func Test_PythonPlugin_builtins(t *testing.T) {
cleanup := testutils.Chtemp()
defer cleanup()
// this isn't really the builtin Fubsy println() function: we can't
// use it because it's in the runtime package, and we don't want
// to because it has side-effects... but we're stuck with a
// hardcoded set of builtin function names for now, so we have to
// reuse one of them
calls := []string{}
fn_println := func(args types.ArgSource) (types.FuObject, []error) {
s := args.Args()[0].ValueString()
calls = append(calls, s)
return nil, nil
}
builtins := StubBuiltinList{types.NewFixedFunction("println", 1, fn_println)}
pp, err := LoadMetaPlugin("python2", builtins)
testutils.NoError(t, err)
values, err := pp.Run(`
fubsy.println("ding")
fubsy.println("dong")
`)
_ = values
expect := []string{"ding", "dong"}
testutils.NoError(t, err)
assert.Equal(t, expect, calls)
}
func Test_KyotoDB_key_prefix(t *testing.T) {
// make sure we write the key exactly as expected, byte-for-byte
cleanup := testutils.Chtemp()
defer cleanup()
db, err := OpenKyotoDB("test1.kch", true)
if err != nil {
t.Fatal(err)
}
assert.NotNil(t, db.kcdb)
rec1 := NewBuildRecord()
rec1.SetTargetSignature([]byte{})
db.WriteNode("f", rec1)
db.WriteNode("foobar", rec1)
db.WriteNode("foo", rec1)
// hmmm: does Kyoto Cabinet guarantee key order? it seems to
// preserve insertion order from what I can tell, but I'm not
// sure if that's reliable
expect := []string{
"\x00\x00\x00\x00version",
"\x00\x00\x00\x01f",
"\x00\x00\x00\x01foobar",
"\x00\x00\x00\x01foo",
}
keychan := db.kcdb.Keys()
for i, expectstr := range expect {
expectkey := ([]byte)(expectstr)
actualkey := <-keychan
if !bytes.Equal(expectkey, actualkey) {
t.Errorf("key %d: expected\n%v\nbut got\n%v", i, expectkey, actualkey)
}
}
}
func Test_FinderNode_Expand_single_include(t *testing.T) {
cleanup := testutils.Chtemp()
defer cleanup()
testutils.TouchFiles(
"lib1/foo.c", "lib1/sub/blah.c", "include/bop.h", "include/bip.h")
finder := NewFinderNode("*/*.c")
assertExpand(t, nil, []string{"lib1/foo.c"}, finder)
finder = NewFinderNode("**/*.c")
assertExpand(t, nil, []string{"lib1/foo.c", "lib1/sub/blah.c"}, finder)
finder = NewFinderNode("l?b?/**/*.c")
assertExpand(t, nil, []string{"lib1/foo.c", "lib1/sub/blah.c"}, finder)
finder = NewFinderNode("in?lu?e/*.h")
assertExpand(t, nil, []string{"include/bip.h", "include/bop.h"}, finder)
finder = NewFinderNode("inc*/?i*.h")
assertExpand(t, nil, []string{"include/bip.h"}, finder)
// adding new files changes nothing, because FinderNode caches the
// result of Expand()
testutils.TouchFiles("include/mip.h", "include/fibbb.h")
assertExpand(t, nil, []string{"include/bip.h"}, finder)
// but a new FileFinder instance will see them
finder = NewFinderNode("inc*/?i*.h")
assertExpand(t,
nil,
[]string{"include/bip.h", "include/fibbb.h", "include/mip.h"},
finder)
}
func Test_FinderNode_Expand_vars(t *testing.T) {
// imagine code like this:
// srcdir = "src/stuff"
// files = <$srcdir/*.c>
// "myapp": "$srcdir/main.c" {
// "cc -c $files"
// }
// ...i.e. a FinderNode that is not in the DAG, so variable
// references do not get expanded by DAG.ExpandNodes(). This is
// clearly a bogus build script, but that's beside the point. We
// need to ensure that the wildcard expanded is not "$srcdir/*.c"
// but "src/stuff/*.c".
