Add test for multiline strings in .po files

test/fixtures/en-2.po

@@ -0,0 +1,23 @@
+msgid ""
+msgstr ""
+"Language: en\n"
+"X-Generator: Twine\n"
+
+msgctxt "key1"
+msgid "key1-english"
+msgstr "key1-english"
+
+msgctxt "key3"
+msgid "key3-english"
+msgstr ""
+
+msgctxt "key4"
+msgid "key4"
+"multiline"
+msgstr "A multi"
+"line string\n"
+"can occur"
+
+msgctxt "key5"
+msgid "A new string"
+msgstr "A new string"

test/fixtures/test-output-9.txt

@@ -0,0 +1,21 @@
+[[Uncategorized]]
+	[key5]
+		en = A new string
+
+[[My Strings]]
+	[key1]
+		en = key1-english
+		tags = tag1
+		comment = This is a comment
+		es = key1-spanish
+		fr = key1-french
+	[key2]
+		en = key2-english
+		tags = tag2
+		fr = key2-french
+	[key3]
+		en = key3-english
+		tags = tag1,tag2
+		es = key3-spanish
+	[key4]
+		en = A multiline string\ncan occur

test/twine_test.rb

@@ -84,6 +84,14 @@ class TwineTest < Test::Unit::TestCase
     end
   end
 
+  def test_consume_string_file_5
+    Dir.mktmpdir do |dir|
+      output_path = File.join(dir, 'strings.txt')
+      Twine::Runner.run(%W(consume-string-file test/fixtures/strings-1.txt test/fixtures/en-2.po -o #{output_path} -l en -a))
+      assert_equal(File.read('test/fixtures/test-output-9.txt'), File.read(output_path))
+    end
+  end
+
   def test_generate_report_1
     Twine::Runner.run(%w(generate-report test/fixtures/strings-1.txt))
   end