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author | eregon <eregon@b2dd03c8-39d4-4d8f-98ff-823fe69b080e> | 2017-05-07 12:04:49 +0000 |
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committer | eregon <eregon@b2dd03c8-39d4-4d8f-98ff-823fe69b080e> | 2017-05-07 12:04:49 +0000 |
commit | a3736e97a6ca517c2cd7d3d93a8f2ef86e39e5b5 (patch) | |
tree | 9eef7f720314ebaff56845a74e203770e62284e4 /spec/rubyspec/library/prime/prime_spec.rb | |
parent | 52df1d0d3370919711c0577aaa42d1a864709885 (diff) | |
download | ruby-a3736e97a6ca517c2cd7d3d93a8f2ef86e39e5b5.tar.gz |
Add in-tree mspec and ruby/spec
* For easier modifications of ruby/spec by MRI developers.
* .gitignore: track changes under spec.
* spec/mspec, spec/rubyspec: add in-tree mspec and ruby/spec.
These files can therefore be updated like any other file in MRI.
Instructions are provided in spec/README.
[Feature #13156] [ruby-core:79246]
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@58595 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
Diffstat (limited to 'spec/rubyspec/library/prime/prime_spec.rb')
-rw-r--r-- | spec/rubyspec/library/prime/prime_spec.rb | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/spec/rubyspec/library/prime/prime_spec.rb b/spec/rubyspec/library/prime/prime_spec.rb new file mode 100644 index 0000000000..7a41496f7f --- /dev/null +++ b/spec/rubyspec/library/prime/prime_spec.rb @@ -0,0 +1,17 @@ +require File.expand_path('../../../spec_helper', __FILE__) +require 'prime' + +describe "Prime#prime?" do + it "returns a true value for prime numbers" do + Prime.prime?(2).should be_true + Prime.prime?(3).should be_true + Prime.prime?(2**31-1).should be_true # 8th Mersenne prime (M8) + end + + it "returns a false value for composite numbers" do + Prime.prime?(4).should be_false + Prime.prime?(15).should be_false + Prime.prime?(2**32-1).should be_false + Prime.prime?( (2**17-1)*(2**19-1) ).should be_false # M6*M7 + end +end |