kotovalexarian-likes-github/ruby--ruby
1
0
Fork 0
mirror of https://github.com/ruby/ruby.git synced 2022-11-09 12:17:21 -05:00
Code Releases Activity
ruby--ruby/spec/ruby/core/range/step_spec.rb
Benoit Daloze 809f0b8a13 Update to ruby/spec@f8a2d54
2020-01-28 20:47:48 +01:00

493 lines
18 KiB
Ruby
Raw Blame History

require_relative '../../spec_helper'
describe "Range#step" do
before :each do
ScratchPad.record []
end
it "returns self" do
r = 1..2
r.step { }.should equal(r)
end
it "raises TypeError if step" do
obj = mock("mock")
-> { (1..10).step(obj) { } }.should raise_error(TypeError)
end
it "calls #to_int to coerce step to an Integer" do
obj = mock("Range#step")
obj.should_receive(:to_int).and_return(1)
(1..2).step(obj) { |x| ScratchPad << x }
ScratchPad.recorded.should eql([1, 2])
end
it "raises a TypeError if step does not respond to #to_int" do
obj = mock("Range#step non-integer")
-> { (1..2).step(obj) { } }.should raise_error(TypeError)
end
it "raises a TypeError if #to_int does not return an Integer" do
obj = mock("Range#step non-integer")
obj.should_receive(:to_int).and_return("1")
-> { (1..2).step(obj) { } }.should raise_error(TypeError)
end
it "coerces the argument to integer by invoking to_int" do
(obj = mock("2")).should_receive(:to_int).and_return(2)
res = []
(1..10).step(obj) {|x| res << x}
res.should == [1, 3, 5, 7, 9]
end
it "raises a TypeError if the first element does not respond to #succ" do
obj = mock("Range#step non-comparable")
obj.should_receive(:<=>).with(obj).and_return(1)
-> { (obj..obj).step { |x| x } }.should raise_error(TypeError)
end
it "raises an ArgumentError if step is 0" do
-> { (-1..1).step(0) { |x| x } }.should raise_error(ArgumentError)
end
it "raises an ArgumentError if step is 0.0" do
-> { (-1..1).step(0.0) { |x| x } }.should raise_error(ArgumentError)
end
it "raises an ArgumentError if step is negative" do
-> { (-1..1).step(-2) { |x| x } }.should raise_error(ArgumentError)
end
describe "with inclusive end" do
describe "and Integer values" do
it "yields Integer values incremented by 1 and less than or equal to end when not passed a step" do
(-2..2).step { |x| ScratchPad << x }
ScratchPad.recorded.should eql([-2, -1, 0, 1, 2])
end
it "yields Integer values incremented by an Integer step" do
(-5..5).step(2) { |x| ScratchPad << x }
ScratchPad.recorded.should eql([-5, -3, -1, 1, 3, 5])
end
it "yields Float values incremented by a Float step" do
(-2..2).step(1.5) { |x| ScratchPad << x }
ScratchPad.recorded.should eql([-2.0, -0.5, 1.0])
end
end
describe "and Float values" do
it "yields Float values incremented by 1 and less than or equal to end when not passed a step" do
(-2.0..2.0).step { |x| ScratchPad << x }
ScratchPad.recorded.should eql([-2.0, -1.0, 0.0, 1.0, 2.0])
end
it "yields Float values incremented by an Integer step" do
(-5.0..5.0).step(2) { |x| ScratchPad << x }
ScratchPad.recorded.should eql([-5.0, -3.0, -1.0, 1.0, 3.0, 5.0])
end
it "yields Float values incremented by a Float step" do
(-1.0..1.0).step(0.5) { |x| ScratchPad << x }
ScratchPad.recorded.should eql([-1.0, -0.5, 0.0, 0.5, 1.0])
end
it "returns Float values of 'step * n + begin <= end'" do
(1.0..6.4).step(1.8) { |x| ScratchPad << x }
