JUnit 中是否有任何注释来排除参数化测试类中的非参数测试？
问问题
21991 次
9 回答
74
JUnit 5
从 Junit 5.0.0 开始，您现在可以使用@ParameterizedTest. 所以不需要内部类。除了 ValueSource 之外，还有许多方法可以为参数化测试提供参数，如下所示。详见官方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 {
}
}
JUnit 4
如果您仍在使用 Junit 4（我使用 v4.8.2 进行了测试），您可以将封闭式运行器与内部类和参数化运行器结合使用：
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 {
}
}
}
于 2015-01-28T21:59:56.003 回答
6
不，最佳实践是将那些非参数化测试移动到不同的类（.java 文件）
于 2010-07-29T23:05:55.247 回答
3
Zohhak 测试运行器是一种参数化特定测试的更简单方法。谢谢彼得！
于 2016-12-20T06:14:28.167 回答
2
我能够做一些与 Matthew Madson 的回答非常相似的事情，并发现创建一个基类来封装单测试和参数测试之间的设置和常用帮助函数很有用。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
...
}
}
于 2017-10-24T16:56:03.807 回答
1
It appears that TestNG does not suffer from this problem. I'm not that desperate so I modified the builtin Parameterized class to support this feature. Just annotate applicable tests as @NonParameterized. Note that this class only works with its on annotations, i.e. check your imports.
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());
}
}
Update: I'm trying to get this sort of thing added to junit.
于 2011-06-10T23:40:55.310 回答
1
对于那些希望参数来自java 函数而不是注释的人：
@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)
);
}
于 2020-03-08T13:16:22.517 回答
0
假设您使用 Parametrized.class 来运行您的测试类 - 将所有非参数化测试标记为 @Ignored。否则，您可以创建一个静态内部类来对所有参数化测试和另一个 - 用于非参数化测试进行分组。
于 2012-04-27T16:37:54.573 回答
0
我做了类似于马修的解决方案的事情。但是，我创建了两个扩展当前文件的新 java 文件，这样 ComponentSingleTests 就不会运行两次。这样，它们可以共享来自父类的公共成员变量和辅助方法。我对 Matthew 的解决方案的问题是我的单个测试运行了两次而不是一次，因为 Enclosed.class（它扩展了 Suite.class）将使您的测试运行两次，如本链接中所述 防止 junit 测试运行两次
组件测试.java
public class ComponentTest {
public int sharedMemberVariables;
...
}
组件参数测试.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 {
}
}
组件单测试.java
import org.junit.Test;
public class ComponentSingleTests {
@Test
public void testCaseWithoutParams() throws Exception {
...
}
}
于 2016-03-29T18:26:10.327 回答
0
我在 Spring Boot MockMvc 中编写测试时遇到了这个问题，我只是在单独的 java 文件中创建了两个类（一个用于ParameterizedTest，另一个用于SingleTest）并为它们创建一个套件。因为内部类正在为静态成员而不是静态成员和类创建错误。
于 2019-08-28T04:20:13.320 回答