/usr/share/gocode/src/github.com/jacobsa/crypto/common/msb_test.go is in golang-github-jacobsa-crypto-dev 0.0~git20161111.0.293ce0c-3.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 | // Copyright 2012 Aaron Jacobs. All Rights Reserved.
// Author: aaronjjacobs@gmail.com (Aaron Jacobs)
//
// 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,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package common_test
import (
"github.com/jacobsa/crypto/common"
. "github.com/jacobsa/oglematchers"
. "github.com/jacobsa/ogletest"
"strconv"
"testing"
)
func TestMsb(t *testing.T) { RunTests(t) }
////////////////////////////////////////////////////////////////////////
// Helpers
////////////////////////////////////////////////////////////////////////
func fromBinary(s string) byte {
AssertEq(8, len(s), "%s", s)
u, err := strconv.ParseUint(s, 2, 8)
AssertEq(nil, err, "%s", s)
return byte(u)
}
type MsbTest struct{}
func init() { RegisterTestSuite(&MsbTest{}) }
////////////////////////////////////////////////////////////////////////
// Tests
////////////////////////////////////////////////////////////////////////
func (t *MsbTest) NilBuffer() {
f := func() { common.Msb(nil) }
ExpectThat(f, Panics(HasSubstr("empty")))
}
func (t *MsbTest) EmptyBuffer() {
f := func() { common.Msb([]byte{}) }
ExpectThat(f, Panics(HasSubstr("empty")))
}
func (t *MsbTest) MostSignficantIsOne() {
bufs := [][]byte{
[]byte{fromBinary("10000000")},
[]byte{fromBinary("11000000")},
[]byte{fromBinary("11100000")},
[]byte{fromBinary("10000000"), fromBinary("00000000")},
}
for i, buf := range bufs {
ExpectEq(1, common.Msb(buf), "Test case %d: %v", i, buf)
}
}
func (t *MsbTest) MostSignficantIsZero() {
bufs := [][]byte{
[]byte{fromBinary("00000000")},
[]byte{fromBinary("01000000")},
[]byte{fromBinary("01100000")},
[]byte{fromBinary("00000000"), fromBinary("10000000")},
}
for i, buf := range bufs {
ExpectEq(0, common.Msb(buf), "Test case %d: %v", i, buf)
}
}
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