junit-jupiter-engine/src/test/java/org/junit/jupiter/api/AssertNotNullAssertionsTests.java

/*
 * Copyright 2015-2022 the original author or authors.
 *
 * All rights reserved. This program and the accompanying materials are
 * made available under the terms of the Eclipse Public License v2.0 which
 * accompanies this distribution and is available at
 *
 * https://www.eclipse.org/legal/epl-v20.html
 */

package org.junit.jupiter.api;

import static org.junit.jupiter.api.AssertionTestUtils.assertMessageEndsWith;
import static org.junit.jupiter.api.AssertionTestUtils.assertMessageEquals;
import static org.junit.jupiter.api.AssertionTestUtils.assertMessageStartsWith;
import static org.junit.jupiter.api.AssertionTestUtils.expectAssertionFailedError;
import static org.junit.jupiter.api.Assertions.assertNotNull;

import org.opentest4j.AssertionFailedError;

/**
 * Unit tests for JUnit Jupiter {@link Assertions}.
 *
 * @since 5.0
 */
class AssertNotNullAssertionsTests {

	@Test
	void assertNotNullWithNonNullObject() {
		assertNotNull("foo");
		assertNotNull("foo", "message");
		assertNotNull("foo", () -> "message");
	}

	@Test
	void assertNotNullWithNonNullObjectAndMessageSupplier() {
		assertNotNull("foo", () -> "should not fail");
	}

	@Test
	void assertNotNullWithNull() {
		try {
			assertNotNull(null);
			expectAssertionFailedError();
		}
		catch (AssertionFailedError ex) {
			assertMessageEquals(ex, "expected: not <null>");
		}
	}

	@Test
	void assertNotNullWithNullAndMessageSupplier() {
		try {
			assertNotNull(null, () -> "test");
			expectAssertionFailedError();
		}
		catch (AssertionFailedError ex) {
			assertMessageStartsWith(ex, "test");
			assertMessageEndsWith(ex, "expected: not <null>");
		}
	}

}