cleanup := testutils.Chtemp()
defer cleanup()
testutils.TouchFiles(
"lib1/foo.c", "lib1/sub/blah.c", "include/bop.h", "include/bip.h")
ns := types.NewValueMap()
ns.Assign("libsrc", types.MakeFuString("lib1"))
finder := NewFinderNode("$libsrc/**/*.c")
expect := []string{
"lib1/foo.c",
"lib1/sub/blah.c",
}
assertExpand(t, ns, expect, finder)
}
func Test_FinderNode_FindFiles_prune(t *testing.T) {
cleanup := testutils.Chtemp()
defer cleanup()
testutils.TouchFiles(
"src/a/1.c", "src/a/2.c", "src/a/2.h", "src/a/3.h",
"src/b/1.c", "src/b/2.c", "src/b/2.h", "src/b/3.h",
"src/b/b/1.c", "src/b/b/2.c", "src/b/b/2.h",
"lib/x.c", "lib/sub/x.c")
var finder *FinderNode
var expect []string
test := func(expect []string) {
actual, err := finder.FindFiles()
assert.Nil(t, err)
if !reflect.DeepEqual(expect, actual) {
t.Errorf("includes = %v, prune = %v:\nexpected:\n%#v\nbut got:\n%#v",
finder.includes, finder.prune, expect, actual)
}
// wipe the cache so this finder can be used again
finder.matches = nil
}
finder = NewFinderNode("src/**/*.c", "src/b/**/*.h")
finder.Prune("src/a")
expect = []string{
"src/b/1.c", "src/b/2.c", "src/b/b/1.c", "src/b/b/2.c",
"src/b/2.h", "src/b/3.h", "src/b/b/2.h"}
test(expect)
// successive calls to Prune() build up the prune set
finder = NewFinderNode("*/*.c")
finder.Prune("src")
expect = []string{"lib/x.c"}
test(expect)
finder.Prune("lib")
expect = []string{}
test(expect)
finder = NewFinderNode("*/*/?.c")
expect = []string{
"lib/sub/x.c", "src/a/1.c", "src/a/2.c", "src/b/1.c", "src/b/2.c"}
test(expect)
finder.Prune("src/b")
expect = []string{
"lib/sub/x.c", "src/a/1.c", "src/a/2.c"}
test(expect)
finder = NewFinderNode("**/b/?.h")
expect = []string{"src/b/2.h", "src/b/3.h", "src/b/b/2.h"}
test(expect)
finder.Prune("src/b/b")
expect = []string{"src/b/2.h", "src/b/3.h"}
test(expect)
finder.Prune("src/b")
expect = []string{}
test(expect)
}
func Test_mkdir(t *testing.T) {
cleanup := testutils.Chtemp()
defer cleanup()
// mkdir() happily accepts an empty argument list, to allow for
// cases where a user-defined list becomes the arg list, and it
// just happens to be empty
pargs := []types.FuObject{}
args := RuntimeArgs{
BasicArgs: types.MakeBasicArgs(nil, pargs, nil),
}
result, errs := fn_mkdir(args)
assert.Nil(t, result)
assert.Equal(t, 0, len(errs))
assert.Equal(t, []string{}, dirContents("."))
// easiest case: create a single dir
pargs = types.MakeStringList("foo").List()
args.SetArgs(pargs)
result, errs = fn_mkdir(args)
assert.Nil(t, result)
assert.Equal(t, 0, len(errs))
assert.Equal(t, []string{"foo"}, dirContents("."))
assert.True(t, isDir("foo"))
// create multiple dirs, including "foo" which already exists
pargs = types.MakeStringList("meep/meep/meep", "foo", "meep/beep").List()
args.SetArgs(pargs)
result, errs = fn_mkdir(args)
assert.Nil(t, result)
assert.Equal(t, 0, len(errs))
assert.Equal(t, []string{"foo", "meep"}, dirContents("."))
assert.True(t, isDir("foo"))
assert.True(t, isDir("meep/meep"))
assert.True(t, isDir("meep/meep/meep"))
assert.True(t, isDir("meep/beep"))
// now with an error in the middle of the list (*but* we still
// create the other requested dirs!)
