Add a new fixture and test for the branch checking

__mocks__/@actions/github.ts

@@ -8,6 +8,7 @@ export const context = {
     owner: "monalisa",
     repo: "helloworld",
   },
+  ref: "test/testing-time",
 };
 
 const mockApi = {

__tests__/fixtures/branches.yml

@@ -0,0 +1,5 @@
+test-branch:
+  - branch: "test/*"
+
+feature-branch:
+  - branch: "*/feature/*"

__tests__/main.test.ts

@@ -15,6 +15,7 @@ const paginateMock = jest.spyOn(gh, "paginate");
 const getPullMock = jest.spyOn(gh.rest.pulls, "get");
 
 const yamlFixtures = {
+  "branches.yml": fs.readFileSync("__tests__/fixtures/branches.yml"),
   "only_pdfs.yml": fs.readFileSync("__tests__/fixtures/only_pdfs.yml"),
 };
 
@@ -102,6 +103,19 @@ describe("run", () => {
     expect(addLabelsMock).toHaveBeenCalledTimes(0);
     expect(removeLabelMock).toHaveBeenCalledTimes(0);
   });
+
+  it("adds labels based on the branch names that match the glob pattern", async () => {
+    usingLabelerConfigYaml("branches.yml");
+    await run();
+
+    expect(addLabelsMock).toHaveBeenCalledTimes(1);
+    expect(addLabelsMock).toHaveBeenCalledWith({
+      owner: "monalisa",
+      repo: "helloworld",
+      issue_number: 123,
+      labels: ["test-branch"],
+    });
+  });
 });
 
 function usingLabelerConfigYaml(fixtureName: keyof typeof yamlFixtures): void {