BDDMockito provides then() and should() methods to verify behavior.
Let's rewrite our old verifying behavior example.
Example
Example application
package com.logicbig.example;
public interface MyService {
public int doSomething(String processName);
}
package com.logicbig.example;
public class MyProcessor {
private String processName;
private MyService myService;
public MyProcessor(String processName, MyService myService) {
this.processName = processName;
this.myService = myService;
}
public void process() {
int returnInteger = processName != null ? myService.doSomething(processName) : -1;
System.out.println("My Integer is: " + returnInteger);
}
}
Using BDD style verification using then() and should()
package com.logicbig.example;
import org.junit.Test;
import org.mockito.BDDMockito;
import org.mockito.Mockito;
public class ProcessorTest {
@Test
public void processTest() {
MyService myService = Mockito.mock(MyService.class);
String processName = "dummy-process-name";
BDDMockito.given(myService.doSomething(processName)).willReturn(10);
MyProcessor myProcessor = new MyProcessor(processName, myService);
myProcessor.process();
BDDMockito.then(myService).should().doSomething(processName);
}
}
D:\mockito-bdd-style-behavior-verification>mvn test -Dtest="ProcessorTest" [INFO] Scanning for projects... [INFO] [INFO] ----< com.logicbig.example:mockito-bdd-style-behavior-verification >---- [INFO] Building mockito-bdd-style-behavior-verification 1.0-SNAPSHOT [INFO] --------------------------------[ jar ]--------------------------------- [INFO] [INFO] --- maven-resources-plugin:2.6:resources (default-resources) @ mockito-bdd-style-behavior-verification --- [WARNING] Using platform encoding (Cp1252 actually) to copy filtered resources, i.e. build is platform dependent! [INFO] [INFO] --- maven-compiler-plugin:3.8.1:compile (default-compile) @ mockito-bdd-style-behavior-verification --- [INFO] Changes detected - recompiling the module! [INFO] [INFO] --- maven-resources-plugin:2.6:testResources (default-testResources) @ mockito-bdd-style-behavior-verification --- [WARNING] Using platform encoding (Cp1252 actually) to copy filtered resources, i.e. build is platform dependent! [INFO] [INFO] --- maven-compiler-plugin:3.8.1:testCompile (default-testCompile) @ mockito-bdd-style-behavior-verification --- [INFO] Changes detected - recompiling the module! [INFO] [INFO] --- maven-surefire-plugin:2.12.4:test (default-test) @ mockito-bdd-style-behavior-verification ---
------------------------------------------------------- T E S T S ------------------------------------------------------- Running com.logicbig.example.ProcessorTest My Integer is: 10 Tests run: 1, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 0.431 sec
Results :
Tests run: 1, Failures: 0, Errors: 0, Skipped: 0
[INFO] ------------------------------------------------------------------------ [INFO] BUILD SUCCESS [INFO] ------------------------------------------------------------------------ [INFO] Total time: 2.356 s [INFO] Finished at: 2020-08-28T00:24:09-05:00 [INFO] ------------------------------------------------------------------------
Example ProjectDependencies and Technologies Used: - mockito-core 3.3.3: Mockito mock objects library core API and implementation.
- junit 4.13: JUnit is a unit testing framework for Java, created by Erich Gamma and Kent Beck.
- JDK 8
- Maven 3.5.4
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