1 // Copyright 2015 The Go Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style 3 // license that can be found in the LICENSE file. 4 5 package big 6 7 import ( 8 "bytes" 9 "encoding/gob" 10 "encoding/json" 11 "encoding/xml" 12 "testing" 13 ) 14 15 func TestRatGobEncoding(t *testing.T) { 16 var medium bytes.Buffer 17 enc := gob.NewEncoder(&medium) 18 dec := gob.NewDecoder(&medium) 19 for _, test := range encodingTests { 20 medium.Reset() // empty buffer for each test case (in case of failures) 21 var tx Rat 22 tx.SetString(test + ".14159265") 23 if err := enc.Encode(&tx); err != nil { 24 t.Errorf("encoding of %s failed: %s", &tx, err) 25 continue 26 } 27 var rx Rat 28 if err := dec.Decode(&rx); err != nil { 29 t.Errorf("decoding of %s failed: %s", &tx, err) 30 continue 31 } 32 if rx.Cmp(&tx) != 0 { 33 t.Errorf("transmission of %s failed: got %s want %s", &tx, &rx, &tx) 34 } 35 } 36 } 37 38 // Sending a nil Rat pointer (inside a slice) on a round trip through gob should yield a zero. 39 // TODO: top-level nils. 40 func TestGobEncodingNilRatInSlice(t *testing.T) { 41 buf := new(bytes.Buffer) 42 enc := gob.NewEncoder(buf) 43 dec := gob.NewDecoder(buf) 44 45 var in = make([]*Rat, 1) 46 err := enc.Encode(&in) 47 if err != nil { 48 t.Errorf("gob encode failed: %q", err) 49 } 50 var out []*Rat 51 err = dec.Decode(&out) 52 if err != nil { 53 t.Fatalf("gob decode failed: %q", err) 54 } 55 if len(out) != 1 { 56 t.Fatalf("wrong len; want 1 got %d", len(out)) 57 } 58 var zero Rat 59 if out[0].Cmp(&zero) != 0 { 60 t.Fatalf("transmission of (*Int)(nil) failed: got %s want 0", out) 61 } 62 } 63 64 var ratNums = []string{ 65 "-141592653589793238462643383279502884197169399375105820974944592307816406286", 66 "-1415926535897932384626433832795028841971", 67 "-141592653589793", 68 "-1", 69 "0", 70 "1", 71 "141592653589793", 72 "1415926535897932384626433832795028841971", 73 "141592653589793238462643383279502884197169399375105820974944592307816406286", 74 } 75 76 var ratDenoms = []string{ 77 "1", 78 "718281828459045", 79 "7182818284590452353602874713526624977572", 80 "718281828459045235360287471352662497757247093699959574966967627724076630353", 81 } 82 83 func TestRatJSONEncoding(t *testing.T) { 84 for _, num := range ratNums { 85 for _, denom := range ratDenoms { 86 var tx Rat 87 tx.SetString(num + "/" + denom) 88 b, err := json.Marshal(&tx) 89 if err != nil { 90 t.Errorf("marshaling of %s failed: %s", &tx, err) 91 continue 92 } 93 var rx Rat 94 if err := json.Unmarshal(b, &rx); err != nil { 95 t.Errorf("unmarshaling of %s failed: %s", &tx, err) 96 continue 97 } 98 if rx.Cmp(&tx) != 0 { 99 t.Errorf("JSON encoding of %s failed: got %s want %s", &tx, &rx, &tx) 100 } 101 } 102 } 103 } 104 105 func TestRatXMLEncoding(t *testing.T) { 106 for _, num := range ratNums { 107 for _, denom := range ratDenoms { 108 var tx Rat 109 tx.SetString(num + "/" + denom) 110 b, err := xml.Marshal(&tx) 111 if err != nil { 112 t.Errorf("marshaling of %s failed: %s", &tx, err) 113 continue 114 } 115 var rx Rat 116 if err := xml.Unmarshal(b, &rx); err != nil { 117 t.Errorf("unmarshaling of %s failed: %s", &tx, err) 118 continue 119 } 120 if rx.Cmp(&tx) != 0 { 121 t.Errorf("XML encoding of %s failed: got %s want %s", &tx, &rx, &tx) 122 } 123 } 124 } 125 } 126
