mirror of
https://github.com/ruby/ruby.git
synced 2022-11-09 12:17:21 -05:00
95e8c48dd3
* 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
139 lines
3.4 KiB
Ruby
139 lines
3.4 KiB
Ruby
require File.expand_path('../../../spec_helper', __FILE__)
|
|
require File.expand_path('../fixtures/classes', __FILE__)
|
|
|
|
describe "Kernel.rand" do
|
|
it "is a private method" do
|
|
Kernel.should have_private_instance_method(:rand)
|
|
end
|
|
|
|
it "returns a float if no argument is passed" do
|
|
rand.should be_kind_of(Float)
|
|
end
|
|
|
|
it "returns an integer for an integer argument" do
|
|
rand(77).should be_kind_of(Integer)
|
|
end
|
|
|
|
it "returns an integer for a float argument greater than 1" do
|
|
rand(1.3).should be_kind_of(Integer)
|
|
end
|
|
|
|
it "returns a float for an argument between -1 and 1" do
|
|
rand(-0.999).should be_kind_of(Float)
|
|
rand(-0.01).should be_kind_of(Float)
|
|
rand(0).should be_kind_of(Float)
|
|
rand(0.01).should be_kind_of(Float)
|
|
rand(0.999).should be_kind_of(Float)
|
|
end
|
|
|
|
it "ignores the sign of the argument" do
|
|
[0, 1, 2, 3].should include(rand(-4))
|
|
end
|
|
|
|
it "never returns a value greater or equal to 1.0 with no arguments" do
|
|
1000.times do
|
|
(0...1.0).should include(rand)
|
|
end
|
|
end
|
|
|
|
it "never returns a value greater or equal to any passed in max argument" do
|
|
1000.times do
|
|
(0...100).to_a.should include(rand(100))
|
|
end
|
|
end
|
|
|
|
it "calls to_int on its argument" do
|
|
l = mock('limit')
|
|
l.should_receive(:to_int).and_return 7
|
|
|
|
rand l
|
|
end
|
|
|
|
context "given an exclusive range" do
|
|
it "returns an Integer between the two Integers" do
|
|
1000.times do
|
|
x = rand(4...6)
|
|
x.should be_kind_of(Integer)
|
|
(4...6).should include(x)
|
|
end
|
|
end
|
|
|
|
it "returns a Float between the given Integer and Float" do
|
|
1000.times do
|
|
x = rand(4...6.5)
|
|
x.should be_kind_of(Float)
|
|
(4...6.5).should include(x)
|
|
end
|
|
end
|
|
|
|
it "returns a Float between the given Float and Integer" do
|
|
1000.times do
|
|
x = rand(3.5...6)
|
|
x.should be_kind_of(Float)
|
|
(3.5...6).should include(x)
|
|
end
|
|
end
|
|
|
|
it "returns a Float between the two given Floats" do
|
|
1000.times do
|
|
x = rand(3.5...6.5)
|
|
x.should be_kind_of(Float)
|
|
(3.5...6.5).should include(x)
|
|
end
|
|
end
|
|
end
|
|
|
|
context "given an inclusive range" do
|
|
it "returns an Integer between the two Integers" do
|
|
1000.times do
|
|
x = rand(4..6)
|
|
x.should be_kind_of(Integer)
|
|
(4..6).should include(x)
|
|
end
|
|
end
|
|
|
|
it "returns a Float between the given Integer and Float" do
|
|
1000.times do
|
|
x = rand(4..6.5)
|
|
x.should be_kind_of(Float)
|
|
(4..6.5).should include(x)
|
|
end
|
|
end
|
|
|
|
it "returns a Float between the given Float and Integer" do
|
|
1000.times do
|
|
x = rand(3.5..6)
|
|
x.should be_kind_of(Float)
|
|
(3.5..6).should include(x)
|
|
end
|
|
end
|
|
|
|
it "returns a Float between the two given Floats" do
|
|
1000.times do
|
|
x = rand(3.5..6.5)
|
|
x.should be_kind_of(Float)
|
|
(3.5..6.5).should include(x)
|
|
end
|
|
end
|
|
end
|
|
|
|
it "returns a numeric for an range argument where max is < 1" do
|
|
rand(0.25..0.75).should be_kind_of(Numeric)
|
|
end
|
|
|
|
it "returns nil when range is backwards" do
|
|
rand(1..0).should be_nil
|
|
end
|
|
|
|
it "returns the range start/end when Float range is 0" do
|
|
rand(1.0..1.0).should eql(1.0)
|
|
end
|
|
|
|
it "returns the range start/end when Integer range is 0" do
|
|
rand(42..42).should eql(42)
|
|
end
|
|
end
|
|
|
|
describe "Kernel#rand" do
|
|
it "needs to be reviewed for spec completeness"
|
|
end
|