add boolean parsing variations (#2234)

* add boolean parsing variations

* another

* feedback

* feedback:

Author: danmoseley

src/benchmarks/micro/libraries/System.Buffers/Utf8ParserTests.cs

@@ -85,7 +85,7 @@ public IEnumerable<object> SByteValues
         public bool TryParseSByte(Utf8TestCase value) => Utf8Parser.TryParse(value.Utf8Bytes, out sbyte _, out int _);
 
         public IEnumerable<object> BooleanValues
-            => Perf_Boolean.StringValues.OfType<string>().Select(formatted => new Utf8TestCase(formatted));
+            => Perf_Boolean.ValidStringValues.OfType<string>().Select(formatted => new Utf8TestCase(formatted));
 
         [Benchmark]
         [ArgumentsSource(nameof(BooleanValues))]

src/benchmarks/micro/libraries/System.Runtime/Perf.Boolean.cs

@@ -12,20 +12,30 @@ namespace System.Tests
     [BenchmarkCategory(Categories.Libraries)]
     public class Perf_Boolean
     {
-        public static IEnumerable<object> StringValues => Values.Select(value => value.ToString()).ToArray();
-
+        public static IEnumerable<object> ValidStringValues => new string[]{
+            "true",
+            "false",
+            "TRUE",
+            "False",
+            " True "
+        };
+        public static IEnumerable<object> ValidAndInvalidStringValues => ValidStringValues.Concat(new string[]
+        {
+            "0",
+            "Bogus"
+        });
         public static IEnumerable<object> Values => new object[]
         {
             true,
             false
         };
 
         [Benchmark]
-        [ArgumentsSource(nameof(StringValues))]
+        [ArgumentsSource(nameof(ValidStringValues))]
         public bool Parse(string value) => bool.Parse(value);
 
         [Benchmark]
-        [ArgumentsSource(nameof(StringValues))]
+        [ArgumentsSource(nameof(ValidAndInvalidStringValues))]
         public bool TryParse(string value) => bool.TryParse(value, out _);
 
         [Benchmark]