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import 'mocha';
import { expect } from 'chai';
import {
createElement,
Component,
toChildArray,
FunctionalComponent,
ComponentConstructor,
ComponentFactory,
VNode,
ComponentChildren,
cloneElement
} from '../../';
function getDisplayType(vnode: VNode | string | number) {
if (typeof vnode === 'string' || typeof vnode == 'number') {
return vnode.toString();
} else if (typeof vnode.type == 'string') {
return vnode.type;
} else {
return vnode.type.displayName;
}
}
class SimpleComponent extends Component<{}, {}> {
render() {
return <div>{this.props.children}</div>;
}
}
const SimpleFunctionalComponent = () => <div />;
const a: ComponentFactory = SimpleComponent;
const b: ComponentFactory = SimpleFunctionalComponent;
describe('VNode TS types', () => {
it('is returned by h', () => {
const actual = <div className="wow" />;
expect(actual).to.include.all.keys('type', 'props', 'key');
});
it('has a nodeName of string when html element', () => {
const div = <div>Hi!</div>;
expect(div.type).to.equal('div');
});
it('has a nodeName equal to the construction function when SFC', () => {
const sfc = <SimpleFunctionalComponent />;
expect(sfc.type).to.be.instanceOf(Function);
const constructor = sfc.type as FunctionalComponent<any>;
expect(constructor.name).to.eq('SimpleFunctionalComponent');
});
it('has a nodeName equal to the constructor of a component', () => {
const sfc = <SimpleComponent />;
expect(sfc.type).to.be.instanceOf(Function);
const constructor = sfc.type as ComponentConstructor<any>;
expect(constructor.name).to.eq('SimpleComponent');
});
it('has children which is an array of string or other vnodes', () => {
const comp = (
<SimpleComponent>
<SimpleComponent>child1</SimpleComponent>
child2
</SimpleComponent>
);
expect(comp.props.children).to.be.instanceOf(Array);
expect(comp.props.children[1]).to.be.a('string');
});
it('children type should work with toChildArray', () => {
const comp: VNode = <SimpleComponent>child1 {1}</SimpleComponent>;
const children = toChildArray(comp.props.children);
expect(children).to.have.lengthOf(2);
});
it('toChildArray should filter out some types', () => {
const compChild = <SimpleComponent />;
const comp: VNode = (
<SimpleComponent>
a{null}
{true}
{false}
{2}
{undefined}
{['b', 'c']}
{compChild}
</SimpleComponent>
);
const children = toChildArray(comp.props.children);
expect(children).to.deep.equal(['a', 2, 'b', 'c', compChild]);
});
it('functions like getDisplayType should work', () => {
function TestComp(props: { children?: ComponentChildren }) {
return <div>{props.children}</div>;
}
TestComp.displayName = 'TestComp';
const compChild = <TestComp />;
const comp: VNode = (
<SimpleComponent>
a{null}
{true}
{false}
{2}
{undefined}
{['b', 'c']}
{compChild}
</SimpleComponent>
);
const types = toChildArray(comp.props.children).map(getDisplayType);
expect(types).to.deep.equal(['a', '2', 'b', 'c', 'TestComp']);
});
it('component should work with cloneElement', () => {
const comp: VNode = (
<SimpleComponent>
<div>child 1</div>
</SimpleComponent>
);
const clone: VNode = cloneElement(comp);
expect(comp.type).to.equal(clone.type);
expect(comp.props).not.to.equal(clone.props);
expect(comp.props).to.deep.equal(clone.props);
});
it('component should work with cloneElement using generics', () => {
const comp: VNode<string> = <SimpleComponent></SimpleComponent>;
const clone: VNode<string> = cloneElement<string>(comp);
expect(comp.type).to.equal(clone.type);
expect(comp.props).not.to.equal(clone.props);
expect(comp.props).to.deep.equal(clone.props);
});
});
class ComponentWithFunctionChild extends Component<{
children: (num: number) => string;
}> {
render() {
return null;
}
}
<ComponentWithFunctionChild>
{num => num.toFixed(2)}
</ComponentWithFunctionChild>;
class ComponentWithStringChild extends Component<{ children: string }> {
render() {
return null;
}
}
<ComponentWithStringChild>child</ComponentWithStringChild>;
class ComponentWithNumberChild extends Component<{ children: number }> {
render() {
return null;
}
}
<ComponentWithNumberChild>{1}</ComponentWithNumberChild>;
class ComponentWithBooleanChild extends Component<{ children: boolean }> {
render() {
return null;
}
}
<ComponentWithBooleanChild>{false}</ComponentWithBooleanChild>;
class ComponentWithNullChild extends Component<{ children: null }> {
render() {
return null;
}
}
<ComponentWithNullChild>{null}</ComponentWithNullChild>;
class ComponentWithNumberChildren extends Component<{ children: number[] }> {
render() {
return null;
}
}
<ComponentWithNumberChildren>
{1}
{2}
</ComponentWithNumberChildren>;
|
