1 files changed, 124 insertions, 0 deletions
diff --git a/spec/ruby/core/dir/chdir_spec.rb b/spec/ruby/core/dir/chdir_spec.rb
new file mode 100644
index 0000000000..f5b0b80d1c
--- /dev/null
+++ b/spec/ruby/core/dir/chdir_spec.rb
@@ -0,0 +1,124 @@
+require File.expand_path('../../../spec_helper', __FILE__)
+require File.expand_path('../fixtures/common', __FILE__)
+
+describe "Dir.chdir" 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 "defaults to $HOME with no arguments" do
+    if ENV['HOME']
+      Dir.chdir
+      current_dir = Dir.pwd
+
+      Dir.chdir(ENV['HOME'])
+      home = Dir.pwd
+      current_dir.should == home
+    end
+  end
+
+  it "changes to the specified directory" do
+    Dir.chdir DirSpecs.mock_dir
+    Dir.pwd.should == DirSpecs.mock_dir
+  end
+
+  it "returns 0 when successfully changing directory" do
+    Dir.chdir(@original).should == 0
+  end
+
+  it "calls #to_str on the argument if it's not a String" do
+    obj = mock('path')
+    obj.should_receive(:to_str).and_return(Dir.pwd)
+    Dir.chdir(obj)
+  end
+
+  it "calls #to_str on the argument if it's not a String and a block is given" do
+    obj = mock('path')
+    obj.should_receive(:to_str).and_return(Dir.pwd)
+    Dir.chdir(obj) { }
+  end
+
+  it "calls #to_path on the argument if it's not a String" do
+    obj = mock('path')
+    obj.should_receive(:to_path).and_return(Dir.pwd)
+    Dir.chdir(obj)
+  end
+
+  it "prefers #to_path over #to_str" do
+    obj = Class.new do
+      def to_path; Dir.pwd; end
+      def to_str;  DirSpecs.mock_dir; end
+    end
+    Dir.chdir(obj.new)
+    Dir.pwd.should == @original
+  end
+
+  it "returns the value of the block when a block is given" do
+    Dir.chdir(@original) { :block_value }.should == :block_value
+  end
+
+  it "defaults to the home directory when given a block but no argument" do
+    # Windows will return a path with forward slashes for ENV["HOME"] so we have
+    # to compare the route representations returned by Dir.chdir.
+    current_dir = ""
+    Dir.chdir { current_dir = Dir.pwd }
+
+    Dir.chdir(ENV['HOME'])
+    home = Dir.pwd
+    current_dir.should == home
+  end
+
+  it "changes to the specified directory for the duration of the block" do
+    ar = Dir.chdir(DirSpecs.mock_dir) { |dir| [dir, Dir.pwd] }
+    ar.should == [DirSpecs.mock_dir, DirSpecs.mock_dir]
+
+    Dir.pwd.should == @original
+  end
+
+  it "raises an Errno::ENOENT if the directory does not exist" do
+    lambda { Dir.chdir DirSpecs.nonexistent }.should raise_error(Errno::ENOENT)
+    lambda { Dir.chdir(DirSpecs.nonexistent) { } }.should raise_error(Errno::ENOENT)
+  end
+
+  it "raises an Errno::ENOENT if the original directory no longer exists" do
+    dir1 = tmp('/testdir1')
+    dir2 = tmp('/testdir2')
+    File.exist?(dir1).should == false
+    File.exist?(dir2).should == false
+    Dir.mkdir dir1
+    Dir.mkdir dir2
+    begin
+      lambda {
+        Dir.chdir dir1 do
+          Dir.chdir(dir2) { Dir.unlink dir1 }
+        end
+      }.should raise_error(Errno::ENOENT)
+    ensure
+      Dir.unlink dir1 if File.exist?(dir1)
+      Dir.unlink dir2 if File.exist?(dir2)
+    end
+  end
+
+  it "always returns to the original directory when given a block" do
+    begin
+      Dir.chdir(DirSpecs.mock_dir) do
+        raise StandardError, "something bad happened"
+      end
+    rescue StandardError
+    end
+
+    Dir.pwd.should == @original
+  end
+end