In C#, it is possible to specify parameters for the same unit test method. Example:
[DataTestMethod]
[DataRow(12,3,4)]
[DataRow(12,2,6)]
public void DivideTest(int n, int d, int q)
{
Assert.AreEqual( q, n / d );
}
Is it possible to do the same in Java? I have read Parametrized runner but this solution is not as easy to use.
With JUnit 5, parameterized tests are really more straight and natural to use as with JUnit 4.
In your case, to provide multiple parameters as input, you could use the @CsvSource annotation.
Here are the required dependencies (maven declaration way) :
<dependency>
<groupId>org.junit.jupiter</groupId>
<artifactId>junit-jupiter-engine</artifactId>
<version>5.0.0-M4</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.junit.jupiter</groupId>
<artifactId>junit-jupiter-params</artifactId>
<version>5.0.0-M4</version>
<scope>test</scope>
</dependency>
And here is a sample code (with required imports) :
import org.junit.Assert;
import org.junit.jupiter.params.ParameterizedTest;
import org.junit.jupiter.params.provider.CsvSource;
public class YourTestClass{
@ParameterizedTest
@CsvSource({ "12,3,4", "12,2,6" })
public void divideTest(int n, int d, int q) {
Assert.assertEquals(q, n / d);
}
}
The Spock Framewok offers Data Driven Testing for Java and Groovy.
The Tests are (unfortunately?) written in Groovy:
class MathSpec extends Specification { def "maximum of two numbers"() { expect: Math.max(a, b) == c where: a | b || c 1 | 3 || 3 7 | 4 || 7 0 | 0 || 0 } }
You cannot achieve this so simple with JUnit out of the box, but you can use 3rd party JUnitParams:
@RunWith(JUnitParamsRunner.class)
public class PersonTest {
@Test
@Parameters({"17, false",
"22, true" })
public void personIsAdult(int age, boolean valid) throws Exception {
assertThat(new Person(age).isAdult(), is(valid));
}
@Test
public void lookNoParams() {
etc
}
}
yes, eg. JUnit has parameterized tests
https://github.com/junit-team/junit4/wiki/parameterized-tests
The only drawback is that all test methods in the class will be executed for each parameter (row).