(1.0..12.7).step(1.3) { |x| ScratchPad << x }
ScratchPad.recorded.should eql([1.0, 2.8, 4.6, 6.4, 1.0, 2.3, 3.6,
4.9, 6.2, 7.5, 8.8, 10.1, 11.4, 12.7])
end
it "handles infinite values at either end" do
(-Float::INFINITY..0.0).step(2) { |x| ScratchPad << x; break if ScratchPad.recorded.size == 3 }
ScratchPad.recorded.should eql([-Float::INFINITY, -Float::INFINITY, -Float::INFINITY])
ScratchPad.record []
(0.0..Float::INFINITY).step(2) { |x| ScratchPad << x; break if ScratchPad.recorded.size == 3 }
ScratchPad.recorded.should eql([0.0, 2.0, 4.0])
end
end
describe "and Integer, Float values" do
it "yields Float values incremented by 1 and less than or equal to end when not passed a step" do
(-2..2.0).step { |x| ScratchPad << x }
ScratchPad.recorded.should eql([-2.0, -1.0, 0.0, 1.0, 2.0])
end
it "yields Float values incremented by an Integer step" do
(-5..5.0).step(2) { |x| ScratchPad << x }
ScratchPad.recorded.should eql([-5.0, -3.0, -1.0, 1.0, 3.0, 5.0])
end
it "yields Float values incremented by a Float step" do
(-1..1.0).step(0.5) { |x| ScratchPad << x }
ScratchPad.recorded.should eql([-1.0, -0.5, 0.0, 0.5, 1.0])
end
end
describe "and Float, Integer values" do
it "yields Float values incremented by 1 and less than or equal to end when not passed a step" do
(-2.0..2).step { |x| ScratchPad << x }
ScratchPad.recorded.should eql([-2.0, -1.0, 0.0, 1.0, 2.0])
end
it "yields Float values incremented by an Integer step" do
(-5.0..5).step(2) { |x| ScratchPad << x }
ScratchPad.recorded.should eql([-5.0, -3.0, -1.0, 1.0, 3.0, 5.0])
end
it "yields Float values incremented by a Float step" do
(-1.0..1).step(0.5) { |x| ScratchPad << x }
ScratchPad.recorded.should eql([-1.0, -0.5, 0.0, 0.5, 1.0])
end
end
describe "and String values" do
it "yields String values incremented by #succ and less than or equal to end when not passed a step" do
("A".."E").step { |x| ScratchPad << x }
ScratchPad.recorded.should == ["A", "B", "C", "D", "E"]
end
it "yields String values incremented by #succ called Integer step times" do
("A".."G").step(2) { |x| ScratchPad << x }
ScratchPad.recorded.should == ["A", "C", "E", "G"]
end
it "raises a TypeError when passed a Float step" do
-> { ("A".."G").step(2.0) { } }.should raise_error(TypeError)
end
it "calls #succ on begin and each element returned by #succ" do
obj = mock("Range#step String start")
obj.should_receive(:<=>).exactly(3).times.and_return(-1, -1, -1, 0)
obj.should_receive(:succ).exactly(2).times.and_return(obj)
(obj..obj).step { |x| ScratchPad << x }
ScratchPad.recorded.should == [obj, obj, obj]
end
end
end
describe "with exclusive end" do
describe "and Integer values" do
it "yields Integer values incremented by 1 and less than end when not passed a step" do
(-2...2).step { |x| ScratchPad << x }
ScratchPad.recorded.should eql([-2, -1, 0, 1])
end
it "yields Integer values incremented by an Integer step" do
(-5...5).step(2) { |x| ScratchPad << x }
ScratchPad.recorded.should eql([-5, -3, -1, 1, 3])
end
it "yields Float values incremented by a Float step" do
(-2...2).step(1.5) { |x| ScratchPad << x }
ScratchPad.recorded.should eql([-2.0, -0.5, 1.0])
end
end
describe "and Float values" do
