Add test for signoff

__test__/create-or-update-branch.int.test.ts

@@ -757,6 +757,69 @@ describe('create-or-update-branch tests', () => {
     ).toBeTruthy()
   })
 
+  it('tests create and update with signoff on commit', async () => {
+    // Create tracked and untracked file changes
+    const changes = await createChanges()
+    const commitMessage = uuidv4()
+    const result = await createOrUpdateBranch(
+      git,
+      commitMessage,
+      '',
+      BRANCH,
+      REMOTE_NAME,
+      true
+    )
+    expect(result.action).toEqual('created')
+    expect(await getFileContent(TRACKED_FILE)).toEqual(changes.tracked)
+    expect(await getFileContent(UNTRACKED_FILE)).toEqual(changes.untracked)
+    expect(
+      await gitLogMatches([commitMessage, INIT_COMMIT_MESSAGE])
+    ).toBeTruthy()
+    // Check signoff in commit body
+    const commitBody = (
+      await git.exec(['log', `-1`, '--format=%b'])
+    ).stdout.trim()
+    expect(commitBody).toEqual(
+      'Signed-off-by: Committer Name <committer@example.com>'
+    )
+
+    // Push pull request branch to remote
+    await git.push([
+      '--force-with-lease',
+      REMOTE_NAME,
+      `HEAD:refs/heads/${BRANCH}`
+    ])
+
+    await afterTest(false)
+    await beforeTest()
+
+    // Create tracked and untracked file changes
+    const _changes = await createChanges()
+    const _commitMessage = uuidv4()
+    const _result = await createOrUpdateBranch(
+      git,
+      _commitMessage,
+      '',
+      BRANCH,
+      REMOTE_NAME,
+      true
+    )
+    expect(_result.action).toEqual('updated')
+    expect(_result.hasDiffWithBase).toBeTruthy()
+    expect(await getFileContent(TRACKED_FILE)).toEqual(_changes.tracked)
+    expect(await getFileContent(UNTRACKED_FILE)).toEqual(_changes.untracked)
+    expect(
+      await gitLogMatches([_commitMessage, INIT_COMMIT_MESSAGE])
+    ).toBeTruthy()
+    // Check signoff in commit body
+    const _commitBody = (
+      await git.exec(['log', `-1`, '--format=%b'])
+    ).stdout.trim()
+    expect(_commitBody).toEqual(
+      'Signed-off-by: Committer Name <committer@example.com>'
+    )
+  })
+
   // Working Base is Not Base (WBNB)
 
   it('tests no changes resulting in no new branch being created (WBNB)', async () => {