ScalaTest 1.0
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trait
MustMatchersForJUnit
extends
MustMatchers with
AssertionsForJUnitMustMatchers
DSL syntax available for use with JUnit.
The assertion methods provided in this trait look and behave exactly like the ones in
MustMatchers
, except instead of throwing
TestFailedException
they throw
JUnitTestFailedError
,
which extends junit.framework.AssertionFailedError
.
JUnit 3 (release 3.8 and earlier) distinguishes between failures and errors.
If a test fails because of a failed assertion, that is considered a failure. If a test
fails for any other reason, either the test code or the application being tested threw an unexpected
exception, that is considered an error. The way JUnit 3 decides whether an exception represents
a failure or error is that only thrown junit.framework.AssertionFailedError
s are considered
failures. Any other exception type is considered an error. The exception type thrown by the JUnit 3
assertion methods declared in junit.framework.Assert
(such as assertEquals
,
assertTrue
, and fail
) is, therefore, AssertionFailedError
.
In JUnit 4, AssertionFailedError
was made to extend java.lang.AssertionError
,
and the distinction between failures and errors was essentially dropped. However, some tools that integrate
with JUnit carry on this distinction, so even if you are using JUnit 4 you may want to use this
MustMatchersForJUnit
trait instead of plain-old ScalaTest
MustMatchers
.
To use this trait in a JUnit 3 TestCase
, you can mix it into your TestCase
class, like this:
import junit.framework.TestCase import org.scalatest.junit.MustMatchersForJUnit class MyTestCase extends TestCase with MustMatchersForJUnit { def testSomething() { "hello, world!" must startWith ("hello") } // ... }
You can alternatively import the methods defined in this trait.
import junit.framework.TestCase import org.scalatest.junit.MustMatchersForJUnit._ class MyTestCase extends TestCase { def testSomething() { "hello, world!" must startWith ("hello") } // ... }
For details on the importing approach, see the documentation
for the MustMatchersForJUnit
companion object.
For the details on the MustMatchersForJUnit
syntax, see the Scaladoc documentation for
org.scalatest.matchers.MustMatchers
Values and Variables inherited from Matchers | |
not, be, have, contain, include, fullyMatch, startWith, endWith, length, size, key, value, a, an, theSameInstanceAs, regex |
Methods inherited from Assertions | |
assert, assert, assert, assert, convertToEqualizer, intercept, expect, expect, fail, fail, fail, fail |
Methods inherited from AnyRef | |
getClass, hashCode, equals, clone, toString, notify, notifyAll, wait, wait, wait, finalize, ==, !=, eq, ne, synchronized |
Methods inherited from Any | |
==, !=, isInstanceOf, asInstanceOf |
ScalaTest 1.0
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