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require "spec"
private class ComparableTestClass
include Comparable(Int)
def initialize(@value : Int32, @return_nil = false)
end
def <=>(other : Int)
return nil if @return_nil
@value <=> other
end
end
describe Comparable do
it "can compare against Int (#2461)" do
obj = ComparableTestClass.new(4)
(obj == 3).should be_false
(obj == 4).should be_true
(obj < 3).should be_false
(obj < 4).should be_false
(obj > 3).should be_true
(obj > 4).should be_false
(obj <= 3).should be_false
(obj <= 4).should be_true
(obj <= 5).should be_true
(obj >= 3).should be_true
(obj >= 4).should be_true
(obj >= 5).should be_false
end
it "checks for nil" do
obj = ComparableTestClass.new(4, return_nil: true)
(obj < 1).should be_false
(obj <= 1).should be_false
(obj == 1).should be_false
(obj >= 1).should be_false
(obj > 1).should be_false
end
describe "clamp" do
describe "number" do
it "clamps integers" do
-5.clamp(-10, 100).should eq(-5)
-5.clamp(10, 100).should eq(10)
5.clamp(10, 100).should eq(10)
50.clamp(10, 100).should eq(50)
500.clamp(10, 100).should eq(100)
50.clamp(10..100).should eq(50)
50.clamp(10..nil).should eq(50)
50.clamp(10...nil).should eq(50)
5.clamp(10..nil).should eq(10)
5.clamp(10...nil).should eq(10)
5.clamp(nil..10).should eq(5)
50.clamp(nil..10).should eq(10)
end
it "clamps floats" do
-5.5.clamp(-10.1, 100.1).should eq(-5.5)
-5.5.clamp(10.1, 100.1).should eq(10.1)
5.5.clamp(10.1, 100.1).should eq(10.1)
50.5.clamp(10.1, 100.1).should eq(50.5)
500.5.clamp(10.1, 100.1).should eq(100.1)
50.5.clamp(10.1..100.1).should eq(50.5)
end
it "fails with an exclusive range" do
expect_raises(ArgumentError) do
range = Range.new(1, 2, exclusive: true)
5.clamp(range)
end
end
end
describe "String" do
it "clamps strings" do
"e".clamp("a", "s").should eq "e"
"e".clamp("f", "s").should eq "f"
"e".clamp("a", "c").should eq "c"
"this".clamp("thief", "thin").should eq "thin"
end
end
end
end
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