tests: add provenance test for duplicate platform

Signed-off-by: Justin Chadwell <[email protected]>

Author: jedevc

frontend/dockerfile/dockerfile_provenance_test.go

@@ -1048,6 +1048,37 @@ ENV FOO=bar
 	require.NoError(t, err)
 }
 
+// https://github.com/moby/buildkit/issues/3562
+func testDuplicatePlatformProvenance(t *testing.T, sb integration.Sandbox) {
+	integration.CheckFeatureCompat(t, sb, integration.FeatureProvenance)
+	ctx := sb.Context()
+
+	c, err := client.New(ctx, sb.Address())
+	require.NoError(t, err)
+	defer c.Close()
+
+	f := getFrontend(t, sb)
+
+	dockerfile := []byte(`FROM alpine`)
+	dir, err := integration.Tmpdir(
+		t,
+		fstest.CreateFile("Dockerfile", dockerfile, 0600),
+	)
+	require.NoError(t, err)
+
+	_, err = f.Solve(sb.Context(), c, client.SolveOpt{
+		FrontendAttrs: map[string]string{
+			"attest:provenance": "mode=max",
+			"platform":          "linux/amd64,linux/amd64",
+		},
+		LocalDirs: map[string]string{
+			dockerui.DefaultLocalNameDockerfile: dir,
+			dockerui.DefaultLocalNameContext:    dir,
+		},
+	}, nil)
+	require.NoError(t, err)
+}
+
 // https://github.com/moby/buildkit/issues/3928
 func testDockerIgnoreMissingProvenance(t *testing.T, sb integration.Sandbox) {
 	integration.CheckFeatureCompat(t, sb, integration.FeatureProvenance)

frontend/dockerfile/dockerfile_test.go

@@ -163,6 +163,7 @@ var allTests = integration.TestFuncs(
 	testSecretSSHProvenance,
 	testOCILayoutProvenance,
 	testNilProvenance,
+	testDuplicatePlatformProvenance,
 	testDockerIgnoreMissingProvenance,
 	testSBOMScannerArgs,
 	testMultiPlatformWarnings,