py/emitnative: Make viper funcs run with their correct globals context.

Viper functions will now capture the globals at the point they were defined
and use these globals when executing.

2 files changed, 21 insertions, 0 deletions

diff --git a/tests/micropython/viper_globals.py b/tests/micropython/viper_globals.py
new file mode 100644
index 000000000..9c68dc3da
--- /dev/null
+++ b/tests/micropython/viper_globals.py
@@ -0,0 +1,19 @@
+# test that viper functions capture their globals context
+
+gl = {}
+
+exec("""
+@micropython.viper
+def f():
+    return x
+""", gl)
+
+# x is not yet in the globals, f should not see it
+try:
+    print(gl['f']())
+except NameError:
+    print('NameError')
+
+# x is in globals, f should now see it
+gl['x'] = 123
+print(gl['f']())
diff --git a/tests/micropython/viper_globals.py.exp b/tests/micropython/viper_globals.py.exp
new file mode 100644
index 000000000..5731b89c1
--- /dev/null
+++ b/tests/micropython/viper_globals.py.exp
@@ -0,0 +1,2 @@
+NameError
+123