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/*
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* Copyright (c) 2013, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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package org.graalvm.compiler.test;
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import java.io.PrintStream;
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import java.io.PrintWriter;
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import java.lang.reflect.Field;
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import java.lang.reflect.Method;
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import java.util.Arrays;
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import org.junit.Assert;
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import org.junit.internal.ComparisonCriteria;
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import org.junit.internal.ExactComparisonCriteria;
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import sun.misc.Unsafe;
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/**
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* Base class that contains common utility methods and classes useful in unit tests.
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*/
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public class GraalTest {
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public static final Unsafe UNSAFE;
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static {
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try {
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Field theUnsafe = Unsafe.class.getDeclaredField("theUnsafe");
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theUnsafe.setAccessible(true);
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UNSAFE = (Unsafe) theUnsafe.get(Unsafe.class);
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} catch (Exception e) {
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throw new RuntimeException("exception while trying to get Unsafe", e);
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}
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}
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public static final boolean Java8OrEarlier = System.getProperty("java.specification.version").compareTo("1.9") < 0;
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protected Method getMethod(String methodName) {
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return getMethod(getClass(), methodName);
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}
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protected Method getMethod(Class<?> clazz, String methodName) {
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Method found = null;
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for (Method m : clazz.getMethods()) {
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if (m.getName().equals(methodName)) {
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Assert.assertNull(found);
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found = m;
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}
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}
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if (found == null) {
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/* Now look for non-public methods (but this does not look in superclasses). */
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for (Method m : clazz.getDeclaredMethods()) {
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if (m.getName().equals(methodName)) {
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Assert.assertNull(found);
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found = m;
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}
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}
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}
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if (found != null) {
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return found;
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} else {
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throw new RuntimeException("method not found: " + methodName);
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}
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}
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protected Method getMethod(Class<?> clazz, String methodName, Class<?>[] parameterTypes) {
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try {
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return clazz.getMethod(methodName, parameterTypes);
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} catch (NoSuchMethodException | SecurityException e) {
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throw new RuntimeException("method not found: " + methodName + "" + Arrays.toString(parameterTypes));
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}
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}
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/**
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* Compares two given objects for {@linkplain Assert#assertEquals(Object, Object) equality}.
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* Does a deep copy equality comparison if {@code expected} is an array.
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*/
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protected void assertDeepEquals(Object expected, Object actual) {
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assertDeepEquals(null, expected, actual);
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}
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/**
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* Compares two given objects for {@linkplain Assert#assertEquals(Object, Object) equality}.
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* Does a deep copy equality comparison if {@code expected} is an array.
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*
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* @param message the identifying message for the {@link AssertionError}
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*/
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protected void assertDeepEquals(String message, Object expected, Object actual) {
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if (ulpsDelta() > 0) {
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assertDeepEquals(message, expected, actual, ulpsDelta());
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} else {
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assertDeepEquals(message, expected, actual, equalFloatsOrDoublesDelta());
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}
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}
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/**
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* Compares two given values for equality, doing a recursive test if both values are arrays of
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* the same type.
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*
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* @param message the identifying message for the {@link AssertionError}
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* @param delta the maximum delta between two doubles or floats for which both numbers are still
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* considered equal.
