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Contents
describe "Enumerable#find_index" do
before :each do
@elements = [2, 4, 6, 8, 10]
@numerous = EnumerableSpecs::Numerous.new(*@elements)
end
it "passes each entry in enum to block while block when block is false" do
visited_elements = []
@numerous.find_index do |element|
visited_elements << element
false
end
visited_elements.should == @elements
end
it "returns nil when the block is false" do
@numerous.find_index {|e| false }.should == nil
end
it "returns the first index for which the block is not false" do
@elements.each_with_index do |element, index|
@numerous.find_index {|e| e > element - 1 }.should == index
end
end
it "returns the first found index" do
repeated = [10, 11, 11, 13, 11, 13, 10, 10, 13, 11]
numerous_repeat = EnumerableSpecs::Numerous.new(*repeated)
repeated.each do |element|
numerous_repeat.find_index(element).should == element - 10
end
end
it "returns nil when the element not found" do
@numerous.find_index(-1).should == nil
end
it "ignores the block if an argument is given" do
@numerous.find_index(-1) {|e| true }.should == nil
end
end
Version data entries
17 entries across 17 versions & 1 rubygems