overleaf/services/web/public/js/ace/token_iterator_test.js

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 if (typeof process !== "undefined") {
     require("amd-loader");
 }

define(function(require, exports, module) {
"use strict";

var EditSession = require("./edit_session").EditSession;
var JavaScriptMode = require("./mode/javascript").Mode;
var TokenIterator = require("./token_iterator").TokenIterator;
var assert = require("./test/assertions");

module.exports = {
    "test: token iterator initialization in JavaScript document" : function() {
        var lines = [
            "function foo(items) {",
            "    for (var i=0; i<items.length; i++) {",
            "        alert(items[i] + \"juhu\");",
            "    } // Real Tab.",
            "}"
        ];
        var session = new EditSession(lines.join("\n"), new JavaScriptMode());

        var iterator = new TokenIterator(session, 0, 0);
        assert.equal(iterator.getCurrentToken().value, "function");
        assert.equal(iterator.getCurrentTokenRow(), 0);
        assert.equal(iterator.getCurrentTokenColumn(), 0);

        iterator.stepForward();
        assert.equal(iterator.getCurrentToken().value, " ");
        assert.equal(iterator.getCurrentTokenRow(), 0);
        assert.equal(iterator.getCurrentTokenColumn(), 8);

        var iterator = new TokenIterator(session, 0, 4);
        assert.equal(iterator.getCurrentToken().value, "function");
        assert.equal(iterator.getCurrentTokenRow(), 0);
        assert.equal(iterator.getCurrentTokenColumn(), 0);

        iterator.stepForward();
        assert.equal(iterator.getCurrentToken().value, " ");
        assert.equal(iterator.getCurrentTokenRow(), 0);
        assert.equal(iterator.getCurrentTokenColumn(), 8);

        var iterator = new TokenIterator(session, 2, 18);
        assert.equal(iterator.getCurrentToken().value, "items");
        assert.equal(iterator.getCurrentTokenRow(), 2);
        assert.equal(iterator.getCurrentTokenColumn(), 14);

        iterator.stepForward();
        assert.equal(iterator.getCurrentToken().value, "[");
        assert.equal(iterator.getCurrentTokenRow(), 2);
        assert.equal(iterator.getCurrentTokenColumn(), 19);

        var iterator = new TokenIterator(session, 4, 0);
        assert.equal(iterator.getCurrentToken().value, "}");
        assert.equal(iterator.getCurrentTokenRow(), 4);
        assert.equal(iterator.getCurrentTokenColumn(), 0);

        iterator.stepBackward();
        assert.equal(iterator.getCurrentToken().value, "// Real Tab.");
        assert.equal(iterator.getCurrentTokenRow(), 3);
        assert.equal(iterator.getCurrentTokenColumn(), 6);

        var iterator = new TokenIterator(session, 5, 0);
        assert.equal(iterator.getCurrentToken(), null);
    },

    "test: token iterator initialization in text document" : function() {
        var lines = [
            "Lorem ipsum dolor sit amet, consectetur adipisicing elit,",
            "sed do eiusmod tempor incididunt ut labore et dolore magna",
            "aliqua. Ut enim ad minim veniam, quis nostrud exercitation",
            "ullamco laboris nisi ut aliquip ex ea commodo consequat."
        ];
        var session = new EditSession(lines.join("\n"));

        var iterator = new TokenIterator(session, 0, 0);
        assert.equal(iterator.getCurrentToken().value, lines[0]);
        assert.equal(iterator.getCurrentTokenRow(), 0);
        assert.equal(iterator.getCurrentTokenColumn(), 0);

        var iterator = new TokenIterator(session, 0, 4);
        assert.equal(iterator.getCurrentToken().value, lines[0]);
        assert.equal(iterator.getCurrentTokenRow(), 0);
        assert.equal(iterator.getCurrentTokenColumn(), 0);

        var iterator = new TokenIterator(session, 2, 18);
        assert.equal(iterator.getCurrentToken().value, lines[2]);
        assert.equal(iterator.getCurrentTokenRow(), 2);
        assert.equal(iterator.getCurrentTokenColumn(), 0);

        var iterator = new TokenIterator(session, 3, lines[3].length-1);
        assert.equal(iterator.getCurrentToken().value, lines[3]);
        assert.equal(iterator.getCurrentTokenRow(), 3);
        assert.equal(iterator.getCurrentTokenColumn(), 0);

        var iterator = new TokenIterator(session, 4, 0);
        assert.equal(iterator.getCurrentToken(), null);
    },

    "test: token iterator step forward in JavaScript document" : function() {
        var lines = [
            "function foo(items) {",
            "    for (var i=0; i<items.length; i++) {",
            "        alert(items[i] + \"juhu\");",
            "    } // Real Tab.",
            "}"
        ];
        var session = new EditSession(lines.join("\n"), new JavaScriptMode());

        var tokens = [];
        var len = session.getLength();
        for (var i = 0; i < len; i++)
            tokens = tokens.concat(session.getTokens(i));

        var iterator = new TokenIterator(session, 0, 0);
        for (var i = 1; i < tokens.length; i++)
            assert.equal(iterator.stepForward(), tokens[i]);
        assert.equal(iterator.stepForward(), null);
        assert.equal(iterator.getCurrentToken(), null);
    },

    "test: token iterator step backward in JavaScript document" : function() {
        var lines = [
            "function foo(items) {",
            "     for (var i=0; i<items.length; i++) {",
            "         alert(items[i] + \"juhu\");",
            "     } // Real Tab.",
            "}"
        ];
        var session = new EditSession(lines.join("\n"), new JavaScriptMode());

        var tokens = [];
        var len = session.getLength();
        for (var i = 0; i < len; i++)
            tokens = tokens.concat(session.getTokens(i));

        var iterator = new TokenIterator(session, 4, 0);
        for (var i = tokens.length-2; i >= 0; i--)
            assert.equal(iterator.stepBackward(), tokens[i]);
        assert.equal(iterator.stepBackward(), null);
        assert.equal(iterator.getCurrentToken(), null);
    },

    "test: token iterator reports correct row and column" : function() {
        var lines = [
            "function foo(items) {",
            "    for (var i=0; i<items.length; i++) {",
            "        alert(items[i] + \"juhu\");",
            "    } // Real Tab.",
            "}"
        ];
        var session = new EditSession(lines.join("\n"), new JavaScriptMode());

        var iterator = new TokenIterator(session, 0, 0);

        iterator.stepForward();
        iterator.stepForward();

        assert.equal(iterator.getCurrentToken().value, "foo");
        assert.equal(iterator.getCurrentTokenRow(), 0);
        assert.equal(iterator.getCurrentTokenColumn(), 9);

        iterator.stepForward();
        iterator.stepForward();
        iterator.stepForward();
        iterator.stepForward();
        iterator.stepForward();
        iterator.stepForward();
        iterator.stepForward();

        assert.equal(iterator.getCurrentToken().value, "for");
        assert.equal(iterator.getCurrentTokenRow(), 1);
        assert.equal(iterator.getCurrentTokenColumn(), 4);
    }
};

});

if (typeof module !== "undefined" && module === require.main) {
    require("asyncjs").test.testcase(module.exports).exec()
}