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package uenv
import (
"bytes"
"hash/crc32"
"io/ioutil"
"os"
"path/filepath"
"strings"
"testing"
. "gopkg.in/check.v1"
)
// Hook up check.v1 into the "go test" runner
func Test(t *testing.T) { TestingT(t) }
type uenvTestSuite struct {
envFile string
}
var _ = Suite(&uenvTestSuite{})
func (u *uenvTestSuite) SetUpTest(c *C) {
u.envFile = filepath.Join(c.MkDir(), "uboot.env")
}
func (u *uenvTestSuite) TestSetNoDuplicate(c *C) {
env, err := Create(u.envFile, 4096)
c.Assert(err, IsNil)
env.Set("foo", "bar")
env.Set("foo", "bar")
c.Assert(env.String(), Equals, "foo=bar\n")
}
func (u *uenvTestSuite) TestOpenEnv(c *C) {
env, err := Create(u.envFile, 4096)
c.Assert(err, IsNil)
env.Set("foo", "bar")
c.Assert(env.String(), Equals, "foo=bar\n")
err = env.Save()
c.Assert(err, IsNil)
env2, err := Open(u.envFile)
c.Assert(err, IsNil)
c.Assert(env2.String(), Equals, "foo=bar\n")
}
func (u *uenvTestSuite) TestGetSimple(c *C) {
env, err := Create(u.envFile, 4096)
c.Assert(err, IsNil)
env.Set("foo", "bar")
c.Assert(env.Get("foo"), Equals, "bar")
}
func (u *uenvTestSuite) TestGetNoSuchEntry(c *C) {
env, err := Create(u.envFile, 4096)
c.Assert(err, IsNil)
c.Assert(env.Get("no-such-entry"), Equals, "")
}
func (u *uenvTestSuite) TestImport(c *C) {
env, err := Create(u.envFile, 4096)
c.Assert(err, IsNil)
r := strings.NewReader("foo=bar\n#comment\n\nbaz=baz")
err = env.Import(r)
c.Assert(err, IsNil)
// order is alphabetic
c.Assert(env.String(), Equals, "baz=baz\nfoo=bar\n")
}
func (u *uenvTestSuite) TestImportHasError(c *C) {
env, err := Create(u.envFile, 4096)
c.Assert(err, IsNil)
r := strings.NewReader("foxy")
err = env.Import(r)
c.Assert(err, ErrorMatches, "Invalid line: \"foxy\"")
}
func (u *uenvTestSuite) TestSetEmptyUnsets(c *C) {
env, err := Create(u.envFile, 4096)
c.Assert(err, IsNil)
env.Set("foo", "bar")
c.Assert(env.String(), Equals, "foo=bar\n")
env.Set("foo", "")
c.Assert(env.String(), Equals, "")
}
func (u *uenvTestSuite) makeUbootEnvFromData(c *C, mockData []byte) {
w := bytes.NewBuffer(nil)
crc := crc32.ChecksumIEEE(mockData)
w.Write(writeUint32(crc))
w.Write([]byte{0})
w.Write(mockData)
f, err := os.Create(u.envFile)
c.Assert(err, IsNil)
defer f.Close()
_, err = f.Write(w.Bytes())
c.Assert(err, IsNil)
}
// ensure that the data after \0\0 is discarded (except for crc)
func (u *uenvTestSuite) TestReadStopsAfterDoubleNull(c *C) {
mockData := []byte{
// foo=bar
0x66, 0x6f, 0x6f, 0x3d, 0x62, 0x61, 0x72,
// eof
0x00, 0x00,
// junk after eof as written by fw_setenv sometimes
// =b
0x3d, 62,
// empty
0xff, 0xff,
}
u.makeUbootEnvFromData(c, mockData)
env, err := Open(u.envFile)
c.Assert(err, IsNil)
c.Assert(env.String(), Equals, "foo=bar\n")
}
// ensure that the malformed data is not causing us to panic.
func (u *uenvTestSuite) TestErrorOnMalformedData(c *C) {
mockData := []byte{
// foo
0x66, 0x6f, 0x6f,
// eof
0x00, 0x00,
}
u.makeUbootEnvFromData(c, mockData)
env, err := Open(u.envFile)
c.Assert(err, ErrorMatches, `cannot parse line "foo" as key=value pair`)
c.Assert(env, IsNil)
}
// ensure that the malformed data is not causing us to panic.
func (u *uenvTestSuite) TestOpenBestEffort(c *C) {
mockData := []byte{
// key1=value1
0x6b, 0x65, 0x79, 0x31, 0x3d, 0x76, 0x61, 0x6c, 0x75, 0x65, 0x31, 0x00,
// foo
0x66, 0x6f, 0x6f, 0x00,
// key2=value2
0x6b, 0x65, 0x79, 0x32, 0x3d, 0x76, 0x61, 0x6c, 0x75, 0x65, 0x32, 0x00,
// eof
0x00, 0x00,
}
u.makeUbootEnvFromData(c, mockData)
env, err := OpenWithFlags(u.envFile, OpenBestEffort)
c.Assert(err, IsNil)
c.Assert(env.String(), Equals, "key1=value1\nkey2=value2\n")
}
func (u *uenvTestSuite) TestReadEmptyFile(c *C) {
mockData := []byte{
// eof
0x00, 0x00,
// empty
0xff, 0xff,
}
u.makeUbootEnvFromData(c, mockData)
env, err := Open(u.envFile)
c.Assert(err, IsNil)
c.Assert(env.String(), Equals, "")
}
func (u *uenvTestSuite) TestWritesEmptyFileWithDoubleNewline(c *C) {
env, err := Create(u.envFile, 12)
c.Assert(err, IsNil)
err = env.Save()
c.Assert(err, IsNil)
r, err := os.Open(u.envFile)
c.Assert(err, IsNil)
defer r.Close()
content, err := ioutil.ReadAll(r)
c.Assert(err, IsNil)
c.Assert(content, DeepEquals, []byte{
// crc
0x11, 0x38, 0xb3, 0x89,
// redundant
0x0,
// eof
0x0, 0x0,
// footer
0xff, 0xff, 0xff, 0xff, 0xff,
})
env, err = Open(u.envFile)
c.Assert(err, IsNil)
c.Assert(env.String(), Equals, "")
}
func (u *uenvTestSuite) TestWritesContentCorrectly(c *C) {
totalSize := 16
env, err := Create(u.envFile, totalSize)
c.Assert(err, IsNil)
env.Set("a", "b")
env.Set("c", "d")
err = env.Save()
c.Assert(err, IsNil)
r, err := os.Open(u.envFile)
c.Assert(err, IsNil)
defer r.Close()
content, err := ioutil.ReadAll(r)
c.Assert(err, IsNil)
c.Assert(content, DeepEquals, []byte{
// crc
0xc7, 0xd9, 0x6b, 0xc5,
// redundant
0x0,
// a=b
0x61, 0x3d, 0x62,
// eol
0x0,
// c=d
0x63, 0x3d, 0x64,
// eof
0x0, 0x0,
// footer
0xff, 0xff,
})
env, err = Open(u.envFile)
c.Assert(err, IsNil)
c.Assert(env.String(), Equals, "a=b\nc=d\n")
c.Assert(env.size, Equals, totalSize)
}
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