package locale

import "testing"

func TestString (test *testing.T) {
	testCase := func (correct string, locale Locale) {
		got := locale.String()
		if got != correct {
			test.Fatalf("expected:\n\t%s\ngot:\n\t%s\n", correct, got)
		}
	}

	testCase("lang_COUNTRY.ENCODING@MODIFIER", Locale {
		Lang:     "lang",
		Country:  "COUNTRY",
		Encoding: "ENCODING",
		Modifier: "MODIFIER",
	})
	testCase("lang.ENCODING@MODIFIER", Locale {
		Lang:     "lang",
		Encoding: "ENCODING",
		Modifier: "MODIFIER",
	})
	testCase("lang_COUNTRY@MODIFIER", Locale {
		Lang:     "lang",
		Country:  "COUNTRY",
		Modifier: "MODIFIER",
	})
	testCase("lang_COUNTRY.ENCODING", Locale {
		Lang:     "lang",
		Country:  "COUNTRY",
		Encoding: "ENCODING",
	})
	testCase("lang_COUNTRY", Locale {
		Lang:     "lang",
		Country:  "COUNTRY",
	})
	testCase("lang.ENCODING", Locale {
		Lang:     "lang",
		Encoding: "ENCODING",
	})
	testCase("lang@MODIFIER", Locale {
		Lang:     "lang",
		Modifier: "MODIFIER",
	})
}

func TestParse (test *testing.T) {
	testCase := func (input string, correct Locale) {
		got, err := Parse(input)
		if err != nil {
			test.Fatal(err)
		}
		if got != correct {
			test.Fatalf("expected:\n\t%v\ngot:\n\t%v\n", correct, got)
		}
	}

	testCase("lang_COUNTRY.ENCODING@MODIFIER", Locale {
		Lang:     "lang",
		Country:  "COUNTRY",
		Encoding: "ENCODING",
		Modifier: "MODIFIER",
	})
	testCase("lang.ENCODING@MODIFIER", Locale {
		Lang:     "lang",
		Encoding: "ENCODING",
		Modifier: "MODIFIER",
	})
	testCase("lang_COUNTRY@MODIFIER", Locale {
		Lang:     "lang",
		Country:  "COUNTRY",
		Modifier: "MODIFIER",
	})
	testCase("lang_COUNTRY.ENCODING", Locale {
		Lang:     "lang",
		Country:  "COUNTRY",
		Encoding: "ENCODING",
	})
	testCase("lang_COUNTRY", Locale {
		Lang:     "lang",
		Country:  "COUNTRY",
	})
	testCase("lang.ENCODING", Locale {
		Lang:     "lang",
		Encoding: "ENCODING",
	})
	testCase("lang@MODIFIER", Locale {
		Lang:     "lang",
		Modifier: "MODIFIER",
	})
}

func TestParseErr (test *testing.T) {
	testCase := func (input string, correct error) {
		_, err := Parse(input)
		if err != correct {
			test.Fatalf("expected:\n\t%v\ngot:\n\t%v\n", correct, err)
		}
	}

	testCase("lang.ENCODING.MODIFIER", ErrUnexpectedRune)
	testCase("lang@COUNTRY.ENCODING", ErrUnexpectedRune)
	testCase("lang.@COUNTRY.ENCODING", ErrUnexpectedRune)
	testCase("_COUNTRY.ENCODING@MODIFIER", ErrLangEmpty)
}