Please help, Hi I need to write unit test for the following methods

  [Fact]
        public async Task ContentfulManagementClient_CreateEntry_IfSlugAndPreviousSlugDifferent()
        {
            //// Arrange
            var contentTypeId = "pagePatientProfessionalArticle";
            var entryId = "test";
            var slug = "/newtest1";
            var previousSlug = "/newtest2";

            var r = new StreamReader("../../../mockdata/RedirectEntryModel.json");
            var json = r.ReadToEnd();

            SetupResponseJson(HttpStatusCode.OK, json);

            // act
            await _sut.HandleRedirectAsync(slug, previousSlug, contentTypeId, entryId);

            //act
            AssertRequest(HttpMethod.Put, $"/entries/{entryId}/published");
        }