Add tests for ExtruderManager

tests/TestExtruderManager.py

@@ -0,0 +1,31 @@
+
+from unittest.mock import MagicMock, patch
+
+
+def createMockedExtruder(extruder_id):
+    extruder = MagicMock()
+    extruder.getId = MagicMock(return_value = extruder_id)
+    return extruder
+
+
+def test_getAllExtruderSettings(extruder_manager):
+    extruder_1 = createMockedExtruder("extruder_1")
+    extruder_1.getProperty = MagicMock(return_value ="beep")
+    extruder_2 = createMockedExtruder("extruder_2")
+    extruder_2.getProperty = MagicMock(return_value="zomg")
+    extruder_manager.getActiveExtruderStacks = MagicMock(return_value = [extruder_1, extruder_2])
+    assert extruder_manager.getAllExtruderSettings("whatever", "value") == ["beep", "zomg"]
+
+
+def test_registerExtruder(extruder_manager):
+    extruder = createMockedExtruder("beep")
+    extruder.getMetaDataEntry = MagicMock(return_value = "0")  # because the extruder position gets called
+
+    extruder_manager.extrudersChanged = MagicMock()
+    extruder_manager.registerExtruder(extruder, "zomg")
+
+    assert extruder_manager.extrudersChanged.emit.call_count == 1
+
+    # Doing it again should not trigger anything
+    extruder_manager.registerExtruder(extruder, "zomg")
+    assert extruder_manager.extrudersChanged.emit.call_count == 1