Snackbar for promoting Data Saver to existing users

chrome/android/javatests/src/org/chromium/chrome/browser/snackbar/DataReductionPromoSnackbarControllerTest.java

+// Copyright 2016 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+package org.chromium.chrome.browser.snackbar;
+
+import android.test.UiThreadTest;
+import android.test.suitebuilder.annotation.MediumTest;
+
+import org.chromium.base.ContextUtils;
+import org.chromium.base.metrics.RecordHistogram;
+import org.chromium.base.test.util.CommandLineFlags;
+import org.chromium.chrome.browser.preferences.datareduction.DataReductionPromoUtils;
+import org.chromium.chrome.browser.preferences.datareduction.DataReductionProxyUma;
+import org.chromium.chrome.test.ChromeTabbedActivityTestBase;
+
+/**
+ * Tests the DataReductionPromoSnackbarController. Tests that the snackbar sizes are properly set
+ * from a field trial param and that the correct uma is recorded.
+ */
+public class DataReductionPromoSnackbarControllerTest extends ChromeTabbedActivityTestBase {
+
+    private static final int BYTES_IN_MB = 1024 * 1024;
+    private static final int FIRST_SNACKBAR_SIZE_MB = 100;
+    private static final int SECOND_SNACKBAR_SIZE_MB = 1024;
+
+    private SnackbarManager mManager;
+    private DataReductionPromoSnackbarController mController;
+
+    @Override
+    public void startMainActivity() throws InterruptedException {
+        ContextUtils.getAppSharedPreferences().edit().clear().apply();
+        SnackbarManager.setDurationForTesting(1000);
+        startMainActivityOnBlankPage();
+        mManager = getActivity().getSnackbarManager();
+        mController = new DataReductionPromoSnackbarController(getActivity(), mManager);
+    }
+
+    @UiThreadTest
+    @MediumTest
+    @CommandLineFlags.Add({
+            "force-fieldtrials=" + DataReductionPromoSnackbarController.PROMO_FIELD_TRIAL_NAME
+                    + "/Enabled",
+            "force-fieldtrial-params=" + DataReductionPromoSnackbarController.PROMO_FIELD_TRIAL_NAME
+                    + ".Enabled:"
+                    + DataReductionPromoSnackbarController.PROMO_PARAM_NAME + "/"
+                    + FIRST_SNACKBAR_SIZE_MB + ";"
+                    + SECOND_SNACKBAR_SIZE_MB })
+    public void testDataReductionPromoSnackbarController() {
+        assertFalse(DataReductionPromoUtils.hasSnackbarPromoBeenInitWithStartingContentLength());
+
+        mController.maybeShowDataReductionPromoSnackbar(0);
+
+        assertFalse(mManager.isShowing());
+        assertTrue(DataReductionPromoUtils.hasSnackbarPromoBeenInitWithStartingContentLength());
+        assertEquals(0, DataReductionPromoUtils.getDisplayedSnackbarPromoContentLength());
+
+        mController.maybeShowDataReductionPromoSnackbar(FIRST_SNACKBAR_SIZE_MB * BYTES_IN_MB);
+
+        assertTrue(mManager.isShowing());
+        assertEquals(FIRST_SNACKBAR_SIZE_MB * BYTES_IN_MB,
+                DataReductionPromoUtils.getDisplayedSnackbarPromoContentLength());
+        mManager.dismissSnackbars(mController);
+
+        mController.maybeShowDataReductionPromoSnackbar(SECOND_SNACKBAR_SIZE_MB * BYTES_IN_MB);
+
+        assertTrue(mManager.isShowing());
+        assertEquals(SECOND_SNACKBAR_SIZE_MB * BYTES_IN_MB,
+                DataReductionPromoUtils.getDisplayedSnackbarPromoContentLength());
+    }
+
+    @UiThreadTest
+    @MediumTest
+    @CommandLineFlags.Add({
+            "force-fieldtrials=" + DataReductionPromoSnackbarController.PROMO_FIELD_TRIAL_NAME
+                    + "/Enabled",
