// Copyright 2015 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package big
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import (
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"bytes"
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"encoding/gob"
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"encoding/json"
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"encoding/xml"
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"testing"
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)
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func TestRatGobEncoding(t *testing.T) {
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var medium bytes.Buffer
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enc := gob.NewEncoder(&medium)
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dec := gob.NewDecoder(&medium)
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for _, test := range encodingTests {
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medium.Reset() // empty buffer for each test case (in case of failures)
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var tx Rat
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tx.SetString(test + ".14159265")
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if err := enc.Encode(&tx); err != nil {
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t.Errorf("encoding of %s failed: %s", &tx, err)
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continue
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}
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var rx Rat
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if err := dec.Decode(&rx); err != nil {
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t.Errorf("decoding of %s failed: %s", &tx, err)
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continue
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}
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if rx.Cmp(&tx) != 0 {
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t.Errorf("transmission of %s failed: got %s want %s", &tx, &rx, &tx)
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}
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}
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}
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// Sending a nil Rat pointer (inside a slice) on a round trip through gob should yield a zero.
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// TODO: top-level nils.
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func TestGobEncodingNilRatInSlice(t *testing.T) {
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buf := new(bytes.Buffer)
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enc := gob.NewEncoder(buf)
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dec := gob.NewDecoder(buf)
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var in = make([]*Rat, 1)
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err := enc.Encode(&in)
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if err != nil {
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t.Errorf("gob encode failed: %q", err)
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}
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var out []*Rat
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err = dec.Decode(&out)
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if err != nil {
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t.Fatalf("gob decode failed: %q", err)
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}
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if len(out) != 1 {
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t.Fatalf("wrong len; want 1 got %d", len(out))
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}
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var zero Rat
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if out[0].Cmp(&zero) != 0 {
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t.Fatalf("transmission of (*Int)(nil) failed: got %s want 0", out)
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}
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}
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var ratNums = []string{
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"-141592653589793238462643383279502884197169399375105820974944592307816406286",
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"-1415926535897932384626433832795028841971",
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"-141592653589793",
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"-1",
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"0",
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"1",
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"141592653589793",
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"1415926535897932384626433832795028841971",
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"141592653589793238462643383279502884197169399375105820974944592307816406286",
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}
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var ratDenoms = []string{
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"1",
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"718281828459045",
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"7182818284590452353602874713526624977572",
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"718281828459045235360287471352662497757247093699959574966967627724076630353",
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}
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func TestRatJSONEncoding(t *testing.T) {
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for _, num := range ratNums {
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for _, denom := range ratDenoms {
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var tx Rat
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tx.SetString(num + "/" + denom)
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b, err := json.Marshal(&tx)
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if err != nil {
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t.Errorf("marshaling of %s failed: %s", &tx, err)
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continue
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}
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var rx Rat
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if err := json.Unmarshal(b, &rx); err != nil {
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t.Errorf("unmarshaling of %s failed: %s", &tx, err)
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continue
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}
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if rx.Cmp(&tx) != 0 {
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t.Errorf("JSON encoding of %s failed: got %s want %s", &tx, &rx, &tx)
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}
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}
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}
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}
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func TestRatXMLEncoding(t *testing.T) {
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for _, num := range ratNums {
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for _, denom := range ratDenoms {
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var tx Rat
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tx.SetString(num + "/" + denom)
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b, err := xml.Marshal(&tx)
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if err != nil {
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t.Errorf("marshaling of %s failed: %s", &tx, err)
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continue
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}
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var rx Rat
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if err := xml.Unmarshal(b, &rx); err != nil {
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t.Errorf("unmarshaling of %s failed: %s", &tx, err)
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continue
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}
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if rx.Cmp(&tx) != 0 {
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t.Errorf("XML encoding of %s failed: got %s want %s", &tx, &rx, &tx)
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}
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}
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}
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}
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