// Copyright (c) AlphaSierraPapa for the SharpDevelop Team (for details please see \doc\copyright.txt)
// This code is distributed under the GNU LGPL (for details please see \doc\license.txt)

using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.IO;
using System.Text;
using ICSharpCode.Core;
using ICSharpCode.CodeCoverage;
using ICSharpCode.CodeCoverage.Tests.Utils;
using ICSharpCode.SharpDevelop;
using ICSharpCode.UnitTesting;
using NUnit.Framework;
using UnitTesting.Tests.Utils;

namespace ICSharpCode.CodeCoverage.Tests.Testing
{
	[TestFixture]
	public class CodeCoverageTestRunnerTests
	{
		MockProcessRunner processRunner;
		MockTestResultsMonitor testResultsMonitor;
		UnitTestingOptions options;
		DerivedCodeCoverageTestRunner testRunner;
		MockFileSystem fileSystem;
		MockMessageService messageService;
		
		[SetUp]
		public void Init()
		{
			processRunner = new MockProcessRunner();
			testResultsMonitor = new MockTestResultsMonitor();
			options = new UnitTestingOptions(new Properties());
			fileSystem = new MockFileSystem();
			messageService = new MockMessageService();
			testRunner = new DerivedCodeCoverageTestRunner(processRunner, testResultsMonitor, options, fileSystem, messageService);
		}
		
		[Test]
		public void CreateTestResultForTestFrameworkReturnsNUnitTestResult()
		{
			TestResult testResult = new TestResult("abc");
			Assert.IsInstanceOf(typeof(NUnitTestResult), testRunner.CallCreateTestResultForTestFramework(testResult));
		}
		
		[Test]
		public void HasCodeCoverageResultsWhenCoverageFileExistsReturnsTrue()
		{
			StartTestRunner();
			
			fileSystem.FileExistsReturnValue = true;
			
			Assert.IsTrue(testRunner.HasCodeCoverageResults());
		}
		
		void StartTestRunner()
		{
			FileUtility.ApplicationRootPath = @"d:\sharpdevelop";
			MockCSharpProject project = new MockCSharpProject();
			SelectedTests tests = new SelectedTests(project);
			testRunner.Start(tests);
		}
		
		[Test]
		public void HasCodeCoverageResultsWhenCoverageFileDoesNotExistsReturnsFalse()
		{
			fileSystem.FileExistsReturnValue = false;
			StartTestRunner();
			Assert.IsFalse(testRunner.HasCodeCoverageResults());
		}
		
		[Test]
		public void HasCodeCoverageResultsAfterTestRunChecksPassesCodeCoverageFileToFileExistsMethod()
		{
			fileSystem.FileExistsReturnValue = false;
			fileSystem.FileExistsPathParameter = null;
			StartTestRunner();
			testRunner.HasCodeCoverageResults();
			
			string expectedFileName = 
				@"c:\projects\MyTests\PartCover\coverage.xml";
			
			Assert.AreEqual(expectedFileName, fileSystem.FileExistsPathParameter);
		}
		
		[Test]
		public void ReadCodeCoverageResultsAfterTestRunChecksPassesCodeCoverageFileToCreateTextReaderMethod()
		{
			StartTestRunner();
			
			fileSystem.FileExistsReturnValue = true;
			fileSystem.CreateTextReaderPathParameter = null;
			fileSystem.CreateTextReaderReturnValue = new StringReader("<abc/>");
			
			testRunner.ReadCodeCoverageResults();
			
			string expectedFileName = 
				@"c:\projects\MyTests\PartCover\coverage.xml";
			
			Assert.AreEqual(expectedFileName, fileSystem.CreateTextReaderPathParameter);
		}
		
		[Test]
		public void GetProcessStartInfoWhenTestResultsFileNameSetReturnsCommandLineWithTestResultsFileName()
		{
			FileUtility.ApplicationRootPath = @"d:\sharpdevelop";
			testResultsMonitor.FileName = @"d:\temp\results.txt";
			
			fileSystem.CreateTextReaderReturnValue = CreatePartCoverSettingsTextReader();
			fileSystem.FileExistsReturnValue = true;
			
			MockCSharpProject project = new MockCSharpProject();
			SelectedTests tests = new SelectedTests(project);
			testRunner.Start(tests);
			ProcessStartInfo processStartInfo = testRunner.CallGetProcessStartInfo(tests);
			
			string expectedCommandLine =
				"--target \"d:\\sharpdevelop\\bin\\Tools\\NUnit\\nunit-console-x86.exe\" " +
				"--target-work-dir \"c:\\projects\\MyTests\\bin\\Debug\" " +
				"--target-args \"\\\"c:\\projects\\MyTests\\bin\\Debug\\MyTests.dll\\\" /noxml /results=\\\"d:\\temp\\results.txt\\\"\" " +
				"--output \"c:\\projects\\MyTests\\PartCover\\coverage.xml\" " +
				"--include [MyTests]*";
			
