Open source tests for android/ziputils.

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1 files changed, 116 insertions, 0 deletions

diff --git a/src/test/java/com/google/devtools/build/android/ziputils/ScanUtilTest.java b/src/test/java/com/google/devtools/build/android/ziputils/ScanUtilTest.java
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index 0000000000..2f6be47fd1
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+++ b/src/test/java/com/google/devtools/build/android/ziputils/ScanUtilTest.java
@@ -0,0 +1,116 @@
+// Copyright 2015 Google Inc. All rights reserved.
+//
+// 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.google.devtools.build.android.ziputils;
+
+import static com.google.common.truth.Truth.assertWithMessage;
+import static org.junit.Assert.fail;
+
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.junit.runners.JUnit4;
+
+import java.nio.ByteBuffer;
+import java.util.Arrays;
+
+/**
+ * Unit tests for {@link ScanUtil}.
+ */
+@RunWith(JUnit4.class)
+public class ScanUtilTest {
+
+  @Test
+  public void testScanTo() {
+    try {
+      assertLocation(null, new byte[]{}, -1);
+      fail("No exception on null target");
+    } catch (NullPointerException ex) {
+      // expected
+    }
+    try {
+      assertLocation(new byte[] {}, null, -1);
+      fail("No exception on null domain");
+    } catch (NullPointerException ex) {
+      // expected
+    }
+    assertLocation(new byte[] {}, new byte[] {}, -1);
+    assertLocation(new byte[] {}, new byte[] {1}, 0);
+    assertLocation(new byte[] {}, new byte[] {1, 2, 3, 4}, 0);
+    assertLocation(new byte[] {1}, new byte[] {}, -1);
+    assertLocation(new byte[] {1}, new byte[] {1}, 0);
+    assertLocation(new byte[] {1}, new byte[] {1, 2, 3, 4}, 0);
+    assertLocation(new byte[] {1}, new byte[] {5, 4, 1, 2, 3, 4}, 2);
+    assertLocation(new byte[] {1}, new byte[] {4, 2, 3, 1}, 3);
+    assertLocation(new byte[] {1, 2, 3, 4}, new byte[] {}, -1);
+    assertLocation(new byte[] {1, 2, 3, 4}, new byte[] {1}, -1);
+    assertLocation(new byte[] {1, 2, 3, 4}, new byte[] {1, 2, 3, 4}, 0);
+    assertLocation(new byte[] {1, 2, 3, 4}, new byte[] {1, 2, 3, 4, 1, 2, 3, 4}, 0);
+    assertLocation(new byte[] {1, 2, 3, 4}, new byte[] {5, 1, 2, 3, 4}, 1);
+    assertLocation(new byte[] {1, 2, 3, 4}, new byte[] {5, 1, 2, 3, 4, 5}, 1);
+    assertLocation(new byte[] {1, 2, 3, 4}, new byte[] {5, 5, 1, 2, 3, 4}, 2);
+    assertLocation(new byte[] {1, 2, 3, 4}, new byte[] {5, 1, 1, 2, 3, 4}, 2);
+    assertLocation(new byte[] {1, 2, 3, 4}, new byte[] {5, 1, 2, 3, 5, 4}, -1);
+  }
+
+  @Test
+  public void testScanBackwardsTo() {
+    try {
+      assertBackwardsLocation(null, new byte[]{}, -1);
+      fail("No exception on null target");
+    } catch (NullPointerException ex) {
+      // expected
+    }
+    try {
+      assertBackwardsLocation(new byte[]{}, null, -1);
+      fail("No exception on null domain");
+    } catch (NullPointerException ex) {
+      // expected
+    }
+    assertBackwardsLocation(new byte[] {}, new byte[] {}, -1);
+    assertBackwardsLocation(new byte[] {}, new byte[] {1}, 0);
+    assertBackwardsLocation(new byte[] {}, new byte[] {1, 2, 3, 4}, 3);
+    assertBackwardsLocation(new byte[] {1}, new byte[] {}, -1);
+    assertBackwardsLocation(new byte[] {1}, new byte[] {1}, 0);
+    assertBackwardsLocation(new byte[] {1}, new byte[] {1, 2, 3, 4}, 0);
+    assertBackwardsLocation(new byte[] {1}, new byte[] {5, 4, 1, 2, 3, 4}, 2);
+    assertBackwardsLocation(new byte[] {1}, new byte[] {4, 2, 3, 1}, 3);
+    assertBackwardsLocation(new byte[] {1, 2, 3, 4}, new byte[] {}, -1);
+    assertBackwardsLocation(new byte[] {1, 2, 3, 4}, new byte[] {1}, -1);
+    assertBackwardsLocation(new byte[] {1, 2, 3, 4}, new byte[] {1, 2, 3, 4}, 0);
+    assertBackwardsLocation(new byte[] {1, 2, 3, 4}, new byte[] {1, 2, 3, 4, 1, 2, 3, 4}, 4);
+    assertBackwardsLocation(new byte[] {1, 2, 3, 4}, new byte[] {1, 2, 3, 4, 1, 2, 3, 4, 1}, 4);
+    assertBackwardsLocation(new byte[] {1, 2, 3, 4}, new byte[] {5, 1, 2, 3, 4}, 1);
+    assertBackwardsLocation(new byte[] {1, 2, 3, 4}, new byte[] {5, 1, 2, 3, 4, 5}, 1);
+    assertBackwardsLocation(new byte[] {1, 2, 3, 4}, new byte[] {5, 5, 1, 2, 3, 4}, 2);
+    assertBackwardsLocation(new byte[] {1, 2, 3, 4}, new byte[] {5, 1, 1, 2, 3, 4}, 2);
+    assertBackwardsLocation(new byte[] {1, 2, 3, 4}, new byte[] {5, 1, 2, 3, 5, 4}, -1);
+  }
+
+  private void assertLocation(byte[] target, byte[] domain, int expected) {
+    int pos = ScanUtil.scanTo(target, domain != null ? ByteBuffer.wrap(domain) : null);
+    assertWithMessage("Position of " + Arrays.toString(target) + " in " + Arrays.toString(domain))
+        .that(expected).isEqualTo(pos);
+  }
+
+  private void assertBackwardsLocation(byte[] target, byte[] domain, int expected) {
+    ByteBuffer buf = null;
+    if (domain != null) {
+      buf = ByteBuffer.wrap(domain);
+      buf.position(buf.limit());
+    }
+    int pos = ScanUtil.scanBackwardsTo(target, buf);
+    assertWithMessage("Position of " + Arrays.toString(target) + " in " + Arrays.toString(domain)
+        + ", " + buf.position() + ", " + buf.limit())
+        .that(expected).isEqualTo(pos);
+  }
+}