wiki.techinc.nl/tests/api-testing/action/Links.js

const { action, assert, utils } = require( 'api-testing' );

describe( 'Links', function testLinks() {
	const titles = ( list ) => list.map( ( p )=>utils.dbkey( p.title ) );

	const pageX = utils.title( 'LinkTest_X_' );
	const pageY = utils.title( 'LinkTest_Y_' );
	const imageY = `File:${pageY}`;
	const urlY = `http://example.com/${pageY}`;

	// TODO: language links, interwiki links...

	let alice;

	before( async () => {
		alice = await action.alice();

		const textX = `Mention a [[${pageY}|Page]], ` +
            `include an [[${imageY}]] and also link to [[:${imageY}]], ` +
            `link to a URL[${urlY}]`;

		// Do all edits in parallel.
		await Promise.all( [
			alice.edit( pageX, { text: textX } ),
			alice.edit( pageY, { text: 'Just some text' } )
		] );
	} );

	describe( 'to pages', () => {
		it( 'can be listed', async () => {
			const result = await alice.prop( 'links', pageX );
			const links = titles( result[ pageX ].links );

			assert.sameMembers( links, [ pageY, imageY ] );
		} );

		it( 'can be filtered by namespace', async () => {
			const result = await alice.prop( 'links', pageX, { plnamespace: 0 } );
			const links = titles( result[ pageX ].links );

			assert.sameMembers( links, [ pageY ] );
		} );
	} );

	describe( 'from pages', () => {
		it( 'can be listed', async () => {
			const result = await alice.prop( 'linkshere', pageY );
			const links = titles( result[ pageY ].linkshere );

			assert.sameMembers( links, [ pageX ] );
		} );
	} );

	describe( 'to external pages', () => {
		it( 'can be listed', async () => {
			const result = await alice.prop( 'extlinks', pageX );
			const links = result[ pageX ].extlinks.map( ( p )=>p[ '*' ] );

			assert.sameMembers( links, [ urlY ] );
		} );
	} );

	describe( 'to media', () => {
		it( 'can be listed', async () => {
			const result = await alice.prop( 'images', pageX );
			const links = titles( result[ pageX ].images );

			assert.sameMembers( links, [ imageY ] );
		} );
	} );
} );