Java Reference
In-Depth Information
When you use JUnit, you design a companion test class for each class that you
develop. Two versions of JUnit are currently in common use, 3 and 4. We describe
both versions. In JUnit 3, your test class has two essential properties:
ȗ
The test class must extend the class
TestCase
from the
junit.framework
package.
ȗ
For each test case, you must define a method whose name starts with
test
,
such as
testSimpleCase
.
Figure 6
Unit Testing with JUnit
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In each test case, you make some computations and then compute some condition that
you believe to be true. You then pass the result to a method that communicates a test
result to the framework, most commonly the
assertEquals
method. The
assertEquals
method takes as parameters the expected and actual values and, for
floating-point numbers, a tolerance value.