testutils.TouchFiles("meep/zap")
pargs = types.MakeStringList("meep/bap", "meep/zap/zip", "foo/bar").List()
args.SetArgs(pargs)
result, errs = fn_mkdir(args)
assert.Nil(t, result)
assert.Equal(t, 1, len(errs))
assert.Equal(t, "mkdir meep/zap: not a directory", errs[0].Error())
assert.True(t, isDir("meep/bap"))
assert.True(t, isDir("foo/bar"))
// finally, with multiple errors
pargs = append(pargs, types.MakeFuString("meep/zap/blop"))
args.SetArgs(pargs)
result, errs = fn_mkdir(args)
assert.Nil(t, result)
assert.Equal(t, 2, len(errs))
assert.Equal(t, "mkdir meep/zap: not a directory", errs[0].Error())
assert.Equal(t, "mkdir meep/zap: not a directory", errs[1].Error())
}
func Test_println(t *testing.T) {
cleanup1 := testutils.Chtemp()
defer cleanup1()
rfile, err := os.Create("stdout")
if err != nil {
panic(err)
}
// save a copy of stdout in another fd
stdout_fd := int(os.Stdout.Fd())
save_stdout, err := syscall.Dup(stdout_fd)
if err != nil {
panic(err)
}
// redirect stdout to rfile
err = syscall.Dup2(int(rfile.Fd()), stdout_fd)
if err != nil {
panic(err)
}
cleanup2 := func() {
rfile.Close()
err = syscall.Dup2(save_stdout, stdout_fd)
if err != nil {
panic(err)
}
syscall.Close(save_stdout)
}
defer cleanup2()
args := RuntimeArgs{
BasicArgs: types.MakeBasicArgs(nil, []types.FuObject{}, nil),
}
result, errs := fn_println(args)
assert.Nil(t, result)
assert.Equal(t, 0, len(errs))
data, err := ioutil.ReadFile("stdout")
assert.Nil(t, err)
assert.Equal(t, "\n", string(data))
rfile.Truncate(0)
rfile.Seek(0, 0)
args.SetArgs(types.MakeStringList("hello", "world").List())
fn_println(args)
data, err = ioutil.ReadFile("stdout")
assert.Nil(t, err)
assert.Equal(t, "hello world\n", string(data))
rfile.Truncate(0)
rfile.Seek(0, 0)
}
func Test_FinderNode_Add_Expand(t *testing.T) {
cleanup := testutils.Chtemp()
defer cleanup()
testutils.TouchFiles(
"src/foo.c", "src/foo.h", "main.c", "include/bop.h",
"doc.txt", "doc/stuff.txt", "doc/blahblah.rst")
finder1 := NewFinderNode("**/*.c")
finder2 := NewFinderNode("doc/*.txt")
// sum = <**/*.c> + <doc/*.txt>
expect := []string{
"main.c", "src/foo.c", "doc/stuff.txt"}
sum, err := finder1.Add(finder2)
assert.Nil(t, err)
assertExpand(t, nil, expect, sum)
// sum = sum + <"*c*/?o?.h">
finder3 := NewFinderNode("*c*/?o?.h")
expect = append(expect, "include/bop.h", "src/foo.h")
sum, err = sum.Add(finder3)
assert.Nil(t, err)
assertExpand(t, nil, expect, sum)
// sum = <*c*/?o?.h> + <**/*.c>
expect = []string{
"include/bop.h", "src/foo.h", "main.c", "src/foo.c"}
sum, err = finder3.Add(finder1)
assert.Nil(t, err)
assertExpand(t, nil, expect, sum)
// sum = <doc/*.txt> + sum
// (effectively: sum = <doc/*.txt> + (<*c*/?o?.h> + <**/*.c>))
expect = append([]string{"doc/stuff.txt"}, expect...)
