text: """
  Tests for ecdf.py
  
  """
  import unittest
  import numpy as np
  from quantecon import ECDF
  
  
  class TestECDF(unittest.TestCase):
  
      @classmethod
      def setUpClass(cls):
          cls.obs = np.random.rand(40)  # observations defining dist
          cls.ecdf = ECDF(cls.obs)
  
      def test_call_high(self):
          "ecdf: x above all obs give 1.0"
          # all of self.obs <= 1 so ecdf(1.1) should be 1
          self.assertAlmostEqual(self.ecdf(1.1), 1.0)
  
      def test_call_low(self):
          "ecdf: x below all obs give 0.0"
          # all of self.obs <= 1 so ecdf(1.1) should be 1
          self.assertAlmostEqual(self.ecdf(-0.1), 0.0)
  
      def test_ascending(self):
          "ecdf: larger values should return F(x) at least as big"
          x = np.random.rand()
          F_1 = self.ecdf(x)
          F_2 = self.ecdf(1.1 * x)
          self.assertGreaterEqual(F_2, F_1)
  
      def test_vectorized(self):
          "ecdf: testing vectorized __call__ method"
          t = np.linspace(-1, 1, 100)
          e = self.ecdf(t)
          self.assertEqual(t.shape, e.shape)
          self.assertEqual(e.dtype, float)
          t = np.linspace(-1, 1, 100).reshape(2, 2, 25)
          e = self.ecdf(t)
          self.assertEqual(t.shape, e.shape)
          self.assertEqual(e.dtype, float)
  