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JUnit 5 is a standard framework for unit testing in Java. Released in 2017, JUnit 5 is a major improvement over JUnit 4 and supports a lot of new methods. Many projects have migrated from JUnit 4 to JUnit 5. JUnit 5 is also the default test framework for new projects. JUnit 5 is composed of three sub-projects: JUnit Platform, JUnit Jupiter, and JUnit Vintage. Details of these sub-projects are discussed in the course.

This course first discusses the advantages of JUnit 5 over the previous versions and then jumps directly into tests. The course includes discussion on assertions, assumptions, tagging and filtering, nested tests, dependency injection, repeated tests, parameterized tests, dynamic tests, test instance lifecycle, extension model, JUnit 4 migration, JUnit platform, and test execution order. 

By the end of this course, you’ll be deeply familiar with unit testing in JUnit 5. There’s also a little project for you at the end to put your newly acquired skills to the test.

All About JUnit5

Given a parameterized test method that accepts a single `int` parameter, can the `longs` attribute of `@ValueSource` be used to provide the values?

Given a parameterized test method that accepts a single <code>int</code> parameter, can the <code>longs</code> attribute of <code>@ValueSource</code> be used to provide the values?

The `@MethodSource` method doesn’t exist.

How many arguments can the method using  `@MethodSource` have?





How many arguments can the method using <code>@MethodSource</code> have?

No, no method from an external class can be used.

Can any method from an external class be used as the source of arguments in a parameterized test?

Can any method from an external class be used as the source of arguments in a parameterized test?

For `@CsvFileSource`, what will happen if the CSV file can't be found?

For <code>@CsvFileSource</code>, what will happen if the CSV file can’t be found?

**(Fill in the blanks.)** We can create dynamic tests that are generated at ________ by ________:

(Fill in the blanks.) We can create dynamic tests that are generated at ________ by ________:

Will the following test pass or fail?
```
public class DynamicTest {
	@TestFactory
	Stream<DynamicNode> nestedTests() {
	return Stream.of(DynamicContainer.dynamicContainer("nested",Stream.of(
			DynamicTest.dynamicTest("test", () -> assertTrue(32>43)))));
}
```

Will the following test pass or fail?
<pre><code>public class DynamicTest {
	@TestFactory
	Stream&lt;DynamicNode&gt; nestedTests() {
	return Stream.of(DynamicContainer.dynamicContainer(&quot;nested&quot;,Stream.of(
			DynamicTest.dynamicTest(&quot;test&quot;, () -&gt; assertTrue(32&gt;43)))));
}
</code></pre>

Test what you’ve learned about parameterized and dynamic tests.

Getting Started

Writing Basic Tests

Annotations, Tagging, and Filtering

Nested tests in JUnit 5

Dependency Injections

Parameterized and Dynamic Tests

Test Instance Lifecycle in JUnit 5

Extension Model

JUnit Platform

Test Execution Order

Conclusion

Library Management System

Quiz on Parameterized and Dynamic Tests