line_highlighter_spec.js

/* eslint-disable space-before-function-paren, no-var, no-param-reassign, quotes, prefer-template, no-else-return, new-cap, dot-notation, no-return-assign, comma-dangle, no-new, one-var, one-var-declaration-per-line, jasmine/no-spec-dupes, no-underscore-dangle, max-len */
/* global LineHighlighter */

require('~/line_highlighter');

(function() {
  describe('LineHighlighter', function() {
    var clickLine;
    preloadFixtures('static/line_highlighter.html.raw');
    clickLine = function(number, eventData) {
      var e;
      if (eventData == null) {
        eventData = {};
      }
      if ($.isEmptyObject(eventData)) {
        return $("#L" + number).mousedown().click();
      } else {
        e = $.Event('mousedown', eventData);
        return $("#L" + number).trigger(e).click();
      }
    };
    beforeEach(function() {
      loadFixtures('static/line_highlighter.html.raw');
      this["class"] = new LineHighlighter();
      this.css = this["class"].highlightClass;
      return this.spies = {
        __setLocationHash__: spyOn(this["class"], '__setLocationHash__').and.callFake(function() {})
      };
    });
    describe('behavior', function() {
      it('highlights one line given in the URL hash', function() {
        new LineHighlighter('#L13');
        return expect($('#LC13')).toHaveClass(this.css);
      });
      it('highlights a range of lines given in the URL hash', function() {
        var line, results;
        new LineHighlighter('#L5-25');
        expect($("." + this.css).length).toBe(21);
        results = [];
        for (line = 5; line <= 25; line += 1) {
          results.push(expect($("#LC" + line)).toHaveClass(this.css));
        }
        return results;
      });
      it('scrolls to the first highlighted line on initial load', function() {
        var spy;
        spy = spyOn($, 'scrollTo');
        new LineHighlighter('#L5-25');
        return expect(spy).toHaveBeenCalledWith('#L5', jasmine.anything());
      });
      it('discards click events', function() {
        var spy;
        spy = spyOnEvent('a[data-line-number]', 'click');
        clickLine(13);
        return expect(spy).toHaveBeenPrevented();
      });
      return it('handles garbage input from the hash', function() {
        var func;
        func = function() {
          return new LineHighlighter('#blob-content-holder');
        };
        return expect(func).not.toThrow();
      });
    });
    describe('#clickHandler', function() {
      it('discards the mousedown event', function() {
        var spy;
        spy = spyOnEvent('a[data-line-number]', 'mousedown');
        clickLine(13);
        return expect(spy).toHaveBeenPrevented();
      });
      it('handles clicking on a child icon element', function() {
        var spy;
        spy = spyOn(this["class"], 'setHash').and.callThrough();
        $('#L13 i').mousedown().click();
        expect(spy).toHaveBeenCalledWith(13);
        return expect($('#LC13')).toHaveClass(this.css);
      });
      describe('without shiftKey', function() {
        it('highlights one line when clicked', function() {
          clickLine(13);
          return expect($('#LC13')).toHaveClass(this.css);
        });
        it('unhighlights previously highlighted lines', function() {
          clickLine(13);
          clickLine(20);
          expect($('#LC13')).not.toHaveClass(this.css);
          return expect($('#LC20')).toHaveClass(this.css);
        });
        return it('sets the hash', function() {
          var spy;
          spy = spyOn(this["class"], 'setHash').and.callThrough();
          clickLine(13);
          return expect(spy).toHaveBeenCalledWith(13);
        });
      });
      return describe('with shiftKey', function() {
        it('sets the hash', function() {
          var spy;
          spy = spyOn(this["class"], 'setHash').and.callThrough();
          clickLine(13);
          clickLine(20, {
            shiftKey: true
          });
          expect(spy).toHaveBeenCalledWith(13);
          return expect(spy).toHaveBeenCalledWith(13, 20);
        });
        describe('without existing highlight', function() {
          it('highlights the clicked line', function() {
            clickLine(13, {
              shiftKey: true
            });
            expect($('#LC13')).toHaveClass(this.css);
            return expect($("." + this.css).length).toBe(1);
          });
          return it('sets the hash', function() {
            var spy;
            spy = spyOn(this["class"], 'setHash');
            clickLine(13, {
              shiftKey: true
            });
            return expect(spy).toHaveBeenCalledWith(13);
          });
        });
        describe('with existing single-line highlight', function() {
          it('uses existing line as last line when target is lesser', function() {
            var line, results;
            clickLine(20);
            clickLine(15, {
              shiftKey: true
            });
            expect($("." + this.css).length).toBe(6);
            results = [];
            for (line = 15; line <= 20; line += 1) {
              results.push(expect($("#LC" + line)).toHaveClass(this.css));
            }
            return results;
          });
          return it('uses existing line as first line when target is greater', function() {
            var line, results;
            clickLine(5);
            clickLine(10, {
              shiftKey: true
            });
            expect($("." + this.css).length).toBe(6);
            results = [];
            for (line = 5; line <= 10; line += 1) {
              results.push(expect($("#LC" + line)).toHaveClass(this.css));
            }
            return results;
          });
        });
        return describe('with existing multi-line highlight', function() {
          beforeEach(function() {
            clickLine(10, {
              shiftKey: true
            });
            return clickLine(13, {
              shiftKey: true
            });
          });
          it('uses target as first line when it is less than existing first line', function() {
            var line, results;
            clickLine(5, {
              shiftKey: true
            });
            expect($("." + this.css).length).toBe(6);
            results = [];
            for (line = 5; line <= 10; line += 1) {
              results.push(expect($("#LC" + line)).toHaveClass(this.css));
            }
            return results;
          });
          return it('uses target as last line when it is greater than existing first line', function() {
            var line, results;
            clickLine(15, {
              shiftKey: true
            });
            expect($("." + this.css).length).toBe(6);
            results = [];
            for (line = 10; line <= 15; line += 1) {
              results.push(expect($("#LC" + line)).toHaveClass(this.css));
            }
            return results;
          });
        });
      });
    });
    describe('#hashToRange', function() {
      beforeEach(function() {
        return this.subject = this["class"].hashToRange;
      });
      it('extracts a single line number from the hash', function() {
        return expect(this.subject('#L5')).toEqual([5, null]);
      });
      it('extracts a range of line numbers from the hash', function() {
        return expect(this.subject('#L5-15')).toEqual([5, 15]);
      });
      return it('returns [null, null] when the hash is not a line number', function() {
        return expect(this.subject('#foo')).toEqual([null, null]);
      });
    });
    describe('#highlightLine', function() {
      beforeEach(function() {
        return this.subject = this["class"].highlightLine;
      });
      it('highlights the specified line', function() {
        this.subject(13);
        return expect($('#LC13')).toHaveClass(this.css);
      });
      return it('accepts a String-based number', function() {
        this.subject('13');
        return expect($('#LC13')).toHaveClass(this.css);
      });
    });
    return describe('#setHash', function() {
      beforeEach(function() {
        return this.subject = this["class"].setHash;
      });
      it('sets the location hash for a single line', function() {
        this.subject(5);
        return expect(this.spies.__setLocationHash__).toHaveBeenCalledWith('#L5');
      });
      return it('sets the location hash for a range', function() {
        this.subject(5, 15);
        return expect(this.spies.__setLocationHash__).toHaveBeenCalledWith('#L5-15');
      });
    });
  });
}).call(window);