			Assert.AreEqual(expectedCommandLine, processStartInfo.Arguments);
		}
		
		TextReader CreatePartCoverSettingsTextReader()
		{
			PartCoverSettings settings = new PartCoverSettings();
			settings.Include.Add("[MyTests]*");
			StringBuilder text = new StringBuilder();
			StringWriter writer = new StringWriter(text);
			settings.Save(writer);
			
			return new StringReader(text.ToString());
		}
		
		[Test]
		public void StartSetsProfilerEnvironmentVariableInProcessRunner()
		{
			StartTestRunner();
			string environmentVariableValue = processRunner.EnvironmentVariables["COMPLUS_ProfAPI_ProfilerCompatibilitySetting"];
			Assert.AreEqual("EnableV2Profiler", environmentVariableValue);
		}
		
		[Test]
		public void StartWhenCodeCoverageResultsFileExistsDeletesExistingCodeCoverageResultsFile()
		{
			fileSystem.FileExistsReturnValue = true;
			fileSystem.CreateTextReaderReturnValue = new StringReader("<abc/>");
			StartTestRunner();
			
			string expectedFileName = @"c:\projects\MyTests\PartCover\coverage.xml";
			Assert.AreEqual(expectedFileName, fileSystem.DeleteFilePathParameter);
		}
		
		[Test]
		public void StartWhenCodeCoverageResultsFileDoesNotExistsCodeCoverageResultsFileIsNotDeleted()
		{
			fileSystem.FileExistsReturnValue = false;
			StartTestRunner();
			
			Assert.IsNull(fileSystem.DeleteFilePathParameter);
		}
		
		[Test]
		public void StartCreatesDirectoryCodeCoverageResultsFileIfDoesNotExist()
		{
			fileSystem.DirectoryExistsReturnValue = false;
			StartTestRunner();
			
			string expectedDirectory = @"c:\projects\MyTests\PartCover";
			Assert.AreEqual(expectedDirectory, fileSystem.CreateDirectoryPathParameter);
		}
		
		[Test]
		public void StartChecksDirectoryForCodeCoverageResultsExists()
		{
			fileSystem.DirectoryExistsReturnValue = true;
			StartTestRunner();
			
			string expectedDirectory = @"c:\projects\MyTests\PartCover";
			Assert.AreEqual(expectedDirectory, fileSystem.DirectoryExistsPathParameter);
		}
		
		[Test]
		public void StartDoesNotCreateDirectoryForCodeCoverageResultsFileIfItExists()
		{
			fileSystem.DirectoryExistsReturnValue = true;
			StartTestRunner();
			
			Assert.IsNull(fileSystem.CreateDirectoryPathParameter);
		}
		
		[Test]
		public void StartFiresMessagesReceivedEventTwice()
		{
			List<string> messages = new List<string>();
			testRunner.MessageReceived += delegate(object o, MessageReceivedEventArgs e) {
				messages.Add(e.Message);
			};
			
			testRunner.ParseStringReturnValue = "Running code coverage";
			StartTestRunner();
			
			string[] expectedMessages = new string[] {
				"Running code coverage",
				GetCodeCoverageCommandLine()
			};
			
			Assert.AreEqual(expectedMessages, messages.ToArray());
		}
		
		string GetCodeCoverageCommandLine()
		{
			return 
				"\"d:\\sharpdevelop\\bin\\Tools\\PartCover\\PartCover.exe\" " +
				"--target \"d:\\sharpdevelop\\bin\\Tools\\NUnit\\nunit-console-x86.exe\" " +
				"--target-work-dir \"c:\\projects\\MyTests\\bin\\Debug\" " +
				"--target-args \"\\\"c:\\projects\\MyTests\\bin\\Debug\\MyTests.dll\\\" /noxml\" " + 
				"--output \"c:\\projects\\MyTests\\PartCover\\coverage.xml\" " +
				"--include [*]*";
		}
		
		[Test]
		public void StartParsesTextForRunningCodeCoverageMessages()
		{
			testRunner.ParseStringReturnValue = "Running code coverage";
			StartTestRunner();
			
			string expectedStringResource = "${res:ICSharpCode.CodeCoverage.RunningCodeCoverage}";
			
			Assert.AreEqual(expectedStringResource, testRunner.ParseStringParameter);
		}
	}
}