diff --git a/util/ints/ints_test.go b/util/ints/ints_test.go
new file mode 100644
index 00000000..5faed5ed
--- /dev/null
+++ b/util/ints/ints_test.go
@@ -0,0 +1,58 @@
+// Copyright © 2016 Abcum Ltd
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package ints
+
+import (
+	"testing"
+
+	. "github.com/smartystreets/goconvey/convey"
+)
+
+func TestDiff(t *testing.T) {
+
+	Convey("Check minimum", t, func() {
+		So(Min(15, 37, 10, 23), ShouldEqual, 10)
+		So(Min(15, 37, 16, 23), ShouldEqual, 15)
+	})
+
+	Convey("Check maximum", t, func() {
+		So(Max(15, 37, 10, 23), ShouldEqual, 37)
+		So(Max(40, 37, 16, 23), ShouldEqual, 40)
+	})
+
+	Convey("Check below", t, func() {
+		So(Below(20, 10), ShouldEqual, 10)
+		So(Below(20, 20), ShouldEqual, 20)
+		So(Below(20, 30), ShouldEqual, 20)
+	})
+
+	Convey("Check above", t, func() {
+		So(Above(20, 10), ShouldEqual, 20)
+		So(Above(20, 20), ShouldEqual, 20)
+		So(Above(20, 30), ShouldEqual, 30)
+	})
+
+	Convey("Check between", t, func() {
+		So(Between(1, 1, 0), ShouldEqual, 1)
+		So(Between(1, 1, 1), ShouldEqual, 1)
+		So(Between(1, 1, 2), ShouldEqual, 1)
+		So(Between(1, 10, 0), ShouldEqual, 1)
+		So(Between(1, 10, 1), ShouldEqual, 1)
+		So(Between(1, 10, 5), ShouldEqual, 5)
+		So(Between(1, 10, 10), ShouldEqual, 10)
+		So(Between(1, 10, 15), ShouldEqual, 10)
+	})
+
+}