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73 lines
2 KiB
Ruby
73 lines
2 KiB
Ruby
require_relative '../../spec_helper'
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require 'set'
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describe "Set#initialize" do
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it "is private" do
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Set.should have_private_instance_method(:initialize)
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end
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it "adds all elements of the passed Enumerable to self" do
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s = Set.new([1, 2, 3])
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s.size.should eql(3)
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s.should include(1)
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s.should include(2)
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s.should include(3)
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end
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it "uses #each_entry on the provided Enumerable" do
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enumerable = MockObject.new('mock-enumerable')
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enumerable.should_receive(:each_entry).and_yield(1).and_yield(2).and_yield(3)
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s = Set.new(enumerable)
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s.size.should eql(3)
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s.should include(1)
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s.should include(2)
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s.should include(3)
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end
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it "uses #each on the provided Enumerable if it does not respond to #each_entry" do
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enumerable = MockObject.new('mock-enumerable')
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enumerable.should_receive(:each).and_yield(1).and_yield(2).and_yield(3)
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s = Set.new(enumerable)
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s.size.should eql(3)
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s.should include(1)
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s.should include(2)
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s.should include(3)
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end
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it "raises if the provided Enumerable does not respond to #each_entry or #each" do
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enumerable = MockObject.new('mock-enumerable')
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-> { Set.new(enumerable) }.should raise_error(ArgumentError, "value must be enumerable")
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end
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it "should initialize with empty array and set" do
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s = Set.new([])
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s.size.should eql(0)
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s = Set.new({})
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s.size.should eql(0)
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end
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it "preprocesses all elements by a passed block before adding to self" do
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s = Set.new([1, 2, 3]) { |x| x * x }
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s.size.should eql(3)
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s.should include(1)
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s.should include(4)
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s.should include(9)
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end
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it "should initialize with empty array and block" do
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s = Set.new([]) { |x| x * x }
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s.size.should eql(0)
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end
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it "should initialize with empty set and block" do
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s = Set.new(Set.new) { |x| x * x }
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s.size.should eql(0)
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end
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it "should initialize with just block" do
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s = Set.new { |x| x * x }
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s.size.should eql(0)
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s.should eql(Set.new)
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end
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end
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