1 files changed, 103 insertions, 0 deletions
diff --git a/spec/ruby/language/regexp/encoding_spec.rb b/spec/ruby/language/regexp/encoding_spec.rb
new file mode 100644
index 0000000000..1f62244a28
--- /dev/null
+++ b/spec/ruby/language/regexp/encoding_spec.rb
@@ -0,0 +1,103 @@
+# -*- encoding: binary -*-
+require File.expand_path('../../../spec_helper', __FILE__)
+require File.expand_path('../../fixtures/classes', __FILE__)
+
+describe "Regexps with encoding modifiers" do
+  it "supports /e (EUC encoding)" do
+    match = /./e.match("\303\251".force_encoding(Encoding::EUC_JP))
+    match.to_a.should == ["\303\251".force_encoding(Encoding::EUC_JP)]
+  end
+
+  it "supports /e (EUC encoding) with interpolation" do
+    match = /#{/./}/e.match("\303\251".force_encoding(Encoding::EUC_JP))
+    match.to_a.should == ["\303\251".force_encoding(Encoding::EUC_JP)]
+  end
+
+  it "supports /e (EUC encoding) with interpolation /o" do
+    match = /#{/./}/e.match("\303\251".force_encoding(Encoding::EUC_JP))
+    match.to_a.should == ["\303\251".force_encoding(Encoding::EUC_JP)]
+  end
+
+  it 'uses EUC-JP as /e encoding' do
+    /./e.encoding.should == Encoding::EUC_JP
+  end
+
+  it 'preserves EUC-JP as /e encoding through interpolation' do
+    /#{/./}/e.encoding.should == Encoding::EUC_JP
+  end
+
+  it "supports /n (No encoding)" do
+    /./n.match("\303\251").to_a.should == ["\303"]
+  end
+
+  it "supports /n (No encoding) with interpolation" do
+    /#{/./}/n.match("\303\251").to_a.should == ["\303"]
+  end
+
+  it "supports /n (No encoding) with interpolation /o" do
+    /#{/./}/n.match("\303\251").to_a.should == ["\303"]
+  end
+
+  it 'uses US-ASCII as /n encoding if all chars are 7-bit' do
+    /./n.encoding.should == Encoding::US_ASCII
+  end
+
+  it 'uses ASCII-8BIT as /n encoding if not all chars are 7-bit' do
+    /\xFF/n.encoding.should == Encoding::ASCII_8BIT
+  end
+
+  it 'preserves US-ASCII as /n encoding through interpolation if all chars are 7-bit' do
+    /.#{/./}/n.encoding.should == Encoding::US_ASCII
+  end
+
+  it 'preserves ASCII-8BIT as /n encoding through interpolation if all chars are 7-bit' do
+    /\xFF#{/./}/n.encoding.should == Encoding::ASCII_8BIT
+  end
+
+  it "supports /s (Windows_31J encoding)" do
+    match = /./s.match("\303\251".force_encoding(Encoding::Windows_31J))
+    match.to_a.should == ["\303".force_encoding(Encoding::Windows_31J)]
+  end
+
+  it "supports /s (Windows_31J encoding) with interpolation" do
+    match = /#{/./}/s.match("\303\251".force_encoding(Encoding::Windows_31J))
+    match.to_a.should == ["\303".force_encoding(Encoding::Windows_31J)]
+  end
+
+  it "supports /s (Windows_31J encoding) with interpolation and /o" do
+    match = /#{/./}/s.match("\303\251".force_encoding(Encoding::Windows_31J))
+    match.to_a.should == ["\303".force_encoding(Encoding::Windows_31J)]
+  end
+
+  it 'uses Windows-31J as /s encoding' do
+    /./s.encoding.should == Encoding::Windows_31J
+  end
+
+  it 'preserves Windows-31J as /s encoding through interpolation' do
+    /#{/./}/s.encoding.should == Encoding::Windows_31J
+  end
+
+  it "supports /u (UTF8 encoding)" do
+    /./u.match("\303\251".force_encoding('utf-8')).to_a.should == ["\u{e9}"]
+  end
+
+  it "supports /u (UTF8 encoding) with interpolation" do
+    /#{/./}/u.match("\303\251".force_encoding('utf-8')).to_a.should == ["\u{e9}"]
+  end
+
+  it "supports /u (UTF8 encoding) with interpolation and /o" do
+    /#{/./}/u.match("\303\251".force_encoding('utf-8')).to_a.should == ["\u{e9}"]
+  end
+
+  it 'uses UTF-8 as /u encoding' do
+    /./u.encoding.should == Encoding::UTF_8
+  end
+
+  it 'preserves UTF-8 as /u encoding through interpolation' do
+    /#{/./}/u.encoding.should == Encoding::UTF_8
+  end
+
+  it "selects last of multiple encoding specifiers" do
+    /foo/ensuensuens.should == /foo/s
+  end
+end