1 files changed, 53 insertions, 0 deletions
diff --git a/spec/ruby/core/dir/each_child_spec.rb b/spec/ruby/core/dir/each_child_spec.rb
new file mode 100644
index 0000000000..70f6f63333
--- /dev/null
+++ b/spec/ruby/core/dir/each_child_spec.rb
@@ -0,0 +1,53 @@
+require File.expand_path('../../../spec_helper', __FILE__)
+require File.expand_path('../fixtures/common', __FILE__)
+
+ruby_version_is "2.5" do
+  describe "Dir.each_child" do
+    before :all do
+      DirSpecs.create_mock_dirs
+    end
+
+    after :all do
+      DirSpecs.delete_mock_dirs
+    end
+
+    it "yields all names in an existing directory to the provided block" do
+      a, b = [], []
+
+      Dir.each_child(DirSpecs.mock_dir) {|f| a << f}
+      Dir.each_child("#{DirSpecs.mock_dir}/deeply/nested") {|f| b << f}
+
+      a.sort.should == DirSpecs.expected_paths -  %w[. ..]
+      b.sort.should == %w|.dotfile.ext directory|
+    end
+
+    it "returns nil when successful" do
+      Dir.each_child(DirSpecs.mock_dir) {|f| f}.should == nil
+    end
+
+    it "calls #to_path on non-String arguments" do
+      p = mock('path')
+      p.should_receive(:to_path).and_return(DirSpecs.mock_dir)
+      Dir.each_child(p).to_a
+    end
+
+    it "raises a SystemCallError if passed a nonexistent directory" do
+      lambda { Dir.each_child(DirSpecs.nonexistent) {} }.should raise_error(SystemCallError)
+    end
+
+    describe "when no block is given" do
+      it "returns an Enumerator" do
+        Dir.each_child(DirSpecs.mock_dir).should be_an_instance_of(Enumerator)
+        Dir.each_child(DirSpecs.mock_dir).to_a.sort.should == DirSpecs.expected_paths - %w[. ..]
+      end
+
+      describe "returned Enumerator" do
+        describe "size" do
+          it "should return nil" do
+            Dir.each_child(DirSpecs.mock_dir).size.should == nil
+          end
+        end
+      end
+    end
+  end
+end