Fix time.Duration parsing for int param (#678)

This fixes an issue where if the param of a time.Durtion type is specified
as an integer, denoting nanosecond precision, instead of time duration
string the validation would panic.

the fixes ensures it falls back to the previous expected behaviour.

README.md

@@ -1,7 +1,7 @@
 Package validator
 ================
 <img align="right" src="https://raw.githubusercontent.com/go-playground/validator/v9/logo.png">[![Join the chat at https://gitter.im/go-playground/validator](https://badges.gitter.im/Join%20Chat.svg)](https://gitter.im/go-playground/validator?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge&utm_content=badge)
-![Project status](https://img.shields.io/badge/version-10.3.0-green.svg)
+![Project status](https://img.shields.io/badge/version-10.4.1-green.svg)
 [![Build Status](https://travis-ci.org/go-playground/validator.svg?branch=master)](https://travis-ci.org/go-playground/validator)
 [![Coverage Status](https://coveralls.io/repos/go-playground/validator/badge.svg?branch=master&service=github)](https://coveralls.io/github/go-playground/validator?branch=master)
 [![Go Report Card](https://goreportcard.com/badge/github.com/go-playground/validator)](https://goreportcard.com/report/github.com/go-playground/validator)

baked_in.go

@@ -2250,11 +2250,7 @@ func isTimeZone(fl FieldLevel) bool {
 		}
 
 		_, err := time.LoadLocation(field.String())
-		if err != nil {
-			return false
-		}
-
-		return true
+		return err == nil
 	}
 
 	panic(fmt.Sprintf("Bad field type %T", field.Interface()))

util.go

@@ -223,7 +223,6 @@ BEGIN:
 // asInt returns the parameter as a int64
 // or panics if it can't convert
 func asInt(param string) int64 {
-
 	i, err := strconv.ParseInt(param, 0, 64)
 	panicIf(err)
 
@@ -234,8 +233,10 @@ func asInt(param string) int64 {
 // or panics on error.
 func asIntFromTimeDuration(param string) int64 {
 	d, err := time.ParseDuration(param)
-	panicIf(err)
-
+	if err != nil {
+		// attempt parsing as an an integer assuming nanosecond precision
+		return asInt(param)
+	}
 	return int64(d)
 }
 

validator_test.go

@@ -9475,7 +9475,7 @@ func TestUniqueValidationStructPtrSlice(t *testing.T) {
 			}
 		}
 	}
-	PanicMatches(t, func() { validate.Var(testStructs, "unique=C") }, "Bad field name C")
+	PanicMatches(t, func() { _ = validate.Var(testStructs, "unique=C") }, "Bad field name C")
 }
 
 func TestHTMLValidation(t *testing.T) {
@@ -10990,3 +10990,46 @@ func TestTimeZoneValidation(t *testing.T) {
 		_ = validate.Var(2, "timezone")
 	}, "Bad field type int")
 }
+
+func TestDurationType(t *testing.T) {
+	tests := []struct {
+		name    string
+		s       interface{} // struct
+		success bool
+	}{
+		{
+			name: "valid duration string pass",
+			s: struct {
+				Value time.Duration `validate:"gte=500ns"`
+			}{
+				Value: time.Second,
+			},
+			success: true,
+		},
+		{
+			name: "valid duration int pass",
+			s: struct {
+				Value time.Duration `validate:"gte=500"`
+			}{
+				Value: time.Second,
+			},
+			success: true,
+		},
+	}
+
+	validate := New()
+
+	for _, tc := range tests {
+		tc := tc
+		t.Run(tc.name, func(t *testing.T) {
+			t.Parallel()
+
+			errs := validate.Struct(tc.s)
+			if tc.success {
+				Equal(t, errs, nil)
+				return
+			}
+			NotEqual(t, errs, nil)
+		})
+	}
+}