QueueOverrideChannel test.

dialogue-core/src/test/java/com/palantir/dialogue/core/QueueOverrideChannelTest.java

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+/*
+ * (c) Copyright 2021 Palantir Technologies Inc. All rights reserved.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.palantir.dialogue.core;
+
+import static org.assertj.core.api.Assertions.assertThat;
+import static org.mockito.Mockito.verify;
+import static org.mockito.Mockito.verifyNoMoreInteractions;
+
+import com.palantir.dialogue.Channel;
+import com.palantir.dialogue.Request;
+import com.palantir.dialogue.TestEndpoint;
+import org.junit.jupiter.api.AfterEach;
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.extension.ExtendWith;
+import org.mockito.Mock;
+import org.mockito.junit.jupiter.MockitoExtension;
+
+@ExtendWith(MockitoExtension.class)
+public final class QueueOverrideChannelTest {
+
+    @Mock
+    private Channel defaultDelegate;
+
+    @Mock
+    private Channel override;
+
+    private Channel queueOverrideChannel;
+
+    @BeforeEach
+    public void beforeEach() {
+        queueOverrideChannel = new QueueOverrideChannel(defaultDelegate);
+    }
+
+    @AfterEach
+    public void afterEach() {
+        verifyNoMoreInteractions(defaultDelegate, override);
+    }
+
+    @Test
+    public void routesToDefault() {
+        Request request = Request.builder().build();
+        assertThat(queueOverrideChannel.execute(TestEndpoint.GET, request)).isNull();
+        verify(defaultDelegate).execute(TestEndpoint.GET, request);
+    }
+
+    @Test
+    public void routesToOverride() {
+        Request request = Request.builder().build();
+        QueueAttachments.setQueueOverride(request, override);
+        assertThat(queueOverrideChannel.execute(TestEndpoint.GET, request)).isNull();
+        verify(override).execute(TestEndpoint.GET, request);
+    }
+}