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package coll
import (
"testing"
"github.com/stretchr/testify/assert"
)
func TestIndex(t *testing.T) {
out, err := Index(map[string]interface{}{
"foo": "bar", "baz": "qux",
}, "foo")
assert.NoError(t, err)
assert.Equal(t, "bar", out)
out, err = Index(map[string]interface{}{
"foo": "bar", "baz": "qux", "quux": "corge",
}, "foo", 2)
assert.NoError(t, err)
assert.Equal(t, byte('r'), out)
out, err = Index([]interface{}{"foo", "bar", "baz"}, 2)
assert.NoError(t, err)
assert.Equal(t, "baz", out)
out, err = Index([]interface{}{"foo", "bar", "baz"}, 2, 2)
assert.NoError(t, err)
assert.Equal(t, byte('z'), out)
// error cases
out, err = Index([]interface{}{"foo", "bar", "baz"}, 0, 1, 2)
assert.Error(t, err)
assert.Nil(t, out)
out, err = Index(nil, 0)
assert.Error(t, err)
assert.Nil(t, out)
out, err = Index("foo", nil)
assert.Error(t, err)
assert.Nil(t, out)
out, err = Index(map[interface{}]string{nil: "foo", 2: "bar"}, "baz")
assert.Error(t, err)
assert.Nil(t, out)
out, err = Index([]int{}, 0)
assert.Error(t, err)
assert.Nil(t, out)
}
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