1 files changed, 70 insertions, 0 deletions
diff --git a/library/test/src/com/android/setupwizardlib/template/TemplateLayoutMixinTest.java b/library/test/src/com/android/setupwizardlib/template/TemplateLayoutMixinTest.java
new file mode 100644
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+++ b/library/test/src/com/android/setupwizardlib/template/TemplateLayoutMixinTest.java
@@ -0,0 +1,70 @@
+/*
+ * Copyright (C) 2017 The Android Open Source Project
+ *
+ * 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.android.setupwizardlib.template;
+
+import static org.junit.Assert.assertNotNull;
+import static org.junit.Assert.assertNull;
+import static org.junit.Assert.assertTrue;
+
+import android.content.Context;
+import android.support.test.InstrumentationRegistry;
+import android.support.test.filters.SmallTest;
+import android.support.test.runner.AndroidJUnit4;
+
+import com.android.setupwizardlib.TemplateLayout;
+import com.android.setupwizardlib.test.R;
+
+import org.junit.Before;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+
+@RunWith(AndroidJUnit4.class)
+@SmallTest
+public class TemplateLayoutMixinTest {
+
+    private TestTemplateLayout mLayout;
+
+    @Before
+    public void setUp() throws Exception {
+        mLayout = new TestTemplateLayout(InstrumentationRegistry.getContext());
+    }
+
+    @Test
+    public void testGetMixin() {
+        final TestMixin mixin = mLayout.getMixin(TestMixin.class);
+        assertNotNull("TestMixin should not be null", mixin);
+        assertTrue("TestMixin should be an instance of TestMixinSubclass. "
+                + "Found " + mixin.getClass() + " instead.",
+                mixin instanceof TestMixinSubclass);
+
+        // Mixin must be retrieved using the interface it's registered with, not the concrete class,
+        // although they are often the same.
+        assertNull("TestMixinSubclass should be null", mLayout.getMixin(TestMixinSubclass.class));
+    }
+
+    private static class TestTemplateLayout extends TemplateLayout {
+
+        TestTemplateLayout(Context context) {
+            super(context, R.layout.test_template, R.id.suw_layout_content);
+            registerMixin(TestMixin.class, new TestMixinSubclass());
+        }
+    }
+
+    private static class TestMixin implements Mixin {}
+
+    private static class TestMixinSubclass extends TestMixin {}
+}