package units

import "testing"

func TestUSConverterTemperatureCToOutput(t *testing.T) {
	c := USConverter{}

	if got := c.TemperatureCToOutput(nil); got != nil {
		t.Fatalf("expected nil for nil input")
	}

	zeroC := 0.0
	got := c.TemperatureCToOutput(&zeroC)
	if got == nil || *got != 32.0 {
		t.Fatalf("expected 32.0F, got %v", got)
	}

	v := 20.56 // 69.008F -> 69.0 at precision 1
	got = c.TemperatureCToOutput(&v)
	if got == nil || *got != 69.0 {
		t.Fatalf("expected 69.0F, got %v", got)
	}
}

func TestUSConverterSpeedKmhToOutput(t *testing.T) {
	c := USConverter{}

	if got := c.SpeedKmhToOutput(nil); got != nil {
		t.Fatalf("expected nil for nil input")
	}

	v := 10.0 // 6.21371 mph -> 6.2 at precision 1
	got := c.SpeedKmhToOutput(&v)
	if got == nil || *got != 6.2 {
		t.Fatalf("expected 6.2 mph, got %v", got)
	}

	exact := 16.09344 // exact 10 mph
	got = c.SpeedKmhToOutput(&exact)
	if got == nil || *got != 10.0 {
		t.Fatalf("expected 10.0 mph, got %v", got)
	}
}