Ensure @activeprofiles replaces existing profiles

Update `SpringBootContextLoader` to both add `spring.profiles.active`
properties and to directly call `Environment.setActiveProfiles`.
The additional `setActiveProfiles` call prevents `AbstractEnvironment`
from accidentally loading `spring.profiles.active` properties directly
when `doGetActiveProfiles` is called.

Directly setting active profiles has only become necessary since we
started adding properties using the square bracket notation. Previously
we added a comma-separated list which would be picked up by both the
`AbstractEnvironment` and the `ConfigurationFileApplicationListener`.

Closes gh-21302

spring-boot-project/spring-boot-test/src/main/java/org/springframework/boot/test/context/SpringBootContextLoader.java

@@ -152,6 +152,8 @@ protected String[] getArgs(MergedContextConfiguration config) {
 	}
 
 	private void setActiveProfiles(ConfigurableEnvironment environment, String[] profiles) {
+		environment.setActiveProfiles(profiles);
+		// Also add as properties to override any application.properties
 		String[] pairs = new String[profiles.length];
 		for (int i = 0; i < profiles.length; i++) {
 			pairs[i] = "spring.profiles.active[" + i + "]=" + profiles[i];

spring-boot-project/spring-boot-test/src/test/java/org/springframework/boot/test/context/SpringBootTestWithActiveProfilesAndEnvironmentPropertyTests.java

@@ -0,0 +1,74 @@
+/*
+ * Copyright 2012-2020 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
+ *
+ *      https://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.boot.test.context;
+
+import java.util.LinkedHashMap;
+import java.util.Map;
+
+import org.junit.jupiter.api.Test;
+
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.core.env.ConfigurableEnvironment;
+import org.springframework.core.env.Environment;
+import org.springframework.core.env.MapPropertySource;
+import org.springframework.core.env.MutablePropertySources;
+import org.springframework.test.context.ActiveProfiles;
+import org.springframework.test.context.ContextConfiguration;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+/**
+ * Integration tests for {@link SpringBootTest @SpringBootTest} with an
+ * {@link ActiveProfiles @ActiveProfiles} annotation.
+ *
+ * @author Johnny Lim
+ * @author Phillip Webb
+ */
+@SpringBootTest
+@ActiveProfiles({ "test1", "test2" })
+@ContextConfiguration(loader = SpringBootTestWithActiveProfilesAndEnvironmentPropertyTests.Loader.class)
+public class SpringBootTestWithActiveProfilesAndEnvironmentPropertyTests {
+
+	@Autowired
+	private Environment environment;
+
+	@Test
+	void getActiveProfiles() {
+		assertThat(this.environment.getActiveProfiles()).containsOnly("test1", "test2");
+	}
+
+	@Configuration
+	static class Config {
+
+	}
+
+	static class Loader extends SpringBootContextLoader {
+
+		@Override
+		protected ConfigurableEnvironment getEnvironment() {
+			ConfigurableEnvironment environment = super.getEnvironment();
+			MutablePropertySources sources = environment.getPropertySources();
+			Map<String, Object> map = new LinkedHashMap<>();
+			map.put("spring.profiles.active", "local");
+			sources.addLast(new MapPropertySource("profiletest", map));
+			return environment;
+		}
+
+	}
+
+}

spring-boot-project/spring-boot-test/src/test/java/org/springframework/boot/test/context/SpringBootTestWithActiveProfilesAndSytemEnvironmentPropertyTests.java

@@ -0,0 +1,79 @@
+/*
+ * Copyright 2012-2020 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
+ *
+ *      https://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.boot.test.context;
+
+import java.util.LinkedHashMap;
+import java.util.Map;
+
+import org.junit.jupiter.api.Test;
+
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.core.env.ConfigurableEnvironment;
+import org.springframework.core.env.Environment;
+import org.springframework.core.env.MapPropertySource;
+import org.springframework.core.env.MutablePropertySources;
+import org.springframework.core.env.PropertySource;
+import org.springframework.core.env.StandardEnvironment;
+import org.springframework.test.context.ActiveProfiles;
+import org.springframework.test.context.ContextConfiguration;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+/**
+ * Integration tests for {@link SpringBootTest @SpringBootTest} with an
+ * {@link ActiveProfiles @ActiveProfiles} annotation.
+ *
+ * @author Johnny Lim
+ * @author Phillip Webb
+ */
+@SpringBootTest
+@ActiveProfiles({ "test1", "test2" })
+@ContextConfiguration(loader = SpringBootTestWithActiveProfilesAndSytemEnvironmentPropertyTests.Loader.class)
+public class SpringBootTestWithActiveProfilesAndSytemEnvironmentPropertyTests {
+
+	@Autowired
+	private Environment environment;
+
+	@Test
+	void getActiveProfiles() {
+		assertThat(this.environment.getActiveProfiles()).containsOnly("test1", "test2");
+	}
+
+	@Configuration
+	static class Config {
+
+	}
+
+	static class Loader extends SpringBootContextLoader {
+
+		@Override
+		@SuppressWarnings("unchecked")
+		protected ConfigurableEnvironment getEnvironment() {
+			ConfigurableEnvironment environment = super.getEnvironment();
+			MutablePropertySources sources = environment.getPropertySources();
+			PropertySource<?> source = sources.get(StandardEnvironment.SYSTEM_ENVIRONMENT_PROPERTY_SOURCE_NAME);
+			Map<String, Object> map = new LinkedHashMap<>((Map<String, Object>) source.getSource());
+			map.put("SPRING_PROFILES_ACTIVE", "local");
+			sources.replace(StandardEnvironment.SYSTEM_ENVIRONMENT_PROPERTY_SOURCE_NAME,
+					new MapPropertySource(StandardEnvironment.SYSTEM_ENVIRONMENT_PROPERTY_SOURCE_NAME, map));
+			return environment;
+		}
+
+	}
+
+}