mediawiki-extensions-Revisi.../tests/qunit/RevisionSlider.Slider.test.js

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( function ( mw ) {
var Slider = mw.libs.revisionSlider.Slider,
RevisionList = mw.libs.revisionSlider.RevisionList,
Revision = mw.libs.revisionSlider.Revision,
makeNRevisions = function ( n ) {
var revs = [],
i;
for ( i = 0; i < n; i++ ) {
revs.push( new Revision( { revid: i + 1, user: 'Fooo' } ) );
}
return new RevisionList( revs );
};
QUnit.module( 'ext.RevisionSlider.Slider' );
QUnit.test( 'has revisions', function ( assert ) {
var revs = new RevisionList( [
new Revision( { revid: 1 } ),
new Revision( { revid: 2 } )
] ),
slider = new Slider( revs );
assert.equal( slider.getRevisionList(), revs );
} );
QUnit.test( 'Given no revisions, first visible revision index is 0', function ( assert ) {
var slider = new Slider( makeNRevisions( 0 ) );
assert.equal( slider.getOldestVisibleRevisionIndex(), 0 );
} );
QUnit.test( 'Given 200 revisions sliding once increases oldestVisibleRevisionIndex by the number of revisions per window', function ( assert ) {
var slider = new Slider( makeNRevisions( 200 ) );
slider.setRevisionsPerWindow( 50 );
slider.slide( 1 );
assert.equal( slider.getOldestVisibleRevisionIndex(), 50 );
} );
QUnit.test( 'oldestVisibleRevisionIndex cannot be higher than revisions.length - revisionsPerWindow', function ( assert ) {
var slider = new Slider( makeNRevisions( 75 ) );
slider.setRevisionsPerWindow( 50 );
slider.slide( 1 );
assert.equal( slider.getOldestVisibleRevisionIndex(), 25 );
} );
QUnit.test( 'oldestVisibleRevisionIndex cannot be lower than 0', function ( assert ) {
var slider = new Slider( makeNRevisions( 50 ) );
slider.oldestVisibleRevisionIndex = 10;
slider.setRevisionsPerWindow( 20 );
slider.slide( -1 );
assert.equal( slider.getOldestVisibleRevisionIndex(), 0 );
} );
}( mediaWiki ) );