add blockquote (>>>) formatting + test

src/Discord.Net.Core/Format.cs

@@ -44,7 +44,7 @@ namespace Discord
         ///     Formats a string as a quote.
         /// </summary>
         /// <param name="text">The text to format.</param>
-        /// <returns>Gets the formatted quote text.</returns> // TODO: better xmldoc
+        /// <returns>Gets the formatted quote text.</returns>
         public static string Quote(string text)
         {
             // do not modify null or whitespace text
@@ -77,5 +77,19 @@ namespace Discord
 
             return result.ToString();
         }
+        
+        /// <summary>
+        ///     Formats a string as a block quote.
+        /// </summary>
+        /// <param name="text">The text to format.</param>
+        /// <returns>Gets the formatted block quote text.</returns>
+        public static string BlockQuote(string text)
+        {
+            // do not modify null or whitespace
+            if (string.IsNullOrWhiteSpace(text))
+                return text;
+
+            return $">>> {text}";
+        }
     }
 }

test/Discord.Net.Tests.Unit/FormatTests.cs

@@ -46,5 +46,18 @@ namespace Discord
         {
             Assert.Equal(expected, Format.Quote(input));
         }
+        [Theory]
+        [InlineData(null, null)]
+        [InlineData("", "")]
+        [InlineData("\n", "\n")]
+        [InlineData("foo\n\nbar", ">>> foo\n\nbar")]
+        [InlineData("input", ">>> input")] // single line
+        // should work with CR or CRLF
+        [InlineData("inb4\ngreentext", ">>> inb4\ngreentext")]
+        [InlineData("inb4\r\ngreentext", ">>> inb4\r\ngreentext")]
+        public void BlockQuote(string input, string expected)
+        {
+            Assert.Equal(expected, Format.BlockQuote(input));
+        }
     }
 }