30 lines
684 B
Crystal
30 lines
684 B
Crystal
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require "./spec_helper"
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describe Array do
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describe "#union" do
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it "works with no elements" do
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([] of Set(Int32)).union.should eq(Set(Int32).new)
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end
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it "correctly performs a union" do
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[Set { 1 }, Set { 2 }, Set {1, 2, 3}].union.should eq(Set { 1,2,3})
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end
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end
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describe "#intersect" do
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expect_raises(Enumerable::EmptyError) do
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([] of Set(Int32)).intersect
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end
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it "correctly performs an intersection" do
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[Set {1}, Set {1,2}, Set {1,2,3}].intersect.should eq(Set{1})
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end
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end
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describe "#zip_with" do
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it "performs as expected" do
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[1,2,3].zip_with([2,3,4]) { |l,r| l*r }.should eq([2,6,12])
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end
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end
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end
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