Add some tests for profile behaviour

Ordering: profiles are applied in order (from the active profiles
list in the Environment), with the last one winning as far as
property values goes. This *does* mean that a profile activated
inside application.yml is applied last and hence takes precedence.
It's debatable whether that is the right semantics, but that's
what it is for now.

Re gh-342: a profile added via SpringApplication also takes
precedence over one added on the command line. Also debatable
but at least it's predictable.

Naming: a profile adds "#<profile>" to the end of a property source
name (no more, no less)

spring-boot/src/main/java/org/springframework/boot/context/config/ConfigFileApplicationListener.java

@@ -305,11 +305,8 @@ public class ConfigFileApplicationListener implements
 		private PropertySource<?> load(String resourceLocation, String profile)
 				throws IOException {
 			Resource resource = this.resourceLoader.getResource(resourceLocation);
-			if (resource != null && resource.exists()) {
+			if (resource != null) {
 				String name = "applicationConfig: " + resource.getDescription();
-				if (StringUtils.hasLength(profile)) {
-					name += " " + profile;
-				}
 				PropertySource<?> propertySource = this.propertiesLoader.load(resource,
 						name, profile);
 				if (propertySource != null) {

spring-boot/src/main/java/org/springframework/boot/env/PropertySourcesLoader.java

@@ -27,6 +27,7 @@ import org.springframework.core.env.PropertySource;
 import org.springframework.core.io.Resource;
 import org.springframework.core.io.support.SpringFactoriesLoader;
 import org.springframework.util.Assert;
+import org.springframework.util.StringUtils;
 
 /**
  * Utiltiy that can be used to {@link MutablePropertySources} using
@@ -70,7 +71,7 @@ public class PropertySourcesLoader {
 	 */
 	public PropertySource<?> load(Resource resource, String name, String profile)
 			throws IOException {
-		if (resource != null && resource.exists()) {
+		if (isFile(resource)) {
 			name = generatePropertySourceName(resource, name, profile);
 			for (PropertySourceLoader loader : this.loaders) {
 				if (canLoadFileExtension(loader, resource)) {
@@ -83,6 +84,13 @@ public class PropertySourcesLoader {
 		return null;
 	}
 
+	private boolean isFile(Resource resource) {
+		return resource != null
+				&& resource.exists()
+				&& StringUtils.hasText(StringUtils.getFilenameExtension(resource
+						.getFilename()));
+	}
+
 	private String generatePropertySourceName(Resource resource, String name,
 			String profile) {
 		if (name == null) {

spring-boot/src/test/java/org/springframework/boot/context/config/ConfigFileApplicationListenerTests.java

@@ -17,7 +17,10 @@
 package org.springframework.boot.context.config;
 
 import java.lang.reflect.Field;
+import java.util.ArrayList;
 import java.util.Arrays;
+import java.util.Collection;
+import java.util.List;
 
 import org.hamcrest.Description;
 import org.hamcrest.Matcher;
@@ -45,6 +48,7 @@ import static org.hamcrest.Matchers.equalTo;
 import static org.hamcrest.Matchers.not;
 import static org.hamcrest.Matchers.notNullValue;
 import static org.hamcrest.Matchers.nullValue;
+import static org.junit.Assert.assertEquals;
 import static org.junit.Assert.assertThat;
 
 /**
@@ -178,6 +182,20 @@ public class ConfigFileApplicationListenerTests {
 		String property = this.environment.getProperty("my.property");
 		assertThat(Arrays.asList(this.environment.getActiveProfiles()), contains("dev"));
 		assertThat(property, equalTo("fromdevprofile"));
+		ConfigurationPropertySources propertySource = (ConfigurationPropertySources) this.environment
+				.getPropertySources().get("applicationConfigurationProperties");
+		Collection<org.springframework.core.env.PropertySource<?>> sources = propertySource
+				.getSource();
+		assertEquals(2, sources.size());
+		List<String> names = new ArrayList<String>();
+		for (org.springframework.core.env.PropertySource<?> source : sources) {
+			names.add(source.getName());
+		}
+		assertThat(
+				names,
+				contains(
+						"applicationConfig: class path resource [testsetprofiles.yml]#dev",
+						"applicationConfig: class path resource [testsetprofiles.yml]"));
 	}
 
 	@Test
@@ -189,6 +207,30 @@ public class ConfigFileApplicationListenerTests {
 		assertThat(this.environment.getActiveProfiles(), equalTo(new String[] { "prod" }));
 	}
 
+	@Test
+	public void yamlProfileOrdering() throws Exception {
+		this.initializer.setSearchNames("threeprofiles");
+		this.environment.setActiveProfiles("A", "C");
+		this.initializer.onApplicationEvent(this.event);
+		assertThat(this.environment.getProperty("version"), equalTo("C"));
+	}
+
+	@Test
+	public void yamlProfileOrderingReverse() throws Exception {
+		this.initializer.setSearchNames("threeprofiles");
+		this.environment.setActiveProfiles("C", "A");
+		this.initializer.onApplicationEvent(this.event);
+		assertThat(this.environment.getProperty("version"), equalTo("A"));
+	}
+
+	@Test
+	public void yamlProfileOrderingOverride() throws Exception {
+		this.initializer.setSearchNames("threeprofiles-with-override");
+		this.environment.setActiveProfiles("C", "A");
+		this.initializer.onApplicationEvent(this.event);
+		assertThat(this.environment.getProperty("version"), equalTo("B"));
+	}
+
 	@Test
 	public void specificNameAndProfileFromExistingSource() throws Exception {
 		EnvironmentTestUtils.addEnvironment(this.environment,

spring-boot/src/test/resources/threeprofiles-with-override.yml

@@ -0,0 +1,12 @@
+---
+spring.profiles.active: B
+---
+spring.profiles: A
+version: A
+---
+spring.profiles: B
+version: B
+---
+spring.profiles: C
+version: C
+---

spring-boot/src/test/resources/threeprofiles.yml

@@ -0,0 +1,11 @@
+---
+---
+spring.profiles: A
+version: A
+---
+spring.profiles: B
+version: B
+---
+spring.profiles: C
+version: C
+---