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describe('Chart.plugins', function() {
beforeEach(function() {
this._plugins = Chart.plugins.getAll();
Chart.plugins.clear();
});
afterEach(function() {
Chart.plugins.clear();
Chart.plugins.register(this._plugins);
delete this._plugins;
});
describe('Chart.plugins.register', function() {
it('should register a plugin', function() {
Chart.plugins.register({});
expect(Chart.plugins.count()).toBe(1);
Chart.plugins.register({});
expect(Chart.plugins.count()).toBe(2);
});
it('should register an array of plugins', function() {
Chart.plugins.register([{}, {}, {}]);
expect(Chart.plugins.count()).toBe(3);
});
it('should succeed to register an already registered plugin', function() {
var plugin = {};
Chart.plugins.register(plugin);
expect(Chart.plugins.count()).toBe(1);
Chart.plugins.register(plugin);
expect(Chart.plugins.count()).toBe(1);
Chart.plugins.register([{}, plugin, plugin]);
expect(Chart.plugins.count()).toBe(2);
});
});
describe('Chart.plugins.unregister', function() {
it('should unregister a plugin', function() {
var plugin = {};
Chart.plugins.register(plugin);
expect(Chart.plugins.count()).toBe(1);
Chart.plugins.unregister(plugin);
expect(Chart.plugins.count()).toBe(0);
});
it('should unregister an array of plugins', function() {
var plugins = [{}, {}, {}];
Chart.plugins.register(plugins);
expect(Chart.plugins.count()).toBe(3);
Chart.plugins.unregister(plugins.slice(0, 2));
expect(Chart.plugins.count()).toBe(1);
});
it('should succeed to unregister a plugin not registered', function() {
var plugin = {};
Chart.plugins.register(plugin);
expect(Chart.plugins.count()).toBe(1);
Chart.plugins.unregister({});
expect(Chart.plugins.count()).toBe(1);
Chart.plugins.unregister([{}, plugin]);
expect(Chart.plugins.count()).toBe(0);
});
});
describe('Chart.plugins.notify', function() {
it('should call inline plugins with arguments', function() {
var plugin = {hook: function() {}};
var chart = window.acquireChart({
plugins: [plugin]
});
spyOn(plugin, 'hook');
Chart.plugins.notify(chart, 'hook', 42);
expect(plugin.hook.calls.count()).toBe(1);
expect(plugin.hook.calls.first().args[0]).toBe(chart);
expect(plugin.hook.calls.first().args[1]).toBe(42);
expect(plugin.hook.calls.first().args[2]).toEqual({});
});
it('should call global plugins with arguments', function() {
var plugin = {hook: function() {}};
var chart = window.acquireChart({});
spyOn(plugin, 'hook');
Chart.plugins.register(plugin);
Chart.plugins.notify(chart, 'hook', 42);
expect(plugin.hook.calls.count()).toBe(1);
expect(plugin.hook.calls.first().args[0]).toBe(chart);
expect(plugin.hook.calls.first().args[1]).toBe(42);
expect(plugin.hook.calls.first().args[2]).toEqual({});
});
it('should call plugin only once even if registered multiple times', function() {
var plugin = {hook: function() {}};
var chart = window.acquireChart({
plugins: [plugin, plugin]
});
spyOn(plugin, 'hook');
Chart.plugins.register([plugin, plugin]);
Chart.plugins.notify(chart, 'hook');
expect(plugin.hook.calls.count()).toBe(1);
});
it('should call plugins in the correct order (global first)', function() {
var results = [];
var chart = window.acquireChart({
plugins: [{
hook: function() {
results.push(1);
}
}, {
hook: function() {
results.push(2);
}
}, {
hook: function() {
results.push(3);
}
}]
});
Chart.plugins.register([{
hook: function() {
results.push(4);
}
}, {
hook: function() {
results.push(5);
}
}, {
hook: function() {
results.push(6);
}
}]);
var ret = Chart.plugins.notify(chart, 'hook');
expect(ret).toBeTruthy();
expect(results).toEqual([4, 5, 6, 1, 2, 3]);
});
it('should return TRUE if no plugin explicitly returns FALSE', function() {
var chart = window.acquireChart({
plugins: [{
hook: function() {}
}, {
hook: function() {
return null;
}
}, {
hook: function() {
return 0;
}
}, {
hook: function() {
return true;
}
}, {
hook: function() {
return 1;
}
}]
});
var plugins = chart.config.plugins;
plugins.forEach(function(plugin) {
spyOn(plugin, 'hook').and.callThrough();
});
var ret = Chart.plugins.notify(chart, 'hook');
expect(ret).toBeTruthy();
plugins.forEach(function(plugin) {
expect(plugin.hook).toHaveBeenCalled();
});
});
it('should return FALSE if any plugin explicitly returns FALSE', function() {
var chart = window.acquireChart({
plugins: [{
hook: function() {}
}, {
hook: function() {
return null;
}