sum, err = finder2.Add(sum)
assert.Nil(t, err)
assertExpand(t, nil, expect, sum)
// sum = <**/*.c> + "urgh"
expect = []string{
"main.c", "src/foo.c", "urgh"}
sum, err = finder1.Add(types.MakeFuString("urgh"))
assert.Nil(t, err)
assertExpand(t, nil, expect, sum)
// sum = <**/*.c> + ["a", "b", "c"]
expect = []string{
"main.c", "src/foo.c", "a", "b", "c"}
list := types.MakeStringList("a", "b", "c")
sum, err = finder1.Add(list)
assert.Nil(t, err)
assertExpand(t, nil, expect, sum)
}
func Test_KyotoDB_lookup_fail(t *testing.T) {
// looking up a non-existent key is not an error
cleanup := testutils.Chtemp()
defer cleanup()
db, err := OpenKyotoDB("test.kch", true)
if err != nil {
t.Fatal(err)
}
record, err := db.LookupNode("nosuchnode")
assert.Nil(t, record)
assert.Nil(t, err)
}
func Test_FileNode_Signature(t *testing.T) {
cleanup := testutils.Chtemp()
defer cleanup()
testutils.Mkdirs("d1", "d2")
testutils.Mkfile("d1", "empty", "")
testutils.Mkfile("d2", "stuff", "foo\n")
node1 := NewFileNode("d1/empty")
node2 := NewFileNode("d2/stuff")
node3 := NewFileNode("nonexistent")
expect := []byte{}
hash := fnv.New64a()
assert.Equal(t, 8, hash.Size())
expect = hash.Sum(expect)
sig, err := node1.Signature()
assert.Nil(t, err)
assert.Equal(t, expect, sig)
hash.Write([]byte{'f', 'o', 'o', '\n'})
expect = expect[:0]
expect = hash.Sum(expect)
sig, err = node2.Signature()
assert.Nil(t, err)
assert.Equal(t, expect, sig)
// make sure it's cached, i.e. changes to the file are not seen by
// the same FileNode object in the same process
testutils.Mkfile("d2", "stuff", "fooo\n")
sig, err = node2.Signature()
assert.Nil(t, err)
assert.Equal(t, expect, sig)
// in fact, even if the file disappears, we still have its signature
err = os.Remove("d2/stuff")
if err != nil {
panic(err)
}
sig, err = node2.Signature()
assert.Nil(t, err)
assert.Equal(t, expect, sig)
sig, err = node3.Signature()
assert.NotNil(t, err)
assert.Equal(t, "open nonexistent: no such file or directory", err.Error())
}
func Test_findScripts(t *testing.T) {
cleanup := testutils.Chtemp()
defer cleanup()
var script string
var err error
// case 1: user specifies the script to run, regardless of whether
// it exists or not
script, err = findScript("foo")
assert.Equal(t, "foo", script)
assert.Nil(t, err)
// case 2: no *.fubsy files in current dir
script, err = findScript("")
assert.Equal(t,
"main.fubsy not found (and no other *.fubsy files found)",
err.Error())
// case 3: only main.fubsy exists
testutils.TouchFiles("main.fubsy")
script, err = findScript("")
assert.Equal(t, "main.fubsy", script)
assert.Nil(t, err)
// case 4: multiple *.fubsy files exist, including main.fubsy
testutils.TouchFiles("a.fubsy", "b.fubsy")
script, err = findScript("")
assert.Equal(t, "main.fubsy", script)
assert.Nil(t, err)
// case 5: multiple *.fubsy files exist, not including main.fubsy
remove("main.fubsy")
script, err = findScript("")
assert.Equal(t, "", script)
assert.True(t,
strings.HasPrefix(
err.Error(),
"main.fubsy not found, and multiple *.fubsy files exist",
))
// case 6: exactly one *.fubsy file exists, and it's not main.fubsy
remove("a.fubsy")
script, err = findScript("")
assert.Equal(t, "b.fubsy", script)
assert.Nil(t, err)
}
func Test_remove(t *testing.T) {
cleanup := testutils.Chtemp()
defer cleanup()
args := RuntimeArgs{
BasicArgs: types.MakeBasicArgs(nil, []types.FuObject{}, nil),
}
// remove() doesn't care about empty arg list (same reason as mkdir())
result, errs := fn_remove(args)
assert.Nil(t, result)
assert.Equal(t, 0, len(errs))
// remove() ignores non-existent files
args.SetArgs(types.MakeStringList("foo", "bar/bleep/meep", "qux").List())
result, errs = fn_remove(args)
assert.Nil(t, result)
assert.Equal(t, 0, len(errs))
// remove() removes regular files
testutils.TouchFiles("foo", "bar/bleep/meep", "bar/bleep/feep", "qux")
args.SetArgs(types.MakeStringList("foo", "bar/bleep/meep", "bogus").List())
result, errs = fn_remove(args)
assert.Nil(t, result)
assert.Equal(t, 0, len(errs))
assert.Equal(t, []string{"bar", "qux"}, dirContents("."))
assert.Equal(t, []string{"bleep"}, dirContents("bar"))
assert.Equal(t, []string{"feep"}, dirContents("bar/bleep"))
// remove() removes files and directories too
testutils.TouchFiles("foo", "bar/bleep/meep", "qux")
args.SetArgs(types.MakeStringList("bogus", "bar", "morebogus", "qux").List())
result, errs = fn_remove(args)
assert.Nil(t, result)
assert.Equal(t, 0, len(errs))
assert.Equal(t, []string{"foo"}, dirContents("."))