it "yields Float values incremented by 1 and less than end when not passed a step" do
(-2.0...2.0).step { |x| ScratchPad << x }
ScratchPad.recorded.should eql([-2.0, -1.0, 0.0, 1.0])
end
it "yields Float values incremented by an Integer step" do
(-5.0...5.0).step(2) { |x| ScratchPad << x }
ScratchPad.recorded.should eql([-5.0, -3.0, -1.0, 1.0, 3.0])
end
it "yields Float values incremented by a Float step" do
(-1.0...1.0).step(0.5) { |x| ScratchPad << x }
ScratchPad.recorded.should eql([-1.0, -0.5, 0.0, 0.5])
end
it "returns Float values of 'step * n + begin < end'" do
(1.0...6.4).step(1.8) { |x| ScratchPad << x }
(1.0...55.6).step(18.2) { |x| ScratchPad << x }
ScratchPad.recorded.should eql([1.0, 2.8, 4.6, 1.0, 19.2, 37.4])
end
it "handles infinite values at either end" do
(-Float::INFINITY...0.0).step(2) { |x| ScratchPad << x; break if ScratchPad.recorded.size == 3 }
ScratchPad.recorded.should eql([-Float::INFINITY, -Float::INFINITY, -Float::INFINITY])
ScratchPad.record []
(0.0...Float::INFINITY).step(2) { |x| ScratchPad << x; break if ScratchPad.recorded.size == 3 }
ScratchPad.recorded.should eql([0.0, 2.0, 4.0])
end
end
describe "and Integer, Float values" do
it "yields Float values incremented by 1 and less than end when not passed a step" do
(-2...2.0).step { |x| ScratchPad << x }
ScratchPad.recorded.should eql([-2.0, -1.0, 0.0, 1.0])
end
it "yields Float values incremented by an Integer step" do
(-5...5.0).step(2) { |x| ScratchPad << x }
ScratchPad.recorded.should eql([-5.0, -3.0, -1.0, 1.0, 3.0])
end
it "yields an Float and then Float values incremented by a Float step" do
(-1...1.0).step(0.5) { |x| ScratchPad << x }
ScratchPad.recorded.should eql([-1.0, -0.5, 0.0, 0.5])
end
end
describe "and Float, Integer values" do
it "yields Float values incremented by 1 and less than end when not passed a step" do
(-2.0...2).step { |x| ScratchPad << x }
ScratchPad.recorded.should eql([-2.0, -1.0, 0.0, 1.0])
end
it "yields Float values incremented by an Integer step" do
(-5.0...5).step(2) { |x| ScratchPad << x }
ScratchPad.recorded.should eql([-5.0, -3.0, -1.0, 1.0, 3.0])
end
it "yields Float values incremented by a Float step" do
(-1.0...1).step(0.5) { |x| ScratchPad << x }
ScratchPad.recorded.should eql([-1.0, -0.5, 0.0, 0.5])
end
end
describe "and String values" do
it "yields String values incremented by #succ and less than or equal to end when not passed a step" do
("A"..."E").step { |x| ScratchPad << x }
ScratchPad.recorded.should == ["A", "B", "C", "D"]
end
it "yields String values incremented by #succ called Integer step times" do
("A"..."G").step(2) { |x| ScratchPad << x }
ScratchPad.recorded.should == ["A", "C", "E"]
end
it "raises a TypeError when passed a Float step" do
-> { ("A"..."G").step(2.0) { } }.should raise_error(TypeError)
end
end
end
ruby_version_is "2.6" do
describe "with an endless range" do
describe "and Integer values" do
it "yield Integer values incremented by 1 when not passed a step" do
eval("(-2..)").step { |x| break if x > 2; ScratchPad << x }
ScratchPad.recorded.should eql([-2, -1, 0, 1, 2])
ScratchPad.record []
eval("(-2...)").step { |x| break if x > 2; ScratchPad << x }
ScratchPad.recorded.should eql([-2, -1, 0, 1, 2])
end
