1 files changed, 154 insertions, 0 deletions
diff --git a/tests/src/com/android/inputmethod/latin/EventRingBufferTests.java b/tests/src/com/android/inputmethod/latin/EventRingBufferTests.java
new file mode 100644
index 000000000..620f036db
--- /dev/null
+++ b/tests/src/com/android/inputmethod/latin/EventRingBufferTests.java
@@ -0,0 +1,154 @@
+/*
+ * Copyright (C) 2010 Google Inc.
+ *
+ * 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.inputmethod.latin;
+
+import com.android.inputmethod.latin.SwipeTracker.EventRingBuffer;
+
+import android.test.AndroidTestCase;
+
+public class EventRingBufferTests extends AndroidTestCase {
+
+    @Override
+    protected void setUp() throws Exception {
+        super.setUp();
+    }
+
+    @Override
+    protected void tearDown() throws Exception {
+        super.tearDown();
+    }
+
+    private static float X_BASE = 1000f;
+
+    private static float Y_BASE = 2000f;
+
+    private static long TIME_BASE = 3000l;
+
+    private static float x(int id) {
+        return X_BASE + id;
+    }
+
+    private static float y(int id) {
+        return Y_BASE + id;
+    }
+
+    private static long time(int id) {
+        return TIME_BASE + id;
+    }
+
+    private static void addEvent(EventRingBuffer buf, int id) {
+        buf.add(x(id), y(id), time(id));
+    }
+
+    private static void assertEventSize(EventRingBuffer buf, int size) {
+        assertEquals(size, buf.size());
+    }
+
+    private static void assertEvent(EventRingBuffer buf, int pos, int id) {
+        assertEquals(x(id), buf.getX(pos), 0f);
+        assertEquals(y(id), buf.getY(pos), 0f);
+        assertEquals(time(id), buf.getTime(pos));
+    }
+
+    public void testClearBuffer() {
+        EventRingBuffer buf = new EventRingBuffer(4);
+        assertEventSize(buf, 0);
+
+        addEvent(buf, 0);
+        addEvent(buf, 1);
+        addEvent(buf, 2);
+        addEvent(buf, 3);
+        addEvent(buf, 4);
+        assertEventSize(buf, 4);
+
+        buf.clear();
+        assertEventSize(buf, 0);
+    }
+
+    public void testRingBuffer() {
+        EventRingBuffer buf = new EventRingBuffer(4);
+        assertEventSize(buf, 0); // [0]
+
+        addEvent(buf, 0);
+        assertEventSize(buf, 1); // [1] 0
+        assertEvent(buf, 0, 0);
+
+        addEvent(buf, 1);
+        addEvent(buf, 2);
+        assertEventSize(buf, 3); // [3] 2 1 0
+        assertEvent(buf, 0, 0);
+        assertEvent(buf, 1, 1);
+        assertEvent(buf, 2, 2);
+
+        addEvent(buf, 3);
+        assertEventSize(buf, 4); // [4] 3 2 1 0
+        assertEvent(buf, 0, 0);
+        assertEvent(buf, 1, 1);
+        assertEvent(buf, 2, 2);
+        assertEvent(buf, 3, 3);
+
+        addEvent(buf, 4);
+        addEvent(buf, 5);
+        assertEventSize(buf, 4); // [4] 5 4|3 2(1 0)
+        assertEvent(buf, 0, 2);
+        assertEvent(buf, 1, 3);
+        assertEvent(buf, 2, 4);
+        assertEvent(buf, 3, 5);
+
+        addEvent(buf, 6);
+        addEvent(buf, 7);
+        addEvent(buf, 8);
+        assertEventSize(buf, 4); // [4] 8 7 6 5|(4 3 2)1|0
+        assertEvent(buf, 0, 5);
+        assertEvent(buf, 1, 6);
+        assertEvent(buf, 2, 7);
+        assertEvent(buf, 3, 8);
+    }
+
+    public void testDropOldest() {
+        EventRingBuffer buf = new EventRingBuffer(4);
+
+        addEvent(buf, 0);
+        assertEventSize(buf, 1); // [1] 0
+        assertEvent(buf, 0, 0);
+
+        buf.dropOldest();
+        assertEventSize(buf, 0); // [0] (0)
+
+        addEvent(buf, 1);
+        addEvent(buf, 2);
+        addEvent(buf, 3);
+        addEvent(buf, 4);
+        assertEventSize(buf, 4); // [4] 4|3 2 1(0)
+        assertEvent(buf, 0, 1);
+
+        buf.dropOldest();
+        assertEventSize(buf, 3); // [3] 4|3 2(1)0
+        assertEvent(buf, 0, 2);
+
+        buf.dropOldest();
+        assertEventSize(buf, 2); // [2] 4|3(2)10
+        assertEvent(buf, 0, 3);
+
+        buf.dropOldest();
+        assertEventSize(buf, 1); // [1] 4|(3)210
+        assertEvent(buf, 0, 4);
+
+        buf.dropOldest();
+        assertEventSize(buf, 0); // [0] (4)|3210
+    }
+}