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-rw-r--r--src/math/big/intmarsh_test.go134
1 files changed, 134 insertions, 0 deletions
diff --git a/src/math/big/intmarsh_test.go b/src/math/big/intmarsh_test.go
new file mode 100644
index 0000000..8e7d29f
--- /dev/null
+++ b/src/math/big/intmarsh_test.go
@@ -0,0 +1,134 @@
+// Copyright 2015 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package big
+
+import (
+ "bytes"
+ "encoding/gob"
+ "encoding/json"
+ "encoding/xml"
+ "testing"
+)
+
+var encodingTests = []string{
+ "0",
+ "1",
+ "2",
+ "10",
+ "1000",
+ "1234567890",
+ "298472983472983471903246121093472394872319615612417471234712061",
+}
+
+func TestIntGobEncoding(t *testing.T) {
+ var medium bytes.Buffer
+ enc := gob.NewEncoder(&medium)
+ dec := gob.NewDecoder(&medium)
+ for _, test := range encodingTests {
+ for _, sign := range []string{"", "+", "-"} {
+ x := sign + test
+ medium.Reset() // empty buffer for each test case (in case of failures)
+ var tx Int
+ tx.SetString(x, 10)
+ if err := enc.Encode(&tx); err != nil {
+ t.Errorf("encoding of %s failed: %s", &tx, err)
+ continue
+ }
+ var rx Int
+ if err := dec.Decode(&rx); err != nil {
+ t.Errorf("decoding of %s failed: %s", &tx, err)
+ continue
+ }
+ if rx.Cmp(&tx) != 0 {
+ t.Errorf("transmission of %s failed: got %s want %s", &tx, &rx, &tx)
+ }
+ }
+ }
+}
+
+// Sending a nil Int pointer (inside a slice) on a round trip through gob should yield a zero.
+// TODO: top-level nils.
+func TestGobEncodingNilIntInSlice(t *testing.T) {
+ buf := new(bytes.Buffer)
+ enc := gob.NewEncoder(buf)
+ dec := gob.NewDecoder(buf)
+
+ var in = make([]*Int, 1)
+ err := enc.Encode(&in)
+ if err != nil {
+ t.Errorf("gob encode failed: %q", err)
+ }
+ var out []*Int
+ err = dec.Decode(&out)
+ if err != nil {
+ t.Fatalf("gob decode failed: %q", err)
+ }
+ if len(out) != 1 {
+ t.Fatalf("wrong len; want 1 got %d", len(out))
+ }
+ var zero Int
+ if out[0].Cmp(&zero) != 0 {
+ t.Fatalf("transmission of (*Int)(nil) failed: got %s want 0", out)
+ }
+}
+
+func TestIntJSONEncoding(t *testing.T) {
+ for _, test := range encodingTests {
+ for _, sign := range []string{"", "+", "-"} {
+ x := sign + test
+ var tx Int
+ tx.SetString(x, 10)
+ b, err := json.Marshal(&tx)
+ if err != nil {
+ t.Errorf("marshaling of %s failed: %s", &tx, err)
+ continue
+ }
+ var rx Int
+ if err := json.Unmarshal(b, &rx); err != nil {
+ t.Errorf("unmarshaling of %s failed: %s", &tx, err)
+ continue
+ }
+ if rx.Cmp(&tx) != 0 {
+ t.Errorf("JSON encoding of %s failed: got %s want %s", &tx, &rx, &tx)
+ }
+ }
+ }
+}
+
+func TestIntJSONEncodingNil(t *testing.T) {
+ var x *Int
+ b, err := x.MarshalJSON()
+ if err != nil {
+ t.Fatalf("marshaling of nil failed: %s", err)
+ }
+ got := string(b)
+ want := "null"
+ if got != want {
+ t.Fatalf("marshaling of nil failed: got %s want %s", got, want)
+ }
+}
+
+func TestIntXMLEncoding(t *testing.T) {
+ for _, test := range encodingTests {
+ for _, sign := range []string{"", "+", "-"} {
+ x := sign + test
+ var tx Int
+ tx.SetString(x, 0)
+ b, err := xml.Marshal(&tx)
+ if err != nil {
+ t.Errorf("marshaling of %s failed: %s", &tx, err)
+ continue
+ }
+ var rx Int
+ if err := xml.Unmarshal(b, &rx); err != nil {
+ t.Errorf("unmarshaling of %s failed: %s", &tx, err)
+ continue
+ }
+ if rx.Cmp(&tx) != 0 {
+ t.Errorf("XML encoding of %s failed: got %s want %s", &tx, &rx, &tx)
+ }
+ }
+ }
+}