emoji tests: Clean up data setup.

With update_emojis, it is pretty easy
to set up the tests with reasonable
data without reaching into internal
data structures.

Also, we can begin the process of
sharing the same data with our
dispatch tests (upcoming).

frontend_tests/node_tests/emoji.js

@@ -1,13 +1,18 @@
+const events = require("./lib/events.js");
+
 zrequire("emoji");
 
+const realm_emojis = events.fixtures.realm_emoji.realm_emoji;
+
+emoji.update_emojis(realm_emojis);
+
+run_test("sanity check", () => {
+    assert.equal(emoji.get_server_realm_emoji_data(), realm_emojis);
+});
+
 run_test("get_canonical_name", () => {
-    emoji.active_realm_emojis = new Map(
-        Object.entries({
-            realm_emoji: "TBD",
-        }),
-    );
-    let canonical_name = emoji.get_canonical_name("realm_emoji");
-    assert.equal(canonical_name, "realm_emoji");
+    let canonical_name = emoji.get_canonical_name("green_tick");
+    assert.equal(canonical_name, "green_tick");
 
     canonical_name = emoji.get_canonical_name("thumbs_up");
     assert.equal(canonical_name, "+1");
@@ -22,19 +27,6 @@ run_test("get_canonical_name", () => {
     emoji.get_canonical_name("non_existent");
 });
 
-function set_up_spain_realm_emoji_for_test() {
-    const realm_emojis = {
-        101: {
-            id: 101,
-            name: "spain",
-            source_url: "/some/path/to/spain.png",
-            deactivated: false,
-        },
-    };
-    emoji.update_emojis(realm_emojis);
-    assert.equal(emoji.get_server_realm_emoji_data(), realm_emojis);
-}
-
 run_test("get_emoji_* API", () => {
     assert.equal(emoji.get_emoji_name("1f384"), "holiday_tree");
     assert.equal(emoji.get_emoji_name("1f951"), "avocado");
@@ -44,7 +36,5 @@ run_test("get_emoji_* API", () => {
     assert.equal(emoji.get_emoji_codepoint("holiday_tree"), "1f384");
     assert.equal(emoji.get_emoji_codepoint("bogus"), undefined);
 
-    assert.equal(emoji.get_realm_emoji_url("spain"), undefined);
-    set_up_spain_realm_emoji_for_test();
     assert.equal(emoji.get_realm_emoji_url("spain"), "/some/path/to/spain.png");
 });

frontend_tests/node_tests/lib/events.js

@@ -307,8 +307,18 @@ exports.fixtures = {
     realm_emoji: {
         type: "realm_emoji",
         realm_emoji: {
-            airplane: {
-                source_url: "some_url",
+            101: {
+                id: "101",
+                name: "spain",
+                source_url: "/some/path/to/spain.png",
+                deactivated: false,
+            },
+            102: {
+                id: "102",
+                name: "green_tick",
+                author_id: 222,
+                deactivated: false,
+                source_url: "/some/path/to/emoji",
             },
         },
     },