Merge pull request #57 from pimoroni/test-tweaks-and-linting

[EVA-2020-02-2.git] / library / tests / test_setup.py

diff --git a/library/tests/test_setup.py b/library/tests/test_setup.py
index 95080b6bc63293166d7a36c75b4d8a3eb6bca9f2..6b6658cb5c50821eda447498b4e3faacd9961b52 100644 (file)
--- a/library/tests/test_setup.py
+++ b/library/tests/test_setup.py
@@ -2,6 +2,28 @@ import sys
 import mock
 
 
 import mock
 
 

+def force_reimport(module):
+    """Force the module under test to be re-imported.
+
+    Because pytest runs all tests within the same scope (this makes me cry)
+    we have to do some manual housekeeping to avoid tests polluting each other.
+
+    Since conftest.py already does some sys.modules mangling I see no reason not to
+    do the same thing here.
+    """
+    if "." in module:
+        steps = module.split(".")
+    else:
+        steps = [module]
+    
+    for i in range(len(steps)):
+        module = ".".join(steps[0:i + 1])
+        try:
+            del sys.modules[module]
+        except KeyError:
+            pass
+
+

 def test_gas_setup(GPIO, smbus):
     from enviroplus import gas
     gas._is_setup = False
 def test_gas_setup(GPIO, smbus):
     from enviroplus import gas
     gas._is_setup = False


@@ -49,7 +71,8 @@ def test_gas_read_adc_default_gain(GPIO, smbus):
     gas._is_setup = False
 
     gas.enable_adc(True)
     gas._is_setup = False
 
     gas.enable_adc(True)

-    assert gas.read_adc() == 0.255
+    gas.set_adc_gain(gas.MICS6814_GAIN)
+    assert gas.read_adc() == 0.765

 
 
 def test_gas_read_adc_str(GPIO, smbus):
 
 
 def test_gas_read_adc_str(GPIO, smbus):


@@ -59,3 +82,12 @@ def test_gas_read_adc_str(GPIO, smbus):
     gas.enable_adc(True)
     gas.set_adc_gain(2.048)
     assert 'ADC' in str(gas.read_all())
     gas.enable_adc(True)
     gas.set_adc_gain(2.048)
     assert 'ADC' in str(gas.read_all())

+
+
+def test_gas_cleanup(GPIO, smbus):
+    force_reimport('enviroplus.gas')
+    from enviroplus import gas
+
+    gas.cleanup()
+
+    GPIO.output.assert_called_with(gas.MICS6814_HEATER_PIN, 0)