test: test userdb lookups

Signed-off-by: Djalal Harouni <[email protected]>

pkg/reader/userdb/userdb_test.go

@@ -0,0 +1,27 @@
+// SPDX-License-Identifier: Apache-2.0
+// Copyright Authors of Tetragon
+
+package userdb
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func TestUsersRecords(t *testing.T) {
+	name, err := UsersCache.lookupUser(0)
+	assert.Error(t, err)
+	assert.Empty(t, name)
+
+	UsersCache.addUser(0, "root")
+	name, err = UsersCache.lookupUser(0)
+	assert.NoError(t, err)
+	assert.Equal(t, "root", name)
+
+	name, err = UsersCache.LookupUser(2)
+	assert.NoError(t, err)
+	name2, err := UsersCache.lookupUser(2)
+	assert.NoError(t, err)
+	assert.Equal(t, name, name2)
+}