Issue 4031 - Implement tests for libadblockplus-android

libadblockplus-android-tests/src/org/adblockplus/libadblockplus/tests/JsEngineTest.java

Index: libadblockplus-android-tests/src/org/adblockplus/libadblockplus/tests/JsEngineTest.java
diff --git a/libadblockplus-android-tests/src/org/adblockplus/libadblockplus/tests/JsEngineTest.java b/libadblockplus-android-tests/src/org/adblockplus/libadblockplus/tests/JsEngineTest.java
new file mode 100644
index 0000000000000000000000000000000000000000..a70aacd3ce944d95a8b62fbdf79b6d8c31d433f4
--- /dev/null
+++ b/libadblockplus-android-tests/src/org/adblockplus/libadblockplus/tests/JsEngineTest.java
@@ -0,0 +1,133 @@
+/*
+ * This file is part of Adblock Plus <https://adblockplus.org/>,
+ * Copyright (C) 2006-2016 Eyeo GmbH
+ *
+ * Adblock Plus is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 3 as
+ * published by the Free Software Foundation.
+ *
+ * Adblock Plus is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with Adblock Plus.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+package org.adblockplus.libadblockplus.tests;
+
+import org.adblockplus.libadblockplus.AdblockPlusException;
+import org.adblockplus.libadblockplus.EventCallback;
+import org.adblockplus.libadblockplus.JsValue;
+
+import org.junit.Test;
+
+import java.util.List;
+
+public class JsEngineTest extends BaseJsTest
+{
+  @Test
+  public void testEvaluate()
+  {
+    jsEngine.evaluate("function hello() { return 'Hello'; }");
+    JsValue result = jsEngine.evaluate("hello()");
+    assertTrue(result.isString());
+    assertEquals("Hello", result.asString());
+  }
+
+  @Test
+  public void testRuntimeExceptionIsThrown()
+  {
+    try
+    {
+      jsEngine.evaluate("doesnotexist()");
+      fail();
+    }
+    catch (AdblockPlusException e)
+    {
+      // ignored
+    }
+  }
+
+  @Test
+  public void testCompileTimeExceptionIsThrown()
+  {
+    try
+    {
+      jsEngine.evaluate("'foo'bar'");
+      fail();
+    }
+    catch (AdblockPlusException e)
+    {
+      // ignored
+    }
+  }
+
+  @Test
+  public void testValueCreation()
+  {
+    JsValue value;
+
+    final String STRING_VALUE = "foo";
+    value = jsEngine.newValue(STRING_VALUE);
+    assertTrue(value.isString());
+    assertEquals(STRING_VALUE, value.asString());
+
+    final long LONG_VALUE = 12345678901234l;
+    value = jsEngine.newValue(LONG_VALUE);
+    assertTrue(value.isNumber());
+    assertEquals(LONG_VALUE, value.asLong());
+
+    final boolean BOOLEAN_VALUE = true;
+    value = jsEngine.newValue(BOOLEAN_VALUE);
+    assertTrue(value.isBoolean());
+    assertEquals(BOOLEAN_VALUE, value.asBoolean());
+  }
+
+  private boolean callbackCalled;
+  private List<JsValue> callbackParams;
+  private EventCallback callback = new EventCallback()
+  {
+    @Override
+    public void eventCallback(List<JsValue> params)
+    {
+      callbackCalled = true;
+      callbackParams = params;
+    }
+  };
+
+  @Test
+  public void testEventCallbacks()
+  {
+    callbackCalled = false;
+
+    // Trigger event without a callback
+    callbackCalled = false;
+    jsEngine.evaluate("_triggerEvent('foobar')");
+    assertFalse(callbackCalled);
+
+    // Set callback
+    final String EVENT_NAME = "foobar";
+    jsEngine.setEventCallback(EVENT_NAME, callback);
+    callbackCalled = false;
+    jsEngine.evaluate("_triggerEvent('foobar', 1, 'x', true)");
+    assertTrue(callbackCalled);
+    assertNotNull(callbackParams);
+    assertEquals(3, callbackParams.size());
+    assertEquals(1, callbackParams.get(0).asLong());
+    assertEquals("x", callbackParams.get(1).asString());
+    assertTrue(callbackParams.get(2).asBoolean());
+
+    // Trigger a different event
+    callbackCalled = false;
+    jsEngine.evaluate("_triggerEvent('barfoo')");
+    assertFalse(callbackCalled);
+
+    // Remove callback
+    jsEngine.removeEventCallback(EVENT_NAME);
+    callbackCalled = false;
+    jsEngine.evaluate("_triggerEvent('foobar')");
+    assertFalse(callbackCalled);
+  }
+}