Introduce @DisabledIf annotation for JUnit 5

This commit introduces @DisabledIf annotation that takes SpEL as a
condition.  The condition is evaluated at run time whether to disable
JUnit 5 (Jupiter) test method/class.

Issue: SPR-14614

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

@@ -0,0 +1,123 @@
+/*
+ * 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 org.junit.jupiter.api.Nested;
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.extension.ExtendWith;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.test.context.ContextConfiguration;
+import org.springframework.test.context.TestPropertySource;
+
+import static org.junit.jupiter.api.Assertions.fail;
+
+/**
+ * Integration tests which demonstrate usage of {@link DisabledIf @DisabledIf}
+ * enabled by {@link SpringExtension} in a JUnit 5 (Jupiter) environment.
+ *
+ * @author Tadaya Tsuyukubo
+ * @since 5.0
+ * @see DisabledIf
+ * @see SpringExtension
+ */
+class DisabledIfTestCase {
+
+	@ExtendWith(SpringExtension.class)
+	@ContextConfiguration(classes = Config.class)
+	@TestPropertySource(properties = "foo = true")
+	@Nested
+	class DisabledIfOnMethodTestCase {
+
+		@Test
+		@DisabledIf("true")
+		void disabledByStringTrue() {
+			fail("This test must be disabled");
+		}
+
+		@Test
+		@DisabledIf("TrUe")
+		void disabledByStringTrueIgnoreCase() {
+			fail("This test must be disabled");
+		}
+
+		@Test
+		@DisabledIf("${foo}")
+		void disabledByPropertyPlaceholder() {
+			fail("This test must be disabled");
+		}
+
+		@Test
+		@DisabledIf("#{T(java.lang.Boolean).TRUE}")
+		void disabledBySpelBoolean() {
+			fail("This test must be disabled");
+		}
+
+		@Test
+		@DisabledIf("#{'tr' + 'ue'}")
+		void disabledBySpelStringConcatenation() {
+			fail("This test must be disabled");
+		}
+
+		@Test
+		@DisabledIf("#{@booleanTrueBean}")
+		void disabledBySpelBooleanTrueBean() {
+			fail("This test must be disabled");
+		}
+
+		@Test
+		@DisabledIf("#{@stringTrueBean}")
+		void disabledBySpelStringTrueBean() {
+			fail("This test must be disabled");
+		}
+
+	}
+
+	@ExtendWith(SpringExtension.class)
+	@ContextConfiguration(classes = Config.class)
+	@Nested
+	@DisabledIf("true")
+	class DisabledIfOnClassTestCase {
+
+		@Test
+		void foo() {
+			fail("This test must be disabled");
+		}
+
+		// Even though method level condition is not disabling test, class level condition should take precedence
+		@Test
+		@DisabledIf("false")
+		void bar() {
+			fail("This test must be disabled");
+		}
+
+	}
+
+	@Configuration
+	static class Config {
+		@Bean
+		Boolean booleanTrueBean() {
+			return Boolean.TRUE;
+		}
+
+		@Bean
+		String stringTrueBean() {
+			return "true";
+		}
+	}
+
+}