feat: initialize nuntius project with full server implementation

internal/config/config_test.go

@@ -0,0 +1,94 @@
+//go:build linux || freebsd
+
+package config
+
+import (
+	"os"
+	"path/filepath"
+	"testing"
+)
+
+func TestLoadWritesAndParsesDefault(t *testing.T) {
+	path := filepath.Join(t.TempDir(), "config.toml")
+
+	// The first Load writes the default template, then parses it back.
+	cfg, err := Load(path)
+	if err != nil {
+		t.Fatalf("Load: %v", err)
+	}
+	if cfg.Server.Port != 8080 {
+		t.Errorf("Server.Port = %d, want 8080", cfg.Server.Port)
+	}
+	if cfg.DataDir != "./data" {
+		t.Errorf("DataDir = %q, want ./data", cfg.DataDir)
+	}
+	if len(cfg.Forms) != 3 {
+		t.Fatalf("len(Forms) = %d, want 3", len(cfg.Forms))
+	}
+	if cfg.Forms[0].Name != "contact" || cfg.Forms[0].SMTP.Host != "smtp.example.com" {
+		t.Errorf("Forms[0] = %#v", cfg.Forms[0])
+	}
+	if cfg.Forms[2].RateLimitPerHour != 100 {
+		t.Errorf("newsletter rate_limit_per_hour = %d, want 100", cfg.Forms[2].RateLimitPerHour)
+	}
+}
+
+func TestLoadExpandsEnvVars(t *testing.T) {
+	path := filepath.Join(t.TempDir(), "config.toml")
+	doc := `
+data_dir = "./data"
+
+[server]
+port = 9000
+
+[[forms]]
+name = "contact"
+type = "contact"
+path = "/api/nuntius/contact"
+to = "you@example.com"
+
+  [forms.smtp]
+  host = "smtp.example.com"
+  port = 587
+  user = "u@example.com"
+  password = "${NUNTIUS_TEST_PW}"
+`
+	if err := os.WriteFile(path, []byte(doc), 0o644); err != nil {
+		t.Fatal(err)
+	}
+	t.Setenv("NUNTIUS_TEST_PW", "s3cret")
+
+	cfg, err := Load(path)
+	if err != nil {
+		t.Fatalf("Load: %v", err)
+	}
+	if cfg.Forms[0].SMTP.Password != "s3cret" {
+		t.Errorf("password = %q, want s3cret", cfg.Forms[0].SMTP.Password)
+	}
+}
+
+func TestLoadRejectsUnknownField(t *testing.T) {
+	path := filepath.Join(t.TempDir(), "config.toml")
+	doc := `
+bogus = true
+
+[server]
+port = 8080
+
+[[forms]]
+name = "contact"
+path = "/api/nuntius/contact"
+to = "you@example.com"
+
+  [forms.smtp]
+  host = "smtp.example.com"
+  port = 587
+  user = "u@example.com"
+`
+	if err := os.WriteFile(path, []byte(doc), 0o644); err != nil {
+		t.Fatal(err)
+	}
+	if _, err := Load(path); err == nil {
+		t.Fatal("expected an error for an unknown field")
+	}
+}