add empty? method for cheffs base dir class

add spec tests

2 files changed, 24 insertions, 5 deletions

diff --git a/lib/chef/chef_fs/file_system/base_fs_dir.rb b/lib/chef/chef_fs/file_system/base_fs_dir.rb
index 74038f481b..87e57285b8 100644
--- a/lib/chef/chef_fs/file_system/base_fs_dir.rb
+++ b/lib/chef/chef_fs/file_system/base_fs_dir.rb
@@ -40,6 +40,11 @@ class Chef
           true
         end
 
+        # A dir without children is empty
+        def empty?
+          children == []
+        end
+
         # Abstract: children
       end
     end
diff --git a/spec/unit/chef_fs/file_system_spec.rb b/spec/unit/chef_fs/file_system_spec.rb
index 383a2c81ab..7ac413857d 100644
--- a/spec/unit/chef_fs/file_system_spec.rb
+++ b/spec/unit/chef_fs/file_system_spec.rb
@@ -66,18 +66,19 @@ describe Chef::ChefFS::FileSystem do
             :c => '',
           }
         },
-        :x => ''
+        :x => '',
+        :y => {}
       })
     }
     context 'list' do
       it '/**' do
-        list_should_yield_paths(fs, '/**', '/', '/a', '/x', '/a/aa', '/a/aa/c', '/a/aa/zz', '/a/ab', '/a/ab/c')
+        list_should_yield_paths(fs, '/**', '/', '/a', '/x', '/y', '/a/aa', '/a/aa/c', '/a/aa/zz', '/a/ab', '/a/ab/c')
       end
       it '/' do
         list_should_yield_paths(fs, '/', '/')
       end
       it '/*' do
-        list_should_yield_paths(fs, '/*', '/', '/a', '/x')
+        list_should_yield_paths(fs, '/*', '/', '/a', '/x', '/y')
       end
       it '/*/*' do
         list_should_yield_paths(fs, '/*/*', '/a/aa', '/a/ab')
@@ -127,8 +128,21 @@ describe Chef::ChefFS::FileSystem do
       it 'resolves /a/aa/zz' do
         Chef::ChefFS::FileSystem.resolve_path(fs, '/a/aa/zz').path.should == '/a/aa/zz'
       end
-      it 'resolves nonexistent /y/x/w' do
-        Chef::ChefFS::FileSystem.resolve_path(fs, '/y/x/w').path.should == '/y/x/w'
+      it 'resolves nonexistent /q/x/w' do
+        Chef::ChefFS::FileSystem.resolve_path(fs, '/q/x/w').path.should == '/q/x/w'
+      end
+    end
+
+    context 'empty?' do
+      it 'is not empty /' do
+        Chef::ChefFS::FileSystem.resolve_path(fs, '/').empty?.should be false
+      end
+      it 'is empty /y' do
+        Chef::ChefFS::FileSystem.resolve_path(fs, '/y').empty?.should be true
+      end
+      it 'is not a directory and can\'t be tested /x' do
+#require 'pry'; binding.pry
+        lambda { Chef::ChefFS::FileSystem.resolve_path(fs, '/x').empty? }.should raise_error(NoMethodError)
       end
     end
   end