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..3438ed5e4d6df995c75a6a4415913223af719b7d
--- /dev/null
+++ b/libadblockplus-android-tests/src/org/adblockplus/libadblockplus/tests/JsEngineTest.java
@@ -0,0 +1,120 @@
+/*
+ * 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);
+    }
+}