diff --git a/vendor/github.com/stretchr/testify/assert/assertion_compare.go b/vendor/github.com/stretchr/testify/assert/assertion_compare.go
new file mode 100644
index 0000000..41649d2
--- /dev/null
+++ b/vendor/github.com/stretchr/testify/assert/assertion_compare.go
@@ -0,0 +1,394 @@
+package assert
+
+import (
+	"fmt"
+	"reflect"
+)
+
+type CompareType int
+
+const (
+	compareLess CompareType = iota - 1
+	compareEqual
+	compareGreater
+)
+
+var (
+	intType   = reflect.TypeOf(int(1))
+	int8Type  = reflect.TypeOf(int8(1))
+	int16Type = reflect.TypeOf(int16(1))
+	int32Type = reflect.TypeOf(int32(1))
+	int64Type = reflect.TypeOf(int64(1))
+
+	uintType   = reflect.TypeOf(uint(1))
+	uint8Type  = reflect.TypeOf(uint8(1))
+	uint16Type = reflect.TypeOf(uint16(1))
+	uint32Type = reflect.TypeOf(uint32(1))
+	uint64Type = reflect.TypeOf(uint64(1))
+
+	float32Type = reflect.TypeOf(float32(1))
+	float64Type = reflect.TypeOf(float64(1))
+
+	stringType = reflect.TypeOf("")
+)
+
+func compare(obj1, obj2 interface{}, kind reflect.Kind) (CompareType, bool) {
+	obj1Value := reflect.ValueOf(obj1)
+	obj2Value := reflect.ValueOf(obj2)
+
+	// throughout this switch we try and avoid calling .Convert() if possible,
+	// as this has a pretty big performance impact
+	switch kind {
+	case reflect.Int:
+		{
+			intobj1, ok := obj1.(int)
+			if !ok {
+				intobj1 = obj1Value.Convert(intType).Interface().(int)
+			}
+			intobj2, ok := obj2.(int)
+			if !ok {
+				intobj2 = obj2Value.Convert(intType).Interface().(int)
+			}
+			if intobj1 > intobj2 {
+				return compareGreater, true
+			}
+			if intobj1 == intobj2 {
+				return compareEqual, true
+			}
+			if intobj1 < intobj2 {
+				return compareLess, true
+			}
+		}
+	case reflect.Int8:
+		{
+			int8obj1, ok := obj1.(int8)
+			if !ok {
+				int8obj1 = obj1Value.Convert(int8Type).Interface().(int8)
+			}
+			int8obj2, ok := obj2.(int8)
+			if !ok {
+				int8obj2 = obj2Value.Convert(int8Type).Interface().(int8)
+			}
+			if int8obj1 > int8obj2 {
+				return compareGreater, true
+			}
+			if int8obj1 == int8obj2 {
+				return compareEqual, true
+			}
+			if int8obj1 < int8obj2 {
+				return compareLess, true
+			}
+		}
+	case reflect.Int16:
+		{
+			int16obj1, ok := obj1.(int16)
+			if !ok {
+				int16obj1 = obj1Value.Convert(int16Type).Interface().(int16)
+			}
+			int16obj2, ok := obj2.(int16)
+			if !ok {
+				int16obj2 = obj2Value.Convert(int16Type).Interface().(int16)
+			}
+			if int16obj1 > int16obj2 {
+				return compareGreater, true
+			}
+			if int16obj1 == int16obj2 {
+				return compareEqual, true
+			}
+			if int16obj1 < int16obj2 {
+				return compareLess, true
+			}
+		}
+	case reflect.Int32:
+		{
+			int32obj1, ok := obj1.(int32)
+			if !ok {
+				int32obj1 = obj1Value.Convert(int32Type).Interface().(int32)
+			}
+			int32obj2, ok := obj2.(int32)
+			if !ok {
+				int32obj2 = obj2Value.Convert(int32Type).Interface().(int32)
+			}
+			if int32obj1 > int32obj2 {
+				return compareGreater, true
+			}
+			if int32obj1 == int32obj2 {
+				return compareEqual, true
+			}
+			if int32obj1 < int32obj2 {
+				return compareLess, true
+			}
+		}
+	case reflect.Int64:
+		{
+			int64obj1, ok := obj1.(int64)
+			if !ok {
+				int64obj1 = obj1Value.Convert(int64Type).Interface().(int64)
+			}
+			int64obj2, ok := obj2.(int64)
+			if !ok {
+				int64obj2 = obj2Value.Convert(int64Type).Interface().(int64)
+			}
+			if int64obj1 > int64obj2 {
+				return compareGreater, true
+			}
+			if int64obj1 == int64obj2 {
+				return compareEqual, true
+			}
+			if int64obj1 < int64obj2 {
+				return compareLess, true
+			}
+		}
+	case reflect.Uint:
+		{
+			uintobj1, ok := obj1.(uint)
