add tests for msi widget

tests/widgets/test_widgets_msi.py

@@ -0,0 +1,65 @@
+import pytest
+
+from gopro_overlay.dimensions import Dimension
+from gopro_overlay.point import Coordinate
+from gopro_overlay.widgets.asi import AirspeedIndicator
+from gopro_overlay.widgets.msi import MotorspeedIndicator
+from gopro_overlay.widgets.widgets import Translate
+from tests.widgets import test_widgets_setup
+from tests.approval import approve_image
+from tests.widgets.test_widgets import time_rendering
+
+font = test_widgets_setup.font
+ts = test_widgets_setup.ts
+
+
+@pytest.mark.gfx
+@approve_image
+def test_gauge():
+    size = 256
+    return time_rendering(
+        name="test_gauge",
+        dimensions=Dimension(size, size),
+        widgets=[
+            MotorspeedIndicator(
+                size=size, font=font, green=40, yellow=46, end=200,
+                needle=1,
+                reading=lambda: 125
+            )
+        ]
+    )
+
+
+@pytest.mark.gfx
+@approve_image
+def test_gauge_rotate_90():
+    size = 256
+    return time_rendering(
+        name="test_gauge_rotate_90",
+        dimensions=Dimension(size, size),
+        widgets=[
+            MotorspeedIndicator(
+                size=size, font=font, green=40, yellow=46, end=200,
+                needle=1,
+                rotate=90,
+                reading=lambda: 125
+            )
+        ]
+    )
+
+
+@pytest.mark.gfx
+@approve_image
+def test_no_needle():
+    size = 256
+    return time_rendering(
+        name="test_gauge",
+        dimensions=Dimension(size, size),
+        widgets=[
+            MotorspeedIndicator(
+                size=size, font=font, green=40, yellow=46, end=200,
+                needle=0,
+                reading=lambda: 125
+            )
+        ]
+    )