String#each_grapheme_cluster and String#grapheme_clusters

added to enumerate grapheme clusters [Feature #13780]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@59698 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 40 insertions, 0 deletions

diff --git a/test/ruby/test_string.rb b/test/ruby/test_string.rb
index e88d749123..fb1cfdf68e 100644
--- a/test/ruby/test_string.rb
+++ b/test/ruby/test_string.rb
@@ -885,6 +885,46 @@ CODE
     end
   end
 
+  def test_each_grapheme_cluster
+    [
+      "\u{20 200d}",
+      "\u{600 600}",
+      "\u{600 20}",
+      "\u{261d 1F3FB}",
+      "\u{1f600}",
+      "\u{20 308}",
+      "\u{1F477 1F3FF 200D 2640 FE0F}",
+      "\u{1F468 200D 1F393}",
+      "\u{1F46F 200D 2642 FE0F}",
+      "\u{1f469 200d 2764 fe0f 200d 1f469}",
+    ].each do |g|
+      assert_equal [g], g.each_grapheme_cluster.to_a
+    end
+
+    assert_equal ["\u000A", "\u0308"], "\u{a 308}".each_grapheme_cluster.to_a
+    assert_equal ["\u000D", "\u0308"], "\u{d 308}".each_grapheme_cluster.to_a
+  end
+
+  def test_grapheme_clusters
+    [
+      "\u{20 200d}",
+      "\u{600 600}",
+      "\u{600 20}",
+      "\u{261d 1F3FB}",
+      "\u{1f600}",
+      "\u{20 308}",
+      "\u{1F477 1F3FF 200D 2640 FE0F}",
+      "\u{1F468 200D 1F393}",
+      "\u{1F46F 200D 2642 FE0F}",
+      "\u{1f469 200d 2764 fe0f 200d 1f469}",
+    ].each do |g|
+      assert_equal [g], g.grapheme_clusters
+    end
+
+    assert_equal ["\u000A", "\u0308"], "\u{a 308}".grapheme_clusters
+    assert_equal ["\u000D", "\u0308"], "\u{d 308}".grapheme_clusters
+  end
+
   def test_each_line
     save = $/
     $/ = "\n"