Copy added tests from #135

Author: nblumhardt

test/Serilog.Sinks.Console.Tests/Output/OutputTemplateRendererTests.cs

@@ -105,11 +105,27 @@ public void FixedLengthLevelIsSupported(
             int width,
             string expected)
         {
-            var formatter = new OutputTemplateRenderer(ConsoleTheme.None, $"{{Level:t{width}}}", CultureInfo.InvariantCulture);
+            var formatter1 = new OutputTemplateRenderer(ConsoleTheme.None, $"{{Level:t{width}}}", CultureInfo.InvariantCulture);
             var evt = DelegatingSink.GetLogEvent(l => l.Write(level, "Hello"));
+            var evt1 = DelegatingSink.GetLogEvent(l => l.Write(level, "Hello"));
             var sw = new StringWriter();
+            var sw1 = new StringWriter();
             formatter.Format(evt, sw);
+            formatter1.Format(evt1, sw1);
             Assert.Equal(expected, sw.ToString());
+            Assert.Equal(expected, sw1.ToString());
+
+            var formatter2 = new OutputTemplateRenderer(ConsoleTheme.None, $"{{Level:u{width}}}", CultureInfo.InvariantCulture);
+            var evt2 = DelegatingSink.GetLogEvent(l => l.Write(level, "Hello"));
+            var sw2 = new StringWriter();
+            formatter2.Format(evt2, sw2);
+            Assert.Equal(expected.ToUpper(), sw2.ToString());
+
+            var formatter3 = new OutputTemplateRenderer(ConsoleTheme.None, $"{{Level:w{width}}}", CultureInfo.InvariantCulture);
+            var evt3 = DelegatingSink.GetLogEvent(l => l.Write(level, "Hello"));
+            var sw3 = new StringWriter();
+            formatter3.Format(evt3, sw3);
+            Assert.Equal(expected.ToLower(), sw3.ToString());
         }
 
         [Fact]