micropython: add micropython component

components/language/micropython/tests/io/open_append.py

@@ -0,0 +1,37 @@
+try:
+    import uos as os
+except ImportError:
+    import os
+
+if not hasattr(os, "remove"):
+    print("SKIP")
+    raise SystemExit
+
+# cleanup in case testfile exists
+try:
+    os.remove("testfile")
+except OSError:
+    pass
+
+# Should create a file
+f = open("testfile", "a")
+f.write("foo")
+f.close()
+
+f = open("testfile")
+print(f.read())
+f.close()
+
+f = open("testfile", "a")
+f.write("bar")
+f.close()
+
+f = open("testfile")
+print(f.read())
+f.close()
+
+# cleanup
+try:
+    os.remove("testfile")
+except OSError:
+    pass