analyzable_test.rb in polynomials-0.4.4

- old
+ new

@@ -1,7 +1,6 @@
 require "#{File.dirname(File.expand_path(__FILE__))}/test_helper"
-Infinity = 1.0/0
 class TestAnalyzable < MiniTest::Unit::TestCase
   include Polynomials
 
   def test_local_extrema
     polynomial = Polynomial.parse('3x^2 + 2x + 1')
@@ -58,22 +57,22 @@
     assert_set_eql Set[InflectionPoint.new(-1/10,polynomial.(-1/10)),InflectionPoint.new(0,polynomial.(0))], polynomial.inflection_points
   end
 
   def test_strives_for
     polynomial = Polynomial.new(2,0,0)
-    assert_equal [Infinity,Infinity], polynomial.strives_for
+    assert_equal [Maximum.new(-Infinity,Infinity),Maximum.new(Infinity,Infinity)], polynomial.strives_for
     polynomial = Polynomial.new(-2,0,0)
-    assert_equal [-Infinity,-Infinity], polynomial.strives_for
+    assert_equal [Minimum.new(-Infinity,-Infinity),Minimum.new(Infinity,-Infinity)], polynomial.strives_for
     polynomial = Polynomial.new(2,0,0,0)
-    assert_equal [-Infinity,Infinity], polynomial.strives_for
+    assert_equal [Minimum.new(-Infinity,-Infinity),Maximum.new(Infinity,Infinity)], polynomial.strives_for
     polynomial = Polynomial.new(-2,0,0,0)
-    assert_equal [Infinity,-Infinity], polynomial.strives_for
+    assert_equal [Maximum.new(-Infinity,Infinity),Minimum.new(Infinity,-Infinity)], polynomial.strives_for
     polynomial = Polynomial.new(2)
     assert_equal nil, polynomial.strives_for
 
     polynomial = Polynomial.parse('+ 1.0 x^4 + 5.0 x^3 - 1.0 x^2 + 3.0 x + 5.0').derivative
-    assert_equal [-Infinity,Infinity], polynomial.strives_for
+    assert_equal [Minimum.new(-Infinity,-Infinity),Maximum.new(Infinity,Infinity)], polynomial.strives_for
   end
 
   def test_inflection_points_some_coefficients_of_derivative2_zero
     polynomial = Polynomial.parse('x^5 + x^1')
     assert_set_eql Set[], polynomial.inflection_points
@@ -84,8 +83,8 @@
     assert_equal({ :right => [[-Infinity,0.0]], :left => [[0.0, Infinity]] }, polynomial.curvature_behaviour)
   end
 
   def test_strives_for_no_roots
     polynomial = Polynomial.new(1,0,0,0,0)
-    assert_equal [Infinity,Infinity], polynomial.strives_for
+    assert_equal [Maximum.new(-Infinity,Infinity),Maximum.new(Infinity,Infinity)], polynomial.strives_for
   end
 end