From ecc635d551aa8fa5e02d2cb810b929ec92c54c3f Mon Sep 17 00:00:00 2001
From: Damien George <damien.p.george@gmail.com>
Date: Thu, 2 Mar 2017 16:09:16 +1100
Subject: [PATCH] tests/extmod: Add test for machine.Signal class.

---
 tests/extmod/machine_signal.py     | 40 ++++++++++++++++++++++++++++++
 tests/extmod/machine_signal.py.exp |  4 +++
 2 files changed, 44 insertions(+)
 create mode 100644 tests/extmod/machine_signal.py
 create mode 100644 tests/extmod/machine_signal.py.exp

diff --git a/tests/extmod/machine_signal.py b/tests/extmod/machine_signal.py
new file mode 100644
index 0000000000..401533f230
--- /dev/null
+++ b/tests/extmod/machine_signal.py
@@ -0,0 +1,40 @@
+# test machine.Signal class
+
+try:
+    import umachine as machine
+except ImportError:
+    import machine
+try:
+    machine.PinBase
+    machine.Signal
+except AttributeError:
+    print("SKIP")
+    import sys
+    sys.exit()
+
+class Pin(machine.PinBase):
+    def __init__(self):
+        self.v = 0
+
+    def value(self, v=None):
+        if v is None:
+            return self.v
+        else:
+            self.v = int(v)
+
+
+# test non-inverted
+p = Pin()
+s = machine.Signal(p)
+s.value(0)
+print(p.value(), s.value())
+s.value(1)
+print(p.value(), s.value())
+
+# test inverted, and using on/off methods
+p = Pin()
+s = machine.Signal(p, inverted=True)
+s.off()
+print(p.value(), s.value())
+s.on()
+print(p.value(), s.value())
diff --git a/tests/extmod/machine_signal.py.exp b/tests/extmod/machine_signal.py.exp
new file mode 100644
index 0000000000..7e9dd67966
--- /dev/null
+++ b/tests/extmod/machine_signal.py.exp
@@ -0,0 +1,4 @@
+0 0
+1 1
+1 0
+0 1