tests: Add basics test for gc module.

tests/basics/gc1.py

@@ -0,0 +1,22 @@
+# basic tests for gc module
+
+try:
+    import gc
+except ImportError:
+    print("SKIP")
+    import sys
+    sys.exit()
+
+print(gc.isenabled())
+gc.disable()
+print(gc.isenabled())
+gc.enable()
+print(gc.isenabled())
+
+gc.collect()
+
+if hasattr(gc, 'mem_free'):
+    # uPy has these extra functions
+    # just test they execute and return an int
+    assert type(gc.mem_free()) is int
+    assert type(gc.mem_alloc()) is int