[NF] Add type input/output tests.

Belonging to [master]:
  - OpenModelica/OMCompiler#2822
  - OpenModelica/OpenModelica-testsuite#1088

Author: perost

flattening/modelica/scodeinst/ClassAttributes3.mo

@@ -0,0 +1,16 @@
+// name: ClassAttributes3
+// keywords:
+// status: correct
+// cflags: -d=newInst
+//
+
+model ClassAttributes3
+  type InputReal = input Real;
+  input InputReal x;
+end ClassAttributes3;
+
+// Result:
+// class ClassAttributes3
+//   input Real x;
+// end ClassAttributes3;
+// endResult

flattening/modelica/scodeinst/ClassAttributes4.mo

@@ -0,0 +1,20 @@
+// name: ClassAttributes3
+// keywords:
+// status: incorrect
+// cflags: -d=newInst
+//
+
+model ClassAttributes4
+  type InputReal = input Real;
+  output InputReal x;
+end ClassAttributes4;
+
+// Result:
+// Error processing file: ClassAttributes4.mo
+// [flattening/modelica/scodeinst/ClassAttributes4.mo:9:3-9:21:writable] Error: Invalid type prefix 'output' on component x, due to existing type prefix 'input'.
+//
+// # Error encountered! Exiting...
+// # Please check the error message and the flags.
+//
+// Execution failed!
+// endResult

flattening/modelica/scodeinst/Makefile

@@ -158,6 +158,8 @@ CevalZeros1.mo \
 ClassAsComponentError.mo \
 ClassAttributes1.mo \
 ClassAttributes2.mo \
+ClassAttributes3.mo \
+ClassAttributes4.mo \
 ClassExtends1.mo \
 ClassExtends2.mo \
 ClassExtends3.mo \