gutenberg/element/test/index.js at d5fc22a190499088010baab58228116228c6f25f · WordPress/gutenberg · GitHub

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/**
 * External dependencies
 */
import { expect } from 'chai';

/**
 * Internal dependencies
 */
import { createElement, renderToString, concatChildren } from '../';

describe( 'element', () => {
	describe( 'renderToString', () => {
		it( 'should return an empty string for a falsey value', () => {
			expect( renderToString() ).to.equal( '' );
			expect( renderToString( false ) ).to.equal( '' );
			expect( renderToString( null ) ).to.equal( '' );
			expect( renderToString( 0 ) ).to.equal( '' );
		} );

		it( 'should return a string verbatim', () => {
			expect( renderToString( 'Zucchini' ) ).to.equal( 'Zucchini' );
		} );

		it( 'should return a string from an array', () => {
			expect( renderToString( [
				'Zucchini ',
				createElement( 'em', null, 'is a' ),
				' summer squash'
			] ) ).to.equal( 'Zucchini <em>is a</em> summer squash' );
		} );

		it( 'should return a string from an element', () => {
			expect( renderToString(
				createElement( 'strong', null, 'Courgette' )
			) ).to.equal( '<strong>Courgette</strong>' );
		} );
	} );

	describe( 'concatChildren', () => {
		it( 'should return an empty array for undefined children', () => {
			expect( concatChildren() ).to.eql( [] );
		} );

		it( 'should concat the string arrays', () => {
			expect( concatChildren( [ 'a' ], 'b' ) ).to.eql( [ 'a', 'b' ] );
		} );

		it( 'should concat the object arrays and rewrite keys', () => {
			const concat = concatChildren(
				[ createElement( 'strong', null, 'Courgette' ) ],
				createElement( 'strong', null, 'Concombre' )
			);
			expect( concat.length ).to.equal( 2 );
			expect( concat[ 0 ].key = 0 );
			expect( concat[ 1 ].key = 1 );
		} );
	} );
} );