1 files changed, 132 insertions, 0 deletions
diff --git a/tests/src/com/android/launcher3/util/rule/LauncherActivityRule.java b/tests/src/com/android/launcher3/util/rule/LauncherActivityRule.java
new file mode 100644
index 000000000..edd152a2c
--- /dev/null
+++ b/tests/src/com/android/launcher3/util/rule/LauncherActivityRule.java
@@ -0,0 +1,132 @@
+/*
+ * 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.launcher3.util.rule;
+
+import android.app.Activity;
+import android.app.Application;
+import android.app.Application.ActivityLifecycleCallbacks;
+import android.content.Intent;
+import android.os.Bundle;
+import android.support.test.InstrumentationRegistry;
+
+import com.android.launcher3.Launcher;
+import com.android.launcher3.Workspace.ItemOperator;
+
+import org.junit.rules.TestRule;
+import org.junit.runner.Description;
+import org.junit.runners.model.Statement;
+
+import java.util.concurrent.Callable;
+
+/**
+ * Test rule to get the current Launcher activity.
+ */
+public class LauncherActivityRule implements TestRule {
+
+    private Launcher mActivity;
+
+    @Override
+    public Statement apply(Statement base, Description description) {
+        return new MyStatement(base);
+    }
+
+    public Launcher getActivity() {
+        return mActivity;
+    }
+
+    public Callable<Boolean> itemExists(final ItemOperator op) {
+        return new Callable<Boolean>() {
+
+            @Override
+            public Boolean call() throws Exception {
+                Launcher launcher = getActivity();
+                if (launcher == null) {
+                    return false;
+                }
+                return launcher.getWorkspace().getFirstMatch(op) != null;
+            }
+        };
+    }
+
+    /**
+     * Starts the launcher activity in the target package.
+     */
+    public void startLauncher() {
+        InstrumentationRegistry.getInstrumentation().startActivitySync(getHomeIntent());
+    }
+
+    public void returnToHome() {
+        InstrumentationRegistry.getTargetContext().startActivity(getHomeIntent());
+        InstrumentationRegistry.getInstrumentation().waitForIdleSync();
+    }
+
+    public static Intent getHomeIntent() {
+        return new Intent(Intent.ACTION_MAIN)
+                .addCategory(Intent.CATEGORY_HOME)
+                .setPackage(InstrumentationRegistry.getTargetContext().getPackageName())
+                .addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
+    }
+
+    private class MyStatement extends Statement implements ActivityLifecycleCallbacks {
+
+        private final Statement mBase;
+
+        public MyStatement(Statement base) {
+            mBase = base;
+        }
+
+        @Override
+        public void evaluate() throws Throwable {
+            Application app = (Application)
+                    InstrumentationRegistry.getTargetContext().getApplicationContext();
+            app.registerActivityLifecycleCallbacks(this);
+            try {
+                mBase.evaluate();
+            } finally {
+                app.unregisterActivityLifecycleCallbacks(this);
+            }
+        }
+
+        @Override
+        public void onActivityCreated(Activity activity, Bundle bundle) {
+            if (activity instanceof Launcher) {
+                mActivity = (Launcher) activity;
+            }
+        }
+
+        @Override
+        public void onActivityStarted(Activity activity) { }
+
+        @Override
+        public void onActivityResumed(Activity activity) { }
+
+        @Override
+        public void onActivityPaused(Activity activity) { }
+
+        @Override
+        public void onActivityStopped(Activity activity) { }
+
+        @Override
+        public void onActivitySaveInstanceState(Activity activity, Bundle bundle) { }
+
+        @Override
+        public void onActivityDestroyed(Activity activity) {
+            if (activity == mActivity) {
+                mActivity = null;
+            }
+        }
+    }
+}