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Reader.cpp
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Reader.cpp
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// SPDX-License-Identifier: LGPL-2.1-or-later
#include "gtest/gtest.h"
#ifdef _MSC_VER
#pragma warning(disable : 4996)
#endif
#include "Base/Exception.h"
#include "Base/Reader.h"
#include <array>
#include <boost/filesystem.hpp>
#include <fmt/format.h>
#include <fstream>
namespace fs = boost::filesystem;
class ReaderTest: public ::testing::Test
{
protected:
void SetUp() override
{
xercesc_3_2::XMLPlatformUtils::Initialize();
_tempDir = fs::temp_directory_path();
std::string filename = "unit_test_Reader.xml";
_tempFile = _tempDir / filename;
}
void TearDown() override
{
if (inputStream.is_open()) {
inputStream.close();
}
if (fs::exists(_tempFile)) {
fs::remove(_tempFile);
}
}
void givenDataAsXMLStream(const std::string& data)
{
auto stringData =
R"(<?xml version="1.0" encoding="UTF-8"?><document>)" + data + "</document>";
std::istringstream stream(stringData);
std::ofstream fileStream(_tempFile.string());
fileStream.write(stringData.data(), static_cast<std::streamsize>(stringData.length()));
fileStream.close();
inputStream.open(_tempFile.string());
_reader = std::make_unique<Base::XMLReader>(_tempFile.string().c_str(), inputStream);
}
Base::XMLReader* Reader()
{
return _reader.get();
}
private:
std::unique_ptr<Base::XMLReader> _reader;
fs::path _tempDir;
fs::path _tempFile;
std::ifstream inputStream;
};
TEST_F(ReaderTest, beginCharStreamNormal)
{
// Arrange
givenDataAsXMLStream("<data>Test ASCII data</data>");
Reader()->readElement("data");
// Act
auto& result = Reader()->beginCharStream();
// Assert
EXPECT_TRUE(result.good());
}
TEST_F(ReaderTest, beginCharStreamOpenClose)
{
// Arrange
givenDataAsXMLStream("<data id='12345' />");
Reader()->readElement("data");
// Act
auto& result = Reader()->beginCharStream(); // Not an error, even though there is no data
// Assert
EXPECT_TRUE(result.good());
}
TEST_F(ReaderTest, beginCharStreamAlreadyBegun)
{
// Arrange
givenDataAsXMLStream("<data>Test ASCII data</data>");
Reader()->readElement("data");
Reader()->beginCharStream();
// Act & Assert
EXPECT_THROW(Reader()->beginCharStream(), Base::XMLParseException); // NOLINT
}
TEST_F(ReaderTest, charStreamGood)
{
// Arrange
givenDataAsXMLStream("<data>Test ASCII data</data>");
Reader()->readElement("data");
Reader()->beginCharStream();
// Act
auto& result = Reader()->charStream();
// Assert
EXPECT_TRUE(result.good());
}
TEST_F(ReaderTest, charStreamBad)
{
// Arrange
givenDataAsXMLStream("<data>Test ASCII data</data>");
Reader()->readElement("data");
// Act & Assert
EXPECT_THROW(Reader()->charStream(), Base::XMLParseException); // NOLINT
}
TEST_F(ReaderTest, endCharStreamGood)
{
// Arrange
givenDataAsXMLStream("<data>Test ASCII data</data>");
Reader()->readElement("data");
Reader()->beginCharStream();
// Act & Assert
Reader()->endCharStream(); // Does not throw
}
TEST_F(ReaderTest, endCharStreamBad)
{
// Arrange
givenDataAsXMLStream("<data>Test ASCII data</data>");
Reader()->readElement("data");
// Do not open the stream...
