================
@@ -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);
----------------
labath wrote:
you might just say `strlen("(anonymous namespace)::")` and skip the constant
and the comment (this is a test, so it doesn't have to be super-efficient)
https://github.com/llvm/llvm-project/pull/123521
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