fix linting for tests

__test__/git-auth-helper.test.ts

@@ -417,7 +417,7 @@ describe('git-auth-helper tests', () => {
           `Did not expect file to exist: '${globalGitConfigPath}'`
         )
       } catch (err) {
-        if (err.code !== 'ENOENT') {
+        if ((err as any)?.code !== 'ENOENT') {
           throw err
         }
       }
@@ -601,7 +601,7 @@ describe('git-auth-helper tests', () => {
       await fs.promises.stat(actualKeyPath)
       throw new Error('SSH key should have been deleted')
     } catch (err) {
-      if (err.code !== 'ENOENT') {
+      if ((err as any)?.code !== 'ENOENT') {
         throw err
       }
     }
@@ -611,7 +611,7 @@ describe('git-auth-helper tests', () => {
       await fs.promises.stat(actualKnownHostsPath)
       throw new Error('SSH known hosts should have been deleted')
     } catch (err) {
-      if (err.code !== 'ENOENT') {
+      if ((err as any)?.code !== 'ENOENT') {
         throw err
       }
     }
@@ -658,7 +658,7 @@ describe('git-auth-helper tests', () => {
       await fs.promises.stat(homeOverride)
       throw new Error(`Should have been deleted '${homeOverride}'`)
     } catch (err) {
-      if (err.code !== 'ENOENT') {
+      if ((err as any)?.code !== 'ENOENT') {
         throw err
       }
     }

__test__/ref-helper.test.ts

@@ -16,7 +16,7 @@ describe('ref-helper tests', () => {
       await refHelper.getCheckoutInfo(git, 'refs/heads/my/branch', commit)
       throw new Error('Should not reach here')
     } catch (err) {
-      expect(err.message).toBe('Arg git cannot be empty')
+      expect((err as any)?.message).toBe('Arg git cannot be empty')
     }
   })
 
@@ -25,7 +25,7 @@ describe('ref-helper tests', () => {
       await refHelper.getCheckoutInfo(git, '', '')
       throw new Error('Should not reach here')
     } catch (err) {
-      expect(err.message).toBe('Args ref and commit cannot both be empty')
+      expect((err as any)?.message).toBe('Args ref and commit cannot both be empty')
     }
   })
 
@@ -102,7 +102,7 @@ describe('ref-helper tests', () => {
       await refHelper.getCheckoutInfo(git, 'my-ref', '')
       throw new Error('Should not reach here')
     } catch (err) {
-      expect(err.message).toBe(
+      expect((err as any)?.message).toBe(
         "A branch or tag with the name 'my-ref' could not be found"
       )
     }

__test__/retry-helper.test.ts

@@ -74,7 +74,7 @@ describe('retry-helper tests', () => {
         throw new Error(`some error ${++attempts}`)
       })
     } catch (err) {
-      error = err
+      error = err as Error
     }
     expect(error.message).toBe('some error 3')
     expect(attempts).toBe(3)