Merge pull request #25 from choria-io/24

(#24) handle 0 as a special case duration

Author: ripienaar

duration_test.go

@@ -20,6 +20,7 @@ func TestDurationParser(t *testing.T) {
 		{"1Y1M", (365 * 24 * time.Hour) + (24 * 30 * time.Hour), nil},
 		{"1xX", 0, fmt.Errorf("%w: invalid unit xX", errInvalidDuration)},
 		{"-1", 0, fmt.Errorf("invalid duration")},
+		{"0", 0, nil},
 	}
 
 	for _, c := range cases {

durations.go

@@ -30,6 +30,11 @@ var (
 //
 // Valid duration strings can be -1y1d1µs
 func ParseDuration(d string) (time.Duration, error) {
+	// golang time.ParseDuration has a special case for 0
+	if d == "0" {
+		return 0 * time.Second, nil
+	}
+
 	var (
 		r   time.Duration
 		neg = 1