1 files changed, 60 insertions, 0 deletions
diff --git a/spec/ruby/core/enumerator/lazy/shared/select.rb b/spec/ruby/core/enumerator/lazy/shared/select.rb
new file mode 100644
index 0000000000..546256360e
--- /dev/null
+++ b/spec/ruby/core/enumerator/lazy/shared/select.rb
@@ -0,0 +1,60 @@
+# -*- encoding: us-ascii -*-
+
+require File.expand_path('../../../../../spec_helper', __FILE__)
+require File.expand_path('../../fixtures/classes', __FILE__)
+
+describe :enumerator_lazy_select, shared: true do
+  before :each do
+    @yieldsmixed = EnumeratorLazySpecs::YieldsMixed.new.to_enum.lazy
+    @eventsmixed = EnumeratorLazySpecs::EventsMixed.new.to_enum.lazy
+    ScratchPad.record []
+  end
+
+  after :each do
+    ScratchPad.clear
+  end
+
+  it "returns a new instance of Enumerator::Lazy" do
+    ret = @yieldsmixed.send(@method) {}
+    ret.should be_an_instance_of(Enumerator::Lazy)
+    ret.should_not equal(@yieldsmixed)
+  end
+
+  it "sets #size to nil" do
+    Enumerator::Lazy.new(Object.new, 100) {}.send(@method) { true }.size.should == nil
+  end
+
+  describe "when the returned lazy enumerator is evaluated by Enumerable#first" do
+    it "stops after specified times" do
+      (0..Float::INFINITY).lazy.send(@method, &:even?).first(3).should == [0, 2, 4]
+
+      @eventsmixed.send(@method) { true }.first(1)
+      ScratchPad.recorded.should == [:before_yield]
+    end
+  end
+
+  it "calls the block with a gathered array when yield with multiple arguments" do
+    yields = []
+    @yieldsmixed.send(@method) { |v| yields << v }.force
+    yields.should == EnumeratorLazySpecs::YieldsMixed.gathered_yields
+  end
+
+  it "raises an ArgumentError when not given a block" do
+    lambda { @yieldsmixed.send(@method) }.should raise_error(ArgumentError)
+  end
+
+  describe "on a nested Lazy" do
+    it "sets #size to nil" do
+      Enumerator::Lazy.new(Object.new, 100) {}.take(50) {}.send(@method) { true }.size.should == nil
+    end
+
+    describe "when the returned lazy enumerator is evaluated by Enumerable#first" do
+      it "stops after specified times" do
+        (0..Float::INFINITY).lazy.send(@method) { |n| n > 5 }.send(@method, &:even?).first(3).should == [6, 8, 10]
+
+        @eventsmixed.send(@method) { true }.send(@method) { true }.first(1)
+        ScratchPad.recorded.should == [:before_yield]
+      end
+    end
+  end
+end