Fix a few nits in tests and automation. Don't try to wordcount ls-rem… (#546)

* Fix a few nits in tests and automation. Don't try to wordcount ls-remote.

Nits in tests are around undoing changes made to the environment,
and to not modify the checkout.

* Describe suite with empty SHA

.github/workflows/build.yml

@@ -6,7 +6,7 @@ on:
       - 'releases/v*'
   push:
     branches:
-      - dev
+      - 'dev*'
     tags-ignore:
       - '*.*'
 jobs:

__tests__/git.test.ts

@@ -11,6 +11,10 @@ import fs from 'fs'
 
 const originalAction = JSON.stringify(action)
 
+jest.mock('fs', () => ({
+  existsSync: jest.fn()
+}))
+
 jest.mock('@actions/core', () => ({
   setFailed: jest.fn(),
   getInput: jest.fn(),
@@ -178,6 +182,14 @@ describe('git', () => {
     })
 
     it('should not ignore CNAME or nojekyll if they exist in the deployment folder', async () => {
+      ;(fs.existsSync as jest.Mock)
+        .mockImplementationOnce(() => {
+          return true
+        })
+        .mockImplementationOnce(() => {
+          return true
+        })
+
       Object.assign(action, {
         silent: false,
         folder: 'assets',
@@ -192,18 +204,21 @@ describe('git', () => {
         isTest: TestFlag.HAS_CHANGED_FILES
       })
 
-      fs.createWriteStream('assets/.nojekyll')
-      fs.createWriteStream('assets/CNAME')
-
       const response = await deploy(action)
 
       // Includes the call to generateWorktree
       expect(execute).toBeCalledTimes(11)
       expect(rmRF).toBeCalledTimes(1)
+      expect(fs.existsSync).toBeCalledTimes(2)
       expect(response).toBe(Status.SUCCESS)
     })
 
-    it('should execute commands with clean options, commits sha commit message', async () => {
+    describe('with empty GITHUB_SHA', () => {
+      const oldSha = process.env.GITHUB_SHA
+      afterAll(() => {
+        process.env.GITHUB_SHA = oldSha
+      })
+      it('should execute commands with clean options', async () => {
         process.env.GITHUB_SHA = ''
         Object.assign(action, {
           silent: false,
@@ -227,6 +242,7 @@ describe('git', () => {
         expect(execute).toBeCalledTimes(8)
         expect(rmRF).toBeCalledTimes(1)
       })
+    })
 
     it('should execute commands with clean options stored as an array instead', async () => {
       Object.assign(action, {

src/git.ts

@@ -55,7 +55,7 @@ export async function deploy(action: ActionInterface): Promise<Status> {
     const branchExists =
       action.isTest & TestFlag.HAS_REMOTE_BRANCH ||
       (await execute(
-        `git ls-remote --heads ${action.repositoryPath} ${action.branch} | wc -l`,
+        `git ls-remote --heads ${action.repositoryPath} ${action.branch}`,
         action.workspace,
         action.silent
       ))