Add unit test for Plug-ins client

Signed-off-by: Victor Chang <[email protected]>

src/Client/Test/AeTitleServiceTest.cs

@@ -460,5 +460,64 @@ public async Task CEcho_ReturnsAProblem()
 
             Assert.Equal($"HTTP Status: {problem.Status}. {problem.Detail}", result.Message);
         }
+
+        [Fact(DisplayName = "AET - Plugins")]
+        public async Task Plugins()
+        {
+            var plugins = new Dictionary<string, string>
+            {
+                {"A","1" },
+                {"B","2" },
+                {"C","3" },
+            };
+
+            var json = JsonSerializer.Serialize(plugins, Configuration.JsonSerializationOptions);
+
+            var rootUri = new Uri("http://localhost:5000");
+            var uriPath = "config/monaiaetitle/plug-ins";
+
+            var httpResponse = new HttpResponseMessage
+            {
+                StatusCode = HttpStatusCode.OK,
+                Content = new StringContent(json, Encoding.UTF8, "application/json")
+            };
+
+            var httpClient = SetupHttpClientMock(rootUri, HttpMethod.Get, httpResponse);
+
+            var service = new AeTitleService<DestinationApplicationEntity>(uriPath, httpClient, _logger.Object);
+
+            var exception = await Record.ExceptionAsync(async () => await service.Plugins(CancellationToken.None));
+            Assert.Null(exception);
+        }
+
+        [Fact(DisplayName = "AET - Plugins returns a problem")]
+        public async Task Plugins_ReturnsAProblem()
+        {
+            var problem = new ProblemDetails
+            {
+                Title = "Problem Title",
+                Detail = "Problem Detail",
+                Status = 500
+            };
+
+            var json = JsonSerializer.Serialize(problem, Configuration.JsonSerializationOptions);
+
+            var rootUri = new Uri("http://localhost:5000");
+            var uriPath = "config/destination";
+
+            var httpResponse = new HttpResponseMessage
+            {
+                StatusCode = HttpStatusCode.InternalServerError,
+                Content = new StringContent(json, Encoding.UTF8, "application/json")
+            };
+
+            var httpClient = SetupHttpClientMock(rootUri, HttpMethod.Get, httpResponse);
+
+            var service = new AeTitleService<DestinationApplicationEntity>(uriPath, httpClient, _logger.Object);
+
+            var result = await Assert.ThrowsAsync<ProblemException>(async () => await service.Plugins(CancellationToken.None));
+
+            Assert.Equal($"HTTP Status: {problem.Status}. {problem.Detail}", result.Message);
+        }
     }
 }