1 files changed, 39 insertions, 0 deletions
diff --git a/logging/writer_test.go b/logging/writer_test.go
new file mode 100644
index 0000000..3e2897d
--- /dev/null
+++ b/logging/writer_test.go
@@ -0,0 +1,39 @@
+package logging_test
+
+import (
+	"bytes"
+	"encoding/json"
+	"log/slog"
+	"testing"
+	"testing/slogtest"
+
+	"go.sudomsg.com/kit/logging"
+)
+
+func TestWriterHandler(t *testing.T) {
+	var buf bytes.Buffer
+
+	slogtest.Run(t,
+		func(t *testing.T) slog.Handler {
+			buf.Reset()
+			sink := logging.NewWriterSink(&buf, logging.JSONEncoder, slog.LevelDebug, nil)
+			return logging.NewSinkHandler(sink)
+		},
+		func(t *testing.T) map[string]any {
+			t.Helper()
+
+			if buf.Len() == 0 {
+				t.Fatal("buffer is empty; no log was written")
+			}
+			b := buf.Bytes()
+			r := bytes.NewReader(b)
+			dec := json.NewDecoder(r)
+			m := make(map[string]any)
+			if err := dec.Decode(&m); err != nil {
+				t.Fatalf("%v", err)
+			}
+
+			return m
+		},
+	)
+}