removed local readme.md and extended HumanBytesExtensionsTests

Author: AndrewMorgan1

src/ByteFlow/ByteFlow/README.md

@@ -26,10 +26,10 @@ public void ToHumanBytes_ShouldRespectDecimalPlaces()
         [InlineData("1 KB", 1024)]
         [InlineData("1 MB", 1048576)]
         [InlineData("2.5 GB", 2684354560)]
-        [InlineData("1B", 1)]           // no space, raw bytes
-        [InlineData("1KB", 1024)]       // no space before suffix
-        [InlineData(" 1 MB", 1048576)]  // leading space
-        [InlineData("2 GB ", 2147483648)] // trailing space
+        [InlineData("1B", 1)]
+        [InlineData("1KB", 1024)]
+        [InlineData(" 1 MB", 1048576)]
+        [InlineData("2 GB ", 2147483648)]
         public void ToBytes_ShouldParseCorrectly(string input, long expected)
         {
             long result = input.ToBytes();
@@ -42,6 +42,23 @@ public void ToBytes_InvalidString_ShouldThrow()
             Assert.Throws<FormatException>(() => "invalid".ToBytes());
         }
 
+        [Theory]
+        [InlineData("1 XB")]       // unsupported unit
+        [InlineData("ten MB")]     // not a number
+        [InlineData("1.2.3 GB")]   // malformed number
+        [InlineData(" ")]          // empty after trim
+        public void ToBytes_InvalidInputs_ShouldThrow(string input)
+        {
+            Assert.ThrowsAny<Exception>(() => input.ToBytes());
+        }
+
+        [Fact]
+        public void ToBytes_Null_ShouldThrow()
+        {
+            string input = null;
+            Assert.Throws<ArgumentNullException>(() => input.ToBytes());
+        }
+
         [Fact]
         public void TryParseHumanBytes_ShouldReturnFalseOnInvalidInput()
         {
@@ -50,5 +67,19 @@ public void TryParseHumanBytes_ShouldReturnFalseOnInvalidInput()
             Assert.False(success);
             Assert.Equal(0, result);
         }
+
+        [Theory]
+        [InlineData("1 XB")]
+        [InlineData("ten MB")]
+        [InlineData("1.2.3 GB")]
+        [InlineData(" ")]
+        [InlineData(null)]
+        public void TryParseHumanBytes_InvalidInputs_ShouldReturnFalse(string input)
+        {
+            bool success = input.TryParseHumanBytes(out long result);
+
+            Assert.False(success);
+            Assert.Equal(0, result);
+        }
     }
 }