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/*
* Copyright Amazon.com, Inc. or its affiliates. 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.
* A copy of the License is located at
*
* http://aws.amazon.com/apache2.0
*
* or in the "license" file accompanying this file. This file 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 software.amazon.awssdk.testutils;
import static org.junit.Assert.assertNotNull;
import static org.junit.Assert.assertTrue;
import static org.junit.Assert.fail;
import java.io.ByteArrayInputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStream;
import java.nio.charset.StandardCharsets;
import java.security.NoSuchAlgorithmException;
import java.util.Arrays;
import org.junit.Assert;
import software.amazon.awssdk.utils.IoUtils;
public final class SdkAsserts {
private SdkAsserts() {
}
/**
* Asserts that the specified String is not null and not empty.
*
* @param str
* The String to test.
* @deprecated Use Hamcrest Matchers instead
*/
@Deprecated
public static void assertNotEmpty(String str) {
assertNotNull(str);
assertTrue(str.length() > 0);
}
/**
* Asserts that the contents in the specified file are exactly equal to the contents read from
* the specified input stream. The input stream will be closed at the end of this method. If any
* problems are encountered, or the stream's contents don't match up exactly with the file's
* contents, then this method will fail the current test.
*
* @param expected
* The file containing the expected contents.
* @param actual
* The stream that will be read, compared to the expected file contents, and finally
* closed.
*/
public static void assertFileEqualsStream(File expected, InputStream actual) {
assertFileEqualsStream(null, expected, actual);
}
/**
* Asserts that the contents in the specified file are exactly equal to the contents read from
* the specified input stream. The input stream will be closed at the end of this method. If any
* problems are encountered, or the stream's contents don't match up exactly with the file's
* contents, then this method will fail the current test.
*
* @param errmsg
* error message to be thrown when the assertion fails.
* @param expected
* The file containing the expected contents.
* @param actual
* The stream that will be read, compared to the expected file contents, and finally
* closed.
*/
public static void assertFileEqualsStream(String errmsg, File expected, InputStream actual) {
try {
InputStream expectedInputStream = new FileInputStream(expected);
assertStreamEqualsStream(errmsg, expectedInputStream, actual);
} catch (FileNotFoundException e) {
fail("Expected file " + expected.getAbsolutePath() + " doesn't exist: " + e.getMessage());
}
}
/**
* Asserts that the contents in the specified input streams are same. The input streams will be
* closed at the end of this method. If any problems are encountered, or the stream's contents
* don't match up exactly with the file's contents, then this method will fail the current test.
*
* @param expected
* expected input stream. The stream will be closed at the end.
* @param actual
* The stream that will be read, compared to the expected file contents, and finally
* closed.
*/
public static void assertStreamEqualsStream(InputStream expected, InputStream actual) {
assertStreamEqualsStream(null, expected, actual);
}
/**
* Asserts that the contents in the specified input streams are same. The input streams will be
* closed at the end of this method. If any problems are encountered, or the stream's contents
* don't match up exactly with the file's contents, then this method will fail the current test.
*
* @param errmsg
* error message to be thrown when the assertion fails.
* @param expectedInputStream
* expected input stream. The stream will be closed at the end.
* @param inputStream
* The stream that will be read, compared to the expected file contents, and finally
* closed.
*/
public static void assertStreamEqualsStream(String errmsg,
InputStream expectedInputStream,
InputStream inputStream) {
try {
assertTrue(errmsg, doesStreamEqualStream(expectedInputStream, inputStream));
} catch (IOException e) {
fail("Error reading from stream: " + e.getMessage());
}
}
/**
* Asserts that the contents of the two files are same.
*
* @param expected
* expected file.
* @param actual
* actual file.
*/
public static void assertFileEqualsFile(File expected, File actual) {
if (expected == null || !expected.exists()) {
fail("Expected file doesn't exist");
}
if (actual == null || !actual.exists()) {
fail("Actual file doesn't exist");
}
long expectedFileLen = expected.length();
long fileLen = actual.length();
Assert.assertTrue("expectedFileLen=" + expectedFileLen + ", fileLen=" + fileLen + ", expectedFile=" + expected
+ ", file=" + actual, expectedFileLen == fileLen);
try (InputStream expectedIs = new FileInputStream(expected); InputStream actualIs = new FileInputStream(actual)) {
assertStreamEqualsStream("expected file: " + expected + " vs. actual file: " + actual,
expectedIs, actualIs);
} catch (IOException e) {
fail("Unable to compare files: " + e.getMessage());
}
}
/**
* Asserts that the contents in the specified string are exactly equal to the contents read from
* the specified input stream. The input stream will be closed at the end of this method. If any
* problems are encountered, or the stream's contents don't match up exactly with the string's
* contents, then this method will fail the current test.
*
* @param expected
* The string containing the expected data.
* @param actual
* The stream that will be read, compared to the expected string data, and finally
* closed.
*/
public static void assertStringEqualsStream(String expected, InputStream actual) {
try {
InputStream expectedInputStream = new ByteArrayInputStream(expected.getBytes(StandardCharsets.UTF_8));
assertTrue(doesStreamEqualStream(expectedInputStream, actual));
} catch (IOException e) {
fail("Error reading from stream: " + e.getMessage());
}
}
/**
* Returns true if, and only if, the contents read from the specified input streams are exactly
* equal. Both input streams will be closed at the end of this method.
*
* @param expected
* The input stream containing the expected contents.
* @param actual
* The stream that will be read, compared to the expected file contents, and finally
* closed.
* @return True if the two input streams contain the same data.
* @throws IOException
* If any problems are encountered comparing the file and stream.
*/
public static boolean doesStreamEqualStream(InputStream expected, InputStream actual) throws IOException {
try {
byte[] expectedDigest = InputStreamUtils.calculateMD5Digest(expected);
byte[] actualDigest = InputStreamUtils.calculateMD5Digest(actual);
return Arrays.equals(expectedDigest, actualDigest);
} catch (NoSuchAlgorithmException nse) {
throw new RuntimeException(nse.getMessage(), nse);
} finally {
IoUtils.closeQuietly(expected, null);
IoUtils.closeQuietly(actual, null);
}
}
/**
* Returns true if, and only if, the contents in the specified file are exactly equal to the
* contents read from the specified input stream. The input stream will be closed at the end of
* this method.
*
* @param expectedFile
* The file containing the expected contents.
* @param inputStream
* The stream that will be read, compared to the expected file contents, and finally
* closed.
* @throws IOException
* If any problems are encountered comparing the file and stream.
*/
public static boolean doesFileEqualStream(File expectedFile, InputStream inputStream) throws IOException {
InputStream expectedInputStream = new FileInputStream(expectedFile);
return doesStreamEqualStream(expectedInputStream, inputStream);
}
}
