1 files changed, 71 insertions, 0 deletions
diff --git a/spec/ruby/core/dir/fchdir_spec.rb b/spec/ruby/core/dir/fchdir_spec.rb
new file mode 100644
index 0000000000..bd1a92b05e
--- /dev/null
+++ b/spec/ruby/core/dir/fchdir_spec.rb
@@ -0,0 +1,71 @@
+require_relative '../../spec_helper'
+require_relative 'fixtures/common'
+
+platform_is_not :windows do
+  describe "Dir.fchdir" do
+    before :all do
+      DirSpecs.create_mock_dirs
+    end
+
+    after :all do
+      DirSpecs.delete_mock_dirs
+    end
+
+    before :each do
+      @original = Dir.pwd
+    end
+
+    after :each do
+      Dir.chdir(@original)
+    end
+
+    it "changes the current working directory to the directory specified by the integer file descriptor" do
+      dir = Dir.new(DirSpecs.mock_dir)
+      Dir.fchdir dir.fileno
+      Dir.pwd.should == DirSpecs.mock_dir
+    ensure
+      dir.close
+    end
+
+    it "returns 0 when successfully changing directory" do
+      dir = Dir.new(DirSpecs.mock_dir)
+      Dir.fchdir(dir.fileno).should == 0
+    ensure
+      dir.close
+    end
+
+    it "returns the value of the block when a block is given" do
+      dir = Dir.new(DirSpecs.mock_dir)
+      Dir.fchdir(dir.fileno) { :block_value }.should == :block_value
+    ensure
+      dir.close
+    end
+
+    it "changes to the specified directory for the duration of the block" do
+      dir = Dir.new(DirSpecs.mock_dir)
+      Dir.fchdir(dir.fileno) { Dir.pwd }.should == DirSpecs.mock_dir
+      Dir.pwd.should == @original
+    ensure
+      dir.close
+    end
+
+    it "raises a SystemCallError if the file descriptor given is not valid" do
+      -> { Dir.fchdir(-1) }.should.raise(SystemCallError, "Bad file descriptor - fchdir")
+      -> { Dir.fchdir(-1) { } }.should.raise(SystemCallError, "Bad file descriptor - fchdir")
+    end
+
+    it "raises a SystemCallError if the file descriptor given is not for a directory" do
+      -> { Dir.fchdir $stdout.fileno }.should.raise(SystemCallError, /(Not a directory|Invalid argument) - fchdir/)
+      -> { Dir.fchdir($stdout.fileno) { } }.should.raise(SystemCallError, /(Not a directory|Invalid argument) - fchdir/)
+    end
+  end
+end
+
+platform_is :windows do
+  describe "Dir.fchdir" do
+    it "raises NotImplementedError" do
+      -> { Dir.fchdir 1 }.should.raise(NotImplementedError)
+      -> { Dir.fchdir(1) { } }.should.raise(NotImplementedError)
+    end
+  end
+end