feat(3): add unit tests for platform-specific images

go.mod

@@ -31,6 +31,7 @@ require (
 	github.com/spf13/cobra v1.8.1
 	github.com/spf13/pflag v1.0.5
 	github.com/spf13/viper v1.19.0
+	github.com/stretchr/testify v1.9.0
 	go.uber.org/zap v1.27.0
 	gomodules.xyz/jsonpatch/v2 v2.4.0
 	k8s.io/api v0.31.1
@@ -112,6 +113,7 @@ require (
 	github.com/opencontainers/image-spec v1.1.0 // indirect
 	github.com/pelletier/go-toml/v2 v2.2.2 // indirect
 	github.com/pkg/errors v0.9.1 // indirect
+	github.com/pmezard/go-difflib v1.0.1-0.20181226105442-5d4384ee4fb2 // indirect
 	github.com/prometheus/client_golang v1.19.1 // indirect
 	github.com/prometheus/client_model v0.6.1 // indirect
 	github.com/prometheus/common v0.55.0 // indirect

pkg/resolve/resolve_test.go

@@ -19,6 +19,8 @@ import (
 	"crypto/sha256"
 	"encoding/hex"
 	"fmt"
+	v1 "github.com/google/go-containerregistry/pkg/v1"
+	"github.com/stretchr/testify/assert"
 	"strings"
 	"testing"
 
@@ -58,6 +60,11 @@ func init() {
 		}
 		sumBytes := sha256.Sum256([]byte(image))
 		digest := strings.TrimRight(hex.EncodeToString(sumBytes[:]), "\r\n")
+		if platform != "" {
+			if _, err := v1.ParsePlatform(platform); err != nil {
+				return "", err
+			}
+		}
 		return fmt.Sprintf("sha256:%s", digest), nil
 	}
 }
@@ -163,6 +170,29 @@ func Test_ImageTags_Deployment(t *testing.T) {
 	assertContainer(t, node, "image3@sha256:b0542da3f90bad69318e16ec7fcb6b13b089971886999e08bec91cea34891f0f", "spec", "template", "spec", "initContainers", "[name=initcontainer1]")
 }
 
+func Test_ImageTags_ForPlatform(t *testing.T) {
+	node, err := createDeploymentNode([]string{"image0", "image1"}, []string{"image2", "image3"})
+	if err != nil {
+		t.Fatalf("could not create deployment node: %v", err)
+	}
+
+	if err := ImageTags(ctx, log, nil, node, []string{}, "linux/amd64"); err != nil {
+		t.Fatalf("problem resolving image tags: %v", err)
+	}
+	t.Log(node.MustString())
+}
+
+func Test_ImageTags_InvalidPlatform(t *testing.T) {
+	node, err := createDeploymentNode([]string{"image0", "image1"}, []string{"image2", "image3"})
+	if err != nil {
+		t.Fatalf("could not create deployment node: %v", err)
+	}
+
+	err = ImageTags(ctx, log, nil, node, []string{}, "some/other/linux/variant")
+	assert.ErrorContains(t, err, "too many slashes in platform spec")
+	t.Log(node.MustString())
+}
+
 func assertContainer(t *testing.T, n *yaml.RNode, imageWithDigest string, path ...string) {
 	container, err := n.Pipe(yaml.Lookup(path...), yaml.Get("image"))
 	if err != nil {