1 files changed, 74 insertions, 0 deletions
diff --git a/spec/ruby/core/string/unicode_normalized_spec.rb b/spec/ruby/core/string/unicode_normalized_spec.rb
new file mode 100644
index 0000000000..dc5e2742e4
--- /dev/null
+++ b/spec/ruby/core/string/unicode_normalized_spec.rb
@@ -0,0 +1,74 @@
+# -*- encoding: utf-8 -*-
+require File.expand_path('../../../spec_helper', __FILE__)
+
+describe "String#unicode_normalized?" do
+  before :each do
+    @nfc_normalized_str = "\u1e9b\u0323"
+    @nfd_normalized_str = "\u017f\u0323\u0307"
+    @nfkc_normalized_str = "\u1e69"
+    @nfkd_normalized_str = "\u0073\u0323\u0307"
+  end
+
+  it "returns true if string is in the specified normalization form" do
+    @nfc_normalized_str.unicode_normalized?(:nfc).should == true
+    @nfd_normalized_str.unicode_normalized?(:nfd).should == true
+    @nfkc_normalized_str.unicode_normalized?(:nfkc).should == true
+    @nfkd_normalized_str.unicode_normalized?(:nfkd).should == true
+  end
+
+  it "returns false if string is not in the supplied normalization form" do
+    @nfd_normalized_str.unicode_normalized?(:nfc).should == false
+    @nfc_normalized_str.unicode_normalized?(:nfd).should == false
+    @nfc_normalized_str.unicode_normalized?(:nfkc).should == false
+    @nfc_normalized_str.unicode_normalized?(:nfkd).should == false
+  end
+
+  it "defaults to the nfc normalization form if no forms are specified" do
+    @nfc_normalized_str.unicode_normalized?.should == true
+    @nfd_normalized_str.unicode_normalized?.should == false
+  end
+
+  it "returns true if string is empty" do
+    "".unicode_normalized?.should == true
+  end
+
+  it "returns true if string does not contain any unicode codepoints" do
+    "abc".unicode_normalized?.should == true
+  end
+
+  it "raises an Encoding::CompatibilityError if the string is not in an unicode encoding" do
+    lambda { @nfc_normalized_str.force_encoding("ISO-8859-1").unicode_normalized? }.should raise_error(Encoding::CompatibilityError)
+  end
+
+  it "raises an ArgumentError if the specified form is invalid" do
+    lambda { @nfc_normalized_str.unicode_normalized?(:invalid_form) }.should raise_error(ArgumentError)
+  end
+
+  it "returns true if str is in Unicode normalization form (nfc)" do
+    str = "a\u0300"
+    str.unicode_normalized?(:nfc).should be_false
+    str.unicode_normalize!(:nfc)
+    str.unicode_normalized?(:nfc).should be_true
+  end
+
+  it "returns true if str is in Unicode normalization form (nfd)" do
+    str = "a\u00E0"
+    str.unicode_normalized?(:nfd).should be_false
+    str.unicode_normalize!(:nfd)
+    str.unicode_normalized?(:nfd).should be_true
+  end
+
+  it "returns true if str is in Unicode normalization form (nfkc)" do
+    str = "a\u0300"
+    str.unicode_normalized?(:nfkc).should be_false
+    str.unicode_normalize!(:nfkc)
+    str.unicode_normalized?(:nfkc).should be_true
+  end
+
+  it "returns true if str is in Unicode normalization form (nfkd)" do
+    str = "a\u00E0"
+    str.unicode_normalized?(:nfkd).should be_false
+    str.unicode_normalize!(:nfkd)
+    str.unicode_normalized?(:nfkd).should be_true
+  end
+end