1 files changed, 54 insertions, 0 deletions
diff --git a/tests/basics/class_bind_self.py b/tests/basics/class_bind_self.py
new file mode 100644
index 0000000000..16e4f5ac95
--- /dev/null
+++ b/tests/basics/class_bind_self.py
@@ -0,0 +1,54 @@
+# test for correct binding of self when accessing attr of an instance
+
+class A:
+    def __init__(self, arg):
+        self.val = arg
+    def __str__(self):
+        return 'A.__str__ ' + str(self.val)
+    def __call__(self, arg):
+        return 'A.__call__', arg
+    def foo(self, arg):
+        return 'A.foo', self.val, arg
+
+def make_closure(x_in):
+    x = x_in
+    def closure(y):
+        return x, y is c
+    return closure
+
+class C:
+    # these act like methods and bind self
+
+    def f1(self, arg):
+        return 'C.f1', self is c, arg
+    f2 = lambda self, arg: ('C.f2', self is c, arg)
+    f3 = make_closure('f3') # closure
+    def f4(self, arg): # generator
+        yield self is c, arg
+
+    # these act like simple variables and don't bind self
+
+    f5 = int # builtin type
+    f6 = abs # builtin function
+    f7 = A # user type
+    f8 = A(8) # user instance which is callable
+    f9 = A(9).foo # user bound method
+
+c = C()
+print(c.f1(1))
+print(c.f2(2))
+print(c.f3())
+print(next(c.f4(4)))
+print(c.f5(5))
+#print(c.f6(-6)) not working in uPy
+print(c.f7(7))
+print(c.f8(8))
+print(c.f9(9))
+
+# not working in uPy
+#class C(list):
+#    # this acts like a method and binds self
+#    f1 = list.extend
+#c = C()
+#c.f1([3, 1, 2])
+#print(c)