Add settings package: Settings file load/save/seed

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
2026-06-01 20:07:42 -04:00
parent ae5cec3dce
commit e3351b3d70
2 changed files with 140 additions and 0 deletions
@@ -0,0 +1,60 @@
+package settings
+
+import (
+	"os"
+	"path/filepath"
+	"testing"
+)
+
+func TestSaveLoadRoundTrip(t *testing.T) {
+	path := filepath.Join(t.TempDir(), "settings.json")
+	want := Settings{AIBackend: "codex", MarvinCmd: "uv run am", KnowledgePath: "/tmp/k.md"}
+	if err := Save(path, want); err != nil {
+		t.Fatalf("save: %v", err)
+	}
+	got, err := Load(path)
+	if err != nil {
+		t.Fatalf("load: %v", err)
+	}
+	if got != want {
+		t.Errorf("round trip = %+v, want %+v", got, want)
+	}
+}
+
+func TestLoadMissingFileIsError(t *testing.T) {
+	_, err := Load(filepath.Join(t.TempDir(), "nope.json"))
+	if err == nil {
+		t.Fatal("want error loading missing file, got nil")
+	}
+}
+
+func TestSeedFromEnvReadsVars(t *testing.T) {
+	t.Setenv("ANTIDRIFT_AI_BACKEND", "codex")
+	t.Setenv("ANTIDRIFT_MARVIN_CMD", "uv run am")
+	t.Setenv("ANTIDRIFT_KNOWLEDGE_FILE", "/tmp/k.md")
+	got := SeedFromEnv()
+	want := Settings{AIBackend: "codex", MarvinCmd: "uv run am", KnowledgePath: "/tmp/k.md"}
+	if got != want {
+		t.Errorf("SeedFromEnv = %+v, want %+v", got, want)
+	}
+}
+
+func TestSeedFromEnvDefaultsBackend(t *testing.T) {
+	t.Setenv("ANTIDRIFT_AI_BACKEND", "")
+	t.Setenv("ANTIDRIFT_MARVIN_CMD", "")
+	t.Setenv("ANTIDRIFT_KNOWLEDGE_FILE", "")
+	got := SeedFromEnv()
+	if got.AIBackend != "claude" {
+		t.Errorf("default backend = %q, want claude", got.AIBackend)
+	}
+}
+
+func TestSaveCreatesDir(t *testing.T) {
+	path := filepath.Join(t.TempDir(), "sub", "settings.json")
+	if err := Save(path, Settings{AIBackend: "claude"}); err != nil {
+		t.Fatalf("save: %v", err)
+	}
+	if _, err := os.Stat(path); err != nil {
+		t.Fatalf("file not written: %v", err)
+	}
+}