在JUnit中,是否有任何注释可以排除参数化测试类中的非参数测试?
在JUnit中,是否有任何注释可以排除参数化测试类中的非参数测试?
从JUnit 5.0.0开始,您现在可以使用@ParameterizedTest
注释测试方法,而无需使用内部类。除了像下面展示的ValueSource之外,还有许多方法可以向参数化测试提供参数。有关详细信息,请参见官方JUnit用户指南。
import org.junit.jupiter.api.Test;
import org.junit.jupiter.api.ParameterizedTest;
import org.junit.jupiter.params.provider.ValueSource;
public class ComponentTest {
@ParameterizedTest
@ValueSource(strings = { "racecar", "radar", "able was I ere I saw elba" })
public void testCaseUsingParams(String candidate) throws Exception {
}
@Test
public void testCaseWithoutParams() throws Exception {
}
}
如果您仍在使用 Junit 4(我已测试过 v4.8.2),您可以将 Enclosed 运行器与内部类和 Parameterized 运行器一起使用:
import org.junit.Test;
import org.junit.experimental.runners.Enclosed;
import org.junit.runner.RunWith;
import org.junit.runners.Parameterized;
@RunWith(Enclosed.class)
public class ComponentTest {
@RunWith(Parameterized.class)
public static class ComponentParamTests {
@Parameters
...
@Test
public void testCaseUsingParams() throws Exception {
}
}
public static class ComponentSingleTests {
@Test
public void testCaseWithoutParams() throws Exception {
}
}
}
nonParametrized
测试仅在Parametrized
测试之后运行。但我无法使其按照这种方式运行。我也尝试了FixMethodOrder
,但没有成功。 - balki我能够做类似于Matthew Madson的回答,发现创建一个基类来封装单个测试和参数化测试之间的设置和常见帮助函数非常有用。这可以在不使用Enclosed.class的情况下工作。
@RunWith(Suite.class)
@SuiteClasses({ComponentTest.ComponentParamTests.class, ComponentTest.ComponentSingleTests.class})
public class ComponentTest {
public static class TestBase {
@Spy
...
@Before
...
}
@RunWith(Parameterized.class)
public static class ComponentParamTests extends TestBase{
@Parameter
...
@Parameters
...
@Test
...
}
public static class ComponentSingleTests extends TestBase{
@Test
...
}
}
@RunWith(Suite.class)
和@SuiteClasses({ ComponentTest.ComponentParamTests.class, ComponentTest.ComponentParamTests.class })
注释外部类ComponentTest,使其可运行。然后它将运行嵌套类中的所有测试。来源:http://junit.sourceforge.net/javadoc/org/junit/runners/Suite.html - JCoster22看起来TestNG没有遇到这个问题。 我并不是那么绝望,所以我修改了内置的Parameterized类来支持这个特性。只需将适用的测试注释为@NonParameterized即可。 请注意,此类仅适用于其自己的注释,即检查您的导入。
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import java.lang.reflect.Modifier;
import java.util.ArrayList;
import java.util.Collections;
import java.util.Iterator;
import java.util.List;
import org.junit.Test;
import org.junit.runner.Runner;
import org.junit.runner.notification.RunNotifier;
import org.junit.runners.BlockJUnit4ClassRunner;
import org.junit.runners.Suite;
import org.junit.runners.model.FrameworkMethod;
import org.junit.runners.model.InitializationError;
import org.junit.runners.model.Statement;
import org.junit.runners.model.TestClass;
/**
* <p>
* The custom runner <code>Parameterized</code> implements parameterized tests.
* When running a parameterized test class, instances are created for the
* cross-product of the test methods and the test data elements.
* </p>
* For example, to test a Fibonacci function, write:
*
* <pre>
* @RunWith(Parameterized.class)
* public class FibonacciTest {
* @Parameters
* public static List<Object[]> data() {
* return Arrays.asList(new Object[][] {
* Fibonacci,
* { {0, 0}, {1, 1}, {2, 1}, {3, 2}, {4, 3}, {5, 5},
* {6, 8}}});
* }
*
* private int fInput;
*
* private int fExpected;
*
* public FibonacciTest(int input, int expected) {
* fInput = input;
* fExpected = expected;
* }
*
* @Test
* public void test() {
* assertEquals(fExpected, Fibonacci.compute(fInput));
* }
* }
* </pre>
* <p>
* Each instance of <code>FibonacciTest</code> will be constructed using the
* two-argument constructor and the data values in the
* <code>@Parameters</code> method.
