1 files changed, 85 insertions, 0 deletions
diff --git a/spec/ruby/core/encoding/converter/last_error_spec.rb b/spec/ruby/core/encoding/converter/last_error_spec.rb
new file mode 100644
index 0000000000..8465935368
--- /dev/null
+++ b/spec/ruby/core/encoding/converter/last_error_spec.rb
@@ -0,0 +1,85 @@
+# -*- encoding: binary -*-
+require File.expand_path('../../../../spec_helper', __FILE__)
+
+with_feature :encoding do
+  describe "Encoding::Converter#last_error" do
+    it "returns nil when the no conversion has been attempted" do
+      ec = Encoding::Converter.new('ascii','utf-8')
+      ec.last_error.should be_nil
+    end
+
+    it "returns nil when the last conversion did not produce an error" do
+      ec = Encoding::Converter.new('ascii','utf-8')
+      ec.convert('a'.force_encoding('ascii'))
+      ec.last_error.should be_nil
+    end
+
+    it "returns nil when #primitive_convert last returned :destination_buffer_full" do
+      ec = Encoding::Converter.new("utf-8", "iso-2022-jp")
+      ec.primitive_convert("\u{9999}", "", 0, 0, partial_input: false) \
+        .should == :destination_buffer_full
+      ec.last_error.should be_nil
+    end
+
+    it "returns nil when #primitive_convert last returned :finished" do
+      ec = Encoding::Converter.new("utf-8", "iso-8859-1")
+      ec.primitive_convert("glark".force_encoding('utf-8'),"").should == :finished
+      ec.last_error.should be_nil
+    end
+
+    it "returns nil if the last conversion succeeded but the penultimate failed" do
+      ec = Encoding::Converter.new("utf-8", "iso-8859-1")
+      ec.primitive_convert("\xf1abcd","").should == :invalid_byte_sequence
+      ec.primitive_convert("glark".force_encoding('utf-8'),"").should == :finished
+      ec.last_error.should be_nil
+    end
+
+    it "returns an Encoding::InvalidByteSequenceError when #primitive_convert last returned :invalid_byte_sequence" do
+      ec = Encoding::Converter.new("utf-8", "iso-8859-1")
+      ec.primitive_convert("\xf1abcd","").should == :invalid_byte_sequence
+      ec.last_error.should be_an_instance_of(Encoding::InvalidByteSequenceError)
+    end
+
+    it "returns an Encoding::UndefinedConversionError when #primitive_convert last returned :undefined_conversion" do
+      ec = Encoding::Converter.new("utf-8", "iso-8859-1")
+      ec.primitive_convert("\u{9876}","").should == :undefined_conversion
+      ec.last_error.should be_an_instance_of(Encoding::UndefinedConversionError)
+    end
+
+    it "returns an Encoding::InvalidByteSequenceError when #primitive_convert last returned :incomplete_input" do
+      ec = Encoding::Converter.new("EUC-JP", "ISO-8859-1")
+      ec.primitive_convert("\xa4", "", nil, 10).should == :incomplete_input
+      ec.last_error.should be_an_instance_of(Encoding::InvalidByteSequenceError)
+    end
+
+    it "returns an Encoding::InvalidByteSequenceError when the last call to #convert produced one" do
+      ec = Encoding::Converter.new("utf-8", "iso-8859-1")
+      exception = nil
+      lambda do
+        begin
+          ec.convert("\xf1abcd")
+        rescue Encoding::InvalidByteSequenceError => e
+          exception = e
+          raise e
+        end
+      end.should raise_error(Encoding::InvalidByteSequenceError)
+      ec.last_error.should be_an_instance_of(Encoding::InvalidByteSequenceError)
+      ec.last_error.message.should == exception.message
+    end
+
+    it "returns an Encoding::UndefinedConversionError when the last call to #convert produced one" do
+      ec = Encoding::Converter.new("utf-8", "iso-8859-1")
+      exception = nil
+      lambda do
+        begin
+          ec.convert("\u{9899}")
+        rescue Encoding::UndefinedConversionError => e
+          exception = e
+          raise e
+        end
+      end.should raise_error(Encoding::UndefinedConversionError)
+      ec.last_error.should be_an_instance_of(Encoding::UndefinedConversionError)
+      ec.last_error.message.should == exception.message
+    end
+  end
+end