Add ToDurationSlice()

This commit is contained in:
Roman Volosatovs 2017-04-13 10:50:28 +02:00 committed by Bjørn Erik Pedersen
parent ce135a4ebe
commit acbeb36b90
3 changed files with 67 additions and 0 deletions

View File

@ -151,3 +151,9 @@ func ToIntSlice(i interface{}) []int {
v, _ := ToIntSliceE(i) v, _ := ToIntSliceE(i)
return v return v
} }
// ToDurationSlice casts an interface to a []time.Duration type.
func ToDurationSlice(i interface{}) []time.Duration {
v, _ := ToDurationSliceE(i)
return v
}

View File

@ -975,6 +975,38 @@ func TestToStringSliceE(t *testing.T) {
} }
} }
func TestToDurationSliceE(t *testing.T) {
tests := []struct {
input interface{}
expect []time.Duration
iserr bool
}{
{[]string{"1s", "1m"}, []time.Duration{time.Second, time.Minute}, false},
{[]int{1, 2}, []time.Duration{1, 2}, false},
{[]interface{}{1, 3}, []time.Duration{1, 3}, false},
// errors
{nil, nil, true},
{testing.T{}, nil, true},
}
for i, test := range tests {
errmsg := fmt.Sprintf("i = %d", i) // assert helper message
v, err := ToDurationSliceE(test.input)
if test.iserr {
assert.Error(t, err, errmsg)
continue
}
assert.NoError(t, err, errmsg)
assert.Equal(t, test.expect, v, errmsg)
// Non-E test
v = ToDurationSlice(test.input)
assert.Equal(t, test.expect, v, errmsg)
}
}
func TestToBoolE(t *testing.T) { func TestToBoolE(t *testing.T) {
tests := []struct { tests := []struct {
input interface{} input interface{}

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@ -1077,6 +1077,35 @@ func ToIntSliceE(i interface{}) ([]int, error) {
} }
} }
// ToDurationSliceE casts an interface to a []time.Duration type.
func ToDurationSliceE(i interface{}) ([]time.Duration, error) {
if i == nil {
return []time.Duration{}, fmt.Errorf("unable to cast %#v of type %T to []time.Duration", i, i)
}
switch v := i.(type) {
case []time.Duration:
return v, nil
}
kind := reflect.TypeOf(i).Kind()
switch kind {
case reflect.Slice, reflect.Array:
s := reflect.ValueOf(i)
a := make([]time.Duration, s.Len())
for j := 0; j < s.Len(); j++ {
val, err := ToDurationE(s.Index(j).Interface())
if err != nil {
return []time.Duration{}, fmt.Errorf("unable to cast %#v of type %T to []time.Duration", i, i)
}
a[j] = val
}
return a, nil
default:
return []time.Duration{}, fmt.Errorf("unable to cast %#v of type %T to []time.Duration", i, i)
}
}
// StringToDate attempts to parse a string into a time.Time type using a // StringToDate attempts to parse a string into a time.Time type using a
// predefined list of formats. If no suitable format is found, an error is // predefined list of formats. If no suitable format is found, an error is
// returned. // returned.