public void GetRandomFile_SupplyEmptyCollection_ReturnsNullInstance()
{
// arrange
FileHelper fileHelper = new FileHelper();
// act
AppFile result = fileHelper.GetRandomFile(new List<AppFile>());
// assert
Assert.IsNull(result);
}
public void GetRandomFile_SupplyNullCollection_ThrowsFileArgumentNullException()
{
// arrange
FileHelper fileHelper = new FileHelper();
TestDelegate testDelegate = () => fileHelper.GetRandomFile(null);
// act, assert
Assert.That(testDelegate, Throws.Exception.TypeOf<ArgumentNullException>().With.Property("ParamName").EqualTo("files"));
}
public void GetRandomFile_SupplyCollection_ReturnsAnyRandomInstance(int filesCount)
{
// arrange
FileHelper fileHelper = new FileHelper();
List<AppFile> files = new List<AppFile>();
for (int i = 0; i < filesCount; i++)
{
files.Add(new AppFile {});
}
// act
AppFile result = fileHelper.GetRandomFile(files);
// assert
Assert.Contains(result, files);
}