it "yields Integer values incremented by an Integer step" do
eval("(-5..)").step(2) { |x| break if x > 3; ScratchPad << x }
ScratchPad.recorded.should eql([-5, -3, -1, 1, 3])
ScratchPad.record []
eval("(-5...)").step(2) { |x| break if x > 3; ScratchPad << x }
ScratchPad.recorded.should eql([-5, -3, -1, 1, 3])
end
it "yields Float values incremented by a Float step" do
eval("(-2..)").step(1.5) { |x| break if x > 1.0; ScratchPad << x }
ScratchPad.recorded.should eql([-2.0, -0.5, 1.0])\
ScratchPad.record []
eval("(-2..)").step(1.5) { |x| break if x > 1.0; ScratchPad << x }
ScratchPad.recorded.should eql([-2.0, -0.5, 1.0])
end
end
describe "and Float values" do
it "yields Float values incremented by 1 and less than end when not passed a step" do
eval("(-2.0..)").step { |x| break if x > 1.5; ScratchPad << x }
ScratchPad.recorded.should eql([-2.0, -1.0, 0.0, 1.0])
ScratchPad.record []
eval("(-2.0...)").step { |x| break if x > 1.5; ScratchPad << x }
ScratchPad.recorded.should eql([-2.0, -1.0, 0.0, 1.0])
end
it "yields Float values incremented by an Integer step" do
eval("(-5.0..)").step(2) { |x| break if x > 3.5; ScratchPad << x }
ScratchPad.recorded.should eql([-5.0, -3.0, -1.0, 1.0, 3.0])
ScratchPad.record []
eval("(-5.0...)").step(2) { |x| break if x > 3.5; ScratchPad << x }
ScratchPad.recorded.should eql([-5.0, -3.0, -1.0, 1.0, 3.0])
end
it "yields Float values incremented by a Float step" do
eval("(-1.0..)").step(0.5) { |x| break if x > 0.6; ScratchPad << x }
ScratchPad.recorded.should eql([-1.0, -0.5, 0.0, 0.5])
ScratchPad.record []
eval("(-1.0...)").step(0.5) { |x| break if x > 0.6; ScratchPad << x }
ScratchPad.recorded.should eql([-1.0, -0.5, 0.0, 0.5])
end
it "handles infinite values at the start" do
eval("(-Float::INFINITY..)").step(2) { |x| ScratchPad << x; break if ScratchPad.recorded.size == 3 }
ScratchPad.recorded.should eql([-Float::INFINITY, -Float::INFINITY, -Float::INFINITY])
ScratchPad.record []
eval("(-Float::INFINITY...)").step(2) { |x| ScratchPad << x; break if ScratchPad.recorded.size == 3 }
ScratchPad.recorded.should eql([-Float::INFINITY, -Float::INFINITY, -Float::INFINITY])
end
end
describe "and String values" do
it "yields String values incremented by #succ and less than or equal to end when not passed a step" do
eval("('A'..)").step { |x| break if x > "D"; ScratchPad << x }
ScratchPad.recorded.should == ["A", "B", "C", "D"]
ScratchPad.record []
eval("('A'...)").step { |x| break if x > "D"; ScratchPad << x }
ScratchPad.recorded.should == ["A", "B", "C", "D"]
end
it "yields String values incremented by #succ called Integer step times" do
eval("('A'..)").step(2) { |x| break if x > "F"; ScratchPad << x }
ScratchPad.recorded.should == ["A", "C", "E"]
ScratchPad.record []
eval("('A'...)").step(2) { |x| break if x > "F"; ScratchPad << x }
ScratchPad.recorded.should == ["A", "C", "E"]
end
it "raises a TypeError when passed a Float step" do
-> { eval("('A'..)").step(2.0) { } }.should raise_error(TypeError)
-> { eval("('A'...)").step(2.0) { } }.should raise_error(TypeError)
end
end
end
end
describe "when no block is given" do
describe "returned Enumerator" do
describe "size" do
it "raises a TypeError if step does not respond to #to_int" do
