fix(azure): Separate API call for the reopening PR state (#7050)

Co-authored-by: Jamie Magee <JamieMagee@users.noreply.github.com>

lib/platform/azure/__snapshots__/index.spec.ts.snap

@@ -188,6 +188,26 @@ Array [
 ]
 `;
 
+exports[`platform/azure updatePr(prNo, title, body) should reopen the PR 1`] = `
+Array [
+  Array [
+    Object {
+      "status": 1,
+    },
+    "1",
+    1234,
+  ],
+  Array [
+    Object {
+      "description": undefined,
+      "title": "The New Title",
+    },
+    "1",
+    1234,
+  ],
+]
+`;
+
 exports[`platform/azure updatePr(prNo, title, body) should update the PR 1`] = `
 Array [
   Array [

lib/platform/azure/index.spec.ts

@@ -631,6 +631,24 @@ describe('platform/azure', () => {
       });
       expect(updatePullRequest.mock.calls).toMatchSnapshot();
     });
+
+    it('should reopen the PR', async () => {
+      await initRepo({ repository: 'some/repo' });
+      const updatePullRequest = jest.fn();
+      azureApi.gitApi.mockImplementationOnce(
+        () =>
+          ({
+            updatePullRequest,
+          } as any)
+      );
+      await azure.updatePr({
+        number: 1234,
+        prTitle: 'The New Title',
+        prBody: 'Hello world again',
+        state: PrState.Open,
+      });
+      expect(updatePullRequest.mock.calls).toMatchSnapshot();
+    });
   });
 
   describe('ensureComment', () => {

lib/platform/azure/index.ts

@@ -373,21 +373,25 @@ export async function updatePr({
 }: UpdatePrConfig): Promise<void> {
   logger.debug(`updatePr(${prNo}, ${title}, body)`);
 
-  const status = {
-    [PrState.Open]: PullRequestStatus.Active,
-    [PrState.Closed]: PullRequestStatus.Abandoned,
-  }[state];
-
   const azureApiGit = await azureApi.gitApi();
   const objToUpdate: GitPullRequest = {
     title,
-    ...(status && { status }),
   };
 
   if (body) {
     objToUpdate.description = azureHelper.max4000Chars(sanitize(body));
   }
 
+  if (state === PrState.Open) {
+    await azureApiGit.updatePullRequest(
+      { status: PullRequestStatus.Active },
+      config.repoId,
+      prNo
+    );
+  } else if (state === PrState.Closed) {
+    objToUpdate.status = PullRequestStatus.Abandoned;
+  }
+
   await azureApiGit.updatePullRequest(objToUpdate, config.repoId, prNo);
 }