/*
* Copyright 2003-2007 the original author or authors.
*
* 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 groovy.util;
import groovy.lang.Closure;
import groovy.lang.GroovyRuntimeException;
import groovy.lang.GroovyShell;
import junit.framework.TestCase;
import org.codehaus.groovy.runtime.InvokerHelper;
import org.codehaus.groovy.runtime.ScriptBytecodeAdapter;
import org.codehaus.groovy.runtime.typehandling.DefaultTypeTransformation;
import java.lang.reflect.Method;
import java.lang.reflect.Modifier;
import java.util.logging.Logger;
/**
* A default JUnit TestCase in Groovy. This provides a number of helper methods
* plus avoids the JUnit restriction of requiring all test* methods to be void
* return type.
*
* @author <a href="mailto:bob@werken.com">bob mcwhirter</a>
* @author <a href="mailto:james@coredevelopers.net">James Strachan</a>
* @author Dierk Koenig (the notYetImplemented feature, changes to shouldFail)
* @version $Revision$
*/
public class GroovyTestCase extends TestCase {
protected static Logger log = Logger.getLogger(GroovyTestCase.class.getName());
private static int counter;
private static final int MAX_NESTED_EXCEPTIONS = 10;
public static final String TEST_SCRIPT_NAME_PREFIX = "TestScript";
private boolean useAgileDoxNaming = false;
public GroovyTestCase() {
}
/**
* Overload the getName() method to make the test cases look more like AgileDox
* (thanks to Joe Walnes for this tip!)
*/
public String getName() {
if (useAgileDoxNaming) {
return super.getName().substring(4).replaceAll("([A-Z])", " $1").toLowerCase();
} else {
return super.getName();
}
}
public String getMethodName() {
return super.getName();
}
/**
* Asserts that the arrays are equivalent and contain the same values
*
* @param expected
* @param value
*/
protected void assertArrayEquals(Object[] expected, Object[] value) {
String message =
"expected array: " + InvokerHelper.toString(expected) + " value array: " + InvokerHelper.toString(value);
assertNotNull(message + ": expected should not be null", expected);
assertNotNull(message + ": value should not be null", value);
assertEquals(message, expected.length, value.length);
for (int i = 0, size = expected.length; i < size; i++) {
assertEquals("value[" + i + "] when " + message, expected[i], value[i]);
}
}
/**
* Asserts that the array of characters has a given length
*
* @param length expected length
* @param array the array
*/
protected void assertLength(int length, char[] array) {
assertEquals(length, array.length);
}
/**
* Asserts that the array of ints has a given length
*
* @param length expected length
* @param array the array
*/
protected void assertLength(int length, int[] array) {
assertEquals(length, array.length);
}
/**
* Asserts that the array of objects has a given length
*
* @param length expected length
* @param array the array
*/
protected void assertLength(int length, Object[] array) {
assertEquals(length, array.length);
}
/**
* Asserts that the array of characters contains a given char
*
* @param expected expected character to be found
* @param array the array
*/
protected void assertContains(char expected, char[] array) {
for (int i = 0; i < array.length; ++i) {
if (array[i] == expected) {
return;
}
}
StringBuffer message = new StringBuffer();
message.append(expected).append(" not in {");
for (int i = 0; i < array.length; ++i) {
message.append("'").append(array[i]).append("'");
if (i < (array.length - 1)) {
message.append(", ");
}
}
message.append(" }");
fail(message.toString());
}
/**
* Asserts that the array of ints contains a given int
*
* @param expected expected int
* @param array the array
*/
protected void assertContains(int expected, int[] array) {
for (int anInt : array) {
if (anInt == expected) {
return;
}
}
StringBuffer message = new StringBuffer();
message.append(expected).append(" not in {");
for (int i = 0; i < array.length; ++i) {
message.append("'").append(array[i]).append("'");
if (i < (array.length - 1)) {
message.append(", ");
}
}
message.append(" }");
fail(message.toString());
}
/**
* Asserts that the value of toString() on the given object matches the
* given text string
*
* @param value the object to be output to the console
* @param expected the expected String representation
