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diff --git a/language/hyph-utf8/source/generic/hyph-utf8/spec/tex/hyphen/converter_spec.rb b/language/hyph-utf8/source/generic/hyph-utf8/spec/tex/hyphen/converter_spec.rb
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+++ b/language/hyph-utf8/source/generic/hyph-utf8/spec/tex/hyphen/converter_spec.rb
@@ -0,0 +1,38 @@
+require 'spec_helper'
+
+include TeX::Hyphen
+
+describe Converter do
+ describe '.scan_line' do
+ it "scans the line" do
+ eightbits, usv = Converter.scan_line "0xDF\tU+042F"
+ expect(eightbits).to eq 223
+ expect(usv).to eq 'Я'
+ end
+
+ it "can read an optional name" do
+ eightbits, usv, bool, name = Converter.scan_line "0x2E\tU+002E\t\tperiod"
+ expect(eightbits).to eq 46
+ expect(usv).to eq '.'
+ expect(bool).to eq 0
+ expect(name).to eq 'period'
+ end
+
+ it "doesn’t crash if there is no match" do
+ expect { Converter.scan_line "" }.not_to raise_exception
+ end
+
+ it "returns nil if there are no matches" do
+ b = Converter.scan_line "0x2F"
+ expect(b).to be_nil
+ end
+
+ it "can also have a useless strange entry" do
+ eightbits, usv, bool, name = Converter.scan_line "0x19\tU+0131\t1\tdotlessi"
+ expect(eightbits).to eq 25
+ expect(usv).to eq 'ı'
+ expect(bool).to eq 1
+ expect(name).to eq 'dotlessi'
+ end
+ end
+end