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[wpiunits] Add Measure.divide(Measure<U2>) (#6611)

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Wispy
2024-05-15 08:22:38 -05:00
committed by GitHub
parent b0d3bf4ddf
commit 7fbbecb5b7
5 changed files with 75 additions and 11 deletions
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7
wpiunits/src/test/java/edu/wpi/first/units/EncoderTest.java
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@@ -7,7 +7,6 @@ package edu.wpi.first.units;
import static edu.wpi.first.units.Units.Inches;
import static edu.wpi.first.units.Units.Revolutions;
import static edu.wpi.first.units.Units.Second;
import static edu.wpi.first.units.Units.Value;
import static org.junit.jupiter.api.Assertions.assertEquals;
import org.junit.jupiter.api.Test;
@@ -46,14 +45,14 @@ class EncoderTest {
@Test
void testAsDistance() {
var ticksPerRevolution = Value.of(2048);
double ticksPerRevolution = 2048;
var encoder = new Encoder<Distance>();
// distance per rotation = (wheel circumference / gear ratio)
// distance per tick = distance per rotation / ticks per rotation
var wheelDiameter = Inches.of(6);
var gearRatio = Value.of(10); // 10:1 ratio
double gearRatio = 10; // 10:1 ratio
Measure<Distance> distancePerPulse =
wheelDiameter.times(Math.PI).divide(gearRatio).divide(ticksPerRevolution);
encoder.setDistancePerPulse(distancePerPulse);
@@ -74,7 +73,7 @@ class EncoderTest {
@Test
void testAsRevolutions() {
var ticksPerRevolution = Value.of(2048);
double ticksPerRevolution = 2048;
var encoder = new Encoder<Angle>();

34
wpiunits/src/test/java/edu/wpi/first/units/MeasureTest.java
View File

@@ -162,6 +162,40 @@ class MeasureTest {
assertEquals(exampleUnit.of(42 * 17 / (12 * 25.4)), m3.times(m4));
}
@Test
void testDivideMeasure() {
// Dimensionless divide
var m1 = Units.Meters.of(6);
var m2 = Units.Value.of(3);
var result = m1.divide(m2);
assertEquals(m1.divide(m2).magnitude(), 2);
assertEquals(result.unit(), Units.Meters);
// Velocity divide
var m3 = Units.Meters.of(8);
var m4 = Units.Meters.per(Units.Second).of(4);
result = m3.divide(m4);
assertEquals(result.magnitude(), 2);
assertEquals(result.unit(), Units.Second);
// Per divide
var m5 = Units.Volts.of(6);
var m6 = Units.Volts.per(Units.Meter).of(2);
result = m5.divide(m6);
assertEquals(result.magnitude(), 3);
assertEquals(result.unit(), Units.Meter);
// Fallthrough divide
var m7 = Units.Seconds.of(10);
var m8 = Units.Amps.of(2);
result = m7.divide(m8);
assertEquals(result.magnitude(), 5);
assertEquals(result.unit(), Units.Seconds.per(Units.Amps));
// Same base unit divide
var m9 = Units.Meters.of(8);
var m10 = Units.Meters.of(4);
result = m9.divide(m10);
assertEquals(result.magnitude(), 2);
assertEquals(result.unit(), Units.Value);
}
@Test
void testToShortString() {
var measure = Units.Volts.of(343);