# Prefer local library over installed version.
$:.unshift( File.join( File.dirname(__FILE__), "..", "lib" ) )
require 'rebirth'
include Rebirth
describe "Numeric#nearly_equal?" do
it "should be true if within the threshold" do
(0.4).should be_nearly_equal(0.41, 0.02)
end
it "should be false if outside the threshold" do
(0.4).should_not be_nearly_equal(0.43, 0.02)
end
it "should be commutative" do
(0.40).should_not be_nearly_equal(0.43, 0.02)
(0.43).should_not be_nearly_equal(0.40, 0.02)
end
it "should work with two Floats" do
(1.0).should be_nearly_equal(1.01, 0.02)
end
it "should work with two integers" do
(1).should be_nearly_equal(2, 2)
end
it "should work with a Float and an integer" do
(1.01).should be_nearly_equal(1, 0.02)
end
it "should work with an integer and a Float" do
(1).should be_nearly_equal(1.01, 0.02)
end
it "should have a very small default threshold" do
(1.0000000000001).should be_nearly_equal(1.0000000000002)
end
it "should work with negative numbers" do
(-0.40).should_not be_nearly_equal(-0.43, 0.02)
(-0.43).should_not be_nearly_equal(-0.40, 0.02)
end
end
describe "Numeric#to_deg" do
it "should multiply the number by 180/pi" do
-10.step(10, 0.2) do |n|
n.to_deg.should be_nearly_equal( n * 180/Math::PI )
end
end
end
describe "Numeric#to_rad" do
it "should multiply the number by pi/180" do
-10.step(10, 0.2) do |n|
n.to_rad.should be_nearly_equal( n * Math::PI/180 )
end
end
end
