FEATURE: adds plugin sharing api

test/javascripts/lib/sharing-test.js.es6

@@ -0,0 +1,42 @@
+import Sharing from "discourse/lib/sharing";
+
+QUnit.module("lib:sharing", {
+  beforeEach() {
+    Sharing._reset();
+  }
+});
+
+QUnit.test("addSource", assert => {
+  const sharingSettings = "facebook|twitter";
+
+  assert.blank(Sharing.activeSources(sharingSettings));
+
+  Sharing.addSource({
+    id: "facebook"
+  });
+
+  assert.equal(Sharing.activeSources(sharingSettings).length, 1);
+});
+
+QUnit.test("addSharingId", assert => {
+  const sharingSettings = "";
+
+  assert.blank(Sharing.activeSources(sharingSettings));
+
+  Sharing.addSource({
+    id: "new-source"
+  });
+
+  assert.blank(
+    Sharing.activeSources(sharingSettings),
+    "it doesn’t activate a source not in settings"
+  );
+
+  Sharing.addSharingId("new-source");
+
+  assert.equal(
+    Sharing.activeSources(sharingSettings).length,
+    1,
+    "it adds sharing id to existing sharing settings"
+  );
+});