1 files changed, 58 insertions, 0 deletions
diff --git a/tests/AndroidTests/src/com/android/unit_tests/CharSequencesTest.java b/tests/AndroidTests/src/com/android/unit_tests/CharSequencesTest.java
new file mode 100644
index 0000000..092f309
--- /dev/null
+++ b/tests/AndroidTests/src/com/android/unit_tests/CharSequencesTest.java
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+/*
+ * Copyright (C) 2007 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.unit_tests;
+
+import com.android.internal.util.CharSequences;
+import static com.android.internal.util.CharSequences.forAsciiBytes;
+import junit.framework.TestCase;
+import android.test.suitebuilder.annotation.SmallTest;
+
+public class CharSequencesTest extends TestCase {
+
+    @SmallTest
+    public void testCharSequences() {
+        String s = "Crazy Bob";
+        byte[] bytes = s.getBytes();
+
+        String copy = toString(forAsciiBytes(bytes));
+        assertTrue(s.equals(copy));
+
+        copy = toString(forAsciiBytes(bytes, 0, s.length()));
+        assertTrue(s.equals(copy));
+
+        String crazy = toString(forAsciiBytes(bytes, 0, 5));
+        assertTrue("Crazy".equals(crazy));
+
+        String a = toString(forAsciiBytes(bytes, 0, 3).subSequence(2, 3));
+        assertTrue("a".equals(a));
+
+        String empty = toString(forAsciiBytes(bytes, 0, 3).subSequence(3, 3));
+        assertTrue("".equals(empty));
+
+        assertTrue(CharSequences.equals("bob", "bob"));
+        assertFalse(CharSequences.equals("b", "bob"));
+        assertFalse(CharSequences.equals("", "bob"));
+    }
+
+    /**
+     * Converts a CharSequence to a string the slow way. Useful for testing
+     * a CharSequence implementation.
+     */
+    static String toString(CharSequence charSequence) {
+        return new StringBuilder().append(charSequence).toString();
+    }
+}