New helper class BitMask

Helpful for translating bit flags.

Test: New unit test
Bug: 34902105
Change-Id: Id5bdcc0b22c3171fb3111d4fd3343f74de059ea1

1 files changed, 39 insertions, 0 deletions

diff --git a/tests/wifitests/src/com/android/server/wifi/util/BitMaskTest.java b/tests/wifitests/src/com/android/server/wifi/util/BitMaskTest.java
new file mode 100644
index 000000000..af7ad04db
--- /dev/null
+++ b/tests/wifitests/src/com/android/server/wifi/util/BitMaskTest.java
@@ -0,0 +1,39 @@
+/*
+ * Copyright (C) 2017 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.server.wifi.util;
+
+import org.junit.Assert;
+import org.junit.Test;
+
+/**
+ * Unit tests for {@link com.android.server.wifi.util.BitMask}.
+ */
+public class BitMaskTest {
+    /**
+     * Test that checkoff.testAndClear works as advertised
+     */
+    @Test
+    public void testBitMask() throws Exception {
+
+        BitMask checkoff = new BitMask(0x53);
+
+        Assert.assertTrue(checkoff.testAndClear(0x10)); // First time, bit should be there
+        Assert.assertFalse(checkoff.testAndClear(0x10)); // Second time, should be gone
+        Assert.assertFalse(checkoff.testAndClear(0x100)); // This bit was not set
+        Assert.assertEquals(0x43, checkoff.value); // These should be left
+    }
+}