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// Copyright 2011 Google Inc. All Rights Reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#include "lexer.h"
#include <gtest/gtest.h>
#include "eval_env.h"
TEST(Lexer, ReadVarValue) {
Lexer lexer("plain text $var $VaR ${x}\n");
EvalString eval;
string err;
EXPECT_TRUE(lexer.ReadVarValue(&eval, &err));
EXPECT_EQ("", err);
EXPECT_EQ("[plain text ][$var][ ][$VaR][ ][$x]",
eval.Serialize());
}
TEST(Lexer, ReadEvalStringEscapes) {
Lexer lexer("$ $$ab c$: $\ncde\n");
EvalString eval;
string err;
EXPECT_TRUE(lexer.ReadVarValue(&eval, &err));
EXPECT_EQ("", err);
EXPECT_EQ("[ $ab c: cde]",
eval.Serialize());
}
TEST(Lexer, ReadIdent) {
Lexer lexer("foo baR baz_123 foo-bar");
string ident;
EXPECT_TRUE(lexer.ReadIdent(&ident));
EXPECT_EQ("foo", ident);
EXPECT_TRUE(lexer.ReadIdent(&ident));
EXPECT_EQ("baR", ident);
EXPECT_TRUE(lexer.ReadIdent(&ident));
EXPECT_EQ("baz_123", ident);
EXPECT_TRUE(lexer.ReadIdent(&ident));
EXPECT_EQ("foo-bar", ident);
}
TEST(Lexer, ReadIdentCurlies) {
// Verify that ReadIdent includes dots in the name,
// but in an expansion $bar.dots stops at the dot.
Lexer lexer("foo.dots $bar.dots ${bar.dots}\n");
string ident;
EXPECT_TRUE(lexer.ReadIdent(&ident));
EXPECT_EQ("foo.dots", ident);
EvalString eval;
string err;
EXPECT_TRUE(lexer.ReadVarValue(&eval, &err));
EXPECT_EQ("", err);
EXPECT_EQ("[$bar][.dots ][$bar.dots]",
eval.Serialize());
}
TEST(Lexer, Error) {
Lexer lexer("foo$\nbad $");
EvalString eval;
string err;
ASSERT_FALSE(lexer.ReadVarValue(&eval, &err));
EXPECT_EQ("input:2: bad $-escape (literal $ must be written as $$)\n"
"bad $\n"
" ^ near here"
, err);
}
TEST(Lexer, CommentEOF) {
// Verify we don't run off the end of the string when the EOF is
// mid-comment.
Lexer lexer("# foo");
Lexer::Token token = lexer.ReadToken();
EXPECT_EQ(Lexer::ERROR, token);
}
TEST(Lexer, Tabs) {
// Verify we print a useful error on a disallowed character.
Lexer lexer(" \tfoobar");
Lexer::Token token = lexer.ReadToken();
EXPECT_EQ(Lexer::INDENT, token);
token = lexer.ReadToken();
EXPECT_EQ(Lexer::ERROR, token);
EXPECT_EQ("tabs are not allowed, use spaces", lexer.DescribeLastError());
}
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