package util

import "testing"

func TestSlugify(t *testing.T) {
	tests := []struct {
		name     string
		input    string
		expected string
	}{
		{"already a slug", "hello-world", "hello-world"},
		{"mixed case", "Hello World", "hello-world"},
		{"punctuation", "What's new?", "what-s-new"},
		{"run of separators", "one   ---   two", "one-two"},
		{"leading separators", "///one", "one"},
		{"trailing separators", "one///", "one"},
		{"separators at both ends", "  --one two--  ", "one-two"},
		{"digits are kept", "Go 1.14 release", "go-1-14-release"},
		{"underscores are separators", "some_name_here", "some-name-here"},
		{"nothing usable", "!!! ???", ""},
		{"empty string", "", ""},
		{"outside ascii", "Grüße, Welt", "gr-e-welt"},
		{"only characters outside ascii", "日本語", ""},
	}

	for _, test := range tests {
		t.Run(test.name, func(t *testing.T) {
			got := Slugify(test.input)
			if got != test.expected {
				t.Errorf("expected %q got %q", test.expected, got)
			}
		})
	}
}