public void Read_ThrowsFileNotFoundException_WhenFileDoesntExist()
{
//Arrange
var file = new LocalFile($@"C:\{Guid.NewGuid()}.txt");
//Act & Assert
file.Read(); //Exception
}
public async Task WriteAsync_ThrowsArgumentNullException_WhenStreamIsNull()
{
//Arrange
var file = new LocalFile(@"C:\TestPath");
//Act
await file.WriteAsync(null); //Exception
}
public void Write_ThrowsArgumentNullException_WhenStreamIsNull()
{
//Arrange
var file = new LocalFile(@"C:\TestPath");
//Act
file.Write(null); //Exception
}
public async Task WriteAsync_ThrowsArgumentException_WhenStreamIsntReadable()
{
//Arrange
Mock<Stream> streamMock = new Mock<Stream>();
streamMock.Setup(m => m.CanRead).Returns(false);
Stream stream = streamMock.Object;
var file = new LocalFile(@"C:\TestPath");
//Act & Assert
await file.WriteAsync(stream); //Exception
}
public void Read_ReadsText123_FromFile()
{
//Arrange
string expected = "123";
string actual;
var file = new LocalFile(_path);
File.WriteAllText(_path, expected);
//Act
Stream myFile = file.Read();
using (var reader = new StreamReader(myFile))
{
actual = reader.ReadToEnd();
}
//Assert
Assert.AreEqual(expected, actual);
}
public async Task WriteAsync_WritesText123_ToFile()
{
//Arrange
string expected = "123";
string actual;
var file = new LocalFile(_path);
byte[] text = expected.Select(Convert.ToByte).ToArray();
//Act
using (var memoryStream = new MemoryStream(text))
{
await file.WriteAsync(memoryStream);
}
actual = File.ReadAllText(_path);
//Assert
Assert.AreEqual(expected, actual);
}
