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require File.expand_path('../../../spec_helper', __FILE__)
require File.expand_path('../fixtures/classes', __FILE__)
describe "Enumerable#any?" do
before :each do
@enum = EnumerableSpecs::Numerous.new
@empty = EnumerableSpecs::Empty.new()
@enum1 = [0, 1, 2, -1]
@enum2 = [nil, false, true]
end
it "always returns false on empty enumeration" do
@empty.any?.should == false
@empty.any? { nil }.should == false
[].any?.should == false
[].any? { false }.should == false
{}.any?.should == false
{}.any? { nil }.should == false
end
it "raises an ArgumentError when more than 1 argument is provided" do
lambda { @enum.any?(1, 2, 3) }.should raise_error(ArgumentError)
lambda { [].any?(1, 2, 3) }.should raise_error(ArgumentError)
lambda { {}.any?(1, 2, 3) }.should raise_error(ArgumentError)
end
ruby_version_is ""..."2.5" do
it "raises an ArgumentError when any arguments provided" do
lambda { @enum.any?(Proc.new {}) }.should raise_error(ArgumentError)
lambda { @enum.any?(nil) }.should raise_error(ArgumentError)
lambda { @empty.any?(1) }.should raise_error(ArgumentError)
lambda { @enum1.any?(1) {} }.should raise_error(ArgumentError)
end
end
it "does not hide exceptions out of #each" do
lambda {
EnumerableSpecs::ThrowingEach.new.any?
}.should raise_error(RuntimeError)
lambda {
EnumerableSpecs::ThrowingEach.new.any? { false }
}.should raise_error(RuntimeError)
end
describe "with no block" do
it "returns true if any element is not false or nil" do
@enum.any?.should == true
@enum1.any?.should == true
@enum2.any?.should == true
EnumerableSpecs::Numerous.new(true).any?.should == true
EnumerableSpecs::Numerous.new('a','b','c').any?.should == true
EnumerableSpecs::Numerous.new('a','b','c', nil).any?.should == true
EnumerableSpecs::Numerous.new(1, nil, 2).any?.should == true
EnumerableSpecs::Numerous.new(1, false).any?.should == true
EnumerableSpecs::Numerous.new(false, nil, 1, false).any?.should == true
EnumerableSpecs::Numerous.new(false, 0, nil).any?.should == true
end
it "returns false if all elements are false or nil" do
EnumerableSpecs::Numerous.new(false).any?.should == false
EnumerableSpecs::Numerous.new(false, false).any?.should == false
EnumerableSpecs::Numerous.new(nil).any?.should == false
EnumerableSpecs::Numerous.new(nil, nil).any?.should == false
EnumerableSpecs::Numerous.new(nil, false, nil).any?.should == false
end
it "gathers whole arrays as elements when each yields multiple" do
multi = EnumerableSpecs::YieldsMultiWithFalse.new
multi.any?.should be_true
end
end
describe "with block" do
it "returns true if the block ever returns other than false or nil" do
@enum.any? { true }.should == true
@enum.any? { 0 }.should == true
@enum.any? { 1 }.should == true
@enum1.any? { Object.new }.should == true
@enum1.any?{ |o| o < 1 }.should == true
@enum1.any?{ |o| 5 }.should == true
@enum2.any? { |i| i == nil }.should == true
end
it "any? should return false if the block never returns other than false or nil" do
@enum.any? { false }.should == false
@enum.any? { nil }.should == false
@enum1.any?{ |o| o < -10 }.should == false
@enum1.any?{ |o| nil }.should == false
@enum2.any? { |i| i == :stuff }.should == false
end
it "stops iterating once the return value is determined" do
yielded = []
EnumerableSpecs::Numerous.new(:one, :two, :three).any? do |e|
yielded << e
false
end.should == false
yielded.should == [:one, :two, :three]
yielded = []
EnumerableSpecs::Numerous.new(true, true, false, true).any? do |e|
yielded << e
e
end.should == true
yielded.should == [true]
yielded = []
EnumerableSpecs::Numerous.new(false, nil, false, true, false).any? do |e|
yielded << e
e
end.should == true
yielded.should == [false, nil, false, true]
yielded = []
EnumerableSpecs::Numerous.new(1, 2, 3, 4, 5).any? do |e|
yielded << e
e
end.should == true
yielded.should == [1]
end
it "does not hide exceptions out of the block" do
lambda {
@enum.any? { raise "from block" }
}.should raise_error(RuntimeError)
end
it "gathers initial args as elements when each yields multiple" do
multi = EnumerableSpecs::YieldsMulti.new
multi.any? {|e| e == 1 }.should be_true
end
it "yields multiple arguments when each yields multiple" do
multi = EnumerableSpecs::YieldsMulti.new
yielded = []
multi.any? {|e, i| yielded << [e, i] }
yielded.should == [[1, 2]]
end
end
ruby_version_is "2.5" do
describe 'when given a pattern argument' do
class EnumerableSpecs::Pattern
attr_reader :yielded
def initialize(&block)
@block = block
@yielded = []
end
def ===(*args)
@yielded << args
@block.call(*args)
end
end
it "calls `===` on the pattern the return value " do
pattern = EnumerableSpecs::Pattern.new { |x| x == 2 }
@enum1.any?(pattern).should == true
pattern.yielded.should == [[0], [1], [2]]
end
it "ignores block" do
@enum2.any?(NilClass) { raise }.should == true
[1, 2, nil].any?(NilClass) { raise }.should == true
{a: 1}.any?(Array) { raise }.should == true
end
it "always returns false on empty enumeration" do
@empty.any?(Integer).should == false
[].any?(Integer).should == false
{}.any?(NilClass).should == false
end
it "does not hide exceptions out of #each" do
lambda {
EnumerableSpecs::ThrowingEach.new.any?(Integer)
}.should raise_error(RuntimeError)
end
it "returns true if the pattern ever returns a truthy value" do
@enum2.any?(NilClass).should == true
pattern = EnumerableSpecs::Pattern.new { |x| 42 }
@enum.any?(pattern).should == true
[1, 42, 3].any?(pattern).should == true
pattern = EnumerableSpecs::Pattern.new { |x| x == [:b, 2] }
{a: 1, b: 2}.any?(pattern).should == true
end
it "any? should return false if the block never returns other than false or nil" do
pattern = EnumerableSpecs::Pattern.new { |x| nil }
@enum1.any?(pattern).should == false
pattern.yielded.should == [[0], [1], [2], [-1]]
[1, 2, 3].any?(pattern).should == false
{a: 1}.any?(pattern).should == false
end
it "does not hide exceptions out of the block" do
pattern = EnumerableSpecs::Pattern.new { raise "from pattern" }
lambda {
@enum.any?(pattern)
}.should raise_error(RuntimeError)
end
it "calls the pattern with gathered array when yielded with multiple arguments" do
pattern = EnumerableSpecs::Pattern.new { false }
EnumerableSpecs::YieldsMixed2.new.any?(pattern).should == false
pattern.yielded.should == EnumerableSpecs::YieldsMixed2.gathered_yields.map { |x| [x] }
pattern = EnumerableSpecs::Pattern.new { false }
{a: 1, b: 2}.any?(pattern).should == false
pattern.yielded.should == [[[:a, 1]], [[:b, 2]]]
end
end
end
end
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