Add perf test to measure duration of blob store digest computation.
+ Move BlobStoreTestUtils from cts/ to frameworks/base/tests/.
Bug: 148898557
Test: atest ./apct-tests/perftests/blobstore/src/com/android/perftests/blob/BlobStorePerfTests.java
Change-Id: I2de155d0c0c1fb602c57353ba4819bdc9cda8c0a
diff --git a/tests/BlobStoreTestUtils/Android.bp b/tests/BlobStoreTestUtils/Android.bp
new file mode 100644
index 0000000..edd2b43
--- /dev/null
+++ b/tests/BlobStoreTestUtils/Android.bp
@@ -0,0 +1,20 @@
+// Copyright (C) 2020 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.
+
+java_library {
+ name: "BlobStoreTestUtils",
+ srcs: ["src/**/*.java"],
+ static_libs: ["truth-prebuilt"],
+ platform_apis: true
+}
\ No newline at end of file
diff --git a/tests/BlobStoreTestUtils/src/com/android/utils/blob/DummyBlobData.java b/tests/BlobStoreTestUtils/src/com/android/utils/blob/DummyBlobData.java
new file mode 100644
index 0000000..f96766a
--- /dev/null
+++ b/tests/BlobStoreTestUtils/src/com/android/utils/blob/DummyBlobData.java
@@ -0,0 +1,227 @@
+/*
+ * Copyright 2020 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.utils.blob;
+
+import static com.google.common.truth.Truth.assertThat;
+
+import android.app.blob.BlobHandle;
+import android.app.blob.BlobStoreManager;
+import android.content.Context;
+import android.os.FileUtils;
+import android.os.ParcelFileDescriptor;
+
+import java.io.BufferedInputStream;
+import java.io.File;
+import java.io.FileDescriptor;
+import java.io.FileInputStream;
+import java.io.FileOutputStream;
+import java.io.InputStream;
+import java.io.OutputStream;
+import java.io.RandomAccessFile;
+import java.nio.file.Files;
+import java.security.MessageDigest;
+import java.util.Random;
+import java.util.concurrent.TimeUnit;
+
+public class DummyBlobData {
+ private static final long DEFAULT_SIZE_BYTES = 10 * 1024L * 1024L;
+ private static final int BUFFER_SIZE_BYTES = 16 * 1024;
+
+ private final Context mContext;
+ private final Random mRandom;
+ private final File mFile;
+ private final long mFileSize;
+ private final String mLabel;
+
+ byte[] mFileDigest;
+ long mExpiryTimeMs;
+
+ public DummyBlobData(Context context) {
+ this(context, new Random(0), "blob_" + System.nanoTime());
+ }
+
+ public DummyBlobData(Context context, long fileSize) {
+ this(context, fileSize, new Random(0), "blob_" + System.nanoTime(), "Test label");
+ }
+
+ public DummyBlobData(Context context, Random random, String fileName) {
+ this(context, DEFAULT_SIZE_BYTES, random, fileName, "Test label");
+ }
+
+ public DummyBlobData(Context context, Random random, String fileName, String label) {
+ this(context, DEFAULT_SIZE_BYTES, random, fileName, label);
+ }
+
+ public DummyBlobData(Context context, long fileSize, Random random, String fileName,
+ String label) {
+ mContext = context;
+ mRandom = random;
+ mFile = new File(mContext.getFilesDir(), fileName);
+ mFileSize = fileSize;
+ mLabel = label;
+ }
+
+ public void prepare() throws Exception {
+ try (RandomAccessFile file = new RandomAccessFile(mFile, "rw")) {
+ writeRandomData(file, mFileSize);
+ }
+ mFileDigest = FileUtils.digest(mFile, "SHA-256");
+ mExpiryTimeMs = System.currentTimeMillis() + TimeUnit.DAYS.toMillis(1);
+ }
+
+ public BlobHandle getBlobHandle() throws Exception {
+ return BlobHandle.createWithSha256(createSha256Digest(mFile), mLabel,
+ mExpiryTimeMs, "test_tag");
+ }
+
+ public long getFileSize() throws Exception {
+ return mFileSize;
+ }
+
+ public long getExpiryTimeMillis() {
+ return mExpiryTimeMs;
+ }
+
+ public void delete() {
+ mFile.delete();
+ }
+
+ public void writeToSession(BlobStoreManager.Session session) throws Exception {
+ writeToSession(session, 0, mFileSize);
+ }
+
+ public void writeToSession(BlobStoreManager.Session session,
+ long offsetBytes, long lengthBytes) throws Exception {
+ try (FileInputStream in = new FileInputStream(mFile)) {
+ in.getChannel().position(offsetBytes);
