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

  it "returns an Enumerator if no block given" do
    @numerous.find_index.should be_kind_of(Enumerator)
  end
end

Version data entries

4 entries across 4 versions & 1 rubygems

Version	Path
opal-0.3.22	spec/core/enumerable/find_index_spec.rb
opal-0.3.21	test/core/enumerable/find_index_spec.rb
opal-0.3.20	test/core/enumerable/find_index_spec.rb
opal-0.3.19	test/core/enumerable/find_index_spec.rb