expectedRotate: true,
		},
	}

	for id, tc := range testCases {
		t.Run(id, func(t *testing.T) {
			p := GCEPlugin{
				tokenCache: tc.jwt,
			}
			if rotate := p.shouldRotate(tc.now); rotate != tc.expectedRotate {
				t.Errorf("%s, shouldRotate(%s)=%t, expected %t",
					id, tc.now.String(), rotate, tc.expectedRotate)
			}
		})
	}
}

func creatJWTFile(path string) error {
	if path == "" {
		return nil