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D5953.1765129477.diff
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diff --git a/lib/shared/reaction-utils.test.js b/lib/shared/reaction-utils.test.js
new file mode 100644
--- /dev/null
+++ b/lib/shared/reaction-utils.test.js
@@ -0,0 +1,114 @@
+// @flow
+
+import type { MessageReactionInfo } from '../selectors/chat-selectors';
+import { stringForReactionList } from './reaction-utils';
+
+describe(
+ 'stringForReactionList(' +
+ 'reactions: $ReadOnlyMap<string, MessageReactionInfo>)',
+ () => {
+ it(
+ 'should return (👍 3) for a message with three user likes' +
+ 'including the viewer',
+ () => {
+ const messageLikesUsers = ['83810', '86622', '83889'];
+ const messageLikesUsersSet = new Set(messageLikesUsers);
+ const messageLikesInfo = {
+ users: messageLikesUsersSet,
+ viewerReacted: true,
+ };
+
+ const reactionsMap = new Map<string, MessageReactionInfo>();
+ reactionsMap.set('👍', messageLikesInfo);
+
+ expect(stringForReactionList(reactionsMap)).toBe('👍 3');
+ },
+ );
+
+ it(
+ 'should return (👍 3) for a message with three user likes' +
+ 'not including the viewer',
+ () => {
+ const messageLikesUsers = ['83810', '86622', '83889'];
+ const messageLikesUsersSet = new Set(messageLikesUsers);
+ const messageLikesInfo = {
+ users: messageLikesUsersSet,
+ viewerReacted: false,
+ };
+
+ const reactionsMap = new Map<string, MessageReactionInfo>();
+ reactionsMap.set('👍', messageLikesInfo);
+
+ expect(stringForReactionList(reactionsMap)).toBe('👍 3');
+ },
+ );
+
+ it(
+ 'should return (👍) for a message with one user like' +
+ 'including the viewer',
+ () => {
+ const messageLikesUsers = ['83810'];
+ const messageLikesUsersSet = new Set(messageLikesUsers);
+ const messageLikesInfo = {
+ users: messageLikesUsersSet,
+ viewerReacted: true,
+ };
+
+ const reactionsMap = new Map<string, MessageReactionInfo>();
+ reactionsMap.set('👍', messageLikesInfo);
+
+ expect(stringForReactionList(reactionsMap)).toBe('👍');
+ },
+ );
+
+ it(
+ 'should return (👍) for a message with one user like' +
+ 'not including the viewer',
+ () => {
+ const messageLikesUsers = ['86622'];
+ const messageLikesUsersSet = new Set(messageLikesUsers);
+ const messageLikesInfo = {
+ users: messageLikesUsersSet,
+ viewerReacted: false,
+ };
+
+ const reactionsMap = new Map<string, MessageReactionInfo>();
+ reactionsMap.set('👍', messageLikesInfo);
+
+ expect(stringForReactionList(reactionsMap)).toBe('👍');
+ },
+ );
+
+ it('should return an empty string for a message no reactions', () => {
+ const reactionsMap = new Map<string, MessageReactionInfo>();
+
+ expect(stringForReactionList(reactionsMap)).toBe('');
+ });
+
+ it(
+ 'should return (👍 😆 3) for a message with one like not including' +
+ 'the viewer and three laugh reactions including the viewer',
+ () => {
+ const messageLikesUsers = ['86622'];
+ const messageLikesUsersSet = new Set(messageLikesUsers);
+ const messageLikesInfo = {
+ users: messageLikesUsersSet,
+ viewerReacted: false,
+ };
+
+ const messageLaughsUsers = ['12345', '67890', '83889'];
+ const messageLaughsUsersSet = new Set(messageLaughsUsers);
+ const messageLaughsInfo = {
+ users: messageLaughsUsersSet,
+ viewerReacted: true,
+ };
+
+ const reactionsMap = new Map<string, MessageReactionInfo>();
+ reactionsMap.set('👍', messageLikesInfo);
+ reactionsMap.set('😆', messageLaughsInfo);
+
+ expect(stringForReactionList(reactionsMap)).toBe('👍 😆 3');
+ },
+ );
+ },
+);

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