*/
protected void assertToString(Object value, String expected) {
Object console = InvokerHelper.invokeMethod(value, "toString", null);
assertEquals("toString() on value: " + value, expected, console);
}
/**
* Asserts that the value of inspect() on the given object matches the
* given text string
*
* @param value the object to be output to the console
* @param expected the expected String representation
*/
protected void assertInspect(Object value, String expected) {
Object console = InvokerHelper.invokeMethod(value, "inspect", null);
assertEquals("inspect() on value: " + value, expected, console);
}
/**
* Asserts that the script runs without any exceptions
*
* @param script the script that should pass without any exception thrown
*/
protected void assertScript(final String script) throws Exception {
GroovyShell shell = new GroovyShell();
shell.evaluate(script, getTestClassName());
}
protected String getTestClassName() {
return TEST_SCRIPT_NAME_PREFIX + getMethodName() + (counter++) + ".groovy";
}
/**
* Asserts that the given code closure fails when it is evaluated
*
* @param code
* @return the message of the thrown Throwable
*/
protected String shouldFail(Closure code) {
boolean failed = false;
String result = null;
try {
code.call();
}
catch (GroovyRuntimeException gre) {
failed = true;
result = ScriptBytecodeAdapter.unwrap(gre).getMessage();
}
catch (Throwable e) {
failed = true;
result = e.getMessage();
}
assertTrue("Closure " + code + " should have failed", failed);
return result;
}
/**
* Asserts that the given code closure fails when it is evaluated
* and that a particular exception is thrown.
*
* @param clazz the class of the expected exception
* @param code the closure that should fail
* @return the message of the expected Throwable
*/
protected String shouldFail(Class clazz, Closure code) {
Throwable th = null;
try {
code.call();
} catch (GroovyRuntimeException gre) {
th = ScriptBytecodeAdapter.unwrap(gre);
} catch (Throwable e) {
th = e;
}
if (th == null) {
fail("Closure " + code + " should have failed with an exception of type " + clazz.getName());
} else if (!clazz.isInstance(th)) {
fail("Closure " + code + " should have failed with an exception of type " + clazz.getName() + ", instead got Exception " + th);
}
return th.getMessage();
}
/**
* Asserts that the given code closure fails when it is evaluated
* and that a particular exception can be attributed to the cause.
* The expected exception class is compared recursively with any nested
* exceptions using getCause() until either a match is found or no more
* nested exceptions exist.
* <p/>
* If a match is found the error message associated with the matching
* exception is returned. If no match was found the method will fail.
*
* @param clazz the class of the expected exception
* @param code the closure that should fail
* @return the message of the expected Throwable
*/
protected String shouldFailWithCause(Class clazz, Closure code) {
Throwable th = null;
Throwable orig = null;
int level = 0;
try {
code.call();
} catch (GroovyRuntimeException gre) {
orig = ScriptBytecodeAdapter.unwrap(gre);
th = orig.getCause();
} catch (Throwable e) {
orig = e;
th = orig.getCause();
}
while (th != null && !clazz.isInstance(th) && th != th.getCause() && level < MAX_NESTED_EXCEPTIONS) {
th = th.getCause();
level++;
}
if (orig == null) {
fail("Closure " + code + " should have failed with an exception caused by type " + clazz.getName());
} else if (th == null || !clazz.isInstance(th)) {
fail("Closure " + code + " should have failed with an exception caused by type " + clazz.getName() + ", instead found these Exceptions:\n" + buildExceptionList(orig));
}
return th.getMessage();
}
private String buildExceptionList(Throwable th) {
StringBuilder sb = new StringBuilder();
int level = 0;
while (th != null) {
if (level > 1) {
for (int i = 0; i < level - 1; i++) sb.append(" ");
}
if (level > 0) sb.append("-> ");
if (level > MAX_NESTED_EXCEPTIONS) {
sb.append("...");
break;
}
sb.append(th.getClass().getName()).append(": ").append(th.getMessage()).append("\n");
if (th == th.getCause()) {
break;
}
th = th.getCause();
level++;
}
return sb.toString();
}
/**
* Returns a copy of a string in which all EOLs are \n.
