@gmod/jbrowse/tests/js_tests/spec/NestedFrequencyTable.spec.js

JBrowse - client-side genome browser

require([
            'JBrowse/Model/NestedFrequencyTable'
        ], function( NestedFrequencyTable ) {
describe( 'nested frequency table', function() {
    it( 'works when empty', function() {
            var t = new NestedFrequencyTable();
            expect( t.total() ).toEqual(0);
            var fe = [];
            t.forEach(function(ct,name) { fe.push(ct); });
            expect( fe.length ).toEqual(0);

    });


    it( 'increments', function() {
            var t = new NestedFrequencyTable();
            t.increment('foobar');
            expect( t.get('foobar') ).toEqual(1);
            expect( t.get('rubber') ).toEqual(0);
            expect( t.total() ).toEqual(1);

            t.increment('noggin');
            expect( t.total() ).toEqual(2);
    });

    it( 'can nest', function() {
            var t = new NestedFrequencyTable();
            t.increment('foobar');
            expect( t.get('foobar') ).toEqual(1);

            t.getNested('foo/ziggy').increment();
            expect( t.total() ).toEqual(2);

            t.getNested('foo/noggin').increment();
            expect( t.total() ).toEqual(3);

            expect( t.get('foo').total() ).toEqual( 2 );
    });
});
});