A few tweaks that might improve performance on startup

... or couldn't hurt anyway.

1. Extends the definition of a web application for @ConditionalOnWebapp
so that a StandardEnvironment can be used (cutting out JNDI failures
for Environment properties)

2. Doesn't bother using StandardServletEnvironment in integration tests

3. Make the NON_ENUMERABLE_ENUMERABLES in PropertySourcesPropertyValues
static so they only get initialized once (not a huge issue at all)

spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/condition/OnWebApplicationCondition.java

@@ -74,6 +74,11 @@ class OnWebApplicationCondition extends SpringBootCondition {
 					.match("found web application StandardServletEnvironment");
 		}
 
+		if (context.getResourceLoader() instanceof WebApplicationContext) {
+			return ConditionOutcome
+					.match("found web application WebApplicationContext");
+		}
+
 		return ConditionOutcome.noMatch("not a web application");
 	}
 

spring-boot/src/main/java/org/springframework/boot/bind/PropertySourcesPropertyValues.java

@@ -48,10 +48,10 @@ public class PropertySourcesPropertyValues implements PropertyValues {
 
 	private final PropertySources propertySources;
 
-	private final Collection<String> NON_ENUMERABLE_ENUMERABLES = Arrays.asList(
+	private static final Collection<String> NON_ENUMERABLE_ENUMERABLES = Arrays.asList(
 			StandardEnvironment.SYSTEM_ENVIRONMENT_PROPERTY_SOURCE_NAME,
 			StandardEnvironment.SYSTEM_PROPERTIES_PROPERTY_SOURCE_NAME);
-
+	
 	/**
 	 * Create a new PropertyValues from the given PropertySources
 	 * @param propertySources a PropertySources instance
@@ -107,7 +107,7 @@ public class PropertySourcesPropertyValues implements PropertyValues {
 			PropertySourcesPropertyResolver resolver, String[] includes, String[] exacts) {
 		if (source.getPropertyNames().length > 0) {
 			for (String propertyName : source.getPropertyNames()) {
-				if (this.NON_ENUMERABLE_ENUMERABLES.contains(source.getName())
+				if (PropertySourcesPropertyValues.NON_ENUMERABLE_ENUMERABLES.contains(source.getName())
 						&& !PatternMatchUtils.simpleMatch(includes, propertyName)) {
 					continue;
 				}

spring-boot/src/main/java/org/springframework/boot/test/SpringApplicationContextLoader.java

@@ -50,7 +50,6 @@ import org.springframework.test.context.web.WebMergedContextConfiguration;
 import org.springframework.util.ObjectUtils;
 import org.springframework.util.StringUtils;
 import org.springframework.web.context.support.GenericWebApplicationContext;
-import org.springframework.web.context.support.StandardServletEnvironment;
 
 /**
  * A {@link ContextLoader} that can be used to test Spring Boot applications (those that
@@ -82,9 +81,6 @@ public class SpringApplicationContextLoader extends AbstractContextLoader {
 		SpringApplication application = getSpringApplication();
 		application.setSources(getSources(config));
 		ConfigurableEnvironment environment = new StandardEnvironment();
-		if (config instanceof WebMergedContextConfiguration) {
-			environment = new StandardServletEnvironment();
-		}
 		if (!ObjectUtils.isEmpty(config.getActiveProfiles())) {
 			String profiles = StringUtils.arrayToCommaDelimitedString(config
 					.getActiveProfiles());