// Copyright 2019 PingCAP, Inc. // // Licensed under the Apache License, Version 2.0 (the "License"); // you may not use this file except in compliance with the License. // You may obtain a copy of the License at // // http://www.apache.org/licenses/LICENSE-2.0 // // Unless required by applicable law or agreed to in writing, software // distributed under the License is distributed on an "AS IS" BASIS, // See the License for the specific language governing permissions and // limitations under the License. package math import ( "math/rand" "strconv" "testing" . "github.com/pingcap/check" ) func TestT(t *testing.T) { TestingT(t) } var _ = Suite(&testMath{}) type testMath struct{} func (s *testMath) TestStrLenOfUint64Fast_RandomTestCases(c *C) { for i := 0; i < 1000000; i++ { num := rand.Uint64() expected := len(strconv.FormatUint(num, 10)) actual := StrLenOfUint64Fast(num) c.Assert(actual, Equals, expected) } } func (s *testMath) TestStrLenOfUint64Fast_ManualTestCases(c *C) { nums := [22]uint64{0, 1, 12, 123, 1234, 12345, 123456, 1234567, 12345678, 123456789, 1234567890, 1234567891, 12345678912, 123456789123, 1234567891234, 12345678912345, 123456789123456, 1234567891234567, 12345678912345678, 123456789123456789, 123456789123457890, ^uint64(0), } for _, num := range nums { expected := len(strconv.FormatUint(num, 10)) actual := StrLenOfUint64Fast(num) c.Assert(actual, Equals, expected) } }