Fixup tests for ADC detect.

Author: Gadgetoid

library/tests/conftest.py

@@ -14,6 +14,12 @@ def __init__(self, i2c_bus):
         self.regs[0x00:0x01] = 0x0f, 0x00
 
 
+class SMBusFakeDeviceNoTimeout(MockSMBus):
+    def __init__(self, i2c_bus):
+        MockSMBus.__init__(self, i2c_bus)
+        self.regs[0x00:0x01] = 0x0f, 0x80
+
+
 @pytest.fixture(scope='function', autouse=True)
 def cleanup():
     yield None
@@ -63,6 +69,16 @@ def smbus():
     del sys.modules['smbus']
 
 
+@pytest.fixture(scope='function', autouse=False)
+def smbus_notimeout():
+    """Mock smbus module."""
+    smbus = mock.MagicMock()
+    smbus.SMBus = SMBusFakeDeviceNoTimeout
+    sys.modules['smbus'] = smbus
+    yield smbus
+    del sys.modules['smbus']
+
+
 @pytest.fixture(scope='function', autouse=False)
 def mocksmbus():
     """Mock smbus module."""

library/tests/test_setup.py

@@ -18,7 +18,7 @@ def test_gas_unavailable(GPIO, mocksmbus):
         gas.read_all()
 
 
-def test_gas_available(GPIO, mocksmbus):
+def test_gas_available(GPIO, smbus_notimeout):
     from enviroplus import gas
     gas._is_setup = False
     assert gas.available() == True