micropython: add micropython component

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

@@ -0,0 +1,21 @@
+f = open("io/data/file1")
+
+with f as f2:
+    print(f2.read())
+
+# File should be closed
+try:
+    f.read()
+except:
+    # Note: CPython and us throw different exception trying to read from
+    # close file.
+    print("can't read file after with")
+
+
+# Regression test: test that exception in with initialization properly
+# thrown and doesn't crash.
+try:
+    with open("__non_existent", "r"):
+        pass
+except OSError:
+    print("OSError")