Implement internal mail skill MVP

internal/config/config_test.go

@@ -0,0 +1,42 @@
+package config
+
+import (
+	"os"
+	"path/filepath"
+	"testing"
+)
+
+func TestLoadDefaultsAndEnvFile(t *testing.T) {
+	dir := t.TempDir()
+	envPath := filepath.Join(dir, ".env")
+	if err := os.WriteFile(envPath, []byte("POP3_HOST=mail.local\nSMTP_PORT=2525\nSMTP_AUTH_REQUIRED=true\nSMTP_ALLOW_INSECURE_AUTH=true\nDATA_DIR="+dir+"\n"), 0600); err != nil {
+		t.Fatal(err)
+	}
+
+	cfg, err := Load(envPath)
+	if err != nil {
+		t.Fatalf("Load() error = %v", err)
+	}
+
+	if cfg.AccountID != "default" {
+		t.Fatalf("AccountID = %q, want default", cfg.AccountID)
+	}
+	if cfg.POP3.Host != "mail.local" {
+		t.Fatalf("POP3.Host = %q", cfg.POP3.Host)
+	}
+	if cfg.POP3.Port != 110 {
+		t.Fatalf("POP3.Port = %d, want 110", cfg.POP3.Port)
+	}
+	if cfg.SMTP.Port != 2525 {
+		t.Fatalf("SMTP.Port = %d, want 2525", cfg.SMTP.Port)
+	}
+	if !cfg.SMTP.AuthRequired {
+		t.Fatal("SMTP.AuthRequired = false, want true")
+	}
+	if !cfg.SMTP.AllowInsecureAuth {
+		t.Fatal("SMTP.AllowInsecureAuth = false, want true")
+	}
+	if cfg.HTTP.Host != "127.0.0.1" || cfg.HTTP.Port != 8765 {
+		t.Fatalf("HTTP default = %s:%d", cfg.HTTP.Host, cfg.HTTP.Port)
+	}
+}