code review 967041: big: Add some tests

src/pkg/big/int_test.go

 // Copyright 2009 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/hex"
         "testing"
@@ skipping 133 matching lines @@
         fromStringTest{"0", 10, 0, true},
         fromStringTest{"0", 16, 0, true},
         fromStringTest{"10", 0, 10, true},
         fromStringTest{"10", 10, 10, true},
         fromStringTest{"10", 16, 16, true},
         fromStringTest{"-10", 16, -16, true},
         fromStringTest{in: "0x", ok: false},
         fromStringTest{"0x10", 0, 16, true},
         fromStringTest{in: "0x10", base: 16, ok: false},
         fromStringTest{"-0x10", 0, -16, true},
+        fromStringTest{"00", 0, 0, true},
+        fromStringTest{"0", 8, 0, true},
+        fromStringTest{"07", 0, 7, true},
+        fromStringTest{"7", 8, 7, true},
+        fromStringTest{in: "08", ok: false},
+        fromStringTest{in: "8", base: 8, ok: false},
+        fromStringTest{"023", 0, 19, true},
+        fromStringTest{"23", 8, 19, true},
 }
 
 
 func TestSetString(t *testing.T) {
         n2 := new(Int)
         for i, test := range fromStringTests {
                 n1, ok1 := new(Int).SetString(test.in, test.base)
                 n2, ok2 := n2.SetString(test.in, test.base)
                 expected := new(Int).New(test.out)
                 if ok1 != test.ok || ok2 != test.ok {
@@ skipping 507 matching lines @@
 func TestInt64(t *testing.T) {
         for i, testVal := range int64Tests {
                 in := NewInt(testVal)
                 out := in.Int64()
 
                 if out != testVal {
                         t.Errorf("#%d got %d want %d", i, out, testVal)
                 }
         }
 }