| // Copyright 2014 The Bazel Authors. 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.lib.unix; |
| |
| import static com.google.common.truth.Truth.assertThat; |
| |
| import com.google.devtools.build.lib.vfs.DigestHashFunction; |
| import com.google.devtools.build.lib.vfs.DigestUtils; |
| import com.google.devtools.build.lib.vfs.FileSystem; |
| import com.google.devtools.build.lib.vfs.FileSystemTest; |
| import com.google.devtools.build.lib.vfs.PathFragment; |
| import com.google.devtools.build.lib.vfs.SyscallCache; |
| import org.junit.Test; |
| |
| /** Test for {@link com.google.devtools.build.lib.unix.UnixFileSystem#getFastDigest}. */ |
| public class UnixDigestHashAttributeNameTest extends FileSystemTest { |
| private static final byte[] FAKE_DIGEST = { |
| 0x18, 0x5f, 0x3d, 0x33, 0x22, 0x71, 0x7e, 0x25, |
| 0x55, 0x61, 0x26, 0x0c, 0x03, 0x6b, 0x2e, 0x26, |
| 0x43, 0x06, 0x7c, 0x30, 0x4e, 0x3a, 0x51, 0x20, |
| 0x07, 0x71, 0x76, 0x48, 0x26, 0x38, 0x19, 0x69, |
| }; |
| |
| @Override |
| protected FileSystem getFreshFileSystem(DigestHashFunction digestHashFunction) { |
| return new FakeAttributeFileSystem(digestHashFunction); |
| } |
| |
| @Test |
| public void testFoo() throws Exception { |
| // Instead of actually trying to access this file, a call to getxattr() should be made. We |
| // intercept this call and return a fake extended attribute value, thereby causing the checksum |
| // computation to be skipped entirely. |
| assertThat( |
| DigestUtils.getDigestWithManualFallback( |
| absolutize("myfile"), 123, SyscallCache.NO_CACHE)) |
| .isEqualTo(FAKE_DIGEST); |
| } |
| |
| private class FakeAttributeFileSystem extends UnixFileSystem { |
| public FakeAttributeFileSystem(DigestHashFunction hashFunction) { |
| super(hashFunction, "user.checksum.sha256"); |
| } |
| |
| @Override |
| public byte[] getxattr(PathFragment path, String name, boolean followSymlinks) { |
| assertThat(path).isEqualTo(absolutize("myfile").asFragment()); |
| assertThat(name).isEqualTo("user.checksum.sha256"); |
| assertThat(followSymlinks).isTrue(); |
| return FAKE_DIGEST; |
| } |
| } |
| } |