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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.all?.should == true
@empty.all? { nil }.should == true
[].all?.should == true
[].all? { false }.should == true
{}.all?.should == true
{}.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
ruby_version_is ""..."2.5" do
it "raises an ArgumentError when any arguments provided" do
-> { @enum.all?(Proc.new {}) }.should raise_error(ArgumentError)
-> { @enum.all?(nil) }.should raise_error(ArgumentError)
-> { @empty.all?(1) }.should raise_error(ArgumentError)
-> { @enum1.all?(1) {} }.should raise_error(ArgumentError)
end
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.all?.should == true
@enum1.all?.should == true
@enum2.all?.should == false
EnumerableSpecs::Numerous.new('a','b','c').all?.should == true
EnumerableSpecs::Numerous.new(0, "x", true).all?.should == true
end
it "returns false if there are false or nil elements" do
EnumerableSpecs::Numerous.new(false).all?.should == false
EnumerableSpecs::Numerous.new(false, false).all?.should == false
EnumerableSpecs::Numerous.new(nil).all?.should == false
EnumerableSpecs::Numerous.new(nil, nil).all?.should == false
EnumerableSpecs::Numerous.new(1, nil, 2).all?.should == false
EnumerableSpecs::Numerous.new(0, "x", false, true).all?.should == false
@enum2.all?.should == false
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
ruby_version_is "2.5" do
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
end
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