Disable polynomial check for chunker for tests

cmd/restic/integration_helpers_test.go

@@ -11,6 +11,7 @@ import (
 
 	"github.com/restic/restic/internal/options"
 	"github.com/restic/restic/internal/repository"
+	"github.com/restic/restic/internal/restic"
 	rtest "github.com/restic/restic/internal/test"
 )
 
@@ -189,6 +190,7 @@ func withTestEnvironment(t testing.TB) (env *testEnvironment, cleanup func()) {
 	}
 
 	repository.TestUseLowSecurityKDFParameters(t)
+	restic.TestDisableCheckPolynomial(t)
 
 	tempdir, err := ioutil.TempDir(rtest.TestTempDir, "restic-test-")
 	rtest.OK(t, err)

cmd/restic/integration_test.go

@@ -44,6 +44,7 @@ func parseIDsFromReader(t testing.TB, rd io.Reader) restic.IDs {
 
 func testRunInit(t testing.TB, opts GlobalOptions) {
 	repository.TestUseLowSecurityKDFParameters(t)
+	restic.TestDisableCheckPolynomial(t)
 	restic.TestSetLockTimeout(t, 0)
 
 	rtest.OK(t, runInit(opts, nil))

internal/restic/config.go

@@ -57,6 +57,15 @@ func TestCreateConfig(t testing.TB, pol chunker.Pol) (cfg Config) {
 	return cfg
 }
 
+var checkPolynomial = true
+
+// TestDisableCheckPolynomial disables the check that the polynomial used for
+// the chunker.
+func TestDisableCheckPolynomial(t testing.TB) {
+	t.Logf("disabling check of the chunker polynomial")
+	checkPolynomial = false
+}
+
 // LoadConfig returns loads, checks and returns the config for a repository.
 func LoadConfig(ctx context.Context, r JSONUnpackedLoader) (Config, error) {
 	var (
@@ -72,8 +81,10 @@ func LoadConfig(ctx context.Context, r JSONUnpackedLoader) (Config, error) {
 		return Config{}, errors.New("unsupported repository version")
 	}
 
-	if !cfg.ChunkerPolynomial.Irreducible() {
-		return Config{}, errors.New("invalid chunker polynomial")
+	if checkPolynomial {
+		if !cfg.ChunkerPolynomial.Irreducible() {
+			return Config{}, errors.New("invalid chunker polynomial")
+		}
 	}
 
 	return cfg, nil