- bytecodeTextMultifile - framework for bytecode text tests

with multiple Kotlin source files
- bytecodeTextMultifile/partMembersCall, initial import

compiler/backend/src/org/jetbrains/kotlin/codegen/ClassFileFactory.java

@@ -183,6 +183,16 @@ public class ClassFileFactory implements OutputFileCollection {
         return answer.toString();
     }
 
+    @NotNull
+    @TestOnly
+    public Map<String, String> createTextForEachFile() {
+        Map<String, String> answer = new LinkedHashMap<String, String>();
+        for (OutputFile file : asList()) {
+            answer.put(file.getRelativePath(), file.asText());
+        }
+        return answer;
+    }
+
     @NotNull
     public PackageCodegen forPackage(@NotNull FqName fqName, @NotNull Collection<JetFile> files) {
         assert !isDone : "Already done!";