1 files changed, 70 insertions, 0 deletions
diff --git a/spec/ruby/core/encoding/converter/replacement_spec.rb b/spec/ruby/core/encoding/converter/replacement_spec.rb
new file mode 100644
index 0000000000..c25ec36517
--- /dev/null
+++ b/spec/ruby/core/encoding/converter/replacement_spec.rb
@@ -0,0 +1,70 @@
+require_relative '../../../spec_helper'
+
+describe "Encoding::Converter#replacement" do
+  it "returns '?' in US-ASCII when the destination encoding is not UTF-8" do
+    ec = Encoding::Converter.new("utf-8", "us-ascii")
+    ec.replacement.should == "?"
+    ec.replacement.encoding.should == Encoding::US_ASCII
+
+    ec = Encoding::Converter.new("utf-8", "sjis")
+    ec.replacement.should == "?"
+    ec.replacement.encoding.should == Encoding::US_ASCII
+  end
+
+  it "returns \\uFFFD when the destination encoding is UTF-8" do
+    ec = Encoding::Converter.new("us-ascii", "utf-8")
+    ec.replacement.should == "\u{fffd}".dup.force_encoding('utf-8')
+    ec.replacement.encoding.should == Encoding::UTF_8
+  end
+end
+
+describe "Encoding::Converter#replacement=" do
+  it "accepts a String argument" do
+    ec = Encoding::Converter.new("utf-8", "us-ascii")
+    ec.replacement = "!"
+    ec.replacement.should == "!"
+  end
+
+  it "accepts a String argument of arbitrary length" do
+    ec = Encoding::Converter.new("utf-8", "us-ascii")
+    ec.replacement = "?!?" * 9999
+    ec.replacement.should == "?!?" * 9999
+  end
+
+  it "raises a TypeError if assigned a non-String argument" do
+    ec = Encoding::Converter.new("utf-8", "us-ascii")
+    -> { ec.replacement = nil }.should.raise(TypeError)
+  end
+
+  it "sets #replacement" do
+    ec = Encoding::Converter.new("us-ascii", "utf-8")
+    ec.replacement.should == "\u{fffd}".dup.force_encoding('utf-8')
+    ec.replacement = '?'.encode('utf-8')
+    ec.replacement.should == '?'.dup.force_encoding('utf-8')
+  end
+
+  it "raises an UndefinedConversionError is the argument cannot be converted into the destination encoding" do
+    ec = Encoding::Converter.new("sjis", "ascii")
+    utf8_q = "\u{986}".dup.force_encoding('utf-8')
+    ec.primitive_convert(utf8_q.dup, +"").should == :undefined_conversion
+    -> { ec.replacement = utf8_q }.should.raise(Encoding::UndefinedConversionError)
+  end
+
+  it "does not change the replacement character if the argument cannot be converted into the destination encoding" do
+    ec = Encoding::Converter.new("sjis", "ascii")
+    utf8_q = "\u{986}".dup.force_encoding('utf-8')
+    ec.primitive_convert(utf8_q.dup, +"").should == :undefined_conversion
+    -> { ec.replacement = utf8_q }.should.raise(Encoding::UndefinedConversionError)
+    ec.replacement.should == "?".dup.force_encoding('us-ascii')
+  end
+
+  it "uses the replacement character" do
+    ec = Encoding::Converter.new("utf-8", "us-ascii", :invalid => :replace, :undef => :replace)
+    ec.replacement = "!"
+    dest = +""
+    status = ec.primitive_convert(+"中文123", dest)
+
+    status.should == :finished
+    dest.should == "!!123"
+  end
+end