odoo.define('web.graph_tests', function (require) {
"use strict";

var concurrency = require('web.concurrency');
var GraphView = require('web.GraphView');
var testUtils = require('web.test_utils');

var createView = testUtils.createView;

QUnit.module('Views', {
    beforeEach: function () {
        this.data = {
            foo: {
                fields: {
                    foo: {string: "Foo", type: "integer", store: true},
                    bar: {string: "bar", type: "boolean"},
                    product_id: {string: "Product", type: "many2one", relation: 'product', store: true},
                    color_id: {string: "Color", type: "many2one", relation: 'color'},
                    date: {string: "Date", type: 'date'},
                },
                records: [
                    {id: 1, foo: 3, bar: true, product_id: 37, date: "2016-01-01"},
                    {id: 2, foo: 53, bar: true, product_id: 37, color_id: 7, date: "2016-01-03"},
                    {id: 3, foo: 2, bar: true, product_id: 37, date: "2016-03-04"},
                    {id: 4, foo: 24, bar: false, product_id: 37, date: "2016-03-07"},
                    {id: 5, foo: 4, bar: false, product_id: 41, date: "2016-05-01"},
                    {id: 6, foo: 63, bar: false, product_id: 41},
                    {id: 7, foo: 42, bar: false, product_id: 41},
                    {id: 8, foo: 48, bar: false, product_id: 41, date: "2016-04-01"},
                ]
            },
            product: {
                fields: {
                    name: {string: "Product Name", type: "char"}
                },
                records: [{
                    id: 37,
                    display_name: "xphone",
                }, {
                    id: 41,
                    display_name: "xpad",
                }]
            },
            color: {
                fields: {
                    name: {string: "Color", type: "char"}
                },
                records: [{
                    id: 7,
                    display_name: "red",
                }, {
                    id: 14,
                    display_name: "black",
                }]
            },
        };
    }
}, function () {

    QUnit.module('GraphView');

    QUnit.test('simple graph rendering', function (assert) {
        assert.expect(4);

        var graph = createView({
            View: GraphView,
            model: "foo",
            data: this.data,
            arch: '<graph string="Partners">' +
                        '<field name="bar"/>' +
                '</graph>',
        });

        var done = assert.async();
        return concurrency.delay(0).then(function () {
            assert.containsOnce(graph, 'div.o_graph_svg_container svg.nvd3-svg',
                        "should contain a div with a svg element");

            assert.strictEqual(graph.renderer.state.mode, "bar",
                "should be in bar chart mode by default");

            // here, we would like to test the svg in the dom.  However, it is
            // not so easy, because there is an animation which means that we
            // don't really have a nice way to find the proper rect elements.
            // So, instead we will do some white box testing.
            assert.strictEqual(graph.model.chart.data[0].value, 3,
                "should have first datapoint with value 3");
            assert.strictEqual(graph.model.chart.data[1].value, 5,
                "should have first datapoint with value 5");
            graph.destroy();
            done();
        });
    });

    QUnit.test('default type attribute', function (assert) {
        assert.expect(1);

        var graph = createView({
            View: GraphView,
            model: "foo",
            data: this.data,
            arch: '<graph string="Partners" type="pie">' +
                        '<field name="bar"/>' +
                '</graph>',
        });
        assert.strictEqual(graph.renderer.state.mode, "pie", "should be in pie chart mode by default");
        graph.destroy();
    });

    QUnit.test('title attribute', function (assert) {
        assert.expect(1);

        var graph = createView({
            View: GraphView,
            model: "foo",
            data: this.data,
            arch: '<graph title="Partners" type="pie">' +
                        '<field name="bar"/>' +
                '</graph>',
        });
        assert.strictEqual(graph.$('.o_graph_renderer label').text(), "Partners",
            "should have 'Partners as title'");
        graph.destroy();
    });

    QUnit.test('switching mode', function (assert) {
        assert.expect(6);

        var graph = createView({
            View: GraphView,
            model: "foo",
            data: this.data,
            arch: '<graph string="Partners" type="line">' +
                        '<field name="bar"/>' +
                '</graph>',
        });
        assert.strictEqual(graph.renderer.state.mode, "line", "should be in line chart mode by default");
        assert.doesNotHaveClass(graph.$buttons.find('button[data-mode="bar"]'), 'active',
            'bar type button should not be active');
        assert.hasClass(graph.$buttons.find('button[data-mode="line"]'),'active',
            'line type button should be active');
        testUtils.dom.click(graph.$buttons.find('button[data-mode="bar"]'));
        assert.strictEqual(graph.renderer.state.mode, "bar", "should be in bar chart mode by default");
        assert.doesNotHaveClass(graph.$buttons.find('button[data-mode="line"]'), 'active',
            'line type button should not be active');
        assert.hasClass(graph.$buttons.find('button[data-mode="bar"]'),'active',
            'bar type button should be active');
        graph.destroy();
    });