// Act & Assert
Reader()->endCharStream(); // Does not throw, even with no open stream
}
TEST_F(ReaderTest, readDataSmallerThanBuffer)
{
// Arrange
constexpr size_t bufferSize {20};
std::string expectedData {"Test ASCII data"};
givenDataAsXMLStream("<data>" + expectedData + "</data>");
Reader()->readElement("data");
Reader()->beginCharStream();
std::array<char, bufferSize> buffer {};
// Act
auto bytesRead = Reader()->read(buffer.data(), bufferSize);
// Assert
EXPECT_STREQ(expectedData.c_str(), buffer.data());
EXPECT_EQ(expectedData.length(), bytesRead);
}
TEST_F(ReaderTest, readDataLargerThanBuffer)
{
// Arrange
constexpr size_t bufferSize {5};
std::string expectedData {"Test ASCII data"};
givenDataAsXMLStream("<data>" + expectedData + "</data>");
Reader()->readElement("data");
Reader()->beginCharStream();
std::array<char, bufferSize> buffer {};
// Act
auto bytesRead = Reader()->read(buffer.data(), bufferSize);
// Assert
for (size_t i = 0; i < bufferSize; ++i) {
EXPECT_EQ(expectedData[i], buffer.at(i));
}
EXPECT_EQ(bufferSize, bytesRead);
}
TEST_F(ReaderTest, readDataLargerThanBufferSecondRead)
{
// Arrange
constexpr size_t bufferSize {5};
std::string expectedData {"Test ASCII data"};
givenDataAsXMLStream("<data>" + expectedData + "</data>");
Reader()->readElement("data");
Reader()->beginCharStream();
std::array<char, bufferSize> buffer {};
Reader()->read(buffer.data(), bufferSize); // Read the first five bytes
// Act
auto bytesRead = Reader()->read(buffer.data(), bufferSize); // Second five bytes
// Assert
for (size_t i = 0; i < bufferSize; ++i) {
EXPECT_EQ(expectedData[i + bufferSize], buffer.at(i));
}
EXPECT_EQ(bufferSize, bytesRead);
}
TEST_F(ReaderTest, readDataNotStarted)
{
// Arrange
constexpr size_t bufferSize {20};
std::string expectedData {"Test ASCII data"};
givenDataAsXMLStream("<data>" + expectedData + "</data>");
Reader()->readElement("data");
std::array<char, bufferSize> buffer {};
// Act
auto bytesRead = Reader()->read(buffer.data(), bufferSize);
// Assert
EXPECT_EQ(-1, bytesRead); // Because we didn't call beginCharStream
}
TEST_F(ReaderTest, readNextStartElement)
{
auto xmlBody = R"(
<node1 attr='1'>Node1</node1>
<node2 attr='2'>Node2</node2>
)";
givenDataAsXMLStream(xmlBody);
// start of document
Reader()->readElement("document");
EXPECT_STREQ(Reader()->localName(), "document");
// next element
EXPECT_TRUE(Reader()->readNextElement());
EXPECT_STREQ(Reader()->localName(), "node1");
EXPECT_STREQ(Reader()->getAttribute("attr"), "1");
Reader()->readEndElement("node1");
EXPECT_TRUE(Reader()->isEndOfElement());
// next element
EXPECT_TRUE(Reader()->readNextElement());
EXPECT_STREQ(Reader()->localName(), "node2");
EXPECT_STREQ(Reader()->getAttribute("attr"), "2");
Reader()->readEndElement("node2");
EXPECT_TRUE(Reader()->isEndOfElement());
Reader()->readEndElement("document");
EXPECT_TRUE(Reader()->isEndOfDocument());
}
TEST_F(ReaderTest, readNextStartEndElement)
{
auto xmlBody = R"(
<node1 attr='1'/>
<node2 attr='2'/>
)";
givenDataAsXMLStream(xmlBody);
// start of document
Reader()->readElement("document");
EXPECT_STREQ(Reader()->localName(), "document");
// next element
EXPECT_TRUE(Reader()->readNextElement());
EXPECT_STREQ(Reader()->localName(), "node1");
EXPECT_STREQ(Reader()->getAttribute("attr"), "1");
// next element
EXPECT_TRUE(Reader()->readNextElement());
EXPECT_STREQ(Reader()->localName(), "node2");
EXPECT_STREQ(Reader()->getAttribute("attr"), "2");
EXPECT_FALSE(Reader()->readNextElement());
EXPECT_TRUE(Reader()->isEndOfDocument());
}
TEST_F(ReaderTest, charStreamBase64Encoded)
{
// Arrange
static constexpr size_t bufferSize {100};
std::array<char, bufferSize> buffer {};
givenDataAsXMLStream("<data>RnJlZUNBRCByb2NrcyEg8J+qqPCfqqjwn6qo\n</data>");
Reader()->readElement("data");
Reader()->beginCharStream(Base::CharStreamFormat::Base64Encoded);
// Act
Reader()->charStream().getline(buffer.data(), bufferSize);
Reader()->endCharStream();
// Assert
// Conversion done using https://www.base64encode.org for testing purposes
EXPECT_EQ(std::string("FreeCAD rocks! 🪨🪨🪨"), std::string(buffer.data()));
}