micropython: add micropython component

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

@@ -0,0 +1,34 @@
+f = open("io/data/file1", "rb")
+print(f.seek(6))
+print(f.read(5))
+print(f.tell())
+
+print(f.seek(0, 1))
+print(f.read(4))
+print(f.tell())
+
+print(f.seek(-6, 2))
+print(f.read(20))
+print(f.tell())
+
+print(f.seek(0, 0))
+print(f.read(5))
+print(f.tell())
+
+f.close()
+
+# test text mode
+f = open("io/data/file1", "rt")
+print(f.seek(6))
+print(f.read(5))
+print(f.tell())
+f.close()
+
+# seek closed file
+f = open("io/data/file1", "r")
+f.close()
+try:
+    f.seek(1)
+except (OSError, ValueError):
+    # CPy raises ValueError, uPy raises OSError
+    print("OSError or ValueError")