def test_pushd(self):
#Function pushd
#Function popd
dp1 = os.getcwd().split('/')
shex.pushd("..")
assert(shex.peek().split('/')==dp1)
dp2 = os.getcwd().split('/')
shex.popd()
dp3 = os.getcwd().split('/')
assert(dp1==dp3)
assert(dp2==dp1[:-1])
def bad_pushd(self):
path = os.getcwd()
shex.pushd("bad/dir")
assert(path==os.getcwd())
