From 56b041d24524cd1c97beac7d10a247a987fb7249 Mon Sep 17 00:00:00 2001
From: Luciano Gaube <lucianogaube@gmail.com>
Date: Tue, 4 Jun 2019 14:46:46 +0100
Subject: [PATCH] Fix issue #819

Add new overload for Minus Operator
---
 src/Humanizer.Tests.Shared/Bytes/ArithmeticTests.cs | 13 ++++++++++++-
 src/Humanizer/Bytes/ByteSize.cs                     |  5 +++++
 2 files changed, 17 insertions(+), 1 deletion(-)

diff --git a/src/Humanizer.Tests.Shared/Bytes/ArithmeticTests.cs b/src/Humanizer.Tests.Shared/Bytes/ArithmeticTests.cs
index 6d791c8e5..251af9494 100644
--- a/src/Humanizer.Tests.Shared/Bytes/ArithmeticTests.cs
+++ b/src/Humanizer.Tests.Shared/Bytes/ArithmeticTests.cs
@@ -99,7 +99,7 @@ public void IncrementOperator()
         }
 
         [Fact]
-        public void MinusOperator()
+        public void NegativeOperator()
         {
             var size = ByteSize.FromBytes(2);
 
@@ -129,5 +129,16 @@ public void PlusOperator()
 
             Assert.Equal(2, result.Bytes);
         }
+
+        [Fact]
+        public void MinusOperator()
+        {
+            var size1 = ByteSize.FromBytes(2);
+            var size2 = ByteSize.FromBytes(1);
+
+            var result = size1 - size2;
+
+            Assert.Equal(1, result.Bytes);
+        }
     }
 }
diff --git a/src/Humanizer/Bytes/ByteSize.cs b/src/Humanizer/Bytes/ByteSize.cs
index 5863e9bc0..2c9fe5e36 100644
--- a/src/Humanizer/Bytes/ByteSize.cs
+++ b/src/Humanizer/Bytes/ByteSize.cs
@@ -398,6 +398,11 @@ public ByteSize Subtract(ByteSize bs)
             return new ByteSize(b1.Bytes + b2.Bytes);
         }
 
+        public static ByteSize operator -(ByteSize b1, ByteSize b2)
+        {
+            return new ByteSize(b1.Bytes - b2.Bytes);
+        }
+
         public static ByteSize operator ++(ByteSize b)
         {
             return new ByteSize(b.Bytes + 1);