From a635de7dcbc14a1f59fbcf07122c6bce1fb21673 Mon Sep 17 00:00:00 2001 From: naruse Date: Wed, 5 Oct 2011 07:35:27 +0000 Subject: * numeric.c (ruby_float_step): improve floating point calculations. [ruby-core:35753] [Bug #4576] * numeric.c (ruby_float_step): correct the error of floating point numbers on the excluding case. patched by Masahiro Tanaka [ruby-core:39608] * numeric.c (ruby_float_step): use the end value when the current value is greater than or equal to the end value. patched by Akira Tanaka [ruby-core:39612] git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@33407 b2dd03c8-39d4-4d8f-98ff-823fe69b080e --- test/ruby/test_float.rb | 31 +++++++++++++++++++++++++++++++ 1 file changed, 31 insertions(+) (limited to 'test/ruby/test_float.rb') diff --git a/test/ruby/test_float.rb b/test/ruby/test_float.rb index e77b9e62e0..531ff04fd6 100644 --- a/test/ruby/test_float.rb +++ b/test/ruby/test_float.rb @@ -508,4 +508,35 @@ class TestFloat < Test::Unit::TestCase sleep(0.1+0.1+0.1+0.1+0.1+0.1+0.1+0.1+0.1+0.1) end end + + def test_step + 1000.times do + a = rand + b = a+rand*1000 + s = (b - a) / 10 + assert_equal(11, (a..b).step(s).to_a.length) + end + + assert_equal(11, (1.0..(1.0+1E-15)).step(1E-16).to_a.length) + + (1.0..12.7).step(1.3).each do |n| + assert_operator(n, :<=, 12.7) + end + end + + def test_step_excl + 1000.times do + a = rand + b = a+rand*1000 + s = (b - a) / 10 + assert_equal(10, (a...b).step(s).to_a.length) + end + + assert_equal([1.0, 2.9, 4.8, 6.699999999999999], (1.0...6.8).step(1.9).to_a) + + e = 1+1E-12 + (1.0 ... e).step(1E-16) do |n| + assert_operator(n, :<, e) + end + end end -- cgit v1.2.3