// remove() fails if it tries to delete from an unwriteable directory
testutils.TouchFiles("bar/bong", "qux/bip")
testutils.ChmodRO("bar")
defer testutils.ChmodOwnerAll("bar")
args.SetArgs(types.MakeStringList("bar", "qux").List())
result, errs = fn_remove(args)
assert.Nil(t, result)
assert.Equal(t, "remove bar/bong: permission denied", errs[0].Error())
}
func Test_FinderNode_Expand_empty(t *testing.T) {
cleanup := testutils.Chtemp()
defer cleanup()
// no patterns, no files: of course we find nothing
finder := &FinderNode{}
assertExpand(t, nil, []string{}, finder)
// patterns, but no files: still nothing
finder.includes = []string{"**/*.c", "include/*.h", "*/*.txt"}
assertExpand(t, nil, []string{}, finder)
// no patterns, some files: still nothing
finder.includes = finder.includes[0:0]
testutils.TouchFiles(
"lib1/foo.c", "lib1/sub/blah.c", "include/bop.h", "include/bip.h")
assertExpand(t, nil, []string{}, finder)
}
func Test_KyotoDB_basics(t *testing.T) {
cleanup := testutils.Chtemp()
defer cleanup()
db, err := OpenKyotoDB("test1.kch", true)
assert.NotNil(t, db.kcdb)
if err != nil {
t.Fatal(err)
}
rec1 := NewBuildRecord()
rec1.SetTargetSignature([]byte{})
err = db.WriteNode("node0", rec1)
assert.Nil(t, err)
rec2, err := db.LookupNode("node0")
assert.Nil(t, err)
assert.True(t, rec1.Equal(rec2))
// Make sure it works across database close/reopen.
rec1.AddParent("node1", []byte{34})
rec1.AddParent("node2", []byte{54, 63})
rec1.SetTargetSignature([]byte{200, 150, 100})
enc, err := rec1.encode()
assert.Nil(t, err)
rec2 = NewBuildRecord()
err = rec2.decode(enc)
err = db.WriteNode("node0", rec1)
assert.Nil(t, err)
err = db.Close()
assert.Nil(t, err)
db, err = OpenKyotoDB("test1.kch", false) // open read-only
if err != nil {
t.Fatal(err)
}
rec2, err = db.LookupNode("node0")
assert.Nil(t, err)
assert.True(t, rec1.Equal(rec2),
"wrote record:\n%#v\nand got back:\n%#v",
rec1, rec2)
}
func Test_FinderNode_Expand_double_recursion(t *testing.T) {
// Java programmers love this sort of insanely deep structure, and
// Ant supports patterns with multiple occurences of "**" ... so I
// guess Fubsy has to support them too!
cleanup := testutils.Chtemp()
defer cleanup()
testutils.TouchFiles(
"app1/src/main/org/example/app1/App1.java",
"app1/src/main/org/example/app1/Util.java",
"app1/src/main/org/example/app1/doc.txt",
"app1/src/main/org/example/app1/subpkg/Stuff.java",
"app1/src/main/org/example/app1/subpkg/MoreStuff.java",
"app1/src/test/org/example/app1/StuffTest.java",
"misc/app2/src/main/org/example/app2/App2.java",
"misc/app3/src/main/org/example/app3/App3.java",
"misc/app3/src/main/org/example/app3/Helpers.java",
"misc/app3/src/test/org/example/app3/TestHelpers.java",
"misc/app3/src/test/org/example/app3/testdata",
)
var finder *FinderNode
var expect []string
finder = NewFinderNode("**/test/**/*.java")
expect = []string{
"app1/src/test/org/example/app1/StuffTest.java",
"misc/app3/src/test/org/example/app3/TestHelpers.java",
}
assertExpand(t, nil, expect, finder)
finder = NewFinderNode("**/test/**/*")
expect = []string{
"app1/src/test/org/example/app1/StuffTest.java",
"misc/app3/src/test/org/example/app3/TestHelpers.java",
"misc/app3/src/test/org/example/app3/testdata",
}
assertExpand(t, nil, expect, finder)
finder = NewFinderNode("**/test/**")
assertExpand(t, nil, expect, finder)
}
func Test_FileNode_Changed(t *testing.T) {
// this is really a test of Signature() + Changed() together, because
// Changed() itself is so trivial that testing it is no challenge
cleanup := testutils.Chtemp()
defer cleanup()
