chore: fix opts test if test env has askpass or ssh command

Author: lukekarrys

test/opts.js

@@ -1,14 +1,22 @@
 const t = require('tap')
 const gitOpts = require('../lib/opts.js')
-const gitEnv = {
-  GIT_ASKPASS: 'echo',
-  GIT_SSH_COMMAND: 'ssh -oStrictHostKeyChecking=accept-new',
-}
 
-t.match(gitOpts().env, gitEnv, 'got the git defaults we want')
-
-t.equal(gitOpts().shell, false, 'shell defaults to false')
-t.equal(gitOpts({ shell: '/bin/bash' }).shell, false, 'shell cannot be overridden')
+t.test('defaults', t => {
+  const { GIT_ASKPASS, GIT_SSH_COMMAND } = process.env
+  t.teardown(() => {
+    process.env.GIT_ASKPASS = GIT_ASKPASS
+    process.env.GIT_SSH_COMMAND = GIT_SSH_COMMAND
+  })
+  delete process.env.GIT_ASKPASS
+  delete process.env.GIT_SSH_COMMAND
+  t.match(gitOpts().env, {
+    GIT_ASKPASS: 'echo',
+    GIT_SSH_COMMAND: 'ssh -oStrictHostKeyChecking=accept-new',
+  }, 'got the git defaults we want')
+  t.equal(gitOpts().shell, false, 'shell defaults to false')
+  t.equal(gitOpts({ shell: '/bin/bash' }).shell, false, 'shell cannot be overridden')
+  t.end()
+})
 
 t.test('does not override', t => {
   const { GIT_ASKPASS, GIT_SSH_COMMAND } = process.env