1 files changed, 45 insertions, 0 deletions
diff --git a/spec/ruby/core/encoding/converter/convert_spec.rb b/spec/ruby/core/encoding/converter/convert_spec.rb
new file mode 100644
index 0000000000..c95e88a491
--- /dev/null
+++ b/spec/ruby/core/encoding/converter/convert_spec.rb
@@ -0,0 +1,45 @@
+# encoding: binary
+# frozen_string_literal: true
+require_relative '../../../spec_helper'
+
+describe "Encoding::Converter#convert" do
+  it "returns a String" do
+    ec = Encoding::Converter.new('ascii', 'utf-8')
+    ec.convert('glark').should.instance_of?(String)
+  end
+
+  it "sets the encoding of the result to the target encoding" do
+    ec = Encoding::Converter.new('ascii', 'utf-8')
+    str = 'glark'.dup.force_encoding('ascii')
+    ec.convert(str).encoding.should == Encoding::UTF_8
+  end
+
+  it "transcodes the given String to the target encoding" do
+    ec = Encoding::Converter.new("utf-8", "euc-jp")
+    ec.convert("\u3042".dup.force_encoding('UTF-8')).should == \
+      "\xA4\xA2".dup.force_encoding('EUC-JP')
+  end
+
+  it "allows Strings of different encodings to the source encoding" do
+    ec = Encoding::Converter.new('ascii', 'utf-8')
+    str = 'glark'.dup.force_encoding('SJIS')
+    ec.convert(str).encoding.should == Encoding::UTF_8
+  end
+
+  it "reuses the given encoding pair if called multiple times" do
+    ec = Encoding::Converter.new('ascii', 'SJIS')
+    ec.convert('a'.dup.force_encoding('ASCII')).should == 'a'.dup.force_encoding('SJIS')
+    ec.convert('b'.dup.force_encoding('ASCII')).should == 'b'.dup.force_encoding('SJIS')
+  end
+
+  it "raises UndefinedConversionError if the String contains characters invalid for the target encoding" do
+    ec = Encoding::Converter.new('UTF-8', Encoding.find('macCyrillic'))
+    -> { ec.convert("\u{6543}".dup.force_encoding('UTF-8')) }.should.raise(Encoding::UndefinedConversionError)
+  end
+
+  it "raises an ArgumentError if called on a finished stream" do
+    ec = Encoding::Converter.new('UTF-8', Encoding.find('macCyrillic'))
+    ec.finish
+    -> { ec.convert("\u{65}") }.should.raise(ArgumentError)
+  end
+end