package underscore_test import ( "testing" "github.com/stretchr/testify/assert" u "github.com/rjNemo/underscore" ) func TestFind(t *testing.T) { want := 5 nums := []int{2, 4, 5, 6, 8, 0} isOdd := func(n int) bool { return n%2 != 0 } got, err := u.Find(nums, isOdd) assert.Equal(t, want, got) assert.NoError(t, err) } func TestNotFound(t *testing.T) { nums := []int{2, 4, 6, 8, 0} isOdd := func(n int) bool { return n%2 != 0 } _, err := u.Find(nums, isOdd) assert.Error(t, err) }