tests/basics: Add test for MICROPY_PY_ALL_INPLACE_SPECIAL_METHODS ops.

And enable this feature on unix, the coverage variant.  The .exp test file
is needed so the test can run on CPython versions prior to "@=" operator
support.

Signed-off-by: Damien George <damien@micropython.org>

ports/unix/variants/coverage/mpconfigvariant.h

@@ -39,6 +39,7 @@
 #define MICROPY_WARNINGS_CATEGORY      (1)
 #define MICROPY_MODULE_GETATTR         (1)
 #define MICROPY_PY_DELATTR_SETATTR     (1)
+#define MICROPY_PY_ALL_INPLACE_SPECIAL_METHODS (1)
 #define MICROPY_PY_REVERSE_SPECIAL_METHODS (1)
 #define MICROPY_PY_BUILTINS_MEMORYVIEW_ITEMSIZE (1)
 #define MICROPY_PY_BUILTINS_NEXT2      (1)

tests/basics/class_inplace_op2.py

@@ -0,0 +1,73 @@
+# Test inplace special methods enabled by MICROPY_PY_ALL_INPLACE_SPECIAL_METHODS
+
+
+class A:
+    def __imul__(self, other):
+        print("__imul__")
+        return self
+
+    def __imatmul__(self, other):
+        print("__imatmul__")
+        return self
+
+    def __ifloordiv__(self, other):
+        print("__ifloordiv__")
+        return self
+
+    def __itruediv__(self, other):
+        print("__itruediv__")
+        return self
+
+    def __imod__(self, other):
+        print("__imod__")
+        return self
+
+    def __ipow__(self, other):
+        print("__ipow__")
+        return self
+
+    def __ior__(self, other):
+        print("__ior__")
+        return self
+
+    def __ixor__(self, other):
+        print("__ixor__")
+        return self
+
+    def __iand__(self, other):
+        print("__iand__")
+        return self
+
+    def __ilshift__(self, other):
+        print("__ilshift__")
+        return self
+
+    def __irshift__(self, other):
+        print("__irshift__")
+        return self
+
+
+a = A()
+
+try:
+    a *= None
+except TypeError:
+    print("SKIP")
+    raise SystemExit
+
+a @= None
+a //= None
+a /= None
+a %= None
+a **= None
+a |= None
+a ^= None
+a &= None
+a <<= None
+a >>= None
+
+# Normal operator should not fallback to inplace operator
+try:
+    a * None
+except TypeError:
+    print("TypeError")

tests/basics/class_inplace_op2.py.exp

@@ -0,0 +1,12 @@
+__imul__
+__imatmul__
+__ifloordiv__
+__itruediv__
+__imod__
+__ipow__
+__ior__
+__ixor__
+__iand__
+__ilshift__
+__irshift__
+TypeError