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//===-- StreamTeeTest.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/Utility/StreamTee.h"
#include "lldb/Utility/StreamString.h"
#include "gtest/gtest.h"
using namespace lldb_private;
TEST(StreamTeeTest, DefaultConstructor) {
// Test the default constructor.
StreamTee tee;
ASSERT_EQ(0U, tee.GetNumStreams());
}
TEST(StreamTeeTest, Constructor1Stream) {
// Test the constructor for a single stream.
lldb::StreamSP s1(std::make_shared<StreamString>());
StreamTee tee(s1);
ASSERT_EQ(1U, tee.GetNumStreams());
EXPECT_EQ(s1, tee.GetStreamAtIndex(0U));
}
TEST(StreamTeeTest, Constructor2Streams) {
// Test the constructor for two streams.
lldb::StreamSP s1(std::make_shared<StreamString>());
lldb::StreamSP s2(std::make_shared<StreamString>());
StreamTee tee(s1, s2);
ASSERT_EQ(2U, tee.GetNumStreams());
EXPECT_EQ(s1, tee.GetStreamAtIndex(0U));
EXPECT_EQ(s2, tee.GetStreamAtIndex(1U));
}
TEST(StreamTeeTest, CopyConstructor) {
// Test the copy constructor.
lldb::StreamSP s1(std::make_shared<StreamString>());
lldb::StreamSP s2(std::make_shared<StreamString>());
StreamTee tee1(s1, s2);
StreamTee tee2(tee1);
ASSERT_EQ(2U, tee2.GetNumStreams());
EXPECT_EQ(s1, tee2.GetStreamAtIndex(0U));
EXPECT_EQ(s2, tee2.GetStreamAtIndex(1U));
}
TEST(StreamTeeTest, Assignment) {
// Test the assignment of StreamTee.
lldb::StreamSP s1(std::make_shared<StreamString>());
lldb::StreamSP s2(std::make_shared<StreamString>());
StreamTee tee1(s1, s2);
StreamTee tee2 = tee1;
ASSERT_EQ(2U, tee2.GetNumStreams());
EXPECT_EQ(s1, tee2.GetStreamAtIndex(0U));
EXPECT_EQ(s2, tee2.GetStreamAtIndex(1U));
}
TEST(StreamTeeTest, Write) {
// Test that write is sent out to all children.
auto ss1 = new StreamString();
auto ss2 = new StreamString();
lldb::StreamSP s1(ss1);
lldb::StreamSP s2(ss2);
StreamTee tee(s1, s2);
tee << "foo";
tee.Flush();
ASSERT_EQ(2U, tee.GetNumStreams());
EXPECT_EQ("foo", ss1->GetString().str());
EXPECT_EQ("foo", ss2->GetString().str());
tee << "bar";
tee.Flush();
EXPECT_EQ("foobar", ss1->GetString().str());
EXPECT_EQ("foobar", ss2->GetString().str());
}
namespace {
struct FlushTestStream : public Stream {
unsigned m_flush_count = false;
void Flush() override {
++m_flush_count;
}
size_t WriteImpl(const void *src, size_t src_len) override {
return src_len;
}
};
}
TEST(StreamTeeTest, Flush) {
// Check that Flush is distributed to all streams.
auto fs1 = new FlushTestStream();
auto fs2 = new FlushTestStream();
lldb::StreamSP s1(fs1);
lldb::StreamSP s2(fs2);
StreamTee tee(s1, s2);
tee << "foo";
tee.Flush();
ASSERT_EQ(2U, tee.GetNumStreams());
EXPECT_EQ(1U, fs1->m_flush_count);
EXPECT_EQ(1U, fs2->m_flush_count);
tee << "bar";
tee.Flush();
EXPECT_EQ(2U, fs1->m_flush_count);
EXPECT_EQ(2U, fs2->m_flush_count);
}
TEST(StreamTeeTest, AppendStream) {
// Append new streams to our StreamTee.
auto ss1 = new StreamString();
auto ss2 = new StreamString();
lldb::StreamSP s1(ss1);
lldb::StreamSP s2(ss2);
StreamTee tee;
ASSERT_EQ(0U, tee.GetNumStreams());
tee.AppendStream(s1);
ASSERT_EQ(1U, tee.GetNumStreams());
EXPECT_EQ(s1, tee.GetStreamAtIndex(0U));
tee.AppendStream(s2);
ASSERT_EQ(2U, tee.GetNumStreams());
EXPECT_EQ(s1, tee.GetStreamAtIndex(0U));
EXPECT_EQ(s2, tee.GetStreamAtIndex(1U));
}
TEST(StreamTeeTest, GetStreamAtIndexOutOfBounds) {
// The index we check for is not in the bounds of the StreamTee.
lldb::StreamSP s1(std::make_shared<StreamString>());
StreamTee tee(s1);
ASSERT_EQ(1U, tee.GetNumStreams());
EXPECT_EQ(lldb::StreamSP(), tee.GetStreamAtIndex(1));
}
TEST(StreamTeeTest, GetStreamAtIndexOutOfBoundsEmpty) {
// Same as above, but with an empty StreamTee.
StreamTee tee;
ASSERT_EQ(0U, tee.GetNumStreams());
EXPECT_EQ(lldb::StreamSP(), tee.GetStreamAtIndex(0U));
EXPECT_EQ(lldb::StreamSP(), tee.GetStreamAtIndex(1U));
}
TEST(StreamTeeTest, SetStreamAtIndexOverwrite) {
// We overwrite an existing stream at a given index.
lldb::StreamSP s1(std::make_shared<StreamString>());
StreamTee tee(s1);
ASSERT_EQ(1U, tee.GetNumStreams());
EXPECT_EQ(s1, tee.GetStreamAtIndex(0U));
EXPECT_EQ(lldb::StreamSP(), tee.GetStreamAtIndex(1U));
lldb::StreamSP s2(std::make_shared<StreamString>());
tee.SetStreamAtIndex(0U, s2);
EXPECT_EQ(1U, tee.GetNumStreams());
EXPECT_EQ(s2, tee.GetStreamAtIndex(0U));
EXPECT_EQ(lldb::StreamSP(), tee.GetStreamAtIndex(1));
}
TEST(StreamTeeTest, SetStreamAtIndexOutOfBounds) {
// We place a new stream out of the bounds of the current StreamTee.
lldb::StreamSP s1(std::make_shared<StreamString>());
StreamTee tee(s1);
ASSERT_EQ(1U, tee.GetNumStreams());
EXPECT_EQ(s1, tee.GetStreamAtIndex(0U));
EXPECT_EQ(lldb::StreamSP(), tee.GetStreamAtIndex(1U));
// Place a new stream out of bounds of the current array. The StreamTee should
// resize itself until it can contain this index.
lldb::StreamSP s2(std::make_shared<StreamString>());
tee.SetStreamAtIndex(4U, s2);
// Check that the vector has been resized.
EXPECT_EQ(5U, tee.GetNumStreams());
// Is our stream at the right place?
EXPECT_EQ(s2, tee.GetStreamAtIndex(4U));
// Existing stream should still be there.
EXPECT_EQ(s1, tee.GetStreamAtIndex(0U));
// Other elements are all invalid StreamSPs.
EXPECT_EQ(lldb::StreamSP(), tee.GetStreamAtIndex(1U));
EXPECT_EQ(lldb::StreamSP(), tee.GetStreamAtIndex(2U));
EXPECT_EQ(lldb::StreamSP(), tee.GetStreamAtIndex(3U));
EXPECT_EQ(lldb::StreamSP(), tee.GetStreamAtIndex(5U));
}
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