test/polynomial_test.rb in polynomials-0.1.4 vs test/polynomial_test.rb in polynomials-0.1.5

@@ -36,19 +36,19 @@
 
   def test_degree
     assert_equal 5,Polynomial.parse('3x^5 - 5 x + 3').degree
   end
 
-  def test_extremums
+  def test_extrema
     polynomial = Polynomial.parse('3x^2 + 2x + 1')
-    assert_equal({ min: Set[-2.0/6.0] }, polynomial.local_extremums)
+    assert_equal({ min: Set[-2.0/6.0] }, polynomial.local_extrema)
     polynomial = Polynomial.parse('5x^3 - 5x^2 + 2x - 2')
   end
 
-  def test_extremums_with_slope_of_derivative_equal_to_zero
+  def test_extrema_with_slope_of_derivative_equal_to_zero
     polynomial = Polynomial.parse('1x^4')
-    assert_equal({ min: Set[0.0] }, polynomial.local_extremums)
-    assert_equal({ max: Set[1.0/0, -1.0/0], min: Set[0.0]}, polynomial.extremums)
+    assert_equal({ min: Set[0.0] }, polynomial.local_extrema)
+    assert_equal({ max: Set[1.0/0, -1.0/0], min: Set[0.0]}, polynomial.extrema)
   end
 
   def test_no_inflection_points
     polynomial = Polynomial.parse('1 x^4')
     assert_equal({ left: Set[-1.0/0..+1.0/0] }, polynomial.curvature_behaviour)