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/**
* Created Oct 19, 2009
*/
package org.junit.tests.experimental.rules;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertTrue;
import org.junit.ClassRule;
import org.junit.Test;
import org.junit.rules.TestRule;
import org.junit.rules.ExternalResource;
import org.junit.runner.Description;
import org.junit.runner.JUnitCore;
import org.junit.runner.Result;
import org.junit.runners.model.Statement;
/**
* Tests to exercise class-level rules.
*/
public class ClassRulesTest {
public static class Counter extends ExternalResource {
public int count = 0;
@Override
protected void before() throws Throwable {
count++;
}
}
public static class ExampleTestWithClassRule {
@ClassRule
public static Counter counter= new Counter();
@Test
public void firstTest() {
assertEquals(1, counter.count);
}
@Test
public void secondTest() {
assertEquals(1, counter.count);
}
}
@Test
public void ruleIsAppliedOnce() {
ExampleTestWithClassRule.counter.count= 0;
JUnitCore.runClasses(ExampleTestWithClassRule.class);
assertEquals(1, ExampleTestWithClassRule.counter.count);
}
public static class SubclassOfTestWithClassRule extends
ExampleTestWithClassRule {
}
@Test
public void ruleIsIntroducedAndEvaluatedOnSubclass() {
ExampleTestWithClassRule.counter.count= 0;
JUnitCore.runClasses(SubclassOfTestWithClassRule.class);
assertEquals(1, ExampleTestWithClassRule.counter.count);
}
public static class CustomCounter implements TestRule {
public int count = 0;
public Statement apply(final Statement base, Description description) {
return new Statement() {
@Override
public void evaluate() throws Throwable {
count++;
base.evaluate();
}
};
}
}
public static class ExampleTestWithCustomClassRule {
@ClassRule
public static CustomCounter counter= new CustomCounter();
@Test
public void firstTest() {
assertEquals(1, counter.count);
}
@Test
public void secondTest() {
assertEquals(1, counter.count);
}
}
@Test
public void customRuleIsAppliedOnce() {
ExampleTestWithCustomClassRule.counter.count= 0;
Result result= JUnitCore.runClasses(ExampleTestWithCustomClassRule.class);
assertTrue(result.wasSuccessful());
assertEquals(1, ExampleTestWithCustomClassRule.counter.count);
}
}
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