micropython: add micropython component

components/language/micropython/tests/basics/io_stringio1.py

@@ -0,0 +1,50 @@
+try:
+    import uio as io
+except ImportError:
+    import io
+
+a = io.StringIO()
+print('io.StringIO' in repr(a))
+print(a.getvalue())
+print(a.read())
+
+a = io.StringIO("foobar")
+print(a.getvalue())
+print(a.read())
+print(a.read())
+
+a = io.StringIO()
+a.write("foo")
+print(a.getvalue())
+
+a = io.StringIO("foo")
+a.write("12")
+print(a.getvalue())
+
+a = io.StringIO("foo")
+a.write("123")
+print(a.getvalue())
+
+a = io.StringIO("foo")
+a.write("1234")
+print(a.getvalue())
+
+a = io.StringIO()
+a.write("foo")
+print(a.read())
+
+a = io.StringIO()
+print(a.tell())
+a.write("foo")
+print(a.tell())
+
+a = io.StringIO()
+a.close()
+for f in [a.read, a.getvalue, lambda:a.write("")]:
+    # CPython throws for operations on closed I/O, MicroPython makes
+    # the underlying string empty unless MICROPY_CPYTHON_COMPAT defined
+    try:
+        f()
+        print("ValueError")
+    except ValueError:
+        print("ValueError")