require_relative '../../spec_helper' require_relative 'fixtures/classes' describe "Enumerable#all?" do before :each do @enum = EnumerableSpecs::Numerous.new @empty = EnumerableSpecs::Empty.new() @enum1 = EnumerableSpecs::Numerous.new(0, 1, 2, -1) @enum2 = EnumerableSpecs::Numerous.new(nil, false, true) end it "always returns true on empty enumeration" do @empty.should.all? @empty.all? { nil }.should == true [].should.all? [].all? { false }.should == true {}.should.all? {}.all? { nil }.should == true end it "raises an ArgumentError when more than 1 argument is provided" do -> { @enum.all?(1, 2, 3) }.should raise_error(ArgumentError) -> { [].all?(1, 2, 3) }.should raise_error(ArgumentError) -> { {}.all?(1, 2, 3) }.should raise_error(ArgumentError) end it "does not hide exceptions out of #each" do -> { EnumerableSpecs::ThrowingEach.new.all? }.should raise_error(RuntimeError) -> { EnumerableSpecs::ThrowingEach.new.all? { false } }.should raise_error(RuntimeError) end describe "with no block" do it "returns true if no elements are false or nil" do @enum.should.all? @enum1.should.all? @enum2.should_not.all? EnumerableSpecs::Numerous.new('a','b','c').should.all? EnumerableSpecs::Numerous.new(0, "x", true).should.all? end it "returns false if there are false or nil elements" do EnumerableSpecs::Numerous.new(false).should_not.all? EnumerableSpecs::Numerous.new(false, false).should_not.all? EnumerableSpecs::Numerous.new(nil).should_not.all? EnumerableSpecs::Numerous.new(nil, nil).should_not.all? EnumerableSpecs::Numerous.new(1, nil, 2).should_not.all? EnumerableSpecs::Numerous.new(0, "x", false, true).should_not.all? @enum2.should_not.all? end it "gathers whole arrays as elements when each yields multiple" do multi = EnumerableSpecs::YieldsMultiWithFalse.new multi.all?.should be_true end end describe "with block" do it "returns true if the block never returns false or nil" do @enum.all? { true }.should == true @enum1.all?{ |o| o < 5 }.should == true @enum1.all?{ |o| 5 }.should == true end it "returns false if the block ever returns false or nil" do @enum.all? { false }.should == false @enum.all? { nil }.should == false @enum1.all?{ |o| o > 2 }.should == false EnumerableSpecs::Numerous.new.all? { |i| i > 5 }.should == false EnumerableSpecs::Numerous.new.all? { |i| i == 3 ? nil : true }.should == false end it "stops iterating once the return value is determined" do yielded = [] EnumerableSpecs::Numerous.new(:one, :two, :three).all? do |e| yielded << e false end.should == false yielded.should == [:one] yielded = [] EnumerableSpecs::Numerous.new(true, true, false, true).all? do |e| yielded << e e end.should == false yielded.should == [true, true, false] yielded = [] EnumerableSpecs::Numerous.new(1, 2, 3, 4, 5).all? do |e| yielded << e e end.should == true yielded.should == [1, 2, 3, 4, 5] end it "does not hide exceptions out of the block" do -> { @enum.all? { raise "from block" } }.should raise_error(RuntimeError) end it "gathers initial args as elements when each yields multiple" do multi = EnumerableSpecs::YieldsMulti.new yielded = [] multi.all? { |e| yielded << e }.should == true yielded.should == [1, 3, 6] end it "yields multiple arguments when each yields multiple" do multi = EnumerableSpecs::YieldsMulti.new yielded = [] multi.all? { |*args| yielded << args }.should == true yielded.should == [[1, 2], [3, 4, 5], [6, 7, 8, 9]] end end describe 'when given a pattern argument' do it "calls `===` on the pattern the return value " do pattern = EnumerableSpecs::Pattern.new { |x| x >= 0 } @enum1.all?(pattern).should == false pattern.yielded.should == [[0], [1], [2], [-1]] end # may raise an exception in future versions ruby_version_is ""..."2.6" do it "ignores block" do @enum2.all?(NilClass) { raise }.should == false [1, 2, nil].all?(NilClass) { raise }.should == false {a: 1}.all?(Array) { raise }.should == true end end it "always returns true on empty enumeration" do @empty.all?(Integer).should == true [].all?(Integer).should == true {}.all?(NilClass).should == true end it "does not hide exceptions out of #each" do -> { EnumerableSpecs::ThrowingEach.new.all?(Integer) }.should raise_error(RuntimeError) end it "returns true if the pattern never returns false or nil" do pattern = EnumerableSpecs::Pattern.new { |x| 42 } @enum.all?(pattern).should == true [1, 42, 3].all?(pattern).should == true pattern = EnumerableSpecs::Pattern.new { |x| Array === x } {a: 1, b: 2}.all?(pattern).should == true end it "returns false if the pattern ever returns false or nil" do pattern = EnumerableSpecs::Pattern.new { |x| x >= 0 } @enum1.all?(pattern).should == false pattern.yielded.should == [[0], [1], [2], [-1]] [1, 2, 3, -1].all?(pattern).should == false pattern = EnumerableSpecs::Pattern.new { |x| x[1] >= 0 } {a: 1, b: -1}.all?(pattern).should == false end it "does not hide exceptions out of pattern#===" do pattern = EnumerableSpecs::Pattern.new { raise "from pattern" } -> { @enum.all?(pattern) }.should raise_error(RuntimeError) end it "calls the pattern with gathered array when yielded with multiple arguments" do multi = EnumerableSpecs::YieldsMulti.new pattern = EnumerableSpecs::Pattern.new { true } multi.all?(pattern).should == true pattern.yielded.should == [[[1, 2]], [[3, 4, 5]], [[6, 7, 8, 9]]] end end end