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*/
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protected void assertDeepEquals(String message, Object expected, Object actual, double delta) {
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if (expected != null && actual != null) {
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Class<?> expectedClass = expected.getClass();
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Class<?> actualClass = actual.getClass();
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if (expectedClass.isArray()) {
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Assert.assertTrue(message, expected != null);
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Assert.assertTrue(message, actual != null);
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Assert.assertEquals(message, expectedClass, actual.getClass());
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if (expected instanceof int[]) {
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Assert.assertArrayEquals(message, (int[]) expected, (int[]) actual);
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} else if (expected instanceof byte[]) {
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Assert.assertArrayEquals(message, (byte[]) expected, (byte[]) actual);
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} else if (expected instanceof char[]) {
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Assert.assertArrayEquals(message, (char[]) expected, (char[]) actual);
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} else if (expected instanceof short[]) {
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Assert.assertArrayEquals(message, (short[]) expected, (short[]) actual);
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} else if (expected instanceof float[]) {
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Assert.assertArrayEquals(message, (float[]) expected, (float[]) actual, (float) delta);
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} else if (expected instanceof long[]) {
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Assert.assertArrayEquals(message, (long[]) expected, (long[]) actual);
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} else if (expected instanceof double[]) {
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Assert.assertArrayEquals(message, (double[]) expected, (double[]) actual, delta);
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} else if (expected instanceof boolean[]) {
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new ExactComparisonCriteria().arrayEquals(message, expected, actual);
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} else if (expected instanceof Object[]) {
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new ComparisonCriteria() {
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@Override
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protected void assertElementsEqual(Object e, Object a) {
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assertDeepEquals(message, e, a, delta);
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}
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}.arrayEquals(message, expected, actual);
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} else {
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Assert.fail((message == null ? "" : message) + "non-array value encountered: " + expected);
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}
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} else if (expectedClass.equals(double.class) && actualClass.equals(double.class)) {
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Assert.assertEquals((double) expected, (double) actual, delta);
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} else if (expectedClass.equals(float.class) && actualClass.equals(float.class)) {
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Assert.assertEquals((float) expected, (float) actual, delta);
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} else {
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Assert.assertEquals(message, expected, actual);
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}
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} else {
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Assert.assertEquals(message, expected, actual);
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}
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}
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/**
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* Compares two given values for equality, doing a recursive test if both values are arrays of
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* the same type. Uses {@linkplain StrictMath#ulp(float) ULP}s for comparison of floats.
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*
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* @param message the identifying message for the {@link AssertionError}
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* @param ulpsDelta the maximum allowed ulps difference between two doubles or floats for which
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* both numbers are still considered equal.
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*/
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protected void assertDeepEquals(String message, Object expected, Object actual, int ulpsDelta) {
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ComparisonCriteria doubleUlpsDeltaCriteria = new ComparisonCriteria() {
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@Override
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protected void assertElementsEqual(Object e, Object a) {
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assertTrue(message, e instanceof Double && a instanceof Double);
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// determine acceptable error based on whether it is a normal number or a NaN/Inf
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double de = (Double) e;
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double epsilon = (!Double.isNaN(de) && Double.isFinite(de) ? ulpsDelta * Math.ulp(de) : 0);
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Assert.assertEquals(message, (Double) e, (Double) a, epsilon);
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}
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};
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ComparisonCriteria floatUlpsDeltaCriteria = new ComparisonCriteria() {
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@Override
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protected void assertElementsEqual(Object e, Object a) {
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assertTrue(message, e instanceof Float && a instanceof Float);
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// determine acceptable error based on whether it is a normal number or a NaN/Inf
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float fe = (Float) e;
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float epsilon = (!Float.isNaN(fe) && Float.isFinite(fe) ? ulpsDelta * Math.ulp(fe) : 0);
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Assert.assertEquals(message, (Float) e, (Float) a, epsilon);
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}
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};
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if (expected != null && actual != null) {
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Class<?> expectedClass = expected.getClass();
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Class<?> actualClass = actual.getClass();
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if (expectedClass.isArray()) {
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Assert.assertEquals(message, expectedClass, actualClass);
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if (expected instanceof double[] || expected instanceof Object[]) {
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doubleUlpsDeltaCriteria.arrayEquals(message, expected, actual);
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return;
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} else if (expected instanceof float[] || expected instanceof Object[]) {
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floatUlpsDeltaCriteria.arrayEquals(message, expected, actual);
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return;
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}
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} else if (expectedClass.equals(double.class) && actualClass.equals(double.class)) {
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doubleUlpsDeltaCriteria.arrayEquals(message, expected, actual);
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return;
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} else if (expectedClass.equals(float.class) && actualClass.equals(float.class)) {
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floatUlpsDeltaCriteria.arrayEquals(message, expected, actual);
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return;
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}
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}
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// anything else just use the non-ulps version
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assertDeepEquals(message, expected, actual, equalFloatsOrDoublesDelta());
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}
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/**
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* Gets the value used by {@link #assertDeepEquals(Object, Object)} and
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* {@link #assertDeepEquals(String, Object, Object)} for the maximum delta between two doubles
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* or floats for which both numbers are still considered equal.
