1 files changed, 153 insertions, 0 deletions
diff --git a/spec/ruby/core/enumerable/none_spec.rb b/spec/ruby/core/enumerable/none_spec.rb
new file mode 100644
index 0000000000..d9ee0b441e
--- /dev/null
+++ b/spec/ruby/core/enumerable/none_spec.rb
@@ -0,0 +1,153 @@
+require_relative '../../spec_helper'
+require_relative 'fixtures/classes'
+
+describe "Enumerable#none?" do
+  before :each do
+    @empty = EnumerableSpecs::Empty.new
+    @enum = EnumerableSpecs::Numerous.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.none?
+    @empty.none? { true }.should == true
+  end
+
+  it "raises an ArgumentError when more than 1 argument is provided" do
+    -> { @enum.none?(1, 2, 3) }.should.raise(ArgumentError)
+    -> { [].none?(1, 2, 3) }.should.raise(ArgumentError)
+    -> { {}.none?(1, 2, 3) }.should.raise(ArgumentError)
+  end
+
+  it "does not hide exceptions out of #each" do
+    -> {
+      EnumerableSpecs::ThrowingEach.new.none?
+    }.should.raise(RuntimeError)
+
+    -> {
+      EnumerableSpecs::ThrowingEach.new.none? { false }
+    }.should.raise(RuntimeError)
+  end
+
+  describe "with no block" do
+    it "returns true if none of the elements in self are true" do
+      e = EnumerableSpecs::Numerous.new(false, nil, false)
+      e.none?.should == true
+    end
+
+    it "returns false if at least one of the elements in self are true" do
+      e = EnumerableSpecs::Numerous.new(false, nil, true, false)
+      e.none?.should == false
+    end
+
+    it "gathers whole arrays as elements when each yields multiple" do
+      multi = EnumerableSpecs::YieldsMultiWithFalse.new
+      multi.none?.should == false
+    end
+  end
+
+  describe "with a block" do
+    before :each do
+      @e = EnumerableSpecs::Numerous.new(1,1,2,3,4)
+    end
+
+    it "passes each element to the block in turn until it returns true" do
+      acc = []
+      @e.none? {|e| acc << e; false }
+      acc.should == [1,1,2,3,4]
+    end
+
+    it "stops passing elements to the block when it returns true" do
+      acc = []
+      @e.none? {|e| acc << e; e == 3 ? true : false }
+      acc.should == [1,1,2,3]
+    end
+
+    it "returns true if the block never returns true" do
+      @e.none? {|e| false }.should == true
+    end
+
+    it "returns false if the block ever returns true" do
+      @e.none? {|e| e == 3 ? true : false }.should == false
+    end
+
+    it "does not hide exceptions out of the block" do
+      -> {
+        @enum.none? { raise "from block" }
+      }.should.raise(RuntimeError)
+    end
+
+    it "gathers initial args as elements when each yields multiple" do
+      multi = EnumerableSpecs::YieldsMulti.new
+      yielded = []
+      multi.none? { |e| yielded << e; false }
+      yielded.should == [1, 3, 6]
+    end
+
+    it "yields multiple arguments when each yields multiple" do
+      multi = EnumerableSpecs::YieldsMulti.new
+      yielded = []
+      multi.none? { |*args| yielded << args; false }
+      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 == 3 }
+      @enum1.none?(pattern).should == true
+      pattern.yielded.should == [[0], [1], [2], [-1]]
+    end
+
+    it "always returns true on empty enumeration" do
+      @empty.none?(Integer).should == true
+      [].none?(Integer).should == true
+      {}.none?(NilClass).should == true
+    end
+
+    it "does not hide exceptions out of #each" do
+      -> {
+        EnumerableSpecs::ThrowingEach.new.none?(Integer)
+      }.should.raise(RuntimeError)
+    end
+
+    it "returns true if the pattern never returns a truthy value" do
+      @enum2.none?(Integer).should == true
+      pattern = EnumerableSpecs::Pattern.new { |x| nil }
+      @enum.none?(pattern).should == true
+
+      [1, 42, 3].none?(pattern).should == true
+      {a: 1, b: 2}.none?(pattern).should == true
+    end
+
+    it "returns false if the pattern ever returns other than false or nil" do
+      pattern = EnumerableSpecs::Pattern.new { |x| x < 0 }
+      @enum1.none?(pattern).should == false
+      pattern.yielded.should == [[0], [1], [2], [-1]]
+
+      [1, 2, 3, -1].none?(pattern).should == false
+      {a: 1}.none?(Array).should == false
+    end
+
+    it "does not hide exceptions out of pattern#===" do
+      pattern = EnumerableSpecs::Pattern.new { raise "from pattern" }
+      -> {
+        @enum.none?(pattern)
+      }.should.raise(RuntimeError)
+    end
+
+    it "calls the pattern with gathered array when yielded with multiple arguments" do
+      multi = EnumerableSpecs::YieldsMulti.new
+      pattern = EnumerableSpecs::Pattern.new { false }
+      multi.none?(pattern).should == true
+      pattern.yielded.should == [[[1, 2]], [[3, 4, 5]], [[6, 7, 8, 9]]]
+    end
+
+    it "ignores the block if there is an argument" do
+      -> {
+        EnumerableSpecs::Numerous.new(1, 2, 3, 4, 5).none?(String) { true }.should == true
+      }.should complain(/given block not used/)
+    end
+  end
+end