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import moment from 'moment';
import { sameDay, sameSite, injectRecommendations } from '../utils';
describe( 'reader stream', () => {
const today = moment().toDate();
const postKey1 = { feedId: 'feed1', postId: 'postId1', date: today };
const postKey2 = { feedId: 'feed1', postId: 'postId2', date: today };
describe( '#sameDay', () => {
const datePostKey = ( date ) => ( { date } );
const todayPostKey = datePostKey( today );
const todayPostKey2 = datePostKey( new Date() );
const oneYearAgoPostKey = datePostKey( moment( today ).subtract( 1, 'year' ).toDate() );
const oneYearInTheFuturePostKey = datePostKey( moment( today ).add( 1, 'year' ).toDate() );
const oneMonthAgoPostKey = datePostKey( moment( today ).subtract( 1, 'month' ).toDate() );
test( 'should return true when two days are the same day', () => {
expect( sameDay( todayPostKey, todayPostKey2 ) ).toBe( true );
} );
test( 'should return false when two days are not the same day', () => {
expect( sameDay( todayPostKey, oneYearAgoPostKey ) ).toBe( false );
expect( sameDay( todayPostKey, oneYearInTheFuturePostKey ) ).toBe( false );
expect( sameDay( todayPostKey, oneMonthAgoPostKey ) ).toBe( false );
} );
} );
describe( '#sameSite', () => {
test( 'should return true when two postKeys represent the same site', () => {
const postId = 'postId';
const isSame = sameSite( { blogId: 'site1', postId }, { blogId: 'site1', postId } );
expect( isSame ).toBe( true );
} );
test( 'should return true when two postKeys represent the same feed', () => {
const isSame = sameSite( postKey1, postKey2 );
expect( isSame ).toBe( true );
} );
test( 'recs should never be marked as sameSite', () => {
const isSame = sameSite(
{ ...postKey1, isRecommendationBlock: 'isRecommendationBlock' },
postKey1
);
expect( isSame ).toBe( false );
} );
} );
describe( '#injectRecommendations', () => {
const rec = () => ( { type: 'rec' } );
const post = () => ( { type: 'post' } );
const createRecBlock = ( recs, index ) => ( {
isRecommendationBlock: true,
index,
recommendations: recs,
} );
test( 'should not modify items if empty recs', () => {
const items = [ {} ];
const injectedItems = injectRecommendations( items, [], 1 );
expect( injectedItems ).toEqual( items );
} );
test( 'should not modify items if cards per rec is greater than length of items', () => {
const recs = [ postKey1, postKey1, postKey1, postKey1 ];
const items = [ {} ];
const injectedItems = injectRecommendations( items, recs, 1 );
expect( injectedItems ).toEqual( items );
} );
test( 'should inject 2 recs for each regular post when cards per rec = 1', () => {
const recs = [ rec(), rec(), rec(), rec(), rec(), rec(), rec(), rec() ];
const items = [ post(), post(), post(), post(), post() ];
const injectedItems = injectRecommendations( items, recs, 1 );
expect( injectedItems ).toEqual( [
post(),
createRecBlock( [ rec(), rec() ], 0 ),
post(),
createRecBlock( [ rec(), rec() ], 2 ),
post(),
createRecBlock( [ rec(), rec() ], 4 ),
post(),
createRecBlock( [ rec(), rec() ], 6 ),
post(),
] );
} );
test( 'should gracefully run out of recs by inserting until it runs out', () => {
const recs = [ rec(), rec() ];
const items = [ post(), post(), post() ];
const injectedItems = injectRecommendations( items, recs, 1 );
expect( injectedItems ).toEqual( [
post(),
createRecBlock( [ rec(), rec() ], 0 ),
post(),
post(),
] );
} );
test( 'should inject 2 recs for each 4 regular posts when cards per rec = 4', () => {
const recs = [ rec(), rec() ];
const items = [ post(), post(), post(), post(), post() ];
const injectedItems = injectRecommendations( items, recs, 4 );
expect( injectedItems ).toEqual( [
post(),
post(),
post(),
post(),
createRecBlock( [ rec(), rec() ], 0 ),
post(),
] );
} );
} );
} );
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