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// Copyright (c) 2013 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "testing/gtest/include/gtest/gtest.h"
#include "tools/gn/input_file.h"
#include "tools/gn/token.h"
#include "tools/gn/tokenizer.h"
namespace {
struct TokenExpectation {
Token::Type type;
const char* value;
};
template<size_t len>
bool CheckTokenizer(const char* input, const TokenExpectation (&expect)[len]) {
InputFile input_file(SourceFile("/test"));
input_file.SetContents(input);
Err err;
std::vector<Token> results = Tokenizer::Tokenize(&input_file, &err);
if (results.size() != len)
return false;
for (size_t i = 0; i < len; i++) {
if (expect[i].type != results[i].type())
return false;
if (expect[i].value != results[i].value())
return false;
}
return true;
}
} // namespace
TEST(Tokenizer, Empty) {
InputFile empty_string_input(SourceFile("/test"));
empty_string_input.SetContents("");
Err err;
std::vector<Token> results = Tokenizer::Tokenize(&empty_string_input, &err);
EXPECT_TRUE(results.empty());
InputFile whitespace_input(SourceFile("/test"));
whitespace_input.SetContents(" \r \n \r\n");
results = Tokenizer::Tokenize(&whitespace_input, &err);
EXPECT_TRUE(results.empty());
}
TEST(Tokenizer, Identifier) {
TokenExpectation one_ident[] = {
{ Token::IDENTIFIER, "foo" }
};
EXPECT_TRUE(CheckTokenizer(" foo ", one_ident));
}
TEST(Tokenizer, Integer) {
TokenExpectation integers[] = {
{ Token::INTEGER, "123" },
{ Token::INTEGER, "-123" }
};
EXPECT_TRUE(CheckTokenizer(" 123 -123 ", integers));
}
TEST(Tokenizer, IntegerNoSpace) {
TokenExpectation integers[] = {
{ Token::INTEGER, "123" },
{ Token::INTEGER, "-123" }
};
EXPECT_TRUE(CheckTokenizer(" 123-123 ", integers));
}
TEST(Tokenizer, String) {
TokenExpectation strings[] = {
{ Token::STRING, "\"foo\"" },
{ Token::STRING, "\"bar\\\"baz\"" },
{ Token::STRING, "\"asdf\\\\\"" }
};
EXPECT_TRUE(CheckTokenizer(" \"foo\" \"bar\\\"baz\" \"asdf\\\\\" ",
strings));
}
TEST(Tokenizer, Operator) {
TokenExpectation operators[] = {
{ Token::MINUS, "-" },
{ Token::PLUS, "+" },
{ Token::EQUAL, "=" },
{ Token::PLUS_EQUALS, "+=" },
{ Token::MINUS_EQUALS, "-=" },
{ Token::NOT_EQUAL, "!=" },
{ Token::EQUAL_EQUAL, "==" },
{ Token::LESS_THAN, "<" },
{ Token::GREATER_THAN, ">" },
{ Token::LESS_EQUAL, "<=" },
{ Token::GREATER_EQUAL, ">=" },
{ Token::BANG, "!" },
{ Token::BOOLEAN_OR, "||" },
{ Token::BOOLEAN_AND, "&&" },
{ Token::DOT, "." },
{ Token::COMMA, "," },
};
EXPECT_TRUE(CheckTokenizer("- + = += -= != == < > <= >= ! || && . ,",
operators));
}
TEST(Tokenizer, Scoper) {
TokenExpectation scopers[] = {
{ Token::LEFT_BRACE, "{" },
{ Token::LEFT_BRACKET, "[" },
{ Token::RIGHT_BRACKET, "]" },
{ Token::RIGHT_BRACE, "}" },
{ Token::LEFT_PAREN, "(" },
{ Token::RIGHT_PAREN, ")" },
};
EXPECT_TRUE(CheckTokenizer("{[ ]} ()", scopers));
}
TEST(Tokenizer, FunctionCall) {
TokenExpectation fn[] = {
{ Token::IDENTIFIER, "fun" },
{ Token::LEFT_PAREN, "(" },
{ Token::STRING, "\"foo\"" },
{ Token::RIGHT_PAREN, ")" },
{ Token::LEFT_BRACE, "{" },
{ Token::IDENTIFIER, "foo" },
{ Token::EQUAL, "=" },
{ Token::INTEGER, "12" },
{ Token::RIGHT_BRACE, "}" },
};
EXPECT_TRUE(CheckTokenizer("fun(\"foo\") {\nfoo = 12}", fn));
}
TEST(Tokenizer, Locations) {
InputFile input(SourceFile("/test"));
input.SetContents("1 2 \"three\"\n 4");
Err err;
std::vector<Token> results = Tokenizer::Tokenize(&input, &err);
ASSERT_EQ(4u, results.size());
ASSERT_TRUE(results[0].location() == Location(&input, 1, 1));
ASSERT_TRUE(results[1].location() == Location(&input, 1, 3));
ASSERT_TRUE(results[2].location() == Location(&input, 1, 5));
ASSERT_TRUE(results[3].location() == Location(&input, 2, 3));
}
TEST(Tokenizer, ByteOffsetOfNthLine) {
EXPECT_EQ(0u, Tokenizer::ByteOffsetOfNthLine("foo", 1));
// Windows and Posix have different line endings, so check the byte at the
// location rather than the offset.
char input1[] = "aaa\nxaa\n\nya";
EXPECT_EQ('x', input1[Tokenizer::ByteOffsetOfNthLine(input1, 2)]);
EXPECT_EQ('y', input1[Tokenizer::ByteOffsetOfNthLine(input1, 4)]);
char input2[3];
input2[0] = 'a';
input2[1] = '\n'; // Manually set to avoid Windows double-byte endings.
input2[2] = 0;
EXPECT_EQ(0u, Tokenizer::ByteOffsetOfNthLine(input2, 1));
EXPECT_EQ(2u, Tokenizer::ByteOffsetOfNthLine(input2, 2));
}
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