Explicitly make fragments option to BuildConfigurationValue#key an ImmutableSortedSet wherever possible, and use a known explicit ImmutableSortedSet in the case of two sets being equal. This is mainly a cosmetic cleanup for the sequel changes.

Also rename test-only methods in SkyframeExecutor to indicate that, and do a drive-by clean-up of a test that reported hard crashes confusingly because it wrapped RuntimeExceptions.

PiperOrigin-RevId: 182984572
diff --git a/src/main/java/com/google/devtools/build/lib/analysis/BuildView.java b/src/main/java/com/google/devtools/build/lib/analysis/BuildView.java
index 5097f42..ab9981b 100644
--- a/src/main/java/com/google/devtools/build/lib/analysis/BuildView.java
+++ b/src/main/java/com/google/devtools/build/lib/analysis/BuildView.java
@@ -26,6 +26,7 @@
 import com.google.common.collect.ImmutableMap;
 import com.google.common.collect.ImmutableMultimap;
 import com.google.common.collect.ImmutableSet;
+import com.google.common.collect.ImmutableSortedSet;
 import com.google.common.collect.Iterables;
 import com.google.common.collect.Lists;
 import com.google.common.collect.Multimap;
@@ -897,7 +898,7 @@
       throws EvalException, InvalidConfigurationException,
       InterruptedException, InconsistentAspectOrderException {
     return Collections2.transform(
-        skyframeExecutor.getConfiguredTargets(
+        skyframeExecutor.getConfiguredTargetsForTesting(
             eventHandler,
             ct.getConfiguration(),
             ImmutableSet.copyOf(
@@ -953,7 +954,7 @@
 
       @Override
       protected List<BuildConfiguration> getConfigurations(
-          Set<Class<? extends BuildConfiguration.Fragment>> fragments,
+          ImmutableSortedSet<Class<? extends BuildConfiguration.Fragment>> fragments,
           Iterable<BuildOptions> buildOptions) {
         Preconditions.checkArgument(ct.getConfiguration().fragmentClasses().equals(fragments));
         Dependency asDep = Dependency.withTransitionAndAspects(ct.getLabel(),
@@ -1018,7 +1019,7 @@
             eventHandler, target, configurations, toolchainContext);
 
     ImmutableMultimap<Dependency, ConfiguredTargetAndTarget> cts =
-        skyframeExecutor.getConfiguredTargetMap(
+        skyframeExecutor.getConfiguredTargetMapForTesting(
             eventHandler, target.getConfiguration(), ImmutableSet.copyOf(depNodeNames.values()));
 
     OrderedSetMultimap<Attribute, ConfiguredTargetAndTarget> result = OrderedSetMultimap.create();