    QUnit.test('displaying line chart with only 1 data point', function (assert) {
        assert.expect(1);
         // this test makes sure the line chart does not crash when only one data
        // point is displayed.
        var done = assert.async();
        this.data.foo.records = this.data.foo.records.slice(0,1);
        var graph = createView({
            View: GraphView,
            model: "foo",
            data: this.data,
            arch: '<graph string="Partners" type="line">' +
                        '<field name="bar"/>' +
                '</graph>',
        });
        return concurrency.delay(0).then(function () {
            assert.ok(graph.$('svg').length, "should have a svg");
            graph.destroy();
            done();
        });
    });

    QUnit.test('displaying line chart data with multiple groupbys', function (assert) {
        // this test makes sure the line chart shows all data labels (X axis) when
        // it is grouped by several fields
        assert.expect(3);

        var graph = createView({
            View: GraphView,
            model: 'foo',
            data: this.data,
            arch: '<graph type="line"><field name="foo" /></graph>',
            groupBy: ['product_id', 'bar'],
        });

        assert.strictEqual(graph.$('.nv-x text:contains(xphone)').length, 1,
            "should contain a text element with product xphone on X axis");
        assert.strictEqual(graph.$('.nv-x text:contains(xpad)').length, 1,
            "should contain a text element with product xpad on X axis");
        assert.strictEqual(graph.$('text:contains(true)').length, 1,
            "should have an entry for each value of field 'bar' in the legend");

        graph.destroy();
    });

    QUnit.test('switching measures', function (assert) {
        var done = assert.async();
        assert.expect(4);

        var rpcCount = 0;

        var graph = createView({
            View: GraphView,
            model: "foo",
            data: this.data,
            arch: '<graph string="Gloups">' +
                        '<field name="product_id"/>' +
                '</graph>',
            mockRPC: function (route, args) {
                rpcCount++;
                return this._super(route, args);
            },
        });
        return concurrency.delay(0).then(function () {
            assert.ok(graph.$('text.nv-legend-text:contains(Count)').length,
                "should have used the correct measure");
            assert.ok(graph.$buttons.find('.dropdown-item[data-field="foo"]').length,
                "should have foo in the list of measures");
            testUtils.dom.click(graph.$buttons.find('.dropdown-toggle:contains(Measures)'));
            testUtils.dom.click(graph.$buttons.find('.dropdown-item[data-field="foo"]'));

            return concurrency.delay(0);
        }).then(function () {
            assert.ok(graph.$('text.nv-legend-text:contains(Foo)').length,
                "should now use the Foo measure");
            assert.strictEqual(rpcCount, 2, "should have done 2 rpcs (2 readgroups)");
            graph.destroy();
            done();
        });
    });

    QUnit.test('no content helper (bar chart)', function (assert) {
        assert.expect(2);
        this.data.foo.records = [];

        var graph = createView({
            View: GraphView,
            model: "foo",
            data: this.data,
            arch: '<graph string="Gloups">' +
                        '<field name="product_id"/>' +
                '</graph>',
        });
        assert.containsNone(graph, 'div.o_graph_svg_container svg.nvd3-svg',
                    "should not contain a div with a svg element");
        assert.containsOnce(graph, 'div.o_view_nocontent',
            "should display the no content helper");
        graph.destroy();
    });

    QUnit.test('no content helper (pie chart)', function (assert) {
        assert.expect(2);
        this.data.foo.records =  []

        var graph = createView({
            View: GraphView,
            model: "foo",
            data: this.data,
            arch: '<graph type="pie">' +
                        '<field name="product_id"/>' +
                '</graph>',
        });
        assert.containsNone(graph, 'div.o_graph_svg_container svg.nvd3-svg',
            "should not contain a div with a svg element");
        assert.containsOnce(graph, 'div.o_view_nocontent',
            "should display the no content helper");
        graph.destroy();
    });

