Python: Add import regression for refined variable

python/ql/test/experimental/import-resolution/importflow.ql

@@ -11,6 +11,9 @@ private class SourceString extends DataFlow::Node {
   SourceString() {
     this.asExpr().(StrConst).getText() = contents and
     this.asExpr().getParent() instanceof Assign
+    or
+    this.asExpr().(ClassExpr).getInnerScope().getName() = "SOURCE" and
+    contents = "SOURCE"
   }
 
   string getContents() { result = contents }

python/ql/test/experimental/import-resolution/main.py

@@ -93,6 +93,10 @@ check("subpackage2_attr", subpackage2_attr, "subpackage2_attr", globals()) #$ pr
 from if_then_else import if_then_else_defined
 check("if_then_else_defined", if_then_else_defined, "if_defined", globals()) #$ prints=if_defined prints=else_defined_1 prints=else_defined_2
 
+# check that refined definitions are handled correctly
+import refined # $ imports=refined as=refined
+check("refined.SOURCE", refined.SOURCE, refined.SOURCE, globals()) #$ MISSING: prints=SOURCE
+
 exit(__file__)
 
 print()

python/ql/test/experimental/import-resolution/refined.py

@@ -0,0 +1,12 @@
+from trace import *
+enter(__file__)
+
+class SOURCE(object): pass
+
+check("SOURCE", SOURCE, SOURCE, globals()) #$ prints=SOURCE
+
+SOURCE.foo = 42
+
+check("SOURCE", SOURCE, SOURCE, globals()) #$ prints=SOURCE
+
+exit(__file__)