Make BimorphMirrorChannel Movable (#977)

Add BimorphMirror ophyd class, with child class BimorphMirrorChannel.

src/dodal/devices/bimorph_mirror.py

@@ -41,7 +41,7 @@ class BimorphMirrorStatus(StrictEnum):
     ERROR = "Error"
 
 
-class BimorphMirrorChannel(StandardReadable, EpicsDevice):
+class BimorphMirrorChannel(StandardReadable, Movable, EpicsDevice):
     """Collection of PVs comprising a single bimorph channel.
 
     Attributes:
@@ -56,6 +56,15 @@ class BimorphMirrorChannel(StandardReadable, EpicsDevice):
     status: A[SignalR[BimorphMirrorOnOff], PvSuffix("STATUS"), Format.CONFIG_SIGNAL]
     shift: A[SignalW[float], PvSuffix("SHIFT")]
 
+    @AsyncStatus.wrap
+    async def set(self, value: float):
+        """Sets channel's VOUT to given value.
+
+        Args:
+            value: float to set VOUT to
+        """
+        await self.output_voltage.set(value)
+
 
 class BimorphMirror(StandardReadable, Movable):
     """Class to represent CAENels Bimorph Mirrors.

tests/devices/unit_tests/test_bimorph_mirror.py

@@ -152,3 +152,16 @@ async def test_init_mirror_with_invalid_channels_throws_error(number_of_channels
 async def test_init_mirror_with_zero_channels(number_of_channels):
     mirror = BimorphMirror(prefix="FAKE-PREFIX", number_of_channels=number_of_channels)
     assert len(mirror.channels) == 0
+
+
+@pytest.mark.parametrize("mirror", VALID_BIMORPH_CHANNELS, indirect=True)
+async def test_bimorph_mirror_channel_set(
+    mirror: BimorphMirror,
+    valid_bimorph_values: dict[int, float],
+):
+    for value, channel in zip(
+        valid_bimorph_values.values(), mirror.channels.values(), strict=True
+    ):
+        assert await channel.output_voltage.get_value() != value
+        await channel.set(value)
+        assert await channel.output_voltage.get_value() == value