obj = mock("Range#step non-integer")
enum = (1..2).step(obj)
-> { enum.size }.should raise_error(TypeError)
end
it "raises a TypeError if #to_int does not return an Integer" do
obj = mock("Range#step non-integer")
obj.should_receive(:to_int).and_return("1")
enum = (1..2).step(obj)
-> { enum.size }.should raise_error(TypeError)
end
ruby_version_is ""..."2.6" do
it "raises an ArgumentError if step is 0" do
enum = (-1..1).step(0)
-> { enum.size }.should raise_error(ArgumentError)
end
it "raises an ArgumentError if step is 0.0" do
enum = (-1..1).step(0.0)
-> { enum.size }.should raise_error(ArgumentError)
end
it "raises an ArgumentError if step is negative" do
enum = (-1..1).step(-2)
-> { enum.size }.should raise_error(ArgumentError)
end
end
ruby_version_is "2.6" do
it "returns Float::INFINITY for zero step" do
(-1..1).step(0).size.should == Float::INFINITY
(-1..1).step(0.0).size.should == Float::INFINITY
end
end
it "returns the ceil of range size divided by the number of steps" do
(1..10).step(4).size.should == 3
(1..10).step(3).size.should == 4
(1..10).step(2).size.should == 5
(1..10).step(1).size.should == 10
(-5..5).step(2).size.should == 6
(1...10).step(4).size.should == 3
(1...10).step(3).size.should == 3
(1...10).step(2).size.should == 5
(1...10).step(1).size.should == 9
(-5...5).step(2).size.should == 5
end
ruby_version_is "2.6" do
it "returns the ceil of range size divided by the number of steps even if step is negative" do
(-1..1).step(-1).size.should == 0
(1..-1).step(-1).size.should == 3
end
end
it "returns the correct number of steps when one of the arguments is a float" do
(-1..1.0).step(0.5).size.should == 5
(-1.0...1.0).step(0.5).size.should == 4
end
it "returns the range size when there's no step_size" do
(-2..2).step.size.should == 5
(-2.0..2.0).step.size.should == 5
(-2..2.0).step.size.should == 5
(-2.0..2).step.size.should == 5
(1.0..6.4).step(1.8).size.should == 4
(1.0..12.7).step(1.3).size.should == 10
(-2...2).step.size.should == 4
(-2.0...2.0).step.size.should == 4
(-2...2.0).step.size.should == 4
(-2.0...2).step.size.should == 4
(1.0...6.4).step(1.8).size.should == 3
(1.0...55.6).step(18.2).size.should == 3
end
it "returns nil with begin and end are String" do
("A".."E").step(2).size.should == nil
("A"..."E").step(2).size.should == nil
("A".."E").step.size.should == nil
("A"..."E").step.size.should == nil
end
it "return nil and not raises a TypeError if the first element does not respond to #succ" do
obj = mock("Range#step non-comparable")
obj.should_receive(:<=>).with(obj).and_return(1)
enum = (obj..obj).step
-> { enum.size }.should_not raise_error
enum.size.should == nil
end
end
describe "type" do
ruby_version_is ""..."2.6" do
it "returns an instance of Enumerator" do
(1..10).step.class.should == Enumerator
end
end
ruby_version_is "2.6" do
context "when both begin and end are numerics" do
it "returns an instance of Enumerator::ArithmeticSequence" do
(1..10).step.class.should == Enumerator::ArithmeticSequence
end
end
context "when begin and end are not numerics" do
it "returns an instance of Enumerator" do
("a".."z").step.class.should == Enumerator
end
end
end
end
end
end
end
View git blame Copy permalink