1 files changed, 59 insertions, 2 deletions
diff --git a/spec/ruby/core/file/absolute_path_spec.rb b/spec/ruby/core/file/absolute_path_spec.rb
index b1f4f05aee..fc12985a75 100644
--- a/spec/ruby/core/file/absolute_path_spec.rb
+++ b/spec/ruby/core/file/absolute_path_spec.rb
@@ -1,4 +1,55 @@
-require File.expand_path('../../../spec_helper', __FILE__)
+require_relative '../../spec_helper'
+
+describe "File.absolute_path?" do
+  before :each do
+    @abs = File.expand_path(__FILE__)
+  end
+
+  it "returns true if it's an absolute pathname" do
+    File.absolute_path?(@abs).should == true
+  end
+
+  it "returns false if it's a relative path" do
+    File.absolute_path?(File.basename(__FILE__)).should == false
+  end
+
+  it "returns false if it's a tricky relative path" do
+    File.absolute_path?("C:foo\\bar").should == false
+  end
+
+  it "does not expand '~' to a home directory." do
+    File.absolute_path?('~').should == false
+  end
+
+  it "does not expand '~user' to a home directory." do
+    path = File.dirname(@abs)
+    Dir.chdir(path) do
+      File.absolute_path?('~user').should == false
+    end
+  end
+
+  it "calls #to_path on its argument" do
+    mock = mock_to_path(File.expand_path(__FILE__))
+
+    File.absolute_path?(mock).should == true
+  end
+
+  platform_is_not :windows do
+    it "takes into consideration the platform's root" do
+      File.absolute_path?("C:\\foo\\bar").should == false
+      File.absolute_path?("C:/foo/bar").should == false
+      File.absolute_path?("/foo/bar\\baz").should == true
+    end
+  end
+
+  platform_is :windows do
+    it "takes into consideration the platform path separator(s)" do
+      File.absolute_path?("C:\\foo\\bar").should == true
+      File.absolute_path?("C:/foo/bar").should == true
+      File.absolute_path?("/foo/bar\\baz").should == false
+    end
+  end
+end
 
 describe "File.absolute_path" do
   before :each do
@@ -20,6 +71,12 @@ describe "File.absolute_path" do
     File.absolute_path('~').should_not == File.expand_path('~')
   end
 
+  platform_is_not :windows do
+    it "does not expand '~' when given dir argument" do
+      File.absolute_path('~', '/').should == '/~'
+    end
+  end
+
   it "does not expand '~user' to a home directory." do
     path = File.dirname(@abs)
     Dir.chdir(path) do
@@ -28,7 +85,7 @@ describe "File.absolute_path" do
   end
 
   it "accepts a second argument of a directory from which to resolve the path" do
-    File.absolute_path(__FILE__, File.dirname(__FILE__)).should == @abs
+    File.absolute_path(__FILE__, __dir__).should == @abs
   end
 
   it "calls #to_path on its argument" do