Allow embedding of GitLab snippets (#6217)

shared/editor/embeds/GitLabSnippet.test.ts

@@ -0,0 +1,31 @@
+import GitLabSnippet from "./GitLabSnippet";
+
+describe("GitLabSnippet", () => {
+  const match = GitLabSnippet.ENABLED[0];
+
+  test("to be enabled on snippet link", () => {
+    expect("https://gitlab.com/-/snippets/1234".match(match)).toBeTruthy();
+    expect(
+      "https://gitlab.com/gitlab-org/gitlab/-/snippets/2256824".match(match)
+    ).toBeTruthy();
+    expect(
+      "https://gitlab.com/group/project/sub-project/sub-sub-project/test/-/snippets/9876".match(
+        match
+      )
+    ).toBeTruthy();
+  });
+
+  test("to not be enabled elsewhere", () => {
+    expect("https://gitlab.com".match(match)).toBe(null);
+    expect("https://gitlab.com/gitlab-org".match(match)).toBe(null);
+    expect("https://gitlab.com/gitlab-org/gitlab".match(match)).toBe(null);
+    expect("https://gitlab.com/gitlab-org/gitlab/-/issues".match(match)).toBe(
+      null
+    );
+    expect(
+      "https://gitlab.com/gitlab-org/gitlab/-/merge_requests/137948".match(
+        match
+      )
+    ).toBe(null);
+  });
+});