public async Task ReadAllTextAsync_FileNotFound_ThrowException()
{
// Arrange
var nonExistingJsonFilePath = "non-existing-file.json";
Func <Task> act = () => _testModule.ReadAllTextAsync(nonExistingJsonFilePath);
// Act
var ex = await Record.ExceptionAsync(act);
// Assert
Assert.IsType <FileNotFoundException>(ex);
}
