add test_calib.py

tests/test_calib.py

@@ -0,0 +1,35 @@
+from amodem import calib
+
+from io import BytesIO
+
+
+class ProcessMock(object):
+    def __init__(self):
+        self.buf = BytesIO()
+        self.stdin = self
+        self.stdout = self
+
+    def __call__(self, *args, **kwargs):
+        return self
+
+    def kill(self):
+        pass
+
+    def write(self, data):
+        self.buf.write(data)
+        if self.buf.tell() > 1e6:
+            raise KeyboardInterrupt
+
+    def read(self, n):
+        return self.buf.read(n)
+
+
+def verify(msg):
+    assert msg == calib.fmt.format(1, 1, 0, 1)
+
+
+def test():
+    p = ProcessMock()
+    calib.send(p)
+    p.buf.seek(0)
+    calib.recv(p, reporter=verify)