    QUnit.test('render pie chart in comparison mode', function (assert) {
        assert.expect(2);

        var graph = createView({
            View: GraphView,
            model: "foo",
            data: this.data,
            context: {
                timeRangeMenuData: {
                    //Q3 2018
                    timeRange: ['&', ["date", ">=", "2018-07-01"],["date", "<=", "2018-09-30"]],
                    timeRangeDescription: 'This Quarter',
                    //Q4 2018
                    comparisonTimeRange: ['&', ["date", ">=", "2018-10-01"],["date", "<=", "2018-12-31"]],
                    comparisonTimeRangeDescription: 'Previous Period',
                },
            },
            arch: '<graph type="pie">' +
                        '<field name="product_id"/>' +
                '</graph>',
        });

        assert.containsNone(graph, 'div.o_view_nocontent',
        "should not display the no content helper");
        assert.strictEqual($('.o_graph_svg_container svg > text').text(),
            "No data to displayNo data to display", "should display two empty pie charts instead");
        graph.destroy();
    });

    QUnit.test('no content helper after update', function (assert) {
        var done = assert.async();
        assert.expect(4);

        var graph = createView({
            View: GraphView,
            model: "foo",
            data: this.data,
            arch: '<graph string="Gloups">' +
                        '<field name="product_id"/>' +
                '</graph>',
        });
        return concurrency.delay(0).then(function () {
            assert.ok(graph.$('div.o_graph_svg_container svg.nvd3-svg').length,
                        "should contain a div with a svg element");
            assert.notOk(graph.$('div.o_view_nocontent').length,
                "should not display the no content helper");
            testUtils.graph.reload(graph, {domain: [['product_id', '=', 4]]});

            assert.notOk(graph.$('div.o_graph_svg_container svg.nvd3-svg').length,
                        "should not contain a div with a svg element");
            assert.ok(graph.$('div.o_view_nocontent').length,
                "should display the no content helper");
            graph.destroy();
            done();
        });
    });

    QUnit.test('can reload with other group by', function (assert) {
        var done = assert.async();
        assert.expect(4);

        var graph = createView({
            View: GraphView,
            model: "foo",
            data: this.data,
            arch: '<graph string="Gloups">' +
                        '<field name="product_id"/>' +
                '</graph>',
        });
        return concurrency.delay(0).then(function () {
            assert.ok(graph.$('text:contains(xphone)').length,
                        "should contain a text element with product in legend");
            assert.notOk(graph.$('text:contains(red)').length,
                        "should not contain a text element with color in legend");

            testUtils.graph.reload(graph, {groupBy: ['color_id']});

            return concurrency.delay(0);
        }).then(function () {
            assert.notOk(graph.$('text:contains(xphone)').length,
                        "should not contain a text element with product in legend");
            assert.ok(graph.$('text:contains(red)').length,
                        "should contain a text element with color in legend");
            graph.destroy();
            done();
        });
    });

    QUnit.test('getOwnedQueryParams correctly returns mode, measure, groupbys and interval mapping', function (assert) {
        var done = assert.async();
        assert.expect(4);

        var graph = createView({
            View: GraphView,
            model: "foo",
            data: this.data,
            arch: '<graph string="Gloups">' +
                        '<field name="product_id"/>' +
                '</graph>',
        });
        return concurrency.delay(0).then(function () {
            assert.deepEqual(graph.getOwnedQueryParams(), {
                context: {
                    graph_mode: 'bar',
                    graph_measure: '__count__',
                    graph_groupbys: ['product_id'],
                    graph_intervalMapping: {},
                }
            }, "context should be correct");

            testUtils.dom.click(graph.$buttons.find('.dropdown-toggle:contains(Measures)'));
            testUtils.dom.click(graph.$buttons.find('.dropdown-item[data-field="foo"]'));

            return concurrency.delay(0);
        }).then(function () {
            assert.deepEqual(graph.getOwnedQueryParams(), {
                context: {
                    graph_mode: 'bar',
                    graph_measure: 'foo',
                    graph_groupbys: ['product_id'],
                    graph_intervalMapping: {},
                },
            }, "context should be correct");

            testUtils.dom.click(graph.$buttons.find('button[data-mode="line"]'));

            return concurrency.delay(0);
        }).then(function () {
            assert.deepEqual(graph.getOwnedQueryParams(), {
                context: {
                    graph_mode: 'line',
                    graph_measure: 'foo',
                    graph_groupbys: ['product_id'],
                    graph_intervalMapping: {},
                },
            }, "context should be correct");

            testUtils.graph.reload(graph, {groupBy: ['product_id', 'color_id']}); // change groupbys

            return concurrency.delay(0);
        }).then(function () {
            assert.deepEqual(graph.getOwnedQueryParams(), {
                context: {
                    graph_mode: 'line',
                    graph_measure: 'foo',
                    graph_groupbys: ['product_id', 'color_id'],
                    graph_intervalMapping: {},
                },
            }, "context should be correct");

            graph.destroy();
            done();
        });
    });

