/*
 * MappedFileTest.cpp
 *
 *  Created on: Feb 25, 2014
 *      Author: Manuel Sascha Weiand
 */

#include "gtest/gtest.h"
#include "storm-config.h"

#include <string>
#include "src/parser/MappedFile.h"
#include "src/utility/cstring.h"
#include "src/exceptions/FileIoException.h"

TEST(MappedFileTest, NonExistingFile) {
	// No matter what happens, please do NOT create a file with the name "nonExistingFile.not"!
	ASSERT_THROW(storm::parser::MappedFile(STORM_CPP_TESTS_BASE_PATH "/nonExistingFile.not"), storm::exceptions::FileIoException);
}

TEST(MappedFileTest, BasicFunctionality) {

	// Open a file and test if the content is loaded as expected.
	storm::parser::MappedFile file(STORM_CPP_TESTS_BASE_PATH "/functional/parser/testStringFile.txt");
	std::string testString = "This is a test string.";
	char * dataPtr = file.getData();
	for(char const * testStringPtr = testString.c_str(); testStringPtr - testString.c_str() < 22; testStringPtr++) {
		ASSERT_EQ(*testStringPtr, *dataPtr);
		dataPtr++;
	}
	// The next character should be an end of line character (actual character varies between operating systems).
	ASSERT_EQ(dataPtr, storm::utility::cstring::forwardToLineEnd(dataPtr));

	// The newline character should be the last contained in the string.
	ASSERT_EQ(file.getDataEnd(), storm::utility::cstring::forwardToNextLine(dataPtr));

}

TEST(MappedFileTest, ExistsAndReadble) {

	// Test the fileExistsAndIsReadable() method under various circumstances.

	// File exists and is readable.
	ASSERT_TRUE(storm::parser::MappedFile::fileExistsAndIsReadable(STORM_CPP_TESTS_BASE_PATH "/functional/parser/testStringFile.txt"));

	// File does not exist.
	ASSERT_FALSE(storm::parser::MappedFile::fileExistsAndIsReadable(STORM_CPP_TESTS_BASE_PATH "/nonExistingFile.not"));

	// File exists but is not readable.
	// TODO: Find portable solution to providing a situation in which a file exists but is not readable.
	//ASSERT_FALSE(storm::parser::MappedFile::fileExistsAndIsReadable(STORM_CPP_TESTS_BASE_PATH "/functional/parser/unreadableFile.txt"));
}