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Diffstat (limited to 'spec/ruby/core/enumerable/all_spec.rb')
-rw-r--r-- | spec/ruby/core/enumerable/all_spec.rb | 121 |
1 files changed, 121 insertions, 0 deletions
diff --git a/spec/ruby/core/enumerable/all_spec.rb b/spec/ruby/core/enumerable/all_spec.rb new file mode 100644 index 0000000000..bfde584260 --- /dev/null +++ b/spec/ruby/core/enumerable/all_spec.rb @@ -0,0 +1,121 @@ +require File.expand_path('../../../spec_helper', __FILE__) +require File.expand_path('../fixtures/classes', __FILE__) + +describe "Enumerable#all?" 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 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 "does not hide exceptions out of #each" do + lambda { + EnumerableSpecs::ThrowingEach.new.all? + }.should raise_error(RuntimeError) + + lambda { + 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 + lambda { + @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 + multi.all? {|e| !(Array === e) }.should be_true + end + + it "yields multiple arguments when each yields multiple" do + multi = EnumerableSpecs::YieldsMulti.new + yielded = [] + multi.all? {|e, i| yielded << [e, i] } + yielded.should == [[1, 2], [3, 4], [6, 7]] + end + + end +end |