ(ExpectedFoo, getSingleMatcher(Sema.Values[0])->getID().second);

	EXPECT_EQ(3ULL, Sema.Matchers.size());
	const MockSema::MatcherInfo Bar = Sema.Matchers[0];
	EXPECT_EQ("Bar", Bar.MatcherName);
	EXPECT_TRUE(matchesRange(Bar.NameRange, 1, 1, 8, 17));
	EXPECT_EQ(1ULL, Bar.Args.size());
	EXPECT_EQ(17U, Bar.Args[0].Value.getUnsigned());

	const MockSema::MatcherInfo Baz = Sema.Matchers[1];
	EXPECT_EQ("Baz", Baz.MatcherName);
	EXPECT_TRUE(matchesRange(Baz.NameRange, 1, 2, 19, 10));
	EXPECT_EQ(1ULL, Baz.Args.size());
	EXPECT_EQ("B A,Z", Baz.Args[0].Value.getString());

	const MockSema::MatcherInfo Foo = Sema.Matchers[2];
	EXPECT_EQ("Foo", Foo.MatcherName);
	EXPECT_TRUE(matchesRange(Foo.NameRange, 1, 2, 2, 12));
	EXPECT_EQ(2ULL, Foo.Args.size());
	EXPECT_EQ(ExpectedBar, getSingleMatcher(Foo.Args[0].Value)->getID().second);
	EXPECT_EQ(ExpectedBaz, getSingleMatcher(Foo.Args[1].Value)->getID().second);
	EXPECT_EQ("Yo!", Foo.BoundID);
	}

	using ast_matchers::internal::Matcher;

	Parser::NamedValueMap getTestNamedValues() {
	Parser::NamedValueMap Values;
	Values["nameX"] = llvm::StringRef("x");
	Values["hasParamA"] =
	VariantMatcher::SingleMatcher(hasParameter(0, hasName("a")));
	return Values;
	}

	TEST(ParserTest, FullParserTest) {
	Diagnostics Error;
	llvm::Optional<DynTypedMatcher> VarDecl(Parser::parseMatcherExpression(
	"varDecl(hasInitializer(binaryOperator(hasLHS(integerLiteral()),"
	" hasOperatorName(\"+\"))))",
	&Error));
	EXPECT_EQ("", Error.toStringFull());
	Matcher<Decl> M = VarDecl->unconditionalConvertTo<Decl>();
	EXPECT_TRUE(matches("int x = 1 + false;", M));
	EXPECT_FALSE(matches("int x = true + 1;", M));
	EXPECT_FALSE(matches("int x = 1 - false;", M));
	EXPECT_FALSE(matches("int x = true - 1;", M));

	llvm::Optional<DynTypedMatcher> HasParameter(Parser::parseMatcherExpression(
	"functionDecl(hasParameter(1, hasName(\"x\")))", &Error));
	EXPECT_EQ("", Error.toStringFull());
	M = HasParameter->unconditionalConvertTo<Decl>();

	EXPECT_TRUE(matches("void f(int a, int x);", M));
	EXPECT_FALSE(matches("void f(int x, int a);", M));

	// Test named values.
	auto NamedValues = getTestNamedValues();
	llvm::Optional<DynTypedMatcher> HasParameterWithNamedValues(
	Parser::parseMatcherExpression(
	"functionDecl(hasParamA, hasParameter(1, hasName(nameX)))",
	nullptr, &NamedValues, &Error));
	EXPECT_EQ("", Error.toStringFull());
	M = HasParameterWithNamedValues->unconditionalConvertTo<Decl>();

	EXPECT_TRUE(matches("void f(int a, int x);", M));
	EXPECT_FALSE(matches("void f(int x, int a);", M));


	EXPECT_TRUE(!Parser::parseMatcherExpression(
	"hasInitializer(\n binaryOperator(hasLHS(\"A\")))",
	&Error).hasValue());
	EXPECT_EQ("1:1: Error parsing argument 1 for matcher hasInitializer.\n"
	"2:5: Error parsing argument 1 for matcher binaryOperator.\n"
	"2:20: Error building matcher hasLHS.\n"
	"2:27: Incorrect type for arg 1. "
	"(Expected = Matcher<Expr>) != (Actual = String)",
	Error.toStringFull());
	}

	std::string ParseWithError(StringRef Code) {
	Diagnostics Error;
	VariantValue Value;
	Parser::parseExpression(Code, &Value, &Error);
	return Error.toStringFull();
	}

	std::string ParseMatcherWithError(StringRef Code) {
	Diagnostics Error;
	Parser::parseMatcherExpression(Code, &Error);
	return Error.toStringFull();
	}