+			if !ok {
+				uintobj1 = obj1Value.Convert(uintType).Interface().(uint)
+			}
+			uintobj2, ok := obj2.(uint)
+			if !ok {
+				uintobj2 = obj2Value.Convert(uintType).Interface().(uint)
+			}
+			if uintobj1 > uintobj2 {
+				return compareGreater, true
+			}
+			if uintobj1 == uintobj2 {
+				return compareEqual, true
+			}
+			if uintobj1 < uintobj2 {
+				return compareLess, true
+			}
+		}
+	case reflect.Uint8:
+		{
+			uint8obj1, ok := obj1.(uint8)
+			if !ok {
+				uint8obj1 = obj1Value.Convert(uint8Type).Interface().(uint8)
+			}
+			uint8obj2, ok := obj2.(uint8)
+			if !ok {
+				uint8obj2 = obj2Value.Convert(uint8Type).Interface().(uint8)
+			}
+			if uint8obj1 > uint8obj2 {
+				return compareGreater, true
+			}
+			if uint8obj1 == uint8obj2 {
+				return compareEqual, true
+			}
+			if uint8obj1 < uint8obj2 {
+				return compareLess, true
+			}
+		}
+	case reflect.Uint16:
+		{
+			uint16obj1, ok := obj1.(uint16)
+			if !ok {
+				uint16obj1 = obj1Value.Convert(uint16Type).Interface().(uint16)
+			}
+			uint16obj2, ok := obj2.(uint16)
+			if !ok {
+				uint16obj2 = obj2Value.Convert(uint16Type).Interface().(uint16)
+			}
+			if uint16obj1 > uint16obj2 {
+				return compareGreater, true
+			}
+			if uint16obj1 == uint16obj2 {
+				return compareEqual, true
+			}
+			if uint16obj1 < uint16obj2 {
+				return compareLess, true
+			}
+		}
+	case reflect.Uint32:
+		{
+			uint32obj1, ok := obj1.(uint32)
+			if !ok {
+				uint32obj1 = obj1Value.Convert(uint32Type).Interface().(uint32)
+			}
+			uint32obj2, ok := obj2.(uint32)
+			if !ok {
+				uint32obj2 = obj2Value.Convert(uint32Type).Interface().(uint32)
+			}
+			if uint32obj1 > uint32obj2 {
+				return compareGreater, true
+			}
+			if uint32obj1 == uint32obj2 {
+				return compareEqual, true
+			}
+			if uint32obj1 < uint32obj2 {
+				return compareLess, true
+			}
+		}
+	case reflect.Uint64:
+		{
+			uint64obj1, ok := obj1.(uint64)
+			if !ok {
+				uint64obj1 = obj1Value.Convert(uint64Type).Interface().(uint64)
+			}
+			uint64obj2, ok := obj2.(uint64)
+			if !ok {
+				uint64obj2 = obj2Value.Convert(uint64Type).Interface().(uint64)
+			}
+			if uint64obj1 > uint64obj2 {
+				return compareGreater, true
+			}
+			if uint64obj1 == uint64obj2 {
+				return compareEqual, true
+			}
+			if uint64obj1 < uint64obj2 {
+				return compareLess, true
+			}
+		}
+	case reflect.Float32:
+		{
+			float32obj1, ok := obj1.(float32)
+			if !ok {
+				float32obj1 = obj1Value.Convert(float32Type).Interface().(float32)
+			}
+			float32obj2, ok := obj2.(float32)
+			if !ok {
+				float32obj2 = obj2Value.Convert(float32Type).Interface().(float32)
+			}
+			if float32obj1 > float32obj2 {
+				return compareGreater, true
+			}
+			if float32obj1 == float32obj2 {
+				return compareEqual, true
+			}
+			if float32obj1 < float32obj2 {
+				return compareLess, true
+			}
+		}
+	case reflect.Float64:
+		{
+			float64obj1, ok := obj1.(float64)
+			if !ok {
+				float64obj1 = obj1Value.Convert(float64Type).Interface().(float64)
+			}
+			float64obj2, ok := obj2.(float64)
+			if !ok {
+				float64obj2 = obj2Value.Convert(float64Type).Interface().(float64)
+			}
+			if float64obj1 > float64obj2 {
+				return compareGreater, true
+			}
+			if float64obj1 == float64obj2 {
+				return compareEqual, true
+			}
+			if float64obj1 < float64obj2 {
+				return compareLess, true
+			}
+		}
+	case reflect.String:
+		{
+			stringobj1, ok := obj1.(string)
+			if !ok {
+				stringobj1 = obj1Value.Convert(stringType).Interface().(string)
+			}
+			stringobj2, ok := obj2.(string)
+			if !ok {
+				stringobj2 = obj2Value.Convert(stringType).Interface().(string)
