public async Task BlobCopy_ShouldThrowException_WhenSourceAndOrDestUriIsNull(string source, string dest) { // Arrange Uri sourceUri = null; Uri destUri = null; if (source != null) { sourceUri = new Uri(source); } if (dest != null) { destUri = new Uri(dest); } var context = new StorageClientProviderContext("{ \"a\" : 1 }", false, string.Empty); // Act & Assert await Assert.ThrowsAsync <ArgumentNullException>(() => _storageService.BlobCopy(sourceUri, destUri, context)).ConfigureAwait(false); }