public async Task CheckFeature_ShouldReturnFeatureEnabledOrNot()
    {
        // Arrange
        var client = new HttPlaceholderClient(CreateHttpClient(mock => mock
                                                               .When($"{BaseUrl}ph-api/metadata/features/authentication")
                                                               .Respond("application/json", FeatureResponse)));

        // Act
        var result = await client.CheckFeatureAsync(FeatureFlagType.Authentication);

        // Assert
        Assert.IsTrue(result);
    }
    public async Task CheckFeature_ExceptionInRequest_ShouldThrowHttPlaceholderClientException()
    {
        // Arrange
        var client = new HttPlaceholderClient(CreateHttpClient(mock => mock
                                                               .When($"{BaseUrl}ph-api/metadata/features/authentication")
                                                               .Respond(HttpStatusCode.BadRequest, "text/plain", "Error occurred!")));

        // Act
        var exception =
            await Assert.ThrowsExceptionAsync <HttPlaceholderClientException>(() => client.CheckFeatureAsync(FeatureFlagType.Authentication));

        // Assert
        Assert.AreEqual("Status code '400' returned by HttPlaceholder with message 'Error occurred!'",
                        exception.Message);
    }