feat(notify): read timeouts and caps from config.json

A missing or broken file is the defaults, so a hand typo never stops the
daemon; a key of the wrong type keeps its default while the rest applies.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

1 files changed, 65 insertions, 0 deletions

diff --git a/internal/notify/config_test.go b/internal/notify/config_test.go
new file mode 100644
index 0000000..46032ee
--- /dev/null
+++ b/internal/notify/config_test.go
@@ -0,0 +1,65 @@
+// Copyright (C) 2026 Danilo M. <danix@danix.xyz>
+//
+// This program is free software; you can redistribute it and/or modify
+// it under the terms of the GNU General Public License version 2 as
+// published by the Free Software Foundation.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+// GNU General Public License for more details.
+
+package notify
+
+import (
+	"os"
+	"path/filepath"
+	"testing"
+)
+
+func writeConfig(t *testing.T, body string) string {
+	t.Helper()
+	p := filepath.Join(t.TempDir(), "config.json")
+	if err := os.WriteFile(p, []byte(body), 0o600); err != nil {
+		t.Fatal(err)
+	}
+	return p
+}
+
+func TestLoadConfigMissingFileIsDefaults(t *testing.T) {
+	got := LoadConfig(filepath.Join(t.TempDir(), "absent.json"))
+	if got != DefaultConfig() {
+		t.Errorf("got %+v, want defaults", got)
+	}
+}
+
+func TestLoadConfigMalformedIsDefaults(t *testing.T) {
+	got := LoadConfig(writeConfig(t, `{"liveCap": 5,`))
+	if got != DefaultConfig() {
+		t.Errorf("got %+v, want defaults", got)
+	}
+}
+
+func TestLoadConfigPartialMergesOverDefaults(t *testing.T) {
+	got := LoadConfig(writeConfig(t, `{"timeouts": {"low": 3}, "historyCap": 50, "muted": ["x"]}`))
+	want := DefaultConfig()
+	want.Timeouts.Low = 3
+	want.HistoryCap = 50
+	if got != want {
+		t.Errorf("got %+v, want %+v", got, want)
+	}
+}
+
+func TestLoadConfigWrongTypeKeepsThatDefault(t *testing.T) {
+	got := LoadConfig(writeConfig(t, `{"liveCap": "many", "historyCap": 7}`))
+	if got.LiveCap != 20 || got.HistoryCap != 7 {
+		t.Errorf("got live %d history %d, want 20 and 7", got.LiveCap, got.HistoryCap)
+	}
+}
+
+func TestLoadConfigClamps(t *testing.T) {
+	got := LoadConfig(writeConfig(t, `{"liveCap": 0, "historyCap": 1000, "timeouts": {"normal": -4}}`))
+	if got.LiveCap != 1 || got.HistoryCap != 100 || got.Timeouts.Normal != 10 {
+		t.Errorf("got %+v", got)
+	}
+}