Added the start of a unit test for issue #580

UnitTests/Text/TextToFlowedTests.cs

@@ -140,5 +140,44 @@ public void TestSpaceStuffingLinesStartingWithSpace ()
 
 			Assert.AreEqual (text, result);
 		}
+
+		[Test]
+		public void TestFlowingLongLines ()
+		{
+			string text = "But, soft! what light through yonder window breaks? " +
+				"It is the east, and Juliet is the sun. " +
+				"Arise, fair sun, and kill the envious moon, " +
+				"Who is already sick and pale with grief, " +
+				"That thou her maid art far more fair than she: " +
+				"Be not her maid, since she is envious; " +
+				"Her vestal livery is but sick and green " +
+				"And none but fools do wear it; cast it off. " +
+				"It is my lady, O, it is my love! " +
+				"O, that she knew she were! " +
+				"She speaks yet she says nothing: what of that? " +
+				"Her eye discourses; I will answer it. " +
+				"I am too bold, 'tis not to me she speaks: " +
+				"Two of the fairest stars in all the heaven, " +
+				"Having some business, do entreat her eyes " +
+				"To twinkle in their spheres till they return. " +
+				"What if her eyes were there, they in her head? " +
+				"The brightness of her cheek would shame those stars, " +
+				"As daylight doth a lamp; her eyes in heaven " +
+				"Would through the airy region stream so bright " +
+				"That birds would sing and think it were not night. " +
+				"See, how she leans her cheek upon her hand! " +
+				"O, that I were a glove upon that hand, " +
+				"That I might touch that cheek!" + Environment.NewLine;
+			const string expected = "";
+			TextConverter converter = new TextToFlowed ();
+			string result = converter.Convert (text);
+
+			Assert.AreEqual (expected, result);
+
+			converter = new FlowedToText ();
+			result = converter.Convert (expected);
+
+			Assert.AreEqual (text, result);
+		}
 	}
 }