66 lines
1.3 KiB
Go
66 lines
1.3 KiB
Go
package clockface
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import (
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"math"
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"testing"
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"time"
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)
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func TestSecondsInRadians(t *testing.T) {
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cases := []struct {
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time time.Time
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angle float64
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}{
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{simpleTime(0, 0, 30), math.Pi},
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{simpleTime(0, 0, 0), 0},
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{simpleTime(0, 0, 45), (math.Pi / 2) * 3},
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{simpleTime(0, 0, 7), (math.Pi / 30) * 7},
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}
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for _, c := range cases {
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t.Run(testName(c.time), func(t *testing.T) {
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got := secondsInRadians(c.time)
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if c.angle != got {
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t.Fatalf("Wanted %v radians, but got %v", c.angle, got)
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}
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})
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}
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}
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func TestSecondHandPoint(t *testing.T) {
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cases := []struct {
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time time.Time
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point Point
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}{
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{simpleTime(0, 0, 30), Point{0, -1}},
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{simpleTime(0, 0, 45), Point{-1, 0}},
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}
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for _, c := range cases {
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t.Run(testName(c.time), func(t *testing.T) {
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got := secondHandPoint(c.time)
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if !roughlyEqualPoint(got, c.point) {
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t.Fatalf("Wanted %v Point, but got %v", c.point, got)
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}
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})
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}
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}
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func simpleTime(hours, minutes, seconds int) time.Time {
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return time.Date(321, time.October, 28, hours, minutes, seconds, 0, time.UTC)
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}
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func testName(t time.Time) string {
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return t.Format("15:04:05")
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}
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func roughlyEqualFloat64(a, b float64) bool {
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const equalityThreshold = 1e-7
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return math.Abs(a-b) < equalityThreshold
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}
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func roughlyEqualPoint(a, b Point) bool {
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return roughlyEqualFloat64(a.X, b.X) && roughlyEqualFloat64(a.Y, b.Y)
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}
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