Java versions of BlimpContents[,Observer] and BlimpNavigationController

blimp/client/app/android/javatests/src/org/chromium/blimp/BlimpNativeInstrumentationTestCase.java

Index: blimp/client/app/android/javatests/src/org/chromium/blimp/BlimpNativeInstrumentationTestCase.java
diff --git a/blimp/client/app/android/javatests/src/org/chromium/blimp/BlimpNativeInstrumentationTestCase.java b/blimp/client/app/android/javatests/src/org/chromium/blimp/BlimpNativeInstrumentationTestCase.java
new file mode 100644
index 0000000000000000000000000000000000000000..8061f82ec88b768efedb54823807d5b69b8a7101
--- /dev/null
+++ b/blimp/client/app/android/javatests/src/org/chromium/blimp/BlimpNativeInstrumentationTestCase.java
@@ -0,0 +1,42 @@
+// 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.blimp;
+
+import android.test.InstrumentationTestCase;
+
+import org.chromium.base.library_loader.ProcessInitException;
+
+import java.util.concurrent.Semaphore;
+
+/**
+ * Base class for loading native library in tests. The setUp() methods must be invoked, and
+ * subclasses can call {@link #waitUntilNativeIsReady()} in the start of each test-method.
+ */
+public class BlimpNativeInstrumentationTestCase extends InstrumentationTestCase {
+    private final Semaphore mNativeReadySemaphore = new Semaphore(0);
+    private boolean mSuccess = false;
+
+    @Override
+    public void setUp() throws ProcessInitException {
+        BlimpLibraryLoader.startAsync(
+                getInstrumentation().getTargetContext(), new BlimpLibraryLoader.Callback() {
+                    public void onStartupComplete(boolean success) {
+                        mSuccess = success;
+                        mNativeReadySemaphore.release();
+                    }
+                });
+    }
+
+    /**
+     * Blocks until the native library startup is complete. If the startup dit not complete
+     * successfully, this method throws a RuntimeException, otherwise it does nothing.
+     * This method should be called in the start of any test method that requires native to be
+     * successfully loaded.
+     */
+    protected final void waitUntilNativeIsReady() throws InterruptedException {
+        mNativeReadySemaphore.acquire();
+        if (!mSuccess) throw new RuntimeException("Native startup failed");
+    }
+}