Correct import error (#20)

* correct noop import (fixes #19)
* require luma.core 1.0.0 or newer
* add test for clut module
* add segment_mapper test

* add more emulator tests

CHANGES.rst

@@ -4,6 +4,8 @@ ChangeLog
 +------------+---------------------------------------------------------------------+------------+
 | Version    | Description                                                         | Date       |
 +============+=====================================================================+============+
+| *upcoming* | * Correct ``noop`` import                                           |            |
++------------+---------------------------------------------------------------------+------------+
 | **0.2.4**  | * Move show/hide/contrast methods into emulator                     | 2017/04/30 |
 |            | * Add segment mapper                                                |            |
 |            | * Refactor tests                                                    |            |

luma/emulator/device.py

@@ -17,7 +17,7 @@
 from PIL import Image, ImageFont, ImageDraw
 
 from luma.core.device import device
-from luma.core.serial import noop
+from luma.core.interface.serial import noop
 from luma.emulator.render import transformer
 from luma.emulator.clut import rgb2short
 from luma.emulator.segment_mapper import regular

setup.py

@@ -44,7 +44,7 @@ def read_file(fname):
         "luma/emulator/images/7-segment.png"
     ]},
     install_requires=[
-        "luma.core>=0.2.0",
+        "luma.core>=1.0.0",
         "pygame"
     ],
     setup_requires=pytest_runner,

tests/test_clut.py

@@ -0,0 +1,14 @@
+#!/usr/bin/env python
+# -*- coding: utf-8 -*-
+# Copyright (c) 2017 Richard Hull and contributors
+# See LICENSE.rst for details.
+
+"""
+Tests for :py:class:`luma.emulator.clut`.
+"""
+
+from luma.emulator.clut import rgb2short
+
+
+def test_rgb2short():
+    assert rgb2short(100, 100, 100) == 59

tests/test_emulator.py

@@ -23,6 +23,18 @@ def test_cleanup():
     device.cleanup()
 
 
+def test_show():
+    device = emulator(1, 2, 3, 'RGB', 'none', 6)
+    device.show()
+    assert device._contrast == 1.0
+
+
+def test_hide():
+    device = emulator(1, 2, 3, 'RGB', 'none', 6)
+    device.hide()
+    assert device._contrast == 0.0
+
+
 def test_alpha():
     w, h = 100, 50
     device = emulator(width=w, height=h, rotate=3, mode='RGB',

tests/test_segment_mapper.py

@@ -0,0 +1,16 @@
+#!/usr/bin/env python
+# -*- coding: utf-8 -*-
+# Copyright (c) 2017 Richard Hull and contributors
+# See LICENSE.rst for details.
+
+"""
+Tests for :py:class:`luma.emulator.segment_mapper`.
+"""
+
+from luma.emulator.segment_mapper import regular
+
+
+def test_regular():
+    result = [48, 109, 121, 51, 0, 127, 15, 78]
+    for index, val in enumerate(regular('1234 BTC')):
+        assert val == result[index]