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jsondb: Allow passing nil as document to Read()

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This makes Read() usable in situations where only the existence of a
value has to be checked.
This commit is contained in:
Lars Karlitski 2020-05-10 17:38:03 +02:00 • committed by Tom Gundersen
parent e599a95067
commit 7592e38d3d
2 changed files with 40 additions and 4 deletions
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33
internal/jsondb/db_test.go
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@ -72,6 +72,39 @@ func TestCorrupt(t *testing.T) {
require.Error(t, err)
}
func TestRead(t *testing.T) {
dir, err := ioutil.TempDir("", "jsondb-test-")
require.NoError(t, err)
defer cleanupTempDir(t, dir)
err = ioutil.WriteFile(path.Join(dir, "one.json"), []byte("true"), 0755)
require.NoError(t, err)
db := jsondb.New(dir, 0755)
var b bool
exists, err := db.Read("one", &b)
require.NoError(t, err)
require.True(t, exists)
require.True(t, b)
// nil means don't deserialize
exists, err = db.Read("one", nil)
require.NoError(t, err)
require.True(t, exists)
b = false
exists, err = db.Read("two", &b)
require.NoError(t, err)
require.False(t, exists)
require.False(t, b)
// nil means don't deserialize
exists, err = db.Read("two", nil)
require.NoError(t, err)
require.False(t, exists)
}
func TestMultiple(t *testing.T) {
dir, err := ioutil.TempDir("", "jsondb-test-")
require.NoError(t, err)