1 files changed, 80 insertions, 0 deletions
diff --git a/tests/src/com/android/gallery3d/anim/AnimationTest.java b/tests/src/com/android/gallery3d/anim/AnimationTest.java
new file mode 100644
index 000000000..c7d5daec7
--- /dev/null
+++ b/tests/src/com/android/gallery3d/anim/AnimationTest.java
@@ -0,0 +1,80 @@
+/*
+ * Copyright (C) 2010 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.gallery3d.anim;
+
+import android.test.suitebuilder.annotation.SmallTest;
+import android.util.Log;
+import android.view.animation.Interpolator;
+
+import junit.framework.TestCase;
+
+@SmallTest
+public class AnimationTest extends TestCase {
+    private static final String TAG = "AnimationTest";
+
+    public void testFloatAnimation() {
+        FloatAnimation a = new FloatAnimation(0f, 1f, 10);  // value 0 to 1.0, duration 10
+        a.start();                 // start animation
+        assertTrue(a.isActive());  // should be active now
+        a.calculate(0);            // set start time = 0
+        assertTrue(a.get() == 0);  // start value should be 0
+        a.calculate(1);            // calculate value for time 1
+        assertFloatEq(a.get(), 0.1f);
+        a.calculate(5);            // calculate value for time 5
+        assertTrue(a.get() == 0.5);//
+        a.calculate(9);            // calculate value for time 9
+        assertFloatEq(a.get(), 0.9f);
+        a.calculate(10);           // calculate value for time 10
+        assertTrue(!a.isActive()); // should be inactive now
+        assertTrue(a.get() == 1.0);//
+        a.start();                 // restart
+        assertTrue(a.isActive());  // should be active now
+        a.calculate(5);            // set start time = 5
+        assertTrue(a.get() == 0);  // start value should be 0
+        a.calculate(5+9);          // calculate for time 5+9
+        assertFloatEq(a.get(), 0.9f);
+    }
+
+    private static class MyInterpolator implements Interpolator {
+        public float getInterpolation(float input) {
+            return 4f * (input - 0.5f);  // maps [0,1] to [-2,2]
+        }
+    }
+
+    public void testInterpolator() {
+        FloatAnimation a = new FloatAnimation(0f, 1f, 10);  // value 0 to 1.0, duration 10
+        a.setInterpolator(new MyInterpolator());
+        a.start();                 // start animation
+        a.calculate(0);            // set start time = 0
+        assertTrue(a.get() == -2); // start value should be -2
+        a.calculate(1);            // calculate value for time 1
+        assertFloatEq(a.get(), -1.6f);
+        a.calculate(5);            // calculate value for time 5
+        assertTrue(a.get() == 0);  //
+        a.calculate(9);            // calculate value for time 9
+        assertFloatEq(a.get(), 1.6f);
+        a.calculate(10);           // calculate value for time 10
+        assertTrue(a.get() == 2);  //
+    }
+
+    public static void assertFloatEq(float expected, float actual) {
+        if (Math.abs(actual - expected) > 1e-6) {
+            Log.v(TAG, "expected: " + expected + ", actual: " + actual);
+            fail();
+        }
+    }
+}