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