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77 lines
2.5 KiB
Ruby
77 lines
2.5 KiB
Ruby
require_relative 'enumerable_enumeratorized'
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describe :enumerable_find, shared: true do
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# #detect and #find are aliases, so we only need one function
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before :each do
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ScratchPad.record []
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@elements = [2, 4, 6, 8, 10]
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@numerous = EnumerableSpecs::Numerous.new(*@elements)
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@empty = []
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end
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it "passes each entry in enum to block while block when block is false" do
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visited_elements = []
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@numerous.send(@method) do |element|
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visited_elements << element
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false
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end
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visited_elements.should == @elements
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end
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it "returns nil when the block is false and there is no ifnone proc given" do
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@numerous.send(@method) {|e| false }.should == nil
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end
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it "returns the first element for which the block is not false" do
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@elements.each do |element|
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@numerous.send(@method) {|e| e > element - 1 }.should == element
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end
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end
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it "returns the value of the ifnone proc if the block is false" do
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fail_proc = -> { "cheeseburgers" }
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@numerous.send(@method, fail_proc) {|e| false }.should == "cheeseburgers"
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end
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it "doesn't call the ifnone proc if an element is found" do
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fail_proc = -> { raise "This shouldn't have been called" }
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@numerous.send(@method, fail_proc) {|e| e == @elements.first }.should == 2
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end
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it "calls the ifnone proc only once when the block is false" do
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times = 0
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fail_proc = -> { times += 1; raise if times > 1; "cheeseburgers" }
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@numerous.send(@method, fail_proc) {|e| false }.should == "cheeseburgers"
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end
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it "calls the ifnone proc when there are no elements" do
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fail_proc = -> { "yay" }
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@empty.send(@method, fail_proc) {|e| true}.should == "yay"
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end
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it "ignores the ifnone argument when nil" do
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@numerous.send(@method, nil) {|e| false }.should == nil
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end
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it "passes through the values yielded by #each_with_index" do
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[:a, :b].each_with_index.send(@method) { |x, i| ScratchPad << [x, i]; nil }
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ScratchPad.recorded.should == [[:a, 0], [:b, 1]]
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end
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it "returns an enumerator when no block given" do
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@numerous.send(@method).should be_an_instance_of(Enumerator)
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end
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it "passes the ifnone proc to the enumerator" do
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times = 0
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fail_proc = -> { times += 1; raise if times > 1; "cheeseburgers" }
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@numerous.send(@method, fail_proc).each {|e| false }.should == "cheeseburgers"
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end
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it "gathers whole arrays as elements when each yields multiple" do
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multi = EnumerableSpecs::YieldsMulti.new
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multi.send(@method) {|e| e == [1, 2] }.should == [1, 2]
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end
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it_should_behave_like :enumerable_enumeratorized_with_unknown_size
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end
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