Fix test failures

Author: cnblogs-dudu

src/IdentityServer4/test/IdentityServer.IntegrationTests/Clients/ClientCredentialsClient.cs

@@ -76,7 +76,7 @@ public async Task Valid_request_single_audience_should_return_expected_payload()
             payload.Should().Contain("client_id", "client");
             payload.Keys.Should().Contain("jti");
             payload.Keys.Should().Contain("iat");
-            
+
             payload["aud"].Should().Be("api");
 
             var scopes = payload["scope"] as JArray;
@@ -108,7 +108,7 @@ public async Task Valid_request_multiple_audiences_should_return_expected_payloa
             payload.Keys.Should().Contain("jti");
             payload.Keys.Should().Contain("iat");
 
-            var audiences = ((JArray)payload["aud"]).Select(x => x.ToString());
+            var audiences = ((JArray) payload["aud"]).Select(x => x.ToString());
             audiences.Count().Should().Be(2);
             audiences.Should().Contain("api");
             audiences.Should().Contain("other_api");
@@ -175,7 +175,7 @@ public async Task Requesting_multiple_scopes_should_return_expected_payload()
             payload.Should().Contain("client_id", "client");
             payload.Keys.Should().Contain("jti");
             payload.Keys.Should().Contain("iat");
-            
+
             payload["aud"].Should().Be("api");
 
             var scopes = payload["scope"] as JArray;
@@ -208,12 +208,12 @@ public async Task Request_with_no_explicit_scopes_should_return_expected_payload
             payload.Keys.Should().Contain("jti");
             payload.Keys.Should().Contain("iat");
 
-            var audiences = ((JArray)payload["aud"]).Select(x => x.ToString());
+            var audiences = ((JArray) payload["aud"]).Select(x => x.ToString());
             audiences.Count().Should().Be(2);
             audiences.Should().Contain("api");
             audiences.Should().Contain("other_api");
 
-            var scopes = ((JArray)payload["scope"]).Select(x => x.ToString());
+            var scopes = ((JArray) payload["scope"]).Select(x => x.ToString());
             scopes.Count().Should().Be(3);
             scopes.Should().Contain("api1");
             scopes.Should().Contain("api2");
@@ -286,7 +286,7 @@ public async Task Request_For_client_with_no_secret_and_basic_authentication_sho
             response.RefreshToken.Should().BeNull();
 
             var payload = GetPayload(response);
-            
+
             payload.Should().Contain("iss", "https://idsvr4");
             payload.Should().Contain("client_id", "client.no_secret");
 

src/IdentityServer4/test/IdentityServer.IntegrationTests/Clients/CustomTokenResponseClients.cs

@@ -282,7 +282,7 @@ private CustomResponseDto GetDto(JObject responseObject)
 
         private Dictionary<string, object> GetFields(TokenResponse response)
         {
-            return response.Json.Deserialize<Dictionary<string, object>>();
+            return JObject.Parse(response.Json.ToString()).ToObject<Dictionary<string, object>>();
         }
 
         private Dictionary<string, object> GetPayload(TokenResponse response)

src/IdentityServer4/test/IdentityServer.IntegrationTests/Endpoints/Introspection/IntrospectionTests.cs

@@ -259,7 +259,7 @@ public async Task Response_data_should_be_valid_using_multiple_scopes_multiple_a
                 Token = tokenResponse.AccessToken
             });
 
-            var values = introspectionResponse.Json.Deserialize<Dictionary<string, object>>();
+            var values = JObject.Parse(introspectionResponse.Json.ToString()).ToObject<Dictionary<string, object>>();
 
             values["aud"].GetType().Name.Should().Be("JArray");
 
@@ -304,7 +304,7 @@ public async Task Response_data_should_be_valid_using_multiple_scopes_single_aud
                 Token = tokenResponse.AccessToken
             });
 
-            var values = introspectionResponse.Json.Deserialize<Dictionary<string, object>>();
+            var values = JObject.Parse(introspectionResponse.Json.ToString()).ToObject<Dictionary<string, object>>();
 
             values["aud"].GetType().Name.Should().Be("String");
             values["iss"].GetType().Name.Should().Be("String");