junit java api get test code example

Example 1: junit vs testng

-Annotations;
JUnit  --> @Test, @BeforeClass, @AfterClass, @Before, @After, @Ignore
TestNG --> @Test, @BeforeTest, @BeforeClass, @BeforeSuite, @BeforeMethod, 
		   @AfterTest, @AfterClass, @AfterSuite, @AfterMethod
           
-Both are testing framework to help us running automation scripts.
-TestNG provide HTML report.
-TestNG has @DataProvider annotation same as Cucumber Scenario Outline for DDT
-Both We can do parallel testing, but in different way. In TestNG we use XML
runner. In JUnit we use Maven Surefire Plugins.
-TestNG support group test but JUNit doesn't support.
-TestNG and JUnit both of them have parameterized testing but TestNG 
parameterizedd test configuration is very easy to configure. There are two ways
to achieve it in TestNG;
@Parameters and TestNG xml file
@DataProvider

Example 2: java unit test an api

@Test
public void
  givenUserExists_whenUserInformationIsRetrieved_thenRetrievedResourceIsCorrect()
  throws ClientProtocolException, IOException {
  
    // Given
    HttpUriRequest request = new HttpGet( "https://api.github.com/users/eugenp" );
 
    // When
    HttpResponse response = HttpClientBuilder.create().build().execute( request );
 
    // Then
    GitHubUser resource = RetrieveUtil.retrieveResourceFromResponse(
      response, GitHubUser.class);
    assertThat( "eugenp", Matchers.is( resource.getLogin() ) );
}

Example 3: java junit test

import org.junit.Assert;
import org.junit.Test;

public class Test {

    public static int square(int n) {
        return n * n;
    }

    @Test
    public void squareTest() {
        Assert.assertEquals(25, square(5));
        Assert.assertEquals(16, square(4));
        Assert.assertEquals(9, square(3));
        Assert.assertEquals(4, square(2));
        Assert.assertEquals(1, square(1));
    }
}