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java.lang.Objectorg.junit.rules.ExpectedException
public class ExpectedException
The ExpectedException Rule allows in-test specification of expected exception types and messages:
// These tests all pass.
public static class HasExpectedException {
@Rule
public ExpectedException thrown= ExpectedException.none();
@Test
public void throwsNothing() {
// no exception expected, none thrown: passes.
}
@Test
public void throwsNullPointerException() {
thrown.expect(NullPointerException.class);
throw new NullPointerException();
}
@Test
public void throwsNullPointerExceptionWithMessage() {
thrown.expect(NullPointerException.class);
thrown.expectMessage("happened?");
thrown.expectMessage(startsWith("What"));
throw new NullPointerException("What happened?");
}
}
| Method Summary | |
|---|---|
Statement |
apply(Statement base,
Description description)
Modifies the method-running Statement to implement this
test-running rule. |
void |
expect(Class<? extends Throwable> type)
Adds to the list of requirements for any thrown exception that it should be an instance of type |
void |
expect(Matcher<?> matcher)
Adds matcher to the list of requirements for any thrown exception. |
void |
expectMessage(Matcher<String> matcher)
Adds matcher to the list of requirements for the message
returned from any thrown exception. |
void |
expectMessage(String substring)
Adds to the list of requirements for any thrown exception that it should contain string substring |
static ExpectedException |
none()
|
| Methods inherited from class java.lang.Object |
|---|
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
| Method Detail |
|---|
public static ExpectedException none()
public Statement apply(Statement base,
Description description)
TestRuleStatement to implement this
test-running rule.
apply in interface TestRulebase - The Statement to be modifieddescription - A Description of the test implemented in base
base,
a wrapper around base, or a completely new Statement.public void expect(Matcher<?> matcher)
matcher to the list of requirements for any thrown exception.
public void expect(Class<? extends Throwable> type)
type
public void expectMessage(String substring)
substring
public void expectMessage(Matcher<String> matcher)
matcher to the list of requirements for the message
returned from any thrown exception.
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