public void TestProperlyDisposedReader()
{
var file = new FileInfo(Path.Combine(TestContext.CurrentContext.TestDirectory, @"Disposing\Resources\TextFile1.txt"));
var goodConsumer = new GoodStreamConsumer();
//so, it works first time it's used
Assert.IsNotNull(goodConsumer.GetFirstLine(file));
//and again...
Assert.IsNotNull(goodConsumer.GetFirstLine(file));
//and even if you create a new instance of the consumer (duh!)
Assert.IsNotNull(new GoodStreamConsumer().GetFirstLine(file));
}
public void TestFileAccessedInDifferentScope()
{
//this file was accessed in the constructor of a different class, called by a constructor - that's not visible, but still the file is not available
FileInfo file = new FileInfo(Path.Combine(TestContext.CurrentContext.TestDirectory, @"Disposing\Resources\TextFile3.txt"));
GoodStreamConsumer goodConsumer = new GoodStreamConsumer();
//even a proper reader won't handle it
Assert.That(() => goodConsumer.GetFirstLine(file),
Throws.Exception.TypeOf(typeof(IOException))
.With.Message.Contain("The process cannot access the file")
.And.With.Message.Contain(" because it is being used by another process"));
}