3 files changed, 82 insertions, 2 deletions
diff --git a/testdata/scad/features/child-tests.scad b/testdata/scad/features/child-tests.scad
index e4e3572..cf983b4 100644
--- a/testdata/scad/features/child-tests.scad
+++ b/testdata/scad/features/child-tests.scad
@@ -1,7 +1,7 @@
 $fn=16;
 
-module parent() {
-  for (i=[0:2]) {
+module parent(range=[0:2]) {
+  for (i=range) {
     translate([2.5*i,0,0]) child(i);
   }
 }
@@ -32,3 +32,6 @@ module parent3() {
 }
 
 translate([5,3,0]) parent3() { cube(); sphere(); }
+
+// Leaking variables to child list is not allowed
+translate([0,6,0]) parent(range=[0:1], testvar=10) { sphere(); cube(testvar, center=true);}
diff --git a/testdata/scad/misc/variable-scope-sub.scad b/testdata/scad/misc/variable-scope-sub.scad
new file mode 100644
index 0000000..fda9520
--- /dev/null
+++ b/testdata/scad/misc/variable-scope-sub.scad
@@ -0,0 +1,24 @@
+sub_global = 15;
+
+module submodule() {
+  echo($children);
+  echo(submodule_var);
+  submodule_var = 16;
+  module subsubmodule() {
+    echo($children);
+    subsubmodule_var = 17;
+    echo(subsubmodule_var);
+    child(0);
+  }
+  subsubmodule() {child(0); sphere();}
+}
+
+module submodule2() {
+  echo(sub_global);
+  echo($children);
+}
+
+module submain() {
+  echo(global_var); // Undefined global var
+  submodule() {submodule2() sphere(); cube();}
+}
diff --git a/testdata/scad/misc/variable-scope-tests.scad b/testdata/scad/misc/variable-scope-tests.scad
new file mode 100644
index 0000000..8426fbb
--- /dev/null
+++ b/testdata/scad/misc/variable-scope-tests.scad
@@ -0,0 +1,53 @@
+echo("special variable inheritance");
+module special_module(a) {
+  echo(a, $fn);
+  special_module2(a);
+}
+
+module special_module2(b) {
+  echo(a);
+  echo(b, $fn);
+}
+
+special_module(23, $fn=5);
+
+echo("inner variables shadows parameter");
+module inner_variables(a, b) {
+  b = 24;
+  echo(a, b);
+}
+
+inner_variables(5, 6);
+
+echo("user-defined special variables as parameter");
+module user_defined_special($b) {
+  echo($b);
+  user_defined_special2();
+}
+
+module user_defined_special2() {
+  echo($b);
+}
+
+user_defined_special(7);
+
+echo("assign only visible in children's scope");
+module assigning() {
+  echo(c);
+}
+
+module assigning2(c) {
+  echo(c);
+}
+
+assign(c=5) {
+  assigning();
+  assigning2(c);
+}
+
+echo("undeclared variable can still be passed and used");
+module undeclared_var() {
+  echo(d);
+}
+
+undeclared_var(d=6);