    QUnit.test('correctly uses graph_ keys from the context', function (assert) {
        var done = assert.async();
        assert.expect(6);

        var lastOne = _.last(this.data.foo.records);
        lastOne.color_id = 14;

        var graph = createView({
            View: GraphView,
            model: "foo",
            data: this.data,
            arch: '<graph><field name="product_id"/></graph>',
            viewOptions: {
                context: {
                    graph_measure: 'foo',
                    graph_mode: 'line',
                    graph_groupbys: ['color_id'],
                },
            },
        });
        return concurrency.delay(0).then(function () {
            // check measure
            assert.strictEqual(graph.$('text.nv-legend-text:contains(Foo)').length, 1,
                "should now use the 'foo' measure");

            // check mode
            assert.strictEqual(graph.renderer.state.mode, "line", "should be in line chart mode");
            assert.doesNotHaveClass(graph.$buttons.find('button[data-mode="bar"]'), 'active',
                'bar chart button should not be active');
            assert.hasClass(graph.$buttons.find('button[data-mode="line"]'),'active',
                'line chart button should be active');

            // check groupbys
            assert.strictEqual(graph.$('text:contains(xphone)').length, 0,
                        "should not contain a text element with product in legend");
            assert.strictEqual(graph.$('text:contains(red)').length, 1,
                        "should contain a text element with color in legend");

            graph.destroy();
            done();
        });
    });

    QUnit.test('correctly use group_by key from the context', function (assert) {
        var done = assert.async();
        assert.expect(2);

        var lastOne = _.last(this.data.foo.records);
        lastOne.color_id = 14;

        var graph = createView({
            View: GraphView,
            model: 'foo',
            data: this.data,
            arch: '<graph><field name="product_id" /></graph>',
            groupBy: ['color_id'],
            viewOptions: {
                context: {
                    graph_measure: 'foo',
                    graph_mode: 'line',
                },
            },
        });
        return concurrency.delay(0).then(function () {
            assert.strictEqual(graph.$('text:contains(xphone)').length, 0,
                        'should not contain a text element with product in legend');
            assert.strictEqual(graph.$('text:contains(red)').length, 1,
                        'should contain a text element with color in legend');
            graph.destroy();
            done();
        });
    });

    QUnit.test('correctly uses graph_ keys from the context (at reload)', function (assert) {
        var done = assert.async();
        assert.expect(8);

        var lastOne = _.last(this.data.foo.records);
        lastOne.color_id = 14;

        var graph = createView({
            View: GraphView,
            model: "foo",
            data: this.data,
            arch: '<graph><field name="product_id"/></graph>',
        });

        assert.strictEqual(graph.renderer.state.mode, "bar", "should be in bar chart mode");
        assert.hasClass(graph.$buttons.find('button[data-mode="bar"]'),'active',
            'bar chart button should be active');

        var reloadParams = {
            context: {
                graph_measure: 'foo',
                graph_mode: 'line',
                graph_groupbys: ['color_id'],
            },
        };
        testUtils.graph.reload(graph, reloadParams);
        return concurrency.delay(0).then(function () {
            // check measure
            assert.strictEqual(graph.$('text.nv-legend-text:contains(Foo)').length, 1,
                "should now use the 'foo' measure");

            // check mode
            assert.strictEqual(graph.renderer.state.mode, "line", "should be in line chart mode");
            assert.doesNotHaveClass(graph.$buttons.find('button[data-mode="bar"]'), 'active',
                'bar chart button should not be active');
            assert.hasClass(graph.$buttons.find('button[data-mode="line"]'),'active',
                'line chart button should be active');

            // check groupbys
            assert.strictEqual(graph.$('text:contains(xphone)').length, 0,
                        "should not contain a text element with product in legend");
            assert.strictEqual(graph.$('text:contains(red)').length, 1,
                        "should contain a text element with color in legend");

            graph.destroy();
            done();
        });
    });

