func ExampleSplit60() {
neg, x60, seg, err := base.Split60(-123.456, 2, true)
if err != nil {
fmt.Println(err)
return
}
s := ""
if neg {
s = "-"
}
fmt.Printf("%s%02d° %s′\n", s, x60, seg)
// Output:
// -02° 03.46′
}
func TestSplit60(t *testing.T) {
for _, tc := range []struct {
x float64
prec int
neg bool
quo int64
rem string
err error
}{
// warm up
{75, 0, false, 1, "15", nil},
{75, 1, false, 1, "15.0", nil},
// smallest valid with prec = 15 is about 4.5 seconds.
{4.500000123456789, 15, false, 0, "4.500000123456789", nil},
{9, 16, false, 0, "9", base.WidthErrorInvalidPrecision},
{10, 15, false, 0, "10", base.WidthErrorLossOfPrecision},
// one degree can have 12 digits of precision without loss.
{3600, 12, false, 60, "0.000000000000", nil},
// 360 degrees (21600 minutes) can have 9.
{360 * 3600, 9, false, 21600, "0.000000000", nil},
} {
neg, quo, rem, err := base.Split60(tc.x, tc.prec, false)
if err != tc.err {
t.Logf("%#v", tc)
t.Fatal("err", err)
}
if err != nil {
continue
}
if neg != tc.neg {
t.Logf("%#v", tc)
t.Fatal("neg", neg)
}
if quo != tc.quo {
t.Logf("%#v", tc)
t.Fatal("quo", quo)
}
if rem != tc.rem {
t.Logf("%#v", tc)
t.Fatal("rem", rem)
}
}
}