container: simple client resolver tests

Add some basic checks for the new `client.Resolve` method.
Specifically that pinning down the ids is working as expected.

internal/container/client_test.go

@@ -0,0 +1,65 @@
+package container_test
+
+import (
+	"context"
+	"testing"
+	"time"
+
+	"github.com/osbuild/osbuild-composer/internal/container"
+	"github.com/stretchr/testify/assert"
+)
+
+//
+
+func TestClientResolve(t *testing.T) {
+
+	registry := NewTestRegistry()
+	defer registry.Close()
+
+	repo := registry.AddRepo("library/osbuild")
+	repo.AddImage(
+		[]Blob{NewDataBlobFromBase64(rootLayer)},
+		[]string{"amd64", "ppc64le"},
+		"cool container",
+		time.Time{})
+
+	ref := registry.GetRef("library/osbuild")
+	client, err := container.NewClient(ref)
+
+	assert.NoError(t, err)
+	assert.NotNil(t, client)
+
+	client.SkipTLSVerify()
+
+	ctx := context.Background()
+
+	client.SetArchitectureChoice("amd64")
+	spec, err := client.Resolve(ctx, "")
+
+	assert.NoError(t, err)
+	assert.Equal(t, container.Spec{
+		Source:    ref,
+		Digest:    "sha256:f29b6cd42a94a574583439addcd6694e6224f0e4b32044c9e3aee4c4856c2a50",
+		ImageID:   "sha256:c2ecf25cf190e76b12b07436ad5140d4ba53d8a136d498705e57a006837a720f",
+		TLSVerify: client.GetTLSVerify(),
+		LocalName: ref,
+	}, spec)
+
+	client.SetArchitectureChoice("ppc64le")
+	spec, err = client.Resolve(ctx, "")
+
+	assert.NoError(t, err)
+	assert.Equal(t, container.Spec{
+		Source:    ref,
+		Digest:    "sha256:d49eebefb6c7ce5505594bef652bd4adc36f413861bd44209d9b9486310b1264",
+		ImageID:   "sha256:d2ab8fea7f08a22f03b30c13c6ea443121f25e87202a7496e93736efa6fe345a",
+		TLSVerify: client.GetTLSVerify(),
+		LocalName: ref,
+	}, spec)
+
+	// don't have that architecture
+	client.SetArchitectureChoice("s390x")
+	_, err = client.Resolve(ctx, "")
+
+	assert.Error(t, err)
+}