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*/
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protected double equalFloatsOrDoublesDelta() {
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return 0.0D;
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}
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// unless overridden ulpsDelta is not used
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protected int ulpsDelta() {
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return 0;
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}
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@SuppressWarnings("serial")
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public static class MultiCauseAssertionError extends AssertionError {
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private Throwable[] causes;
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public MultiCauseAssertionError(String message, Throwable... causes) {
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super(message);
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this.causes = causes;
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}
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@Override
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public void printStackTrace(PrintStream out) {
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super.printStackTrace(out);
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int num = 0;
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for (Throwable cause : causes) {
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if (cause != null) {
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out.print("cause " + (num++));
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cause.printStackTrace(out);
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}
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}
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}
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@Override
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public void printStackTrace(PrintWriter out) {
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super.printStackTrace(out);
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int num = 0;
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for (Throwable cause : causes) {
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if (cause != null) {
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out.print("cause " + (num++) + ": ");
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cause.printStackTrace(out);
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}
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}
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}
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}
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/*
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* Overrides to the normal JUnit {@link Assert} routines that provide varargs style formatting
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* and produce an exception stack trace with the assertion frames trimmed out.
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*/
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/**
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* Fails a test with the given message.
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*
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* @param message the identifying message for the {@link AssertionError} (<code>null</code>
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* okay)
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* @see AssertionError
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*/
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public static void fail(String message, Object... objects) {
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AssertionError e;
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if (message == null) {
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e = new AssertionError();
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} else {
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e = new AssertionError(String.format(message, objects));
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}
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// Trim the assert frames from the stack trace
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StackTraceElement[] trace = e.getStackTrace();
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int start = 1; // Skip this frame
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String thisClassName = GraalTest.class.getName();
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while (start < trace.length && trace[start].getClassName().equals(thisClassName) && (trace[start].getMethodName().equals("assertTrue") || trace[start].getMethodName().equals("assertFalse"))) {
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start++;
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}
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e.setStackTrace(Arrays.copyOfRange(trace, start, trace.length));
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throw e;
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}
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/**
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* Asserts that a condition is true. If it isn't it throws an {@link AssertionError} with the
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* given message.
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*
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* @param message the identifying message for the {@link AssertionError} (<code>null</code>
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* okay)
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* @param condition condition to be checked
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*/
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public static void assertTrue(String message, boolean condition) {
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assertTrue(condition, message);
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}
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/**
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* Asserts that a condition is true. If it isn't it throws an {@link AssertionError} without a
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* message.
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*
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* @param condition condition to be checked
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*/
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public static void assertTrue(boolean condition) {
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assertTrue(condition, null);
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}
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/**
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* Asserts that a condition is false. If it isn't it throws an {@link AssertionError} with the
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* given message.
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*
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* @param message the identifying message for the {@link AssertionError} (<code>null</code>
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* okay)
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* @param condition condition to be checked
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*/
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public static void assertFalse(String message, boolean condition) {
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assertTrue(!condition, message);
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}
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/**
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* Asserts that a condition is false. If it isn't it throws an {@link AssertionError} without a
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* message.
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*
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* @param condition condition to be checked
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*/
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public static void assertFalse(boolean condition) {
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assertTrue(!condition, null);
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}
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/**
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* Asserts that a condition is true. If it isn't it throws an {@link AssertionError} with the
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* given message.
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*
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* @param condition condition to be checked
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* @param message the identifying message for the {@link AssertionError}
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* @param objects arguments to the format string
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*/
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public static void assertTrue(boolean condition, String message, Object... objects) {
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if (!condition) {
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fail(message, objects);
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}
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}
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/**
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* Asserts that a condition is false. If it isn't it throws an {@link AssertionError} with the
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* given message produced by {@link String#format}.
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*
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* @param condition condition to be checked
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* @param message the identifying message for the {@link AssertionError}
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* @param objects arguments to the format string
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*/
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public static void assertFalse(boolean condition, String message, Object... objects) {
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assertTrue(!condition, message, objects);
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}
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}
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