}, {
hook: function() {
return false;
}
}, {
hook: function() {
return 42;
}
}, {
hook: function() {
return 'bar';
}
}]
});
var plugins = chart.config.plugins;
plugins.forEach(function(plugin) {
spyOn(plugin, 'hook').and.callThrough();
});
var ret = Chart.plugins.notify(chart, 'hook');
expect(ret).toBeFalsy();
expect(plugins[0].hook).toHaveBeenCalled();
expect(plugins[1].hook).toHaveBeenCalled();
expect(plugins[2].hook).toHaveBeenCalled();
expect(plugins[3].hook).not.toHaveBeenCalled();
expect(plugins[4].hook).not.toHaveBeenCalled();
});
});
describe('config.options.plugins', function() {
it('should call plugins with options at last argument', function() {
var plugin = {id: 'foo', hook: function() {}};
var chart = window.acquireChart({
options: {
plugins: {
foo: {a: '123'},
}
}
});
spyOn(plugin, 'hook');
Chart.plugins.register(plugin);
Chart.plugins.notify(chart, 'hook');
Chart.plugins.notify(chart, 'hook', ['bla']);
Chart.plugins.notify(chart, 'hook', ['bla', 42]);
expect(plugin.hook.calls.count()).toBe(3);
expect(plugin.hook.calls.argsFor(0)[1]).toEqual({a: '123'});
expect(plugin.hook.calls.argsFor(1)[2]).toEqual({a: '123'});
expect(plugin.hook.calls.argsFor(2)[3]).toEqual({a: '123'});
});
it('should call plugins with options associated to their identifier', function() {
var plugins = {
a: {id: 'a', hook: function() {}},
b: {id: 'b', hook: function() {}},
c: {id: 'c', hook: function() {}}
};
Chart.plugins.register(plugins.a);
var chart = window.acquireChart({
plugins: [plugins.b, plugins.c],
options: {
plugins: {
a: {a: '123'},
b: {b: '456'},
c: {c: '789'}
}
}
});
spyOn(plugins.a, 'hook');
spyOn(plugins.b, 'hook');
spyOn(plugins.c, 'hook');
Chart.plugins.notify(chart, 'hook');
expect(plugins.a.hook).toHaveBeenCalled();
expect(plugins.b.hook).toHaveBeenCalled();
expect(plugins.c.hook).toHaveBeenCalled();
expect(plugins.a.hook.calls.first().args[1]).toEqual({a: '123'});
expect(plugins.b.hook.calls.first().args[1]).toEqual({b: '456'});
expect(plugins.c.hook.calls.first().args[1]).toEqual({c: '789'});
});
it('should not called plugins when config.options.plugins.{id} is FALSE', function() {
var plugins = {
a: {id: 'a', hook: function() {}},
b: {id: 'b', hook: function() {}},
c: {id: 'c', hook: function() {}}
};
Chart.plugins.register(plugins.a);
var chart = window.acquireChart({
plugins: [plugins.b, plugins.c],
options: {
plugins: {
a: false,
b: false
}
}
});
spyOn(plugins.a, 'hook');
spyOn(plugins.b, 'hook');
spyOn(plugins.c, 'hook');
Chart.plugins.notify(chart, 'hook');
expect(plugins.a.hook).not.toHaveBeenCalled();
expect(plugins.b.hook).not.toHaveBeenCalled();
expect(plugins.c.hook).toHaveBeenCalled();
});
it('should call plugins with default options when plugin options is TRUE', function() {
var plugin = {id: 'a', hook: function() {}};
Chart.defaults.global.plugins.a = {a: 42};
Chart.plugins.register(plugin);
var chart = window.acquireChart({
options: {
plugins: {
a: true
}
}
});
spyOn(plugin, 'hook');
Chart.plugins.notify(chart, 'hook');
expect(plugin.hook).toHaveBeenCalled();
expect(plugin.hook.calls.first().args[1]).toEqual({a: 42});
delete Chart.defaults.global.plugins.a;
});
it('should call plugins with default options if plugin config options is undefined', function() {
var plugin = {id: 'a', hook: function() {}};
Chart.defaults.global.plugins.a = {a: 'foobar'};
Chart.plugins.register(plugin);
spyOn(plugin, 'hook');
var chart = window.acquireChart();
Chart.plugins.notify(chart, 'hook');
expect(plugin.hook).toHaveBeenCalled();
expect(plugin.hook.calls.first().args[1]).toEqual({a: 'foobar'});
delete Chart.defaults.global.plugins.a;
});
// https://github.com/chartjs/Chart.js/issues/5111#issuecomment-355934167
it('should invalidate cache when update plugin options', function() {
var plugin = {id: 'a', hook: function() {}};
var chart = window.acquireChart({
plugins: [plugin],
options: {
plugins: {
a: {
foo: 'foo'
}
}
},
});
spyOn(plugin, 'hook');
Chart.plugins.notify(chart, 'hook');
expect(plugin.hook).toHaveBeenCalled();
expect(plugin.hook.calls.first().args[1]).toEqual({foo: 'foo'});
chart.options.plugins.a = {bar: 'bar'};
chart.update();
plugin.hook.calls.reset();
Chart.plugins.notify(chart, 'hook');
expect(plugin.hook).toHaveBeenCalled();
expect(plugin.hook.calls.first().args[1]).toEqual({bar: 'bar'});
});
});
});
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