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template: add some missing test cases for First

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This commit is contained in:
bep 2015-03-18 20:47:10 +01:00
parent b15d0a168f
commit a8bfaba081
2 changed files with 8 additions and 0 deletions
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5
tpl/template.go
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@ -289,6 +289,11 @@ func indirect(v reflect.Value) (rv reflect.Value, isNil bool) {
// First is exposed to templates, to iterate over the first N items in a // First is exposed to templates, to iterate over the first N items in a
// rangeable list. // rangeable list.
func First(limit interface{}, seq interface{}) (interface{}, error) { func First(limit interface{}, seq interface{}) (interface{}, error) {
if limit == nil || seq == nil {
return nil, errors.New("both limit and seq must be provided")
}
limitv, err := cast.ToIntE(limit) limitv, err := cast.ToIntE(limit)
if err != nil { if err != nil {

3
tpl/template_test.go
View file

@ -231,6 +231,9 @@ func TestFirst(t *testing.T) {
{"1", []int{100, 200, 300}, []int{100}}, {"1", []int{100, 200, 300}, []int{100}},
{int64(-1), []int{100, 200, 300}, false}, {int64(-1), []int{100, 200, 300}, false},
{"noint", []int{100, 200, 300}, false}, {"noint", []int{100, 200, 300}, false},
{1, nil, false},
{nil, []int{100}, false},
{1, t, false},
} { } {
results, err := First(this.count, this.sequence) results, err := First(this.count, this.sequence)
if b, ok := this.expect.(bool); ok && !b { if b, ok := this.expect.(bool); ok && !b {