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a9b885070e
Java generics are too limited to do what we need. This refactors generic code previously in Unit and Measure into unit-specific classes that can have unit-safe math operations (notably, times and divide) that can return values in known units instead of a wildcarded Measure<?>. Unit-specific measure implementations are automatically generated by ./wpiunits/generate_units.py, which generates generic interfaces and mutable and immutable implementations of those interfaces. These make up the bulk of the diff of this PR (approximately 9300 LOC). This also adds units for angular and linear velocities, accelerations, and momenta; moment of inertia; and torque.
36 lines
1.2 KiB
Java
36 lines
1.2 KiB
Java
// Copyright (c) FIRST and other WPILib contributors.
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// Open Source Software; you can modify and/or share it under the terms of
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// the WPILib BSD license file in the root directory of this project.
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package edu.wpi.first.units;
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import static org.junit.jupiter.api.Assertions.assertEquals;
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import static org.junit.jupiter.api.Assertions.assertTrue;
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import org.junit.jupiter.api.Test;
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class DistanceUnitTest {
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@Test
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void testBaseUnitDistancePerTime() {
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LinearVelocityUnit anonBaseUnit =
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new DistanceUnit(null, 1, "D", "d").per(new TimeUnit(null, 1, "T", "t"));
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assertTrue(Units.MetersPerSecond.equivalent(anonBaseUnit));
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}
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@Test
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void testFeetPerSecond() {
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LinearVelocityUnit feetPerMillisecond = Units.Feet.per(Units.Milliseconds);
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// one foot per millisecond
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// = (1 / 3.28084) meters per (1 / 1000) seconds
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// = (1000 / 3.28084) meters per second
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double asBaseMeasure = feetPerMillisecond.of(1).in(Units.MetersPerSecond);
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assertEquals(1000 / 3.28084, asBaseMeasure, 1e-3);
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// one meter per second = 1 mm per millisecond = 0.00328084 feet per millisecond
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double asContrivedMeasure = Units.MetersPerSecond.of(1).in(feetPerMillisecond);
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assertEquals(3.28084 / 1000, asContrivedMeasure, 1e-8);
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}
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}
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