Add speed to units system (#58437)

* Use speed units in unit system

* Use more obvious conversion factor for unit system speed test

* Use wind_speed instead of speed, use m/s

tests/util/test_unit_system.py

@@ -9,10 +9,12 @@ from homeassistant.const import (
     MASS_GRAMS,
     PRESSURE,
     PRESSURE_PA,
+    SPEED_METERS_PER_SECOND,
     TEMP_CELSIUS,
     TEMPERATURE,
     VOLUME,
     VOLUME_LITERS,
+    WIND_SPEED,
 )
 from homeassistant.util.unit_system import IMPERIAL_SYSTEM, METRIC_SYSTEM, UnitSystem
 
@@ -27,6 +29,7 @@ def test_invalid_units():
             SYSTEM_NAME,
             INVALID_UNIT,
             LENGTH_METERS,
+            SPEED_METERS_PER_SECOND,
             VOLUME_LITERS,
             MASS_GRAMS,
             PRESSURE_PA,
@@ -37,6 +40,7 @@ def test_invalid_units():
             SYSTEM_NAME,
             TEMP_CELSIUS,
             INVALID_UNIT,
+            SPEED_METERS_PER_SECOND,
             VOLUME_LITERS,
             MASS_GRAMS,
             PRESSURE_PA,
@@ -48,6 +52,7 @@ def test_invalid_units():
             TEMP_CELSIUS,
             LENGTH_METERS,
             INVALID_UNIT,
+            VOLUME_LITERS,
             MASS_GRAMS,
             PRESSURE_PA,
         )
@@ -57,6 +62,18 @@ def test_invalid_units():
             SYSTEM_NAME,
             TEMP_CELSIUS,
             LENGTH_METERS,
+            SPEED_METERS_PER_SECOND,
+            INVALID_UNIT,
+            MASS_GRAMS,
+            PRESSURE_PA,
+        )
+
+    with pytest.raises(ValueError):
+        UnitSystem(
+            SYSTEM_NAME,
+            TEMP_CELSIUS,
+            LENGTH_METERS,
+            SPEED_METERS_PER_SECOND,
             VOLUME_LITERS,
             INVALID_UNIT,
             PRESSURE_PA,
@@ -67,6 +84,7 @@ def test_invalid_units():
             SYSTEM_NAME,
             TEMP_CELSIUS,
             LENGTH_METERS,
+            SPEED_METERS_PER_SECOND,
             VOLUME_LITERS,
             MASS_GRAMS,
             INVALID_UNIT,
@@ -79,6 +97,8 @@ def test_invalid_value():
         METRIC_SYSTEM.length("25a", LENGTH_KILOMETERS)
     with pytest.raises(TypeError):
         METRIC_SYSTEM.temperature("50K", TEMP_CELSIUS)
+    with pytest.raises(TypeError):
+        METRIC_SYSTEM.wind_speed("50km/h", SPEED_METERS_PER_SECOND)
     with pytest.raises(TypeError):
         METRIC_SYSTEM.volume("50L", VOLUME_LITERS)
     with pytest.raises(TypeError):
@@ -89,6 +109,7 @@ def test_as_dict():
     """Test that the as_dict() method returns the expected dictionary."""
     expected = {
         LENGTH: LENGTH_KILOMETERS,
+        WIND_SPEED: SPEED_METERS_PER_SECOND,
         TEMPERATURE: TEMP_CELSIUS,
         VOLUME: VOLUME_LITERS,
         MASS: MASS_GRAMS,
@@ -142,6 +163,29 @@ def test_length_to_imperial():
     assert IMPERIAL_SYSTEM.length(5, METRIC_SYSTEM.length_unit) == 3.106855
 
 
+def test_wind_speed_unknown_unit():
+    """Test wind_speed conversion with unknown from unit."""
+    with pytest.raises(ValueError):
+        METRIC_SYSTEM.length(5, "turtles")
+
+
+def test_wind_speed_to_metric():
+    """Test length conversion to metric system."""
+    assert METRIC_SYSTEM.wind_speed(100, METRIC_SYSTEM.wind_speed_unit) == 100
+    # 1 m/s is about 2.237 mph
+    assert METRIC_SYSTEM.wind_speed(
+        2237, IMPERIAL_SYSTEM.wind_speed_unit
+    ) == pytest.approx(1000, abs=0.1)
+
+
+def test_wind_speed_to_imperial():
+    """Test wind_speed conversion to imperial system."""
+    assert IMPERIAL_SYSTEM.wind_speed(100, IMPERIAL_SYSTEM.wind_speed_unit) == 100
+    assert IMPERIAL_SYSTEM.wind_speed(
+        1000, METRIC_SYSTEM.wind_speed_unit
+    ) == pytest.approx(2237, abs=0.1)
+
+
 def test_pressure_same_unit():
     """Test no conversion happens if to unit is same as from unit."""
     assert METRIC_SYSTEM.pressure(5, METRIC_SYSTEM.pressure_unit) == 5
@@ -172,6 +216,7 @@ def test_pressure_to_imperial():
 def test_properties():
     """Test the unit properties are returned as expected."""
     assert METRIC_SYSTEM.length_unit == LENGTH_KILOMETERS
+    assert METRIC_SYSTEM.wind_speed_unit == SPEED_METERS_PER_SECOND
     assert METRIC_SYSTEM.temperature_unit == TEMP_CELSIUS
     assert METRIC_SYSTEM.mass_unit == MASS_GRAMS
     assert METRIC_SYSTEM.volume_unit == VOLUME_LITERS