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index_test.go
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index_test.go
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package gitbase
import (
"bytes"
"io"
"testing"
"github.com/src-d/go-mysql-server/sql"
"github.com/stretchr/testify/require"
"gopkg.in/src-d/go-git.v4/plumbing"
)
func assertEncodeKey(t *testing.T, key indexKey) []byte {
data, err := encodeIndexKey(key)
require.NoError(t, err)
return data
}
type partitionIndexLookup map[string]sql.IndexValueIter
func (l partitionIndexLookup) Values(p sql.Partition) (sql.IndexValueIter, error) {
return l[string(p.Key())], nil
}
func (partitionIndexLookup) Indexes() []string { return nil }
type indexValueIter struct {
values [][]byte
pos int
}
func newIndexValueIter(values ...[]byte) sql.IndexValueIter {
return &indexValueIter{values, 0}
}
func (i *indexValueIter) Next() ([]byte, error) {
if i.pos >= len(i.values) {
return nil, io.EOF
}
v := i.values[i.pos]
i.pos++
return v, nil
}
func (i *indexValueIter) Close() error { return nil }
type keyValue struct {
key []byte
values []interface{}
}
func assertIndexKeyValueIter(t *testing.T, iter sql.PartitionIndexKeyValueIter, expected []keyValue) {
t.Helper()
require := require.New(t)
var result []keyValue
for {
_, kviter, err := iter.Next()
if err == io.EOF {
break
}
require.NoError(err)
for {
values, key, err := kviter.Next()
if err == io.EOF {
break
}
require.NoError(err)
result = append(result, keyValue{key, values})
}
require.NoError(kviter.Close())
}
require.NoError(iter.Close())
require.Equal(len(expected), len(result))
require.ElementsMatch(expected, result)
}
func tableIndexLookup(
t *testing.T,
table sql.IndexableTable,
ctx *sql.Context,
) sql.IndexLookup {
t.Helper()
iter, err := table.IndexKeyValues(ctx, nil)
require.NoError(t, err)
lookup := make(partitionIndexLookup)
for {
p, kvIter, err := iter.Next()
if err == io.EOF {
break
}
require.NoError(t, err)
var values [][]byte
for {
_, val, err := kvIter.Next()
if err == io.EOF {
break
}
require.NoError(t, err)
values = append(values, val)
}
require.NoError(t, kvIter.Close())
lookup[string(p.Key())] = newIndexValueIter(values...)
}
require.NoError(t, iter.Close())
return lookup
}
func testTableIndex(
t *testing.T,
table Table,
filters []sql.Expression,
) {
t.Helper()
require := require.New(t)
ctx, _, cleanup := setup(t)
defer cleanup()
expected, err := tableToRows(ctx, table)
require.NoError(err)
indexable := table.(sql.IndexableTable)
lookup := tableIndexLookup(t, indexable, ctx)
tbl := table.(sql.IndexableTable).WithIndexLookup(lookup)
rows, err := tableToRows(ctx, tbl)
require.NoError(err)
require.ElementsMatch(expected, rows)
expected, err = tableToRows(ctx, table.WithFilters(filters))
require.NoError(err)
lookup = tableIndexLookup(t, indexable, ctx)
tbl = table.WithFilters(filters).(sql.IndexableTable).WithIndexLookup(lookup)
rows, err = tableToRows(ctx, tbl)
require.NoError(err)
require.ElementsMatch(expected, rows)
}
func TestEncodeRoundtrip(t *testing.T) {
require := require.New(t)
k := &packOffsetIndexKey{
Repository: "/foo/bar/baz/repo.git",
Packfile: plumbing.ZeroHash.String(),
Offset: 12345,
Hash: "",
}
bs, err := encodeIndexKey(k)
require.NoError(err)
bsraw, err := k.encode()
require.NoError(err)
// check encodeIndexKey also compresses the encoded value
require.True(len(bs) < len(bsraw))
var k2 packOffsetIndexKey
require.NoError(decodeIndexKey(bs, &k2))
require.Equal(k, &k2)
}
func TestWriteReadInt64(t *testing.T) {
require := require.New(t)
var buf bytes.Buffer
writeInt64(&buf, -7)
n, err := readInt64(&buf)
require.NoError(err)
require.Equal(int64(-7), n)
_, err = buf.ReadByte()
require.Equal(err, io.EOF)
buf.Reset()
writeInt64(&buf, 7)
n, err = readInt64(&buf)
require.NoError(err)
require.Equal(int64(7), n)
_, err = buf.ReadByte()
require.Equal(err, io.EOF)
}
func TestWriteReadBool(t *testing.T) {
require := require.New(t)
var buf bytes.Buffer
writeBool(&buf, true)
b, err := readBool(&buf)
require.NoError(err)
require.True(b)
_, err = buf.ReadByte()
require.Equal(err, io.EOF)
}
func TestWriteReadString(t *testing.T) {
require := require.New(t)
var buf bytes.Buffer
writeString(&buf, "foo bar")
s, err := readString(&buf)
require.NoError(err)
require.Equal("foo bar", s)
_, err = buf.ReadByte()
require.Equal(err, io.EOF)
}
func TestWriteReadHash(t *testing.T) {
require := require.New(t)
var buf bytes.Buffer
require.Error(writeHash(&buf, ""))
require.NoError(writeHash(&buf, plumbing.ZeroHash.String()))
h, err := readHash(&buf)
require.NoError(err)
require.Equal(plumbing.ZeroHash.String(), h)
_, err = buf.ReadByte()
require.Equal(err, io.EOF)
}
func TestEncodePackOffsetIndexKey(t *testing.T) {
require := require.New(t)
k := packOffsetIndexKey{
Repository: "repo1",
Packfile: plumbing.ZeroHash.String(),
Offset: 1234,
Hash: "",
}
data, err := k.encode()
require.NoError(err)
var k2 packOffsetIndexKey
require.NoError(k2.decode(data))
require.Equal(k, k2)
k = packOffsetIndexKey{
Repository: "repo1",
Packfile: plumbing.ZeroHash.String(),
Offset: -1,
Hash: plumbing.ZeroHash.String(),
}
data, err = k.encode()
require.NoError(err)
var k3 packOffsetIndexKey
require.NoError(k3.decode(data))
require.Equal(k, k3)
}