const test = require('tape');

const defs = require('../src/defs.js');

const unicode_tests = [
    {
        description: "Convert normal ascii string",
        literal: "foo",
        byte_array: defs.luastring_of("f".charCodeAt(0), "o".charCodeAt(0), "o".charCodeAt(0))
    },
    {
        description: "Convert ascii string containing null byte",
        literal: "fo\0o",
        byte_array: defs.luastring_of("f".charCodeAt(0), "o".charCodeAt(0), 0, "o".charCodeAt(0))
    },
    {
        description: "Convert string with BMP unicode chars",
        literal: "Café",
        byte_array: defs.luastring_of(67, 97, 102, 195, 169)
    },
    {
        description: "Convert string with codepoint in PUA (U+E000 to U+F8FF)",
        literal: "",
        byte_array: defs.luastring_of(239, 163, 191)
    },
    {
        description: "Convert string with surrogate pair",
        literal: "❤️🍾",
        byte_array: defs.luastring_of(226, 157, 164, 239, 184, 143, 240, 159, 141, 190)
    },
    {
        description: "Convert string with broken surrogate pair",
        literal: "\uD800a",
        byte_array: defs.luastring_of(237, 160, 128, 97)
    },
    {
        description: "Convert string with broken surrogate pair at end of string",
        literal: "\uD823",
        byte_array: defs.luastring_of(237, 160, 163)
    }
];

test('to_luastring', function (t) {
    t.plan(unicode_tests.length);

    unicode_tests.forEach(function(v) {
        t.deepEqual(defs.to_luastring(v.literal), v.byte_array, v.description);
    });
});

test('to_jsstring', function (t) {
    t.plan(unicode_tests.length);

    unicode_tests.forEach(function(v) {
        t.deepEqual(defs.to_jsstring(v.byte_array), v.literal, v.description);
    });
});

test('to_jsstring fails on invalid unicode', function (t) {
    t.plan(7);

    t.throws(function() {
        defs.to_jsstring([165]);
    }, "non-utf8 char");

    t.throws(function() {
        defs.to_jsstring([208, 60]);
    }, "invalid continuation byte");

    t.throws(function() {
        defs.to_jsstring([225, 60, 145]);
    }, "invalid continuation byte");

    t.throws(function() {
        defs.to_jsstring([225, 145, 60]);
    }, "invalid continuation byte");

    t.throws(function() {
        defs.to_jsstring([242, 60, 145, 145]);
    }, "invalid continuation byte");

    t.throws(function() {
        defs.to_jsstring([242, 145, 60, 145]);
    }, "invalid continuation byte");

    t.throws(function() {
        defs.to_jsstring([242, 145, 145, 60]);
    }, "invalid continuation byte");
});