+            "force-fieldtrial-params=" + DataReductionPromoSnackbarController.PROMO_FIELD_TRIAL_NAME
+                    + ".Enabled:"
+                    + DataReductionPromoSnackbarController.PROMO_PARAM_NAME + "/"
+                    + FIRST_SNACKBAR_SIZE_MB + ";"
+                    + SECOND_SNACKBAR_SIZE_MB })
+    public void testDataReductionPromoSnackbarControllerExistingUser() {
+        assertFalse(DataReductionPromoUtils.hasSnackbarPromoBeenInitWithStartingContentLength());
+
+        mController.maybeShowDataReductionPromoSnackbar(SECOND_SNACKBAR_SIZE_MB * BYTES_IN_MB);
+
+        assertFalse(mManager.isShowing());
+        assertTrue(DataReductionPromoUtils.hasSnackbarPromoBeenInitWithStartingContentLength());
+        assertEquals(SECOND_SNACKBAR_SIZE_MB * BYTES_IN_MB,
+                DataReductionPromoUtils.getDisplayedSnackbarPromoContentLength());
+
+        mController.maybeShowDataReductionPromoSnackbar(SECOND_SNACKBAR_SIZE_MB * BYTES_IN_MB + 1);
+
+        assertFalse(mManager.isShowing());
+        assertEquals(SECOND_SNACKBAR_SIZE_MB * BYTES_IN_MB,
+                DataReductionPromoUtils.getDisplayedSnackbarPromoContentLength());
+    }
+
+    @UiThreadTest
+    @MediumTest
+    @CommandLineFlags.Add({
+            "force-fieldtrials=" + DataReductionPromoSnackbarController.PROMO_FIELD_TRIAL_NAME
+                    + "/Enabled",
+            "force-fieldtrial-params=" + DataReductionPromoSnackbarController.PROMO_FIELD_TRIAL_NAME
+                    + ".Enabled:"
+                    + DataReductionPromoSnackbarController.PROMO_PARAM_NAME + "/"
+                    + FIRST_SNACKBAR_SIZE_MB + ";"
+                    + SECOND_SNACKBAR_SIZE_MB })
+    public void testDataReductionPromoSnackbarControllerHistograms() {
+        assertFalse(DataReductionPromoUtils.hasSnackbarPromoBeenInitWithStartingContentLength());
+
+        mController.maybeShowDataReductionPromoSnackbar(0);
+
+        assertTrue(DataReductionPromoUtils.hasSnackbarPromoBeenInitWithStartingContentLength());
+        assertEquals(0, RecordHistogram
+                .getHistogramValueCountForTesting(DataReductionProxyUma.SNACKBAR_HISTOGRAM_NAME,
+                        0));
+
+        mController.maybeShowDataReductionPromoSnackbar(FIRST_SNACKBAR_SIZE_MB * BYTES_IN_MB);
+
+        assertTrue(mManager.isShowing());
+        assertEquals(1, RecordHistogram
+                .getHistogramValueCountForTesting(DataReductionProxyUma.SNACKBAR_HISTOGRAM_NAME,
+                        FIRST_SNACKBAR_SIZE_MB));
+        mManager.getCurrentSnackbarForTesting().getController().onDismissNoAction(null);
+        assertEquals(1, RecordHistogram
+                .getHistogramValueCountForTesting(DataReductionProxyUma.UI_ACTION_HISTOGRAM_NAME,
+                        DataReductionProxyUma.ACTION_SNACKBAR_DISMISSED));
+
+        mController.maybeShowDataReductionPromoSnackbar(SECOND_SNACKBAR_SIZE_MB * BYTES_IN_MB);
+
+        assertTrue(mManager.isShowing());
+        assertEquals(1, RecordHistogram
+                .getHistogramValueCountForTesting(DataReductionProxyUma.SNACKBAR_HISTOGRAM_NAME,
+                        SECOND_SNACKBAR_SIZE_MB));
+        mManager.getCurrentSnackbarForTesting().getController().onAction(null);
+        // The dismissed histogram should not have been incremented.
+        assertEquals(1, RecordHistogram
+                .getHistogramValueCountForTesting(DataReductionProxyUma.UI_ACTION_HISTOGRAM_NAME,
+                        DataReductionProxyUma.ACTION_SNACKBAR_DISMISSED));
+    }
+}