resources/images: Fix TestColorLuminance on s390x

2 files changed, 11 insertions, 4 deletions

diff --git a/htesting/hqt/checkers.go b/htesting/hqt/checkers.go
index 7655d6a63..bf2cb9428 100644
--- a/htesting/hqt/checkers.go
+++ b/htesting/hqt/checkers.go
@@ -16,6 +16,7 @@ package hqt
 import (
 	"errors"
 	"fmt"
+	"math"
 	"reflect"
 	"strings"
 
@@ -38,6 +39,11 @@ var IsSameType qt.Checker = &typeChecker{
 	argNames: []string{"got", "want"},
 }
 
+// IsSameFloat64 asserts that two float64 values are equal within a small delta.
+var IsSameFloat64 = qt.CmpEquals(cmp.Comparer(func(a, b float64) bool {
+	return math.Abs(a-b) < 0.0001
+}))
+
 type argNames []string
 
 func (a argNames) ArgNames() []string {
diff --git a/resources/images/color_test.go b/resources/images/color_test.go
index cbbc76cf9..3a75c068e 100644
--- a/resources/images/color_test.go
+++ b/resources/images/color_test.go
@@ -18,6 +18,7 @@ import (
 	"testing"
 
 	qt "github.com/frankban/quicktest"
+	"github.com/gohugoio/hugo/htesting/hqt"
 )
 
 func TestHexStringToColor(t *testing.T) {
@@ -119,8 +120,8 @@ func TestReplaceColorInPalette(t *testing.T) {
 
 func TestColorLuminance(t *testing.T) {
 	c := qt.New(t)
-	c.Assert(hexStringToColor("#000000").Luminance(), qt.Equals, 0.0)
-	c.Assert(hexStringToColor("#768a9a").Luminance(), qt.Equals, 0.24361603589088263)
-	c.Assert(hexStringToColor("#d5bc9f").Luminance(), qt.Equals, 0.5261577672685374)
-	c.Assert(hexStringToColor("#ffffff").Luminance(), qt.Equals, 1.0)
+	c.Assert(hexStringToColor("#000000").Luminance(), hqt.IsSameFloat64, 0.0)
+	c.Assert(hexStringToColor("#768a9a").Luminance(), hqt.IsSameFloat64, 0.24361603589088263)
+	c.Assert(hexStringToColor("#d5bc9f").Luminance(), hqt.IsSameFloat64, 0.5261577672685374)
+	c.Assert(hexStringToColor("#ffffff").Luminance(), hqt.IsSameFloat64, 1.0)
 }