LineIteratorTest.cpp
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//===- LineIterator.cpp - Unit tests --------------------------------------===//
//
// 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 "llvm/Support/LineIterator.h"
#include "llvm/Support/MemoryBuffer.h"
#include "gtest/gtest.h"
using namespace llvm;
using namespace llvm::sys;
namespace {
TEST(LineIteratorTest, Basic) {
std::unique_ptr<MemoryBuffer> Buffer = MemoryBuffer::getMemBuffer("line 1\n"
"line 2\n"
"line 3");
line_iterator I = line_iterator(*Buffer), E;
EXPECT_FALSE(I.is_at_eof());
EXPECT_NE(E, I);
EXPECT_EQ("line 1", *I);
EXPECT_EQ(1, I.line_number());
++I;
EXPECT_EQ("line 2", *I);
EXPECT_EQ(2, I.line_number());
++I;
EXPECT_EQ("line 3", *I);
EXPECT_EQ(3, I.line_number());
++I;
EXPECT_TRUE(I.is_at_eof());
EXPECT_EQ(E, I);
}
TEST(LineIteratorTest, CommentAndBlankSkipping) {
std::unique_ptr<MemoryBuffer> Buffer(
MemoryBuffer::getMemBuffer("line 1\n"
"line 2\n"
"# Comment 1\n"
"\n"
"line 5\n"
"\n"
"# Comment 2"));
line_iterator I = line_iterator(*Buffer, true, '#'), E;
EXPECT_FALSE(I.is_at_eof());
EXPECT_NE(E, I);
EXPECT_EQ("line 1", *I);
EXPECT_EQ(1, I.line_number());
++I;
EXPECT_EQ("line 2", *I);
EXPECT_EQ(2, I.line_number());
++I;
EXPECT_EQ("line 5", *I);
EXPECT_EQ(5, I.line_number());
++I;
EXPECT_TRUE(I.is_at_eof());
EXPECT_EQ(E, I);
}
TEST(LineIteratorTest, CommentSkippingKeepBlanks) {
std::unique_ptr<MemoryBuffer> Buffer(
MemoryBuffer::getMemBuffer("line 1\n"
"line 2\n"
"# Comment 1\n"
"# Comment 2\n"
"\n"
"line 6\n"
"\n"
"# Comment 3"));
line_iterator I = line_iterator(*Buffer, false, '#'), E;
EXPECT_FALSE(I.is_at_eof());
EXPECT_NE(E, I);
EXPECT_EQ("line 1", *I);
EXPECT_EQ(1, I.line_number());
++I;
EXPECT_EQ("line 2", *I);
EXPECT_EQ(2, I.line_number());
++I;
EXPECT_EQ("", *I);
EXPECT_EQ(5, I.line_number());
++I;
EXPECT_EQ("line 6", *I);
EXPECT_EQ(6, I.line_number());
++I;
EXPECT_EQ("", *I);
EXPECT_EQ(7, I.line_number());
++I;
EXPECT_TRUE(I.is_at_eof());
EXPECT_EQ(E, I);
}
TEST(LineIteratorTest, BlankSkipping) {
std::unique_ptr<MemoryBuffer> Buffer = MemoryBuffer::getMemBuffer("\n\n\n"
"line 1\n"
"\n\n\n"
"line 2\n"
"\n\n\n");
line_iterator I = line_iterator(*Buffer), E;
EXPECT_FALSE(I.is_at_eof());
EXPECT_NE(E, I);
EXPECT_EQ("line 1", *I);
EXPECT_EQ(4, I.line_number());
++I;
EXPECT_EQ("line 2", *I);
EXPECT_EQ(8, I.line_number());
++I;
EXPECT_TRUE(I.is_at_eof());
EXPECT_EQ(E, I);
}
TEST(LineIteratorTest, BlankKeeping) {
std::unique_ptr<MemoryBuffer> Buffer = MemoryBuffer::getMemBuffer("\n\n"
"line 3\n"
"\n"
"line 5\n"
"\n\n");
line_iterator I = line_iterator(*Buffer, false), E;
EXPECT_FALSE(I.is_at_eof());
EXPECT_NE(E, I);
EXPECT_EQ("", *I);
EXPECT_EQ(1, I.line_number());
++I;
EXPECT_EQ("", *I);
EXPECT_EQ(2, I.line_number());
++I;
EXPECT_EQ("line 3", *I);
EXPECT_EQ(3, I.line_number());
++I;
EXPECT_EQ("", *I);
EXPECT_EQ(4, I.line_number());
++I;
EXPECT_EQ("line 5", *I);
EXPECT_EQ(5, I.line_number());
++I;
EXPECT_EQ("", *I);
EXPECT_EQ(6, I.line_number());
++I;
EXPECT_EQ("", *I);
EXPECT_EQ(7, I.line_number());
++I;
EXPECT_TRUE(I.is_at_eof());
EXPECT_EQ(E, I);
}
TEST(LineIteratorTest, EmptyBuffers) {
std::unique_ptr<MemoryBuffer> Buffer = MemoryBuffer::getMemBuffer("");
EXPECT_TRUE(line_iterator(*Buffer).is_at_eof());
EXPECT_EQ(line_iterator(), line_iterator(*Buffer));
EXPECT_TRUE(line_iterator(*Buffer, false).is_at_eof());
EXPECT_EQ(line_iterator(), line_iterator(*Buffer, false));
Buffer = MemoryBuffer::getMemBuffer("\n\n\n");
EXPECT_TRUE(line_iterator(*Buffer).is_at_eof());
EXPECT_EQ(line_iterator(), line_iterator(*Buffer));
Buffer = MemoryBuffer::getMemBuffer("# foo\n"
"\n"
"# bar");
EXPECT_TRUE(line_iterator(*Buffer, true, '#').is_at_eof());
EXPECT_EQ(line_iterator(), line_iterator(*Buffer, true, '#'));
Buffer = MemoryBuffer::getMemBuffer("\n"
"# baz\n"
"\n");
EXPECT_TRUE(line_iterator(*Buffer, true, '#').is_at_eof());
EXPECT_EQ(line_iterator(), line_iterator(*Buffer, true, '#'));
}
} // anonymous namespace