Introduce dedicated tests for DisabledIfCondition

This commit introduces tests for DisabledIfCondition that verify actual
condition evaluation results and exception handling; whereas, the
existing tests in DisabledIfTestCase only test the "happy paths" and
standard cases.

Issue: SPR-14614

spring-test/src/test/java/org/springframework/test/context/junit/jupiter/DisabledIfConditionTestCase.java

+/*
+ * Copyright 2002-2016 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.springframework.test.context.junit.jupiter;
+
+import java.lang.reflect.Method;
+import java.util.Optional;
+
+import org.hamcrest.Matcher;
+
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.extension.ConditionEvaluationResult;
+import org.junit.jupiter.api.extension.ExtensionContext.Store;
+import org.junit.jupiter.api.extension.TestExtensionContext;
+
+import org.springframework.context.annotation.Configuration;
+import org.springframework.test.context.TestContextManager;
+import org.springframework.util.ReflectionUtils;
+
+import static org.hamcrest.CoreMatchers.containsString;
+import static org.hamcrest.CoreMatchers.endsWith;
+import static org.hamcrest.CoreMatchers.equalTo;
+import static org.hamcrest.CoreMatchers.is;
+import static org.hamcrest.CoreMatchers.startsWith;
+import static org.hamcrest.MatcherAssert.assertThat;
+import static org.junit.jupiter.api.Assertions.assertAll;
+import static org.junit.jupiter.api.Assertions.assertFalse;
+import static org.junit.jupiter.api.Assertions.assertNotNull;
+import static org.junit.jupiter.api.Assertions.assertTrue;
+import static org.junit.jupiter.api.Assertions.expectThrows;
+import static org.mockito.Matchers.any;
+import static org.mockito.Mockito.mock;
+import static org.mockito.Mockito.when;
+
+/**
+ * Tests for {@link DisabledIfCondition} that verify actual condition evaluation
+ * results and exception handling; whereas, {@link DisabledIfTestCase} only tests
+ * the <em>happy paths</em>.
+ *
+ * @author Sam Brannen
+ * @since 5.0
+ * @see DisabledIfTestCase
+ */
+class DisabledIfConditionTestCase {
+
+	private final DisabledIfCondition condition = new DisabledIfCondition();
+
+
+	@Test
+	void missingDisabledIf() {
+		IllegalStateException exception = expectThrows(IllegalStateException.class,
+			() -> condition.evaluate(buildExtensionContext("missingDisabledIf")));
+
+		assertThat(exception.getMessage(), startsWith("@DisabledIf must be present"));
+	}
+
+	@Test
+	void disabledByEmptyExpression() {
+		// @formatter:off
+		assertAll(
+			() -> assertExpressionIsBlank("emptyExpression"),
+			() -> assertExpressionIsBlank("blankExpression")
+		);
+		// @formatter:on
+	}
+
+	@Test
+	void invalidExpressionEvaluationType() {
+		IllegalStateException exception = expectThrows(IllegalStateException.class,
+			() -> condition.evaluate(buildExtensionContext("nonBooleanOrStringExpression")));
+
+		assertThat(exception.getMessage(),
+			is(equalTo("@DisabledIf(\"#{6 * 7}\") must evaluate to a String or a Boolean, not java.lang.Integer")));
+	}
+
+	@Test
+	void disabledWithCustomReason() {
+		assertResult(condition.evaluate(buildExtensionContext("customReason")), true, is(equalTo("Because... 42!")));
+	}
+
+	@Test
+	void disabledWithDefaultReason() {
+		assertResult(condition.evaluate(buildExtensionContext("defaultReason")), true,
+			endsWith("defaultReason() is disabled because @DisabledIf(\"#{1 + 1 eq 2}\") evaluated to true"));
+	}
+
+	@Test
+	void notDisabledWithDefaultReason() {
+		assertResult(condition.evaluate(buildExtensionContext("neverDisabledWithDefaultReason")), false, endsWith(
+			"neverDisabledWithDefaultReason() is enabled because @DisabledIf(\"false\") did not evaluate to true"));
+	}
+
+	// -------------------------------------------------------------------------
+
+	private TestExtensionContext buildExtensionContext(String methodName) {
+		Class<?> testClass = SpringTestCase.class;
+		Method method = ReflectionUtils.findMethod(getClass(), methodName);
+		Store store = mock(Store.class);
+		when(store.getOrComputeIfAbsent(any(), any(), any())).thenReturn(new TestContextManager(testClass));
+
+		TestExtensionContext extensionContext = mock(TestExtensionContext.class);
+		when(extensionContext.getTestClass()).thenReturn(Optional.of(testClass));
+		when(extensionContext.getElement()).thenReturn(Optional.of(method));
+		when(extensionContext.getStore(any())).thenReturn(store);
+		return extensionContext;
+	}
+
+	private void assertExpressionIsBlank(String methodName) {
+		IllegalStateException exception = expectThrows(IllegalStateException.class,
+			() -> condition.evaluate(buildExtensionContext(methodName)));
+
+		assertThat(exception.getMessage(), containsString("must not be blank"));
+	}
+
+	private void assertResult(ConditionEvaluationResult result, boolean disabled, Matcher<String> matcher) {
+		assertNotNull(result);
+
+		if (disabled) {
+			assertTrue(result.isDisabled());
+		}
+		else {
+			assertFalse(result.isDisabled());
+		}
+
+		Optional<String> reason = result.getReason();
+		assertTrue(reason.isPresent());
+		assertThat(reason.get(), matcher);
+	}
+
+	// -------------------------------------------------------------------------
+
+	@DisabledIf("")
+	private void emptyExpression() {
+	}
+
+	@DisabledIf("\t")
+	private void blankExpression() {
+	}
+
+	@DisabledIf("#{6 * 7}")
+	private void nonBooleanOrStringExpression() {
+	}
+
+	@DisabledIf(expression = "#{6 * 7 == 42}", reason = "Because... 42!")
+	private void customReason() {
+	}
+
+	@DisabledIf("#{1 + 1 eq 2}")
+	private void defaultReason() {
+	}
+
+	@DisabledIf("false")
+	private void neverDisabledWithDefaultReason() {
+	}
+
+
+	private static class SpringTestCase {
+
+		@Configuration
+		static class Config {
+		}
+	}
+
+}

spring-test/src/test/java/org/springframework/test/context/junit/jupiter/DisabledIfTestCase.java

@@ -33,6 +33,7 @@ import static org.junit.jupiter.api.Assertions.*;
  * @author Tadaya Tsuyukubo
  * @author Sam Brannen
  * @since 5.0
+ * @see DisabledIfConditionTestCase
  * @see DisabledIf
  * @see SpringExtension
  */