[NF] Add dimension deduction test.

Belonging to [master]:
  - OpenModelica/OMCompiler#2454
  - OpenModelica/OpenModelica-testsuite#956

flattening/modelica/scodeinst/DimUnknown8.mo

@@ -0,0 +1,35 @@
+// name: DimUnknown8
+// keywords:
+// status: correct
+// cflags: -d=newInst
+//
+//
+
+model A
+  Real x[:];
+  Real y[size(x, 1)];
+end A;
+
+model DimUnknown8
+  A a[2](each x = {1, 2, 3});
+end DimUnknown8;
+
+// Result:
+// class DimUnknown8
+//   Real a[1].x[1];
+//   Real a[1].x[2];
+//   Real a[1].x[3];
+//   Real a[1].y[1];
+//   Real a[1].y[2];
+//   Real a[1].y[3];
+//   Real a[2].x[1];
+//   Real a[2].x[2];
+//   Real a[2].x[3];
+//   Real a[2].y[1];
+//   Real a[2].y[2];
+//   Real a[2].y[3];
+// equation
+//   a[1].x = {1.0, 2.0, 3.0};
+//   a[2].x = {1.0, 2.0, 3.0};
+// end DimUnknown8;
+// endResult

flattening/modelica/scodeinst/Makefile

@@ -232,6 +232,7 @@ DimUnknown4.mo \
 DimUnknown5.mo \
 DimUnknown6.mo \
 DimUnknown7.mo \
+DimUnknown8.mo \
 dim1.mo \
 dim13.mo \
 dim16.mo \