@domdomegg/masala-parser/build/test/genlex/genlex-brainfuck-test.js

Masala Parser

'use strict';

Object.defineProperty(exports, "__esModule", {
    value: true
});

var _genlex = require('../../lib/genlex/genlex');

var _index = require('../../lib/parsec/index');

var _stream = require('../../lib/stream');

var _stream2 = _interopRequireDefault(_stream);

function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

function createParser() {

    var genlex = new _genlex.GenLex();
    genlex.setSeparatorsParser(_index.F.not(_index.C.charIn('+-<>[],.')));
    genlex.keywords(['+', '-', '<', '>', '[', ']', ',', '.']);
    var grammar = _index.F.any().map(function (token) {
        return token.value;
    }).rep();

    return genlex.use(grammar);
}

exports.default = {
    setUp: function setUp(done) {
        done();
    },

    'parser is valid': function parserIsValid(test) {

        var hW = '++++++++[>++++[>++>+++>+++>+<<<<-]>+>+>->>+[<]<-]>>.>---.+++++++..+++.>>.<-.<.+++.------.--------.>>+.>++.';

        var parser = createParser();
        var response = parser.parse(_stream2.default.ofString(hW));

        test.ok(response.isAccepted());
        test.equals(response.offset, hW.length);

        test.done();
    },

    'comments are accepted': function commentsAreAccepted(test) {

        // Taken from Wikipedia documentation
        var hW = '++++++++               Set Cell #0 to 8\n[\n    >++++               Add 4 to Cell #1; this will always set Cell #1 to 4\n    [                   as the cell will be cleared by the loop\n        >++             Add 2 to Cell #2\n        >+++            Add 3 to Cell #3\n        >+++            Add 3 to Cell #4\n        >+              Add 1 to Cell #5\n        <<<<-           Decrement the loop counter in Cell #1\n    ]                   Loop till Cell #1 is zero; number of iterations is 4\n    >+                  Add 1 to Cell #2\n    >+                  Add 1 to Cell #3\n    >-                  Subtract 1 from Cell #4\n    >>+                 Add 1 to Cell #6\n    [<]                 Move back to the first zero cell you find; this will\n                        be Cell #1 which was cleared by the previous loop\n    <-                  Decrement the loop Counter in Cell #0\n]                       Loop till Cell #0 is zero; number of iterations is 8\n\nThe result of this is:\nCell No :   0   1   2   3   4   5   6\nContents:   0   0  72 104  88  32   8\nPointer :   ^\n\n>>.                     Cell #2 has value 72 which is \'H\'\n>---.                   Subtract 3 from Cell #3 to get 101 which is \'e\'\n+++++++..+++.           Likewise for \'llo\' from Cell #3\n>>.                     Cell #5 is 32 for the space\n<-.                     Subtract 1 from Cell #4 for 87 to give a \'W\'\n<.                      Cell #3 was set to \'o\' from the end of \'Hello\'\n+++.------.--------.    Cell #3 for \'rl\' and \'d\'\n>>+.                    Add 1 to Cell #5 gives us an exclamation point\n>++.                    And finally a newline from Cell #6';

        var parser = createParser();
        var response = parser.parse(_stream2.default.ofString(hW));

        test.ok(response.isAccepted());
        test.equals(response.offset, 106); // there is 111 tokens


        test.done();
    }

};
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