mirror of
https://github.com/ruby/ruby.git
synced 2022-11-09 12:17:21 -05:00
70 lines
1.9 KiB
Ruby
70 lines
1.9 KiB
Ruby
|
require File.expand_path('../../../spec_helper', __FILE__)
|
||
|
|
||
|
describe "Integer#upto [stop] when self and stop are Fixnums" do
|
||
|
it "does not yield when stop is less than self" do
|
||
|
result = []
|
||
|
5.upto(4) { |x| result << x }
|
||
|
result.should == []
|
||
|
end
|
||
|
|
||
|
it "yields once when stop equals self" do
|
||
|
result = []
|
||
|
5.upto(5) { |x| result << x }
|
||
|
result.should == [5]
|
||
|
end
|
||
|
|
||
|
it "yields while increasing self until it is less than stop" do
|
||
|
result = []
|
||
|
2.upto(5) { |x| result << x }
|
||
|
result.should == [2, 3, 4, 5]
|
||
|
end
|
||
|
|
||
|
it "yields while increasing self until it is greater than floor of a Float endpoint" do
|
||
|
result = []
|
||
|
9.upto(13.3) {|i| result << i}
|
||
|
-5.upto(-1.3) {|i| result << i}
|
||
|
result.should == [9,10,11,12,13,-5,-4,-3,-2]
|
||
|
end
|
||
|
|
||
|
it "raises an ArgumentError for non-numeric endpoints" do
|
||
|
lambda { 1.upto("A") {|x| p x} }.should raise_error(ArgumentError)
|
||
|
lambda { 1.upto(nil) {|x| p x} }.should raise_error(ArgumentError)
|
||
|
end
|
||
|
|
||
|
describe "when no block is given" do
|
||
|
it "returns an Enumerator" do
|
||
|
result = []
|
||
|
|
||
|
enum = 2.upto(5)
|
||
|
enum.each { |i| result << i }
|
||
|
|
||
|
result.should == [2, 3, 4, 5]
|
||
|
end
|
||
|
|
||
|
describe "returned Enumerator" do
|
||
|
describe "size" do
|
||
|
it "raises an ArgumentError for non-numeric endpoints" do
|
||
|
enum = 1.upto("A")
|
||
|
lambda { enum.size }.should raise_error(ArgumentError)
|
||
|
enum = 1.upto(nil)
|
||
|
lambda { enum.size }.should raise_error(ArgumentError)
|
||
|
end
|
||
|
|
||
|
it "returns stop - self + 1" do
|
||
|
5.upto(10).size.should == 6
|
||
|
1.upto(10).size.should == 10
|
||
|
0.upto(10).size.should == 11
|
||
|
0.upto(0).size.should == 1
|
||
|
-5.upto(-3).size.should == 3
|
||
|
end
|
||
|
|
||
|
it "returns 0 when stop < self" do
|
||
|
5.upto(4).size.should == 0
|
||
|
0.upto(-5).size.should == 0
|
||
|
-3.upto(-5).size.should == 0
|
||
|
end
|
||
|
end
|
||
|
end
|
||
|
end
|
||
|
end
|