testutils.Mkfile(".", "stuff.txt", "blah blah blah\n")
node := NewFileNode("stuff.txt")
osig, err := node.Signature()
assert.Nil(t, err)
// construct a new FileNode so the cache is lost
node = NewFileNode("stuff.txt")
nsig, err := node.Signature()
assert.Nil(t, err)
assert.False(t, node.Changed(osig, nsig))
// modify the file and repeat
testutils.Mkfile(".", "stuff.txt", "blah blah blah\nblah")
node = NewFileNode("stuff.txt")
nsig, err = node.Signature()
assert.Nil(t, err)
assert.True(t, node.Changed(osig, nsig))
}
func Test_FileNode_Exists(t *testing.T) {
cleanup := testutils.Chtemp()
defer cleanup()
testutils.TouchFiles("foo.txt", "a/a/a/a/foo.txt", "a/b/unreadable")
testutils.ChmodNoAccess("a/b")
defer testutils.ChmodOwnerAll("a/b")
dag := NewDAG()
tests := []struct {
name string
exists bool
err string
}{
{"foo.txt", true, ""},
{"a/a/a", false, "stat a/a/a: is a directory, not a regular file"},
{"a/a/a/bogus", false, ""},
{"a/a/a/a/foo.txt", true, ""},
{"a/b/unreadable", false, "stat a/b/unreadable: permission denied"},
}
for _, test := range tests {
node := MakeFileNode(dag, test.name)
exists, err := node.Exists()
if test.err != "" {
assert.NotNil(t, err)
assert.Equal(t, test.err, err.Error())
}
if test.exists && !exists {
t.Errorf("%v: expected Exists() true, got false", node)
} else if !test.exists && exists {
t.Errorf("%v: expected Exists() false, got true", node)
}
}
}
func Test_KyotoDB_checkVersion(t *testing.T) {
cleanup := testutils.Chtemp()
defer cleanup()
// brand-new empty DB with no version number in it
db := KyotoDB{}
db.kcdb = cabinet.New()
filename := "test.kch"
err := db.kcdb.Open(filename, cabinet.KCOWRITER|cabinet.KCOCREATE)
if err != nil {
t.Fatal(err)
}
// checkVersion() on an empty DB in read-only mode fails, because
// it can neither read nor write the version number
err = db.checkVersion(filename, false, 0, 0, 0)
expect := "database test.kch has no version number"
if err == nil || err.Error() != expect {
t.Errorf("expected error %s, but got %v", expect, err)
}
// in write mode it's OK, and sets the version number in the file
err = db.checkVersion(filename, true, 513, 513, 513)
assert.Nil(t, err)
versionkey := makekey(PREFIX_META, "version")
val, err := db.kcdb.Get(versionkey)
assert.Nil(t, err)
assert.Equal(t, "\x00\x00\x02\x01", string(val))
// once the version number is in the file, write mode doesn't
// matter -- now it's down to comparing with the supported range
// of versions
err = db.checkVersion(filename, false, 513, 134, 231)
expect = "database test.kch is from the future (database version = 513, but max supported version = 231)"
if err == nil || err.Error() != expect {
t.Errorf("expected error\n%s\nbut got\n%v", expect, err)
}
err = db.checkVersion(filename, false, 513, 534, 546)
expect = "database test.kch is too old (database version = 513, but min supported version = 534)"
if err == nil || err.Error() != expect {
t.Errorf("expected error\n%s\nbut got\n%v", expect, err)
}
err = db.checkVersion(filename, false, 513, 512, 514)
assert.Nil(t, err)
err = db.checkVersion(filename, false, 513, 513, 513)
assert.Nil(t, err)
err = db.checkVersion(filename, false, 513, 512, 513)
assert.Nil(t, err)
err = db.checkVersion(filename, false, 513, 513, 514)
assert.Nil(t, err)
// corrupt version number
err = db.kcdb.Set(versionkey, []byte{0, 0x43, 0})
assert.Nil(t, err)
err = db.checkVersion(filename, false, 513, 513, 513)
expect = "database test.kch: unable to decode version number (004300)"
if err == nil || err.Error() != expect {
t.Errorf("expected error\n%s\nbut got\n%v", expect, err)
}
}