I am not getting how to write assertDoesNotThrow() using AssertJ library How to write assertDoesNotThrow() exception using AssertJ library? This is my question and anyone pls help me out in solving this .

CodePudding user response：

assertDoesNotThrow is not an AssertJ assertion but it belongs to JUnit's org.junit.jupiter.api.Assertions.

AssertJ provides other options, like:

• assertThatNoException().isThrownBy(...)
• assertThatCode(...).doesNotThrowAnyException()

More examples in the docs.

CodePudding user response：

JUnit's Assertions.assertDoesNotThrow expects an instance of the Executable interface.

Before Java 8, which introduced lambdas, this would be:

Assertions.assertDoesNotThrow(new Executable() {
  @Override
  public void execute() throws Throwable {
    // your code here which must not throw an exception
  }
});

Java 8 introduced lambdas which allow to make this code much more concise:

Assertions.assertDoesNotThrow(() -> {
  // your code here which must not throw an exception
});