*/
protected String fixEOLs(String value) {
return value.replaceAll("(\\r\\n?)|\n", "\n");
}
/**
* Runs the calling JUnit test again and fails only if it unexpectedly runs.<br/>
* This is helpful for tests that don't currently work but should work one day,
* when the tested functionality has been implemented.<br/>
* The right way to use it is:
* <pre>
* public void testXXX() {
* if (GroovyTestCase.notYetImplemented(this)) return;
* ... the real (now failing) unit test
* }
* </pre>
* Idea copied from HtmlUnit (many thanks to Marc Guillemot).
* Future versions maybe available in the JUnit distro.
* The purpose of providing a 'static' version is such that you can use the
* feature even if not subclassing GroovyTestCase.
*
* @return <false> when not itself already in the call stack
*/
public static boolean notYetImplemented(TestCase caller) {
if (notYetImplementedFlag.get() != null) {
return false;
}
notYetImplementedFlag.set(Boolean.TRUE);
final Method testMethod = findRunningJUnitTestMethod(caller.getClass());
try {
log.info("Running " + testMethod.getName() + " as not yet implemented");
testMethod.invoke(caller, (Object[]) new Class[]{});
fail(testMethod.getName() + " is marked as not yet implemented but passes unexpectedly");
}
catch (final Exception e) {
log.info(testMethod.getName() + " fails which is expected as it is not yet implemented");
// method execution failed, it is really "not yet implemented"
}
finally {
notYetImplementedFlag.set(null);
}
return true;
}
/**
* Convenience method for subclasses of GroovyTestCase, identical to
* <pre> GroovyTestCase.notYetImplemented(this); </pre>.
*
* @return <false> when not itself already in the call stack
* @see #notYetImplemented(junit.framework.TestCase)
*/
public boolean notYetImplemented() {
return notYetImplemented(this);
}
/**
* From JUnit. Finds from the call stack the active running JUnit test case
*
* @return the test case method
* @throws RuntimeException if no method could be found.
*/
private static Method findRunningJUnitTestMethod(Class caller) {
final Class[] args = new Class[]{};
// search the initial junit test
final Throwable t = new Exception();
for (int i = t.getStackTrace().length - 1; i >= 0; --i) {
final StackTraceElement element = t.getStackTrace()[i];
if (element.getClassName().equals(caller.getName())) {
try {
final Method m = caller.getMethod(element.getMethodName(), args);
if (isPublicTestMethod(m)) {
return m;
}
}
catch (final Exception e) {
// can't access, ignore it
}
}
}
throw new RuntimeException("No JUnit test case method found in call stack");
}
/**
* From Junit. Test if the method is a junit test.
*
* @param method the method
* @return <code>true</code> if this is a junit test.
*/
private static boolean isPublicTestMethod(final Method method) {
final String name = method.getName();
final Class[] parameters = method.getParameterTypes();
final Class returnType = method.getReturnType();
return parameters.length == 0 && name.startsWith("test")
&& returnType.equals(Void.TYPE)
&& Modifier.isPublic(method.getModifiers());
}
public static void assertEquals(String message, Object expected, Object actual) {
if (expected == null && actual == null)
return;
if (expected != null && DefaultTypeTransformation.compareEqual(expected, actual))
return;
failNotEquals(message, expected, actual);
}
public static void assertEquals(Object expected, Object actual) {
assertEquals(null, expected, actual);
}
public static void assertEquals(String expected, String actual) {
assertEquals(null, expected, actual);
}
private static final ThreadLocal notYetImplementedFlag = new ThreadLocal();
}