Expose the Site Engagement Service to Java.

chrome/android/javatests/src/org/chromium/chrome/browser/engagement/SiteEngagementServiceTest.java

Index: chrome/android/javatests/src/org/chromium/chrome/browser/engagement/SiteEngagementServiceTest.java
diff --git a/chrome/android/javatests/src/org/chromium/chrome/browser/engagement/SiteEngagementServiceTest.java b/chrome/android/javatests/src/org/chromium/chrome/browser/engagement/SiteEngagementServiceTest.java
new file mode 100644
index 0000000000000000000000000000000000000000..d1ae2916ca2dd739680e9aa9189469dc3338d417
--- /dev/null
+++ b/chrome/android/javatests/src/org/chromium/chrome/browser/engagement/SiteEngagementServiceTest.java
@@ -0,0 +1,53 @@
+// 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.engagement;
+
+import android.test.suitebuilder.annotation.MediumTest;
+
+import org.chromium.base.test.util.Feature;
+import org.chromium.chrome.browser.ChromeActivity;
+import org.chromium.chrome.test.ChromeActivityTestCaseBase;
+
+/**
+ * Test for the Site Engagement Service Java binding.
+ */
+public class SiteEngagementServiceTest extends ChromeActivityTestCaseBase<ChromeActivity> {
+
+    public SiteEngagementServiceTest() {
+        super(ChromeActivity.class);
+    }
+
+    /**
+     * Verify that setting the engagement score for a URL and reading it back it works.
+     */
+    @MediumTest

[gone, 2016/12/07 21:50:26]

Don't think MediumTest is required nowadays; it's deprecated AFAICT.

[dominickn, 2016/12/08 01:03:54]

The test runner errors out without the annotation:

MissingSizeAnnotationError:
org.chromium.chrome.browser.engagement.SiteEngagementServiceTest#testSettingAndRetrievingScore:
Test method is missing required size annotation. Add one of: @LargeTest,
@PerfTest, @Manual, @FlakyTest, @DisabledTest, @MediumTest, @Smoke, @SmallTest,
@IntegrationTest, @EnormousTest

+    @Feature({"Engagement"})
+    public void testSettingAndRetrievingScore() {
+        try {
+            runTestOnUiThread(new Runnable() {

[gone, 2016/12/07 21:50:26]

Can you just use the @UiThreadTest annotation?

[dominickn, 2016/12/08 01:03:54]

New annotation learned! \o/

+                @Override
+                public void run() {
+                    final String url = "https://www.google.com";
+                    SiteEngagementService service = SiteEngagementService.getForProfile(
+                            getActivity().getActivityTab().getProfile());
+
+                    assertEquals(0.0, service.getScore(url));
+                    service.resetScoreForUrl(url, 5.0);
+                    assertEquals(5.0, service.getScore(url));
+
+                    service.resetScoreForUrl(url, 2.0);
+                    assertEquals(2.0, service.getScore(url));
+                }
+            });
+        } catch (Throwable t) {
+            fail(t.getMessage());
+        }
+    }
+
+    @Override
+    public void startMainActivity() throws InterruptedException {
+        startMainActivityOnBlankPage();
+    }
+}