+ try (FileOutputStream out = new ParcelFileDescriptor.AutoCloseOutputStream(
+ session.openWrite(offsetBytes, lengthBytes))) {
+ copy(in, out, lengthBytes);
+ }
+ }
+ }
+
+ public void writeToFd(FileDescriptor fd, long offsetBytes, long lengthBytes) throws Exception {
+ try (FileInputStream in = new FileInputStream(mFile)) {
+ in.getChannel().position(offsetBytes);
+ try (FileOutputStream out = new FileOutputStream(fd)) {
+ copy(in, out, lengthBytes);
+ }
+ }
+ }
+
+ private void copy(InputStream in, OutputStream out, long lengthBytes) throws Exception {
+ final byte[] buffer = new byte[BUFFER_SIZE_BYTES];
+ long bytesWrittern = 0;
+ while (bytesWrittern < lengthBytes) {
+ final int toWrite = (bytesWrittern + buffer.length <= lengthBytes)
+ ? buffer.length : (int) (lengthBytes - bytesWrittern);
+ in.read(buffer, 0, toWrite);
+ out.write(buffer, 0, toWrite);
+ bytesWrittern += toWrite;
+ }
+ }
+
+ public void readFromSessionAndVerifyBytes(BlobStoreManager.Session session,
+ long offsetBytes, int lengthBytes) throws Exception {
+ final byte[] expectedBytes = new byte[lengthBytes];
+ try (FileInputStream in = new FileInputStream(mFile)) {
+ read(in, expectedBytes, offsetBytes, lengthBytes);
+ }
+
+ final byte[] actualBytes = new byte[lengthBytes];
+ try (FileInputStream in = new ParcelFileDescriptor.AutoCloseInputStream(
+ session.openWrite(0L, 0L))) {
+ read(in, actualBytes, offsetBytes, lengthBytes);
+ }
+
+ assertThat(actualBytes).isEqualTo(expectedBytes);
+
+ }
+
+ private void read(FileInputStream in, byte[] buffer,
+ long offsetBytes, int lengthBytes) throws Exception {
+ in.getChannel().position(offsetBytes);
+ in.read(buffer, 0, lengthBytes);
+ }
+
+ public void readFromSessionAndVerifyDigest(BlobStoreManager.Session session)
+ throws Exception {
+ readFromSessionAndVerifyDigest(session, 0, mFile.length());
+ }
+
+ public void readFromSessionAndVerifyDigest(BlobStoreManager.Session session,
+ long offsetBytes, long lengthBytes) throws Exception {
+ final byte[] actualDigest;
+ try (FileInputStream in = new ParcelFileDescriptor.AutoCloseInputStream(
+ session.openWrite(0L, 0L))) {
+ actualDigest = createSha256Digest(in, offsetBytes, lengthBytes);
+ }
+
+ assertThat(actualDigest).isEqualTo(mFileDigest);
+ }
+
+ public void verifyBlob(ParcelFileDescriptor pfd) throws Exception {
+ final byte[] actualDigest;
+ try (FileInputStream in = new ParcelFileDescriptor.AutoCloseInputStream(pfd)) {
+ actualDigest = FileUtils.digest(in, "SHA-256");
+ }
+ assertThat(actualDigest).isEqualTo(mFileDigest);
+ }
+
+ private byte[] createSha256Digest(FileInputStream in, long offsetBytes, long lengthBytes)
+ throws Exception {
+ final MessageDigest digest = MessageDigest.getInstance("SHA-256");
+ in.getChannel().position(offsetBytes);
+ final byte[] buffer = new byte[BUFFER_SIZE_BYTES];
+ long bytesRead = 0;
+ while (bytesRead < lengthBytes) {
+ int toRead = (bytesRead + buffer.length <= lengthBytes)
+ ? buffer.length : (int) (lengthBytes - bytesRead);
+ toRead = in.read(buffer, 0, toRead);
+ digest.update(buffer, 0, toRead);
+ bytesRead += toRead;
+ }
+ return digest.digest();
+ }
+
+ private byte[] createSha256Digest(File file) throws Exception {
+ final MessageDigest digest = MessageDigest.getInstance("SHA-256");
+ try (BufferedInputStream in = new BufferedInputStream(
+ Files.newInputStream(file.toPath()))) {
+ final byte[] buffer = new byte[BUFFER_SIZE_BYTES];
+ int bytesRead;
+ while ((bytesRead = in.read(buffer)) > 0) {
+ digest.update(buffer, 0, bytesRead);
+ }
+ }
+ return digest.digest();
+ }
+
+ private void writeRandomData(RandomAccessFile file, long fileSize)
+ throws Exception {
+ long bytesWritten = 0;
+ final byte[] buffer = new byte[BUFFER_SIZE_BYTES];
+ while (bytesWritten < fileSize) {
+ mRandom.nextBytes(buffer);
+ final int toWrite = (bytesWritten + buffer.length <= fileSize)
+ ? buffer.length : (int) (fileSize - bytesWritten);
+ file.seek(bytesWritten);
+ file.write(buffer, 0, toWrite);
+ bytesWritten += toWrite;
+ }
+ }
+}