================ @@ -0,0 +1,192 @@ +//===-- DILLexerTests.cpp --------------------------------------------===// +// +// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. +// See https://llvm.org/LICENSE.txt for license information. +// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception +// +//===----------------------------------------------------------------------===// + +#include "lldb/ValueObject/DILLexer.h" +#include "llvm/ADT/StringRef.h" +#include "llvm/Testing/Support/Error.h" +#include "gtest/gtest.h" +#include <string> + +using llvm::StringRef; + +std::vector<std::pair<lldb_private::dil::Token::Kind, std::string>> +ExtractTokenData(lldb_private::dil::DILLexer &lexer) { + std::vector<std::pair<lldb_private::dil::Token::Kind, std::string>> data; + if (lexer.NumLexedTokens() == 0) + return data; + + lexer.ResetTokenIdx(UINT_MAX); + do { + lexer.Advance(); + lldb_private::dil::Token tok = lexer.GetCurrentToken(); + data.push_back(std::make_pair(tok.GetKind(), tok.GetSpelling())); + } while (data.back().first != lldb_private::dil::Token::eof); + return data; +} + +TEST(DILLexerTests, SimpleTest) { + StringRef input_expr("simple_var"); + uint32_t tok_len = 10; + llvm::Expected<lldb_private::dil::DILLexer> maybe_lexer = + lldb_private::dil::DILLexer::Create(input_expr); + ASSERT_THAT_EXPECTED(maybe_lexer, llvm::Succeeded()); + lldb_private::dil::DILLexer lexer(*maybe_lexer); + lldb_private::dil::Token token = + lldb_private::dil::Token(lldb_private::dil::Token::unknown, "", 0); + EXPECT_EQ(token.GetKind(), lldb_private::dil::Token::unknown); + + lexer.Advance(); + token = lexer.GetCurrentToken(); + EXPECT_EQ(token.GetKind(), lldb_private::dil::Token::identifier); + EXPECT_EQ(token.GetSpelling(), "simple_var"); + EXPECT_EQ(token.GetSpelling().size(), tok_len); + lexer.Advance(); + token = lexer.GetCurrentToken(); + EXPECT_EQ(token.GetKind(), lldb_private::dil::Token::eof); +} + +TEST(DILLexerTests, TokenKindTest) { + StringRef input_expr("namespace"); + llvm::Expected<lldb_private::dil::DILLexer> maybe_lexer = + lldb_private::dil::DILLexer::Create(input_expr); + ASSERT_THAT_EXPECTED(maybe_lexer, llvm::Succeeded()); + lldb_private::dil::DILLexer lexer(*maybe_lexer); + lldb_private::dil::Token token = + lldb_private::dil::Token(lldb_private::dil::Token::unknown, "", 0); + lexer.Advance(); + token = lexer.GetCurrentToken(); + + EXPECT_TRUE(token.Is(lldb_private::dil::Token::identifier)); + EXPECT_FALSE(token.Is(lldb_private::dil::Token::l_paren)); + EXPECT_TRUE(token.IsOneOf(lldb_private::dil::Token::eof, + lldb_private::dil::Token::identifier)); + EXPECT_FALSE(token.IsOneOf( + lldb_private::dil::Token::l_paren, lldb_private::dil::Token::r_paren, + lldb_private::dil::Token::coloncolon, lldb_private::dil::Token::eof)); +} + +TEST(DILLexerTests, LookAheadTest) { + StringRef input_expr("(anonymous namespace)::some_var"); + llvm::Expected<lldb_private::dil::DILLexer> maybe_lexer = + lldb_private::dil::DILLexer::Create(input_expr); + ASSERT_THAT_EXPECTED(maybe_lexer, llvm::Succeeded()); + lldb_private::dil::DILLexer lexer(*maybe_lexer); + lldb_private::dil::Token token = + lldb_private::dil::Token(lldb_private::dil::Token::unknown, "", 0); + uint32_t expect_loc = 23; + lexer.Advance(); + token = lexer.GetCurrentToken(); + + // Current token is '('; check the next 4 tokens, to make + // sure they are the identifier 'anonymous', the identifier 'namespace' + // ')' and '::', in that order. + EXPECT_EQ(token.GetKind(), lldb_private::dil::Token::l_paren); + EXPECT_EQ(lexer.LookAhead(1).GetKind(), lldb_private::dil::Token::identifier); + EXPECT_EQ(lexer.LookAhead(1).GetSpelling(), "anonymous"); + EXPECT_EQ(lexer.LookAhead(2).GetKind(), lldb_private::dil::Token::identifier); + EXPECT_EQ(lexer.LookAhead(2).GetSpelling(), "namespace"); + EXPECT_EQ(lexer.LookAhead(3).GetKind(), lldb_private::dil::Token::r_paren); + EXPECT_EQ(lexer.LookAhead(4).GetKind(), lldb_private::dil::Token::coloncolon); + + // Our current index should still be 0, as we only looked ahead; we are still + // officially on the '('. + EXPECT_EQ(lexer.GetCurrentTokenIdx(), (uint32_t)0); + + // Accept the 'lookahead', so our current token is '::', which has the index + // 4 in our vector of tokens (which starts at zero). + lexer.Advance(4); + token = lexer.GetCurrentToken(); + EXPECT_EQ(token.GetKind(), lldb_private::dil::Token::coloncolon); + EXPECT_EQ(lexer.GetCurrentTokenIdx(), (uint32_t)4); + + lexer.Advance(); + token = lexer.GetCurrentToken(); + EXPECT_EQ(token.GetKind(), lldb_private::dil::Token::identifier); + EXPECT_EQ(token.GetSpelling(), "some_var"); + EXPECT_EQ(lexer.GetCurrentTokenIdx(), (uint32_t)5); + // Verify we've advanced our position counter (lexing location) in the + // input 23 characters (the length of '(anonymous namespace)::'. + EXPECT_EQ(token.GetLocation(), expect_loc); + + lexer.Advance(); + token = lexer.GetCurrentToken(); + EXPECT_EQ(token.GetKind(), lldb_private::dil::Token::eof); +} + +TEST(DILLexerTests, MultiTokenLexTest) { + StringRef input_expr("This string has (several ) ::identifiers"); + llvm::Expected<lldb_private::dil::DILLexer> maybe_lexer = + lldb_private::dil::DILLexer::Create(input_expr); + ASSERT_THAT_EXPECTED(maybe_lexer, llvm::Succeeded()); + lldb_private::dil::DILLexer lexer(*maybe_lexer); + lldb_private::dil::Token token = + lldb_private::dil::Token(lldb_private::dil::Token::unknown, "", 0); + + std::vector<std::pair<lldb_private::dil::Token::Kind, std::string>> + lexer_tokens_data = ExtractTokenData(lexer); + + EXPECT_THAT( + lexer_tokens_data, + testing::ElementsAre( + testing::Pair(lldb_private::dil::Token::identifier, "This"), + testing::Pair(lldb_private::dil::Token::identifier, "string"), + testing::Pair(lldb_private::dil::Token::identifier, "has"), + testing::Pair(lldb_private::dil::Token::l_paren, "("), + testing::Pair(lldb_private::dil::Token::identifier, "several"), + testing::Pair(lldb_private::dil::Token::r_paren, ")"), + testing::Pair(lldb_private::dil::Token::coloncolon, "::"), + testing::Pair(lldb_private::dil::Token::identifier, "identifiers"), + testing::Pair(lldb_private::dil::Token::eof, ""))); + lexer.Advance(); + token = lexer.GetCurrentToken(); + EXPECT_EQ(token.GetSpelling(), ""); + EXPECT_EQ(token.GetKind(), lldb_private::dil::Token::eof); +} + +TEST(DILLexerTests, IdentifiersTest) { + std::vector<std::string> valid_identifiers = { + "$My_name1", "$pc", "abcd", "ab cd", "_", "_a", "_a_", + "a_b", "this", "self", "a", "MyName", "namespace"}; + std::vector<std::string> invalid_identifiers = {"234", "2a", "2", + "$", "1MyName", ""}; + + // Verify that all of the valid identifiers come out as identifier tokens. + for (auto &str : valid_identifiers) { + SCOPED_TRACE(str); + llvm::Expected<lldb_private::dil::DILLexer> maybe_lexer = + lldb_private::dil::DILLexer::Create(str); + ASSERT_THAT_EXPECTED(maybe_lexer, llvm::Succeeded()); + lldb_private::dil::DILLexer lexer(*maybe_lexer); + lldb_private::dil::Token token = + lldb_private::dil::Token(lldb_private::dil::Token::unknown, "", 0); + lexer.Advance(); + token = lexer.GetCurrentToken(); + EXPECT_EQ(token.GetKind(), lldb_private::dil::Token::identifier); + } + + // Verify that none of the invalid identifiers come out as identifier tokens. + for (auto &str : invalid_identifiers) { + SCOPED_TRACE(str); + llvm::Expected<lldb_private::dil::DILLexer> maybe_lexer = + lldb_private::dil::DILLexer::Create(str); + if (!maybe_lexer) { ---------------- cmtice wrote:
I'm not sure what to do here. Right now, parsing '123' will cause the lexer to fail (in this version) because there is NO valid token type that it corresponds to (since we haven't added number lexing yet). Therefore the call to Create (or to ExtractTokenData) returns an error rather than a lexer (or a valid result). So I have to use the if-then-else control flow here; I can't just use EXPECT_THAT_EXPECTED... because in some cases I legitimately expect it to fail https://github.com/llvm/llvm-project/pull/123521 _______________________________________________ lldb-commits mailing list lldb-commits@lists.llvm.org https://lists.llvm.org/cgi-bin/mailman/listinfo/lldb-commits
