ruby--ruby/spec/ruby/library/scanf/io/scanf_spec.rb

require_relative '../../../spec_helper'

ruby_version_is ''...'2.7' do
  require_relative 'shared/block_scanf'
  require 'scanf'

  describe "IO#scanf" do
    before :each do
      @hw = File.open(fixture(__FILE__, 'helloworld.txt'), 'rb')
      @data = File.open(fixture(__FILE__, 'date.txt'), 'rb')
    end

    after :each do
      @hw.close unless @hw.closed?
      @data.close unless @data.closed?
    end

    it "returns an array containing the input converted in the specified type" do
      @hw.scanf("%s%s").should == ["hello", "world"]
      @data.scanf("%s%d").should == ["Beethoven", 1770]
    end

    it "returns an array containing the input converted in the specified type with given maximum field width" do
      @hw.scanf("%2s").should == ["he"]
      @data.scanf("%2c").should == ["Be"]
    end

    it "returns an empty array when a wrong specifier is passed" do
      @hw.scanf("%a").should == []
      @hw.scanf("%1").should == []
      @data.scanf("abc").should == []
    end
  end

  describe "IO#scanf with block" do
    it_behaves_like :scanf_io_block_scanf, :scanf
  end
end