	TEST(ParserTest, Errors) {
	EXPECT_EQ(
	"1:5: Error parsing matcher. Found token <123> while looking for '('.",
	ParseWithError("Foo 123"));
	EXPECT_EQ(
	"1:1: Matcher not found: Foo\n"
	"1:9: Error parsing matcher. Found token <123> while looking for ','.",
	ParseWithError("Foo(\"A\" 123)"));
	EXPECT_EQ(
	"1:1: Error parsing argument 1 for matcher stmt.\n"
	"1:6: Value not found: someValue",
	ParseWithError("stmt(someValue)"));
	EXPECT_EQ(
	"1:1: Matcher not found: Foo\n"
	"1:4: Error parsing matcher. Found end-of-code while looking for ')'.",
	ParseWithError("Foo("));
	EXPECT_EQ("1:1: End of code found while looking for token.",
	ParseWithError(""));
	EXPECT_EQ("Input value is not a matcher expression.",
	ParseMatcherWithError("\"A\""));
	EXPECT_EQ("1:1: Matcher not found: Foo\n"
	"1:1: Error parsing argument 1 for matcher Foo.\n"
	"1:5: Invalid token <(> found when looking for a value.",
	ParseWithError("Foo(("));
	EXPECT_EQ("1:7: Expected end of code.", ParseWithError("expr()a"));
	EXPECT_EQ("1:11: Malformed bind() expression.",
	ParseWithError("isArrow().biind"));
	EXPECT_EQ("1:15: Malformed bind() expression.",
	ParseWithError("isArrow().bind"));
	EXPECT_EQ("1:16: Malformed bind() expression.",
	ParseWithError("isArrow().bind(foo"));
	EXPECT_EQ("1:21: Malformed bind() expression.",
	ParseWithError("isArrow().bind(\"foo\""));
	EXPECT_EQ("1:1: Error building matcher isArrow.\n"
	"1:1: Matcher does not support binding.",
	ParseWithError("isArrow().bind(\"foo\")"));
	EXPECT_EQ("Input value has unresolved overloaded type: "
	"Matcher<DoStmt\|ForStmt\|WhileStmt\|CXXForRangeStmt\|FunctionDecl>",
	ParseMatcherWithError("hasBody(stmt())"));
	}

	TEST(ParserTest, OverloadErrors) {
	EXPECT_EQ("1:1: Error building matcher callee.\n"
	"1:8: Candidate 1: Incorrect type for arg 1. "
	"(Expected = Matcher<Stmt>) != (Actual = String)\n"
	"1:8: Candidate 2: Incorrect type for arg 1. "
	"(Expected = Matcher<Decl>) != (Actual = String)",
	ParseWithError("callee(\"A\")"));
	}

	TEST(ParserTest, CompletionRegistry) {
	std::vector<MatcherCompletion> Comps =
	Parser::completeExpression("while", 5);
	ASSERT_EQ(1u, Comps.size());
	EXPECT_EQ("Stmt(", Comps[0].TypedText);
	EXPECT_EQ("Matcher<Stmt> whileStmt(Matcher<WhileStmt>...)",
	Comps[0].MatcherDecl);

	Comps = Parser::completeExpression("whileStmt().", 12);
	ASSERT_EQ(1u, Comps.size());
	EXPECT_EQ("bind(\"", Comps[0].TypedText);
	EXPECT_EQ("bind", Comps[0].MatcherDecl);
	}

	TEST(ParserTest, CompletionNamedValues) {
	// Can complete non-matcher types.
	auto NamedValues = getTestNamedValues();
	StringRef Code = "functionDecl(hasName(";
	std::vector<MatcherCompletion> Comps =
	Parser::completeExpression(Code, Code.size(), nullptr, &NamedValues);
	ASSERT_EQ(1u, Comps.size());
	EXPECT_EQ("nameX", Comps[0].TypedText);
	EXPECT_EQ("String nameX", Comps[0].MatcherDecl);

	// Can complete if there are names in the expression.
	Code = "cxxMethodDecl(hasName(nameX), ";
	Comps = Parser::completeExpression(Code, Code.size(), nullptr, &NamedValues);
	EXPECT_LT(0u, Comps.size());

	// Can complete names and registry together.
	Code = "cxxMethodDecl(hasP";
	Comps = Parser::completeExpression(Code, Code.size(), nullptr, &NamedValues);
	ASSERT_EQ(3u, Comps.size());
	EXPECT_EQ("aramA", Comps[0].TypedText);
	EXPECT_EQ("Matcher<FunctionDecl> hasParamA", Comps[0].MatcherDecl);

	EXPECT_EQ("arameter(", Comps[1].TypedText);
	EXPECT_EQ(
	"Matcher<FunctionDecl> hasParameter(unsigned, Matcher<ParmVarDecl>)",
	Comps[1].MatcherDecl);

	EXPECT_EQ("arent(", Comps[2].TypedText);
	EXPECT_EQ(
	"Matcher<Decl> "
	"hasParent(Matcher<NestedNameSpecifierLoc\|TypeLoc\|Decl\|...>)",
	Comps[2].MatcherDecl);
	}

	} // end anonymous namespace
	} // end namespace dynamic
	} // end namespace ast_matchers
	} // end namespace clang