public async Task GetFileStreamAsync_ReturnsFileStreamIfFileExists()
        {
            // Arrange
            var fileName = Path.GetRandomFileName();

            var expectedContents = AzureFileStorageTestHelper.CreateRandomString();

            await AzureFileStorageTestHelper.CreateTestFileAsync(_fileShare, fileName, expectedContents);

            // Act
            using (var stream = await _sut.GetFileStreamAsync(fileName))
                using (var reader = new StreamReader(stream, Encoding.UTF8))
                {
                    var contents = reader.ReadToEnd();

                    // Assert
                    Assert.Equal(expectedContents, contents);
                }
        }