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MockFile.AppendAllText creates the file if it doesn't exist. #55

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Merged
tathamoddie merged 1 commit into from
Dec 1, 2013
Merged

MockFile.AppendAllText creates the file if it doesn't exist. #55

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50 changes: 50 additions & 0 deletions TestHelpers.Tests/MockFileTests.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -29,6 +29,56 @@ public void MockFile_AppendAllText_ShouldPersistNewText()
file.ReadAllText(path));
}

[Test]
public void MockFile_AppendAllText_ShouldCreateIfNotExist()
{
// Arrange
string path = @"c:\something\demo.txt";
var fileSystem = new MockFileSystem(new Dictionary<string, MockFileData>
{
{ path, new MockFileData("Demo text content") }
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@tathamoddie tathamoddie Dec 1, 2013

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This extra file seems extraneous for the test?

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@tathamoddie tathamoddie Dec 1, 2013

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Oh, never mind. It's because you need the folder...

});

// Act
var path2 = @"c:\something\demo2.txt";
fileSystem.File.AppendAllText(path2, "some text");
var path3 = @"c:\something\demo3.txt";
fileSystem.File.AppendAllText(path3, "some text", Encoding.Unicode);

// Assert
Assert.AreEqual(
"some text",
fileSystem.File.ReadAllText(path2));
Assert.AreEqual(
"some text",
fileSystem.File.ReadAllText(path3, Encoding.Unicode));
}

[Test]
public void MockFile_AppendAllText_ShouldFailIfNotExistButDirectoryAlsoNotExist()
{
// Arrange
string path = @"c:\something\demo.txt";
var fileSystem = new MockFileSystem(new Dictionary<string, MockFileData>
{
{ path, new MockFileData("Demo text content") }
});

var file = new MockFile(fileSystem);


// Act
path = @"c:\something2\demo.txt";

// Assert
Exception ex;
ex = Assert.Throws<DirectoryNotFoundException>(() => fileSystem.File.AppendAllText(path, "some text"));
Assert.That(ex.Message, Is.EqualTo(String.Format("Could not find a part of the path '{0}'.", path)));

ex = Assert.Throws<DirectoryNotFoundException>(() => fileSystem.File.AppendAllText(path, "some text", Encoding.Unicode));
Assert.That(ex.Message, Is.EqualTo(String.Format("Could not find a part of the path '{0}'.", path)));
}

[Test]
public void MockFile_AppendAllText_ShouldPersistNewTextWithCustomEncoding()
{
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38 changes: 31 additions & 7 deletions TestingHelpers/MockFile.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -18,17 +18,41 @@ public MockFile(IMockFileDataAccessor mockFileDataAccessor)

public override void AppendAllText(string path, string contents)
{
mockFileDataAccessor
.GetFile(path)
.TextContents += contents;
if (!mockFileDataAccessor.FileExists(path))
{
var dir = mockFileDataAccessor.Path.GetDirectoryName(path);
if (!mockFileDataAccessor.Directory.Exists(dir))
{
throw new DirectoryNotFoundException(String.Format("Could not find a part of the path '{0}'.", path));
}
mockFileDataAccessor.AddFile(path, new MockFileData(contents));
}
else
{
mockFileDataAccessor
.GetFile(path)
.TextContents += contents;
}
}

public override void AppendAllText(string path, string contents, Encoding encoding)
{
var file = mockFileDataAccessor.GetFile(path);
var originalText = encoding.GetString(file.Contents);
var newText = originalText + contents;
file.Contents = encoding.GetBytes(newText);
if (!mockFileDataAccessor.FileExists(path))
{
var dir = mockFileDataAccessor.Path.GetDirectoryName(path);
if (!mockFileDataAccessor.Directory.Exists(dir))
{
throw new DirectoryNotFoundException(String.Format("Could not find a part of the path '{0}'.", path));
}
mockFileDataAccessor.AddFile(path, new MockFileData(encoding.GetBytes(contents)));
}
else
{
var file = mockFileDataAccessor.GetFile(path);
var originalText = encoding.GetString(file.Contents);
var newText = originalText + contents;
file.Contents = encoding.GetBytes(newText);
}
}

public override StreamWriter AppendText(string path)
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