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43 lines
1 KiB
Ruby
43 lines
1 KiB
Ruby
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require File.expand_path('../../../spec_helper', __FILE__)
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require 'set'
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describe "Set#select!" do
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before :each do
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@set = Set["one", "two", "three"]
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end
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it "yields every element of self" do
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ret = []
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@set.select! { |x| ret << x }
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ret.sort.should == ["one", "two", "three"].sort
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end
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it "keeps every element from self for which the passed block returns true" do
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@set.select! { |x| x.size != 3 }
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@set.size.should eql(1)
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@set.should_not include("one")
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@set.should_not include("two")
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@set.should include("three")
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end
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it "returns self when self was modified" do
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@set.select! { false }.should equal(@set)
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end
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it "returns nil when self was not modified" do
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@set.select! { true }.should be_nil
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end
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it "returns an Enumerator when passed no block" do
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enum = @set.select!
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enum.should be_an_instance_of(Enumerator)
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enum.each { |x| x.size != 3 }
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@set.should_not include("one")
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@set.should_not include("two")
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@set.should include("three")
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end
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end
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