Swift: Add test containing local declarations.

swift/ql/test/library-tests/controlflow/graph/Cfg.expected

@@ -4785,3 +4785,99 @@ cfg.swift:
 
 #  405| DeclRefExpr
 #-----|  -> TupleExpr
+
+#  410| TBD (YieldStmt)
+#-----|  -> exit AccessorDecl (normal)
+
+#  410| enter AccessorDecl
+
+#  410| enter AccessorDecl
+
+#  410| enter AccessorDecl
+#-----|  -> TBD (YieldStmt)
+
+#  410| exit AccessorDecl
+
+#  410| exit AccessorDecl
+
+#  410| exit AccessorDecl
+
+#  410| exit AccessorDecl (normal)
+#-----|  -> exit AccessorDecl
+
+#  410| exit AccessorDecl (normal)
+#-----|  -> exit AccessorDecl
+
+#  410| exit AccessorDecl (normal)
+#-----|  -> exit AccessorDecl
+
+#  411| enter ConstructorDecl
+#-----|  -> DeclRefExpr
+
+#  411| exit ConstructorDecl
+
+#  411| exit ConstructorDecl (normal)
+#-----|  -> exit ConstructorDecl
+
+#  412| DeclRefExpr
+#-----|  -> MemberRefExpr
+
+#  412| MemberRefExpr
+#-----|  -> IntegerLiteralExpr
+
+#  412| AssignExpr
+#-----|  -> ReturnStmt
+
+#  412| IntegerLiteralExpr
+#-----|  -> AssignExpr
+
+#  413| ReturnStmt
+#-----| return -> exit ConstructorDecl (normal)
+
+#  417| TBD (YieldStmt)
+#-----|  -> exit AccessorDecl (normal)
+
+#  417| enter AccessorDecl
+
+#  417| enter AccessorDecl
+
+#  417| enter AccessorDecl
+#-----|  -> TBD (YieldStmt)
+
+#  417| exit AccessorDecl
+
+#  417| exit AccessorDecl
+
+#  417| exit AccessorDecl
+
+#  417| exit AccessorDecl (normal)
+#-----|  -> exit AccessorDecl
+
+#  417| exit AccessorDecl (normal)
+#-----|  -> exit AccessorDecl
+
+#  417| exit AccessorDecl (normal)
+#-----|  -> exit AccessorDecl
+
+#  418| enter ConstructorDecl
+#-----|  -> DeclRefExpr
+
+#  418| exit ConstructorDecl
+
+#  418| exit ConstructorDecl (normal)
+#-----|  -> exit ConstructorDecl
+
+#  419| DeclRefExpr
+#-----|  -> MemberRefExpr
+
+#  419| MemberRefExpr
+#-----|  -> IntegerLiteralExpr
+
+#  419| AssignExpr
+#-----|  -> ReturnStmt
+
+#  419| IntegerLiteralExpr
+#-----|  -> AssignExpr
+
+#  420| ReturnStmt
+#-----| return -> exit ConstructorDecl (normal)

swift/ql/test/library-tests/controlflow/graph/cfg.swift

@@ -403,4 +403,41 @@ class Structors {
 
 func dictionaryLiteral(x: Int, y: Int) -> [String: Int] {
   return ["x": x, "y": y]
+}
+
+func localDeclarations() -> Int {
+  class MyLocalClass {
+    var x: Int
+    init() {
+      x = 10
+    }
+  }
+
+  struct MyLocalStruct {
+    var x: Int
+    init() {
+      x = 10
+    }
+  }
+
+  enum MyLocalEnum {
+    case A
+    case B
+  }
+
+  var myLocalVar : Int;
+
+  // Error: declaration is only valid at file scope
+  // extension Int {
+  //   func myExtensionMethod() -> Int {
+  //     return self
+  //   }
+  // }
+
+  // protocol 'MyProtocol' cannot be nested inside another declaration
+  //   protocol MyProtocol {
+  //     func myMethod()
+  //   }
+
+  return 0
 }