fix(GuildEmojiRoleStore): do not prematurely patch roles

Issue is the same as in #2312 and #2381, but for the GuildEmojiRoleStore.
Thanks to @KingDGrizzle for pointing this out.

src/client/actions/GuildEmojisUpdate.js

@@ -12,7 +12,7 @@ class GuildEmojisUpdateAction extends Action {
       const cachedEmoji = guild.emojis.get(emoji.id);
       if (cachedEmoji) {
         deletions.delete(emoji.id);
-        if (!cachedEmoji.equals(emoji, true)) {
+        if (!cachedEmoji.equals(emoji)) {
           // Emoji updated
           this.client.actions.GuildEmojiUpdate.handle(cachedEmoji, emoji);
         }

src/stores/GuildEmojiRoleStore.js

@@ -27,11 +27,9 @@ class GuildEmojiRoleStore extends DataStore {
     if (roleOrRoles.includes(null)) {
       return Promise.reject(new TypeError('INVALID_TYPE', 'roles',
         'Array or Collection of Roles or Snowflakes', true));
-    } else {
-      for (const role of roleOrRoles) super.set(role.id, role);
     }
-
-    return this.set(this);
+    const newRoles = [...new Set(roleOrRoles.concat(this.array()))];
+    return this.set(newRoles);
   }
 
   /**
@@ -48,11 +46,9 @@ class GuildEmojiRoleStore extends DataStore {
     if (roleOrRoles.includes(null)) {
       return Promise.reject(new TypeError('INVALID_TYPE', 'roles',
         'Array or Collection of Roles or Snowflakes', true));
-    } else {
-      for (const role of roleOrRoles) super.remove(role);
     }
-
-    return this.set(this);
+    const newRoles = this.keyArray().filter(role => !roleOrRoles.includes(role));
+    return this.set(newRoles);
   }
 
   /**
@@ -74,6 +70,12 @@ class GuildEmojiRoleStore extends DataStore {
     return this.emoji.edit({ roles });
   }
 
+  clone() {
+    const clone = new this.constructor(this.emoji);
+    clone._patch(this.keyArray());
+    return clone;
+  }
+
   /**
    * Patches the roles for this store
    * @param {Snowflake[]} roles The new roles

src/structures/GuildEmoji.js

@@ -43,6 +43,12 @@ class GuildEmoji extends Emoji {
     if (data.roles) this.roles._patch(data.roles);
   }
 
+  _clone() {
+    const clone = super._clone();
+    clone.roles = this.roles.clone();
+    return clone;
+  }
+
   /**
    * The timestamp the emoji was created at
    * @type {number}
@@ -94,7 +100,11 @@ class GuildEmoji extends Emoji {
         name: data.name,
         roles: data.roles ? data.roles.map(r => r.id ? r.id : r) : undefined,
       }, reason })
-      .then(() => this);
+      .then(() => {
+        const clone = this._clone();
+        clone._patch(data);
+        return clone;
+      });
   }
 
   /**
@@ -129,12 +139,14 @@ class GuildEmoji extends Emoji {
         other.name === this.name &&
         other.managed === this.managed &&
         other.requiresColons === this.requiresColons &&
+        other.roles.size === this.roles.size &&
         other.roles.every(role => this.roles.has(role.id))
       );
     } else {
       return (
         other.id === this.id &&
         other.name === this.name &&
+        other.roles.length === this.roles.size &&
         other.roles.every(role => this.roles.has(role))
       );
     }