    QUnit.test('reload graph with correct fields', function (assert) {
        assert.expect(2);

        var graph = createView({
            View: GraphView,
            model: 'foo',
            data: this.data,
            arch: '<graph>' +
                    '<field name="product_id" type="row"/>' +
                    '<field name="foo" type="measure"/>' +
                '</graph>',
            mockRPC: function (route, args) {
                if (args.method === 'read_group') {
                    assert.deepEqual(args.kwargs.fields, ['product_id', 'foo'],
                        "should read the correct fields");
                }
                return this._super.apply(this, arguments);
            },
        });

        testUtils.graph.reload(graph, {groupBy: []});

        graph.destroy();
    });

    QUnit.test('initial groupby is kept when reloading', function (assert) {
        var done = assert.async();
        assert.expect(4);

        var graph = createView({
            View: GraphView,
            model: 'foo',
            data: this.data,
            arch: '<graph>' +
                    '<field name="product_id" type="row"/>' +
                    '<field name="foo" type="measure"/>' +
                '</graph>',
            mockRPC: function (route, args) {
                if (args.method === 'read_group') {
                    assert.deepEqual(args.kwargs.groupby, ['product_id'],
                        "should group by the correct field");
                }
                return this._super.apply(this, arguments);
            },
        });


        return concurrency.delay(0).then(function () {
            assert.containsN(graph, '.nv-groups rect', 2,
                "should display two groups");

            testUtils.graph.reload(graph, {groupBy: []});
            return concurrency.delay(0).then(function () {
                assert.containsN(graph, '.nv-groups rect', 2,
                    "should still display two groups");

                graph.destroy();
                done();
            });
        });
    });

    QUnit.test('use a many2one as a measure should work (without groupBy)', function (assert) {
        assert.expect(3);

        var graph = createView({
            View: GraphView,
            model: "foo",
            data: this.data,
            arch: '<graph string="Partners">' +
                        '<field name="product_id" type="measure"/>' +
                '</graph>',
        });
        var done = assert.async();
        return concurrency.delay(0).then(function () {
            assert.containsOnce(graph, 'div.o_graph_svg_container svg.nvd3-svg',
                        "should contain a div with a svg element");

            assert.strictEqual(graph.renderer.state.mode, "bar",
                "should be in bar chart mode by default");
            assert.strictEqual(graph.model.chart.data[0].value, 2,
                "should have a datapoint with value 2");
            graph.destroy();
            done();
        });
    });

    QUnit.test('use a many2one as a measure should work (with groupBy)', function (assert) {
        assert.expect(4);

        var graph = createView({
            View: GraphView,
            model: "foo",
            data: this.data,
            arch: '<graph string="Partners">' +
                        '<field name="bar" type="row"/>' +
                        '<field name="product_id" type="measure"/>' +
                '</graph>',
        });
        var done = assert.async();
        return concurrency.delay(0).then(function () {
            assert.containsOnce(graph, 'div.o_graph_svg_container svg.nvd3-svg',
                        "should contain a div with a svg element");

            assert.strictEqual(graph.renderer.state.mode, "bar",
                "should be in bar chart mode by default");
            assert.strictEqual(graph.model.chart.data[0].value, 1,
                "should have first datapoint with value 2");
            assert.strictEqual(graph.model.chart.data[1].value, 2,
                "should have second datapoint with value 2");
            graph.destroy();
            done();
        });
    });

    QUnit.test('use a many2one as a measure and as a groupby should work', function (assert) {
        assert.expect(2);

        var graph = createView({
            View: GraphView,
            model: "foo",
            data: this.data,
            arch: '<graph string="Partners">' +
                        '<field name="product_id" type="row"/>' +
                '</graph>',
            viewOptions: {
                additionalMeasures: ['product_id'],
            },
        });
        var done = assert.async();
        return concurrency.delay(0).then(function () {
            // need to set the measure this way because it cannot be set in the
            // arch.
            testUtils.dom.click(graph.$buttons.find('.dropdown-toggle:contains(Measures)'));
            testUtils.dom.click(graph.$buttons.find('.dropdown-item[data-field="product_id"]'));

            assert.strictEqual(graph.model.chart.data[0].value, 1,
                "should have first datapoint with value 1");
            assert.strictEqual(graph.model.chart.data[1].value, 1,
                "should have second datapoint with value 1");

            graph.destroy();
            done();
        });
    });

