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// onjava/atunit/AtUnit.java
// (c)2016 MindView LLC: see Copyright.txt
// We make no guarantees that this code is fit for any purpose.
// Visit http://mindviewinc.com/Books/OnJava/ for more book information.
// An annotation-based unit-test framework
// {java onjava.atunit.AtUnit}
package onjava.atunit;
import java.lang.reflect.*;
import java.io.*;
import java.util.*;
import java.nio.file.*;
import java.util.stream.*;
import onjava.*;
public class AtUnit implements ProcessFiles.Strategy {
static Class<?> testClass;
static List<String> failedTests= new ArrayList<>();
static long testsRun = 0;
static long failures = 0;
public static void
main(String[] args) throws Exception {
ClassLoader.getSystemClassLoader()
.setDefaultAssertionStatus(true); // Enable asserts
new ProcessFiles(new AtUnit(), "class").start(args);
if(failures == 0)
System.out.println("OK (" + testsRun + " tests)");
else {
System.out.println("(" + testsRun + " tests)");
System.out.println(
"\n>>> " + failures + " FAILURE" +
(failures > 1 ? "S" : "") + " <<<");
for(String failed : failedTests)
System.out.println(" " + failed);
}
}
@Override
public void process(File cFile) {
try {
String cName = ClassNameFinder.thisClass(
Files.readAllBytes(cFile.toPath()));
if(!cName.startsWith("public:"))
return;
cName = cName.split(":")[1];
if(!cName.contains("."))
return; // Ignore unpackaged classes
testClass = Class.forName(cName);
} catch(IOException | ClassNotFoundException e) {
throw new RuntimeException(e);
}
TestMethods testMethods = new TestMethods();
Method creator = null;
Method cleanup = null;
for(Method m : testClass.getDeclaredMethods()) {
testMethods.addIfTestMethod(m);
if(creator == null)
creator = checkForCreatorMethod(m);
if(cleanup == null)
cleanup = checkForCleanupMethod(m);
}
if(testMethods.size() > 0) {
if(creator == null)
try {
if(!Modifier.isPublic(testClass
.getDeclaredConstructor().getModifiers())) {
System.out.println("Error: " + testClass +
" no-arg constructor must be public");
System.exit(1);
}
} catch(NoSuchMethodException e) {
// Synthesized no-arg constructor; OK
}
System.out.println(testClass.getName());
}
for(Method m : testMethods) {
System.out.print(" . " + m.getName() + " ");
try {
Object testObject = createTestObject(creator);
boolean success = false;
try {
if(m.getReturnType().equals(boolean.class))
success = (Boolean)m.invoke(testObject);
else {
m.invoke(testObject);
success = true; // If no assert fails
}
} catch(InvocationTargetException e) {
// Actual exception is inside e:
System.out.println(e.getCause());
}
System.out.println(success ? "" : "(failed)");
testsRun++;
if(!success) {
failures++;
failedTests.add(testClass.getName() +
": " + m.getName());
}
if(cleanup != null)
cleanup.invoke(testObject, testObject);
} catch(IllegalAccessException |
IllegalArgumentException |
InvocationTargetException e) {
throw new RuntimeException(e);
}
}
}
public static
class TestMethods extends ArrayList<Method> {
void addIfTestMethod(Method m) {
if(m.getAnnotation(Test.class) == null)
return;
if(!(m.getReturnType().equals(boolean.class) ||
m.getReturnType().equals(void.class)))
throw new RuntimeException("@Test method" +
" must return boolean or void");
m.setAccessible(true); // In case it's private, etc.
add(m);
}
}
private static Method checkForCreatorMethod(Method m) {
if(m.getAnnotation(TestObjectCreate.class) == null)
return null;
if(!m.getReturnType().equals(testClass))
throw new RuntimeException("@TestObjectCreate " +
"must return instance of Class to be tested");
if((m.getModifiers() &
java.lang.reflect.Modifier.STATIC) < 1)
throw new RuntimeException("@TestObjectCreate " +
"must be static.");
m.setAccessible(true);
return m;
}
private static Method checkForCleanupMethod(Method m) {
if(m.getAnnotation(TestObjectCleanup.class) == null)
return null;
if(!m.getReturnType().equals(void.class))
throw new RuntimeException("@TestObjectCleanup " +
"must return void");
if((m.getModifiers() &
java.lang.reflect.Modifier.STATIC) < 1)
throw new RuntimeException("@TestObjectCleanup " +
"must be static.");
if(m.getParameterTypes().length == 0 ||
m.getParameterTypes()[0] != testClass)
throw new RuntimeException("@TestObjectCleanup " +
"must take an argument of the tested type.");
m.setAccessible(true);
return m;
}
private static Object createTestObject(Method creator) {
if(creator != null) {
try {
return creator.invoke(testClass);
} catch(IllegalAccessException |
IllegalArgumentException |
InvocationTargetException e) {
throw new RuntimeException("Couldn't run " +
"@TestObject (creator) method.");
}
} else { // Use the no-arg constructor:
try {
return testClass.newInstance();
} catch(InstantiationException |
IllegalAccessException e) {
throw new RuntimeException("Couldn't create a " +
"test object. Try using a @TestObject method.");
}
}
}
}