/*
 * 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.platform.testkit.engine;

import static org.assertj.core.api.Assertions.assertThat;
import static org.assertj.core.api.Assertions.assertThatExceptionOfType;
import static org.junit.jupiter.api.Assertions.assertDoesNotThrow;
import static org.junit.platform.engine.discovery.DiscoverySelectors.selectClass;
import static org.junit.platform.testkit.engine.EventConditions.container;
import static org.junit.platform.testkit.engine.EventConditions.displayName;
import static org.junit.platform.testkit.engine.EventConditions.engine;
import static org.junit.platform.testkit.engine.EventConditions.event;
import static org.junit.platform.testkit.engine.EventConditions.finishedSuccessfully;
import static org.junit.platform.testkit.engine.EventConditions.nestedContainer;
import static org.junit.platform.testkit.engine.EventConditions.started;
import static org.junit.platform.testkit.engine.EventConditions.test;
import static org.mockito.Mockito.mock;
import static org.mockito.Mockito.when;

import java.util.HashMap;

import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.Nested;
import org.junit.jupiter.api.Test;
import org.junit.platform.commons.PreconditionViolationException;
import org.junit.platform.engine.TestDescriptor;
import org.junit.platform.engine.UniqueId;
import org.junit.platform.testkit.engine.NestedContainerEventConditionTests.ATestCase.BTestCase;
import org.junit.platform.testkit.engine.NestedContainerEventConditionTests.ATestCase.BTestCase.CTestCase;

/**
 * @since 1.6
 */
class NestedContainerEventConditionTests {

	@Test
	void preconditions() {
		assertThatExceptionOfType(PreconditionViolationException.class)//
				.isThrownBy(() -> nestedContainer(null))//
				.withMessage("Class must not be null");

		assertThatExceptionOfType(PreconditionViolationException.class)//
				.isThrownBy(() -> nestedContainer(NestedContainerEventConditionTests.class))//
				.withMessage(NestedContainerEventConditionTests.class.getName() + " must be a nested class");
	}

	@Test
	void nestedContainerChecksSuppliedClassAndAllEnclosingClasses() {
		var uniqueId = UniqueId.root("top-level", getClass().getName())//
				.append("nested", ATestCase.class.getSimpleName())//
				.append("nested", BTestCase.class.getSimpleName())//
				.append("nested", CTestCase.class.getSimpleName());
		var event = createEvent(uniqueId);

		var condition = nestedContainer(HashMap.Entry.class);
		assertThat(condition.matches(event)).isFalse();
		assertThat(condition.toString()).contains(//
			"is a container", "with uniqueId substring 'Map'", "with uniqueId substring 'Entry'");

		condition = nestedContainer(ATestCase.BTestCase.CTestCase.class);
		assertThat(condition.matches(event)).isTrue();
		assertThat(condition.toString()).contains(//
			"is a container", "with uniqueId substring 'NestedContainerEventConditionTests'",
			"with uniqueId substring 'ATestCase'", "with uniqueId substring 'BTestCase'",
			"with uniqueId substring 'CTestCase'");
	}

	private Event createEvent(UniqueId uniqueId) {
		var testDescriptor = mock(TestDescriptor.class);
		when(testDescriptor.isContainer()).thenReturn(true);
		when(testDescriptor.getUniqueId()).thenReturn(uniqueId);

		var event = mock(Event.class);
		when(event.getTestDescriptor()).thenReturn(testDescriptor);
		return event;
	}

	@Test
	void usingNestedContainerCorrectly() {
		assertDoesNotThrow(() -> container(ATestCase.class));
		assertDoesNotThrow(() -> nestedContainer(ATestCase.class));

		assertDoesNotThrow(() -> container(ATestCase.BTestCase.class));
		assertDoesNotThrow(() -> nestedContainer(ATestCase.BTestCase.class));

		assertDoesNotThrow(() -> container(ATestCase.BTestCase.CTestCase.class));
		assertDoesNotThrow(() -> nestedContainer(ATestCase.BTestCase.CTestCase.class));

		assertDoesNotThrow(() -> container(NestedContainerEventConditionTests.class));
	}

	@Test
	void eventConditionsForMultipleLevelsOfNestedClasses() {
		// @formatter:off
		EngineTestKit.engine("junit-jupiter")
			.selectors(selectClass(ATestCase.class))
			.execute()
			.allEvents()
			.assertEventsMatchExactly(
				event(engine(), started()),
					event(container(ATestCase.class), started()),
						event(test("test_a"), started()),
						event(test("test_a"), finishedSuccessfully()),
						event(nestedContainer(ATestCase.BTestCase.class, displayName("Test case B")), started()),
							event(test("test_b"), started()),
							event(test("test_b"), finishedSuccessfully()),
							event(nestedContainer(ATestCase.BTestCase.CTestCase.class), started()),
								event(test("test_c"), started()),
								event(test("test_c"), finishedSuccessfully()),
							event(nestedContainer(ATestCase.BTestCase.CTestCase.class), finishedSuccessfully()),
						event(nestedContainer(ATestCase.BTestCase.class, displayName("Test case B")), finishedSuccessfully()),
					event(container(ATestCase.class), finishedSuccessfully()),
				event(engine(), finishedSuccessfully())
			);
		// @formatter:on
	}

	static class ATestCase {

		@Test
		void test_a() {
		}

		@Nested
		@DisplayName("Test case B")
		class BTestCase {
			@Test
			void test_b() {
			}

			@Nested
			class CTestCase {
				@Test
				void test_c() {
				}
			}
		}
	}

}