* </p>
*/
public class Parameterized extends Suite {
/**
* Annotation for a method which provides parameters to be injected into the
* test class constructor by <code>Parameterized</code>
*/
@Retention(RetentionPolicy.RUNTIME)
@Target(ElementType.METHOD)
public static @interface Parameters {
}
/**
* Annotation for a methods which should not be parameterized
*/
@Retention(RetentionPolicy.RUNTIME)
@Target(ElementType.METHOD)
public static @interface NonParameterized {
}
private class TestClassRunnerForParameters extends
BlockJUnit4ClassRunner {
private final int fParameterSetNumber;
private final List<Object[]> fParameterList;
TestClassRunnerForParameters(Class<?> type,
List<Object[]> parameterList, int i) throws InitializationError {
super(type);
fParameterList = parameterList;
fParameterSetNumber = i;
}
@Override
public Object createTest() throws Exception {
return getTestClass().getOnlyConstructor().newInstance(
computeParams());
}
private Object[] computeParams() throws Exception {
try {
return fParameterList.get(fParameterSetNumber);
} catch (ClassCastException e) {
throw new Exception(String.format(
"%s.%s() must return a Collection of arrays.",
getTestClass().getName(), getParametersMethod(
getTestClass()).getName()));
}
}
@Override
protected String getName() {
return String.format("[%s]", fParameterSetNumber);
}
@Override
protected String testName(final FrameworkMethod method) {
return String.format("%s[%s]", method.getName(),
fParameterSetNumber);
}
@Override
protected void validateConstructor(List<Throwable> errors) {
validateOnlyOneConstructor(errors);
}
@Override
protected Statement classBlock(RunNotifier notifier) {
return childrenInvoker(notifier);
}
@Override
protected List<FrameworkMethod> computeTestMethods() {
List<FrameworkMethod> ret = super.computeTestMethods();
for (Iterator<FrameworkMethod> i = ret.iterator(); i.hasNext();) {
FrameworkMethod frameworkMethod =
(FrameworkMethod) i.next();
if (isParameterized() ^
!frameworkMethod.getMethod().isAnnotationPresent(
NonParameterized.class)) {
i.remove();
}
}
return ret;
}
protected boolean isParameterized() {
return true;
}
}
private class TestClassRunnerForNonParameterized extends
TestClassRunnerForParameters {
TestClassRunnerForNonParameterized(Class<?> type,
List<Object[]> parameterList, int i)
throws InitializationError {
super(type, parameterList, i);
}
protected boolean isParameterized() {
return false;
}
}
private final ArrayList<Runner> runners = new ArrayList<Runner>();
/**
* Only called reflectively. Do not use programmatically.
*/
public Parameterized(Class<?> klass) throws Throwable {
super(klass, Collections.<Runner> emptyList());
List<Object[]> parametersList = getParametersList(getTestClass());
if (parametersList.size() > 0) {
try {
runners.add(new TestClassRunnerForNonParameterized(
getTestClass()
.getJavaClass(), parametersList, 0));
} catch (Exception e) {
System.out.println("No non-parameterized tests.");
}
}
try {
for (int i = 0; i < parametersList.size(); i++) {
runners.add(new TestClassRunnerForParameters(getTestClass()
.getJavaClass(),
parametersList, i));
}
} catch (Exception e) {
System.out.println("No parameterized tests.");
}
}
@Override
protected List<Runner> getChildren() {
return runners;
}
@SuppressWarnings("unchecked")
private List<Object[]> getParametersList(TestClass klass)
throws Throwable {
return (List<Object[]>) getParametersMethod(klass).invokeExplosively(
null);
}
private FrameworkMethod getParametersMethod(TestClass testClass)
throws Exception {
List<FrameworkMethod> methods = testClass
.getAnnotatedMethods(Parameters.class);
for (FrameworkMethod each : methods) {
int modifiers = each.getMethod().getModifiers();
if (Modifier.isStatic(modifiers) && Modifier.isPublic(modifiers))
return each;
}
throw new Exception("No public static parameters method on class "
+ testClass.getName());
}
}
@ParameterizedTest
@MethodSource("provideStringsForIsBlank")
void isBlank_ShouldReturnTrueForNullOrBlankStrings(String input, boolean expected) {
assertEquals(expected, Strings.isBlank(input));
}
private static Stream<Arguments> provideStringsForIsBlank() {
return Stream.of(
Arguments.of(null, true),
Arguments.of("", true),
Arguments.of(" ", true),
Arguments.of("not blank", false)
);
}
(该文章)涉及编程相关内容,介绍了JUnit 5中的参数化测试,并提供了通俗易懂的解释。请注意,保留了HTML标签。ComponentTest.java
public class ComponentTest {
public int sharedMemberVariables;
...
}
ComponentParamTests.java
import org.junit.Test;
import org.junit.runner.RunWith;
import org.junit.runners.Parameterized;
@RunWith(Parameterized.class)
public class ComponentParamTests extends ComponentTest {
@Parameters
...
@Test
public void testCaseUsingParams() throws Exception {
}
}
ComponentSingleTests.java
import org.junit.Test;
public class ComponentSingleTests {
@Test
public void testCaseWithoutParams() throws Exception {
...
}
}
我在编写Spring Boot MockMvc测试时遇到了问题。我简单地创建了两个类,分别放在不同的Java文件中(一个用于ParameterizedTest,另一个用于SingleTest),并为它们创建了一个套件。因为内部类对于静态成员、非静态成员和类都会产生错误。