    QUnit.test('not use a many2one as a measure by default', function (assert) {
        assert.expect(1);

        var graph = createView({
            View: GraphView,
            model: "foo",
            data: this.data,
            arch: '<graph string="Partners">' +
                        '<field name="product_id"/>' +
                '</graph>',
        });
        var done = assert.async();
        return concurrency.delay(0).then(function () {
            assert.notOk(graph.measures.product_id,
                "should not have product_id as measure");
            graph.destroy();
            done();
        });
    });

    QUnit.test('use a many2one as a measure if set as additional fields', function (assert) {
        assert.expect(1);

        var graph = createView({
            View: GraphView,
            model: "foo",
            data: this.data,
            arch: '<graph string="Partners">' +
                        '<field name="product_id"/>' +
                '</graph>',
            viewOptions: {
                additionalMeasures: ['product_id'],
            },
        });
        var done = assert.async();
        return concurrency.delay(0).then(function () {
            assert.ok(graph.measures.product_id,
                "should have product_id as measure");
            graph.destroy();
            done();
        });
    });

    QUnit.test('graph view crash when moving from search view using Down key', function (assert) {
        assert.expect(1);

        var graph = createView({
            View: GraphView,
            model: "foo",
            data: this.data,
            arch: '<graph string="Partners" type="pie">' +
                        '<field name="bar"/>' +
                '</graph>',
        });
        graph.renderer.giveFocus();
        assert.ok(true,"should not generate any error");
        graph.destroy();
    });

    QUnit.test('graph measures should be alphabetically sorted', function (assert) {
        assert.expect(2);

        var data = this.data;
        data.foo.fields.bouh = {string: "bouh", type: "integer"};

        var graph = createView({
            View: GraphView,
            model: "foo",
            data: data,
            arch: '<graph string="Partners">' +
                        '<field name="foo" type="measure"/>' +
                        '<field name="bouh" type="measure"/>' +
                  '</graph>',
        })

        assert.strictEqual(graph.$buttons.find('.o_graph_measures_list .dropdown-item:first').data('field'), 'bouh',
            "Bouh should be the first measure");
        assert.strictEqual(graph.$buttons.find('.o_graph_measures_list .dropdown-item:last').data('field'), '__count__',
            "Count should be the last measure");

        graph.destroy();
    });

    QUnit.test('Undefined should appear in bar, pie graph but not in line graph', function (assert) {
        assert.expect(4);

        var graph = createView({
            View: GraphView,
            model: "foo",
            groupBy:['date'],
            data: this.data,
            arch: '<graph string="Partners" type="line">' +
                        '<field name="bar"/>' +
                '</graph>',
        });

        assert.strictEqual(graph.$("svg.nvd3-svg .nv-x:contains('Undefined')").length, 0);
        assert.strictEqual(graph.$("svg.nvd3-svg:contains('January')").length, 1);

        testUtils.dom.click(graph.$buttons.find('.o_graph_button[data-mode=bar]'));
        assert.strictEqual(graph.$("svg.nvd3-svg .nv-x:contains('Undefined')").length, 1);
        assert.strictEqual(graph.$("svg.nvd3-svg:contains('January')").length, 1);

        graph.destroy();
    });

    QUnit.test('Undefined should appear in bar, pie graph but not in line graph with multiple groupbys', function (assert) {
        assert.expect(6);

        var graph = createView({
            View: GraphView,
            model: "foo",
            groupBy:['date', 'color_id'],
            data: this.data,
            arch: '<graph string="Partners" type="line">' +
                        '<field name="bar"/>' +
                '</graph>',
        });

        assert.strictEqual(graph.$("svg.nvd3-svg .nv-x:contains('Undefined')").length, 0);
        assert.strictEqual(graph.$("svg.nvd3-svg:contains('January')").length, 1);

        graph.$buttons.find('.o_graph_button[data-mode=bar]').click();
        assert.strictEqual(graph.$("svg.nvd3-svg .nv-x:contains('Undefined')").length, 1);
        assert.strictEqual(graph.$("svg.nvd3-svg:contains('January')").length, 1);

        // Undefined should not appear after switching back to line chart
        graph.$buttons.find('.o_graph_button[data-mode=line]').click();
        assert.strictEqual(graph.$("svg.nvd3-svg .nv-x:contains('Undefined')").length, 0);
        assert.strictEqual(graph.$("svg.nvd3-svg:contains('January')").length, 1);
        graph.destroy();
    });
});

});