old_contents: from lexos.processors.analyze.topword import _z_test_
  
  
  class TestZTest:
      def test_normal_case(self):
          assert round(_z_test_(p1=0.1, pt=0.3, n1=100, nt=10000), 2) == -4.35
  
      def test_special_case(self):
          assert _z_test_(p1=0.1, pt=0.3, n1=0, nt=0) == "Insignificant"
          assert _z_test_(p1=0.1, pt=0.3, n1=100, nt=0) == "Insignificant"
          assert _z_test_(p1=0.1, pt=0.3, n1=0, nt=100) == "Insignificant"
  
  
new_contents: from lexos.processors.analyze.topword import _z_test_
  
  
  class TestZTest:
      def test_normal_case(self):
          assert round(_z_test_(p1=0.1, pt=0.3, n1=100, nt=10000), 2) == -4.35
          assert round(_z_test_(p1=0.3, pt=0.1, n1=100, nt=100), 2) == 3.54
  
      def test_special_case(self):
          assert _z_test_(p1=0.1, pt=0.3, n1=0, nt=0) == "Insignificant"
          assert _z_test_(p1=0.1, pt=0.3, n1=100, nt=0) == "Insignificant"
          assert _z_test_(p1=0.1, pt=0.3, n1=0, nt=100) == "Insignificant"
  
  
subject: Add more test