Add flattening test case for external object located in extended class

Makefile

@@ -83,6 +83,7 @@ gitlibraries.log
 # Sorted by time it takes to run the tests...
 # DO NOT ADD ANYTHING HERE THAT YOU EXPECT WILL TAKE MORE THAN 5 SECONDS TO RUN IN THE NEXT 18 YEARS
 FASTLOGS= \
+modelicaexternal-objects.log \
 simulationalgorithms-functions.log \
 simulationarrays.log \
 simulationasserts.log \
@@ -208,6 +209,9 @@ modelicaothers.log: omc-diff
 modelicaexternal-functions.log: omc-diff
 	$(MAKE) -C flattening/modelica/external-functions -f Makefile test > $@
 	@echo $@ done
+modelicaexternal-objects.log: omc-diff
+	$(MAKE) -C flattening/modelica/external-objects -f Makefile test > $@
+	@echo $@ done
 modelicaequations.log: omc-diff
 	$(MAKE) -C flattening/modelica/equations -f Makefile test > $@
 	@echo $@ done

flattening/modelica/external-objects/Makefile

@@ -0,0 +1,49 @@
+# relative path to rtest
+TEST = ../../../rtest -v
+
+# Tests to run.
+TESTFILES = testExternalObject.mo
+
+# test that currently fail. Move up when fixed.
+FAILINGTESTFILES= \
+
+# Dependency files that are not .mo .mos or Makefile
+# Add them here or they will be cleaned.
+DEPENDENCIES = \
+ *.mo \
+ *.mos \
+ Makefile
+
+CLEAN = `ls | grep -w -v -f deps.tmp`
+
+.PHONY : test clean getdeps
+
+test :
+	@echo
+	@echo Running tests...
+	@echo
+	@echo OPENMODELICAHOME=" $(OPENMODELICAHOME) "
+	@$(TEST) $(TESTFILES)
+
+# Cleans all files that are not listed as dependencies
+clean :
+	@echo $(DEPENDENCIES) | sed 's/ /\\|/g' > deps.tmp
+	@rm -f $(CLEAN)
+
+# Run this if you want to list out the files (dependencies).
+# do it after cleaning and updating the folder
+# then you can get a list of file names (which must be dependencies
+# since you got them from repository + your own new files)
+# then add them to the DEPENDENCIES. You can find the
+# list in deps.txt
+getdeps:
+	@echo $(DEPENDENCIES) | sed 's/ /\\|/g' > deps.tmp
+	@echo $(CLEAN) | sed -r 's/deps.txt|deps.tmp//g' | sed 's/ / \\\n/g' > deps.txt
+	@echo Dependency list saved in deps.txt.
+	@echo Copy the list from deps.txt and add it to the Makefile @DEPENDENCIES
+
+failingtest :
+	@echo
+	@echo Running failing tests...
+	@echo
+	@$(TEST) $(FAILINGTESTFILES)

flattening/modelica/external-objects/testExternalObject.mo

@@ -0,0 +1,44 @@
+// name:     testExternalObject
+// keywords: external object
+// cflags:   +i=ExtObjectTest.Ex
+// status:   correct
+//
+// description: External object in extended class
+
+package ExtObjectTest
+  model Ex
+    package ExtPackage1 = ExtPackage;
+    ExtPackage1.ExtObj mapping = ExtPackage1.ExtObj();
+  end Ex;
+
+  package ExtPackage
+    class ExtObj
+      extends ExternalObject;
+      function constructor
+        output ExtObj mapping;
+        external "C" mapping = initMapping();
+      end constructor;
+      function destructor
+        input ExtObj mapping;
+        external "C" destroyMapping(mapping);
+      end destructor;
+    end ExtObj;
+  end ExtPackage;
+end ExtObjectTest;
+
+// Result:
+// function ExtObjectTest.Ex.ExtPackage1.ExtObj.constructor
+//   output ExtObjectTest.Ex.ExtPackage1.ExtObj mapping;
+//
+//   external "C" mapping = initMapping();
+// end ExtObjectTest.Ex.ExtPackage1.ExtObj.constructor;
+//
+// function ExtObjectTest.Ex.ExtPackage1.ExtObj.destructor
+//   input ExtObjectTest.Ex.ExtPackage1.ExtObj mapping;
+//
+//   external "C" destroyMapping(mapping);
+// end ExtObjectTest.Ex.ExtPackage1.ExtObj.destructor;
+//
+// class ExtObjectTest.Ex
+//   ExtObjectTest.Ex.ExtPackage1.ExtObj mapping = ExtObjectTest.Ex.ExtPackage1.ExtObj.constructor();
+// end ExtObjectTest.Ex;