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Contents
describe "Enumerable#detect" do
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.detect 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.detect {|e| false}.should == nil
end
it "returns the first element for which the block is not false" do
@elements.each do |element|
# @numerous.detect {|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.detect(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 should't have been called" }
@numerous.detect(fail_proc) {|e| 2 == @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.detect(fail_proc) {|e| false }.should == "cheeseburgers"
end
it "calls the ifnone proc when there are no elements" do
fail_proc = lambda { "yay" }
@empty.detect(fail_proc) {|e| true}.should == "yay"
end
end
Version data entries
14 entries across 14 versions & 1 rubygems