JUnit5 & Mockito

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Welcome!

This playground lets you get started quickly with a simple working example using Maven and JUnit5.

Hands-on Exercise

Write an assertion to compare two String are equal.
Write an assertion to check null.
Write an assertion to check equality of two byte array.

Assertions in JUnit5

// {
class AssertionsInJUnitFiveTest {
    
    @Test
    public void test() throws FileNotFoundException {
        try {
            success(true);
        } catch (AssertionError ae) {
            // {
            success(false);
            msg("Oops! 🐞", ae.getMessage());
            //}
        }
    }
    // {
    private static void success(boolean success) {
        if(success)
        msg("👍" ," Awesome");
        System.out.println(String.format("TECHIO> success %s", success));
    }
    private static void msg(String channel, String msg) {
        System.out.println(String.format("TECHIO> message --channel \"%s\" \"%s\"", channel, msg));
    }
    //}
 
}
 

HamCrest API Matchers

Write a HamCrest Matcher to check Map has key “John”
Write a HamCrest Matcher to check Map has entry “John , J”

Using HamCrest in JUnit5

Mockito in JUnit 5

Write Mockito Based test case for Messenger class

Mockito in JUnit5

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