+			}
+			if stringobj1 > stringobj2 {
+				return compareGreater, true
+			}
+			if stringobj1 == stringobj2 {
+				return compareEqual, true
+			}
+			if stringobj1 < stringobj2 {
+				return compareLess, true
+			}
+		}
+	}
+
+	return compareEqual, false
+}
+
+// Greater asserts that the first element is greater than the second
+//
+//    assert.Greater(t, 2, 1)
+//    assert.Greater(t, float64(2), float64(1))
+//    assert.Greater(t, "b", "a")
+func Greater(t TestingT, e1 interface{}, e2 interface{}, msgAndArgs ...interface{}) bool {
+	return compareTwoValues(t, e1, e2, []CompareType{compareGreater}, "\"%v\" is not greater than \"%v\"", msgAndArgs)
+}
+
+// GreaterOrEqual asserts that the first element is greater than or equal to the second
+//
+//    assert.GreaterOrEqual(t, 2, 1)
+//    assert.GreaterOrEqual(t, 2, 2)
+//    assert.GreaterOrEqual(t, "b", "a")
+//    assert.GreaterOrEqual(t, "b", "b")
+func GreaterOrEqual(t TestingT, e1 interface{}, e2 interface{}, msgAndArgs ...interface{}) bool {
+	return compareTwoValues(t, e1, e2, []CompareType{compareGreater, compareEqual}, "\"%v\" is not greater than or equal to \"%v\"", msgAndArgs)
+}
+
+// Less asserts that the first element is less than the second
+//
+//    assert.Less(t, 1, 2)
+//    assert.Less(t, float64(1), float64(2))
+//    assert.Less(t, "a", "b")
+func Less(t TestingT, e1 interface{}, e2 interface{}, msgAndArgs ...interface{}) bool {
+	return compareTwoValues(t, e1, e2, []CompareType{compareLess}, "\"%v\" is not less than \"%v\"", msgAndArgs)
+}
+
+// LessOrEqual asserts that the first element is less than or equal to the second
+//
+//    assert.LessOrEqual(t, 1, 2)
+//    assert.LessOrEqual(t, 2, 2)
+//    assert.LessOrEqual(t, "a", "b")
+//    assert.LessOrEqual(t, "b", "b")
+func LessOrEqual(t TestingT, e1 interface{}, e2 interface{}, msgAndArgs ...interface{}) bool {
+	return compareTwoValues(t, e1, e2, []CompareType{compareLess, compareEqual}, "\"%v\" is not less than or equal to \"%v\"", msgAndArgs)
+}
+
+// Positive asserts that the specified element is positive
+//
+//    assert.Positive(t, 1)
+//    assert.Positive(t, 1.23)
+func Positive(t TestingT, e interface{}, msgAndArgs ...interface{}) bool {
+	zero := reflect.Zero(reflect.TypeOf(e))
+	return compareTwoValues(t, e, zero.Interface(), []CompareType{compareGreater}, "\"%v\" is not positive", msgAndArgs)
+}
+
+// Negative asserts that the specified element is negative
+//
+//    assert.Negative(t, -1)
+//    assert.Negative(t, -1.23)
+func Negative(t TestingT, e interface{}, msgAndArgs ...interface{}) bool {
+	zero := reflect.Zero(reflect.TypeOf(e))
+	return compareTwoValues(t, e, zero.Interface(), []CompareType{compareLess}, "\"%v\" is not negative", msgAndArgs)
+}
+
+func compareTwoValues(t TestingT, e1 interface{}, e2 interface{}, allowedComparesResults []CompareType, failMessage string, msgAndArgs ...interface{}) bool {
+	if h, ok := t.(tHelper); ok {
+		h.Helper()
+	}
+
+	e1Kind := reflect.ValueOf(e1).Kind()
+	e2Kind := reflect.ValueOf(e2).Kind()
+	if e1Kind != e2Kind {
+		return Fail(t, "Elements should be the same type", msgAndArgs...)
+	}
+
+	compareResult, isComparable := compare(e1, e2, e1Kind)
+	if !isComparable {
+		return Fail(t, fmt.Sprintf("Can not compare type \"%s\"", reflect.TypeOf(e1)), msgAndArgs...)
+	}
+
+	if !containsValue(allowedComparesResults, compareResult) {
+		return Fail(t, fmt.Sprintf(failMessage, e1, e2), msgAndArgs...)
+	}
+
+	return true
+}
+
+func containsValue(values []CompareType, value CompareType) bool {
+	for _, v := range values {
+		if v == value {
+			return true
+		}
+	}
+
+	return false
+}