var assert = require("assert");
var UglifyJS = require("../node");

describe("String literals", function() {
    it("Should throw syntax error if a string literal contains a newline", function() {
        var inputs = [
            "'\n'",
            "'\r'",
            '"\r\n"',
            "'\u2028'",
            '"\u2029"'
        ];

        var test = function(input) {
            return function() {
                var ast = UglifyJS.parse(input);
            };
        };

        var error = function(e) {
            return e instanceof UglifyJS.JS_Parse_Error
                && e.message === "Unterminated string constant";
        };

        for (var input in inputs) {
            assert.throws(test(inputs[input]), error);
        }
    });

    it("Should not throw syntax error if a string has a line continuation", function() {
        var output = UglifyJS.parse('var a = "a\\\nb";').print_to_string();
        assert.equal(output, 'var a="ab";');
    });

    it("Should throw error in strict mode if string contains escaped octalIntegerLiteral", function() {
        var inputs = [
            '"use strict";\n"\\76";',
            '"use strict";\nvar foo = "\\76";',
            '"use strict";\n"\\1";',
            '"use strict";\n"\\07";',
            '"use strict";\n"\\011"'
        ];

        var test = function(input) {
            return function() {
                var output = UglifyJS.parse(input);
            }
        };

        var error = function(e) {
            return e instanceof UglifyJS.JS_Parse_Error
                && e.message === "Legacy octal escape sequences are not allowed in strict mode";
        }

        for (var input in inputs) {
            assert.throws(test(inputs[input]), error);
        }
    });

    it("Should not throw error outside strict mode if string contains escaped octalIntegerLiteral", function() {
        var tests = [
            [ ';"\\76";', ';">";' ],
            [ ';"\\0";', ';"\\0";' ],
            [ ';"\\08"', ';"\\x008";' ],
            [ ';"\\008"', ';"\\x008";' ],
            [ ';"\\0008"', ';"\\x008";' ],
            [ ';"use\\\n strict";\n"\\07";', ';"use strict";"\07";' ],
            [ '"use strict" === "use strict";\n"\\76";', '"use strict"==="use strict";">";' ],
        ];

        for (var test in tests) {
            var output = UglifyJS.parse(tests[test][0]).print_to_string();
            assert.equal(output, tests[test][1]);
        }
    });

    it("Should not throw error when digit is 8 or 9", function() {
        assert.equal(UglifyJS.parse('"use strict";;"\\08"').print_to_string(), '"use strict";;"\\x008";');
        assert.equal(UglifyJS.parse('"use strict";;"\\09"').print_to_string(), '"use strict";;"\\x009";');
    });

    it("Should not unescape unpaired surrogates", function() {
        var code = [];
        for (var i = 0; i <= 0xF; i++) {
            code.push("\\u000" + i.toString(16));
        }
        for (;i <= 0xFF; i++) {
            code.push("\\u00" + i.toString(16));
        }
        for (;i <= 0xFFF; i++) {
            code.push("\\u0" + i.toString(16));
        }
        for (; i <= 0xFFFF; i++) {
            code.push("\\u" + i.toString(16));
        }
        code = ';"' + code.join() + '"';
        var normal = UglifyJS.minify(code, {
            compress: false,
            mangle: false,
            output: {
                ascii_only: false
            }
        });
        if (normal.error) throw normal.error;
        assert.ok(code.length > normal.code.length);
        assert.strictEqual(eval(code), eval(normal.code));
        var ascii = UglifyJS.minify(code, {
            compress: false,
            mangle: false,
            output: {
                ascii_only: false
            }
        });
        if (ascii.error) throw ascii.error;
        assert.ok(code.length > ascii.code.length);
        assert.strictEqual(eval(code), eval(ascii.code));
    });
});