feat(gl): scaffold general ledger grpc service

infrastructure/config/config_test.go

@@ -0,0 +1,46 @@
+package config
+
+import (
+	"os"
+	"path/filepath"
+	"testing"
+	"time"
+)
+
+func TestLoadUsesDefaultsAndOverrides(t *testing.T) {
+	dir := t.TempDir()
+	path := filepath.Join(dir, "gl.toml")
+	contents := []byte("[grpc]\nport = 0\nshutdown-timeout = \"3s\"\n")
+	if err := os.WriteFile(path, contents, 0o600); err != nil {
+		t.Fatal(err)
+	}
+
+	cfg, err := Load(path)
+	if err != nil {
+		t.Fatal(err)
+	}
+	if cfg.GRPC.Port != 0 || cfg.GRPC.ShutdownTimeout != 3*time.Second {
+		t.Fatalf("unexpected grpc config: %+v", cfg.GRPC)
+	}
+	if cfg.Database.Name != "gl_db" || cfg.Database.Port != 5432 {
+		t.Fatalf("unexpected database defaults: %+v", cfg.Database)
+	}
+}
+
+func TestLoadRejectsInvalidConfiguration(t *testing.T) {
+	dir := t.TempDir()
+	path := filepath.Join(dir, "gl.toml")
+	if err := os.WriteFile(path, []byte("[grpc]\nshutdown-timeout = \"0s\"\n"), 0o600); err != nil {
+		t.Fatal(err)
+	}
+
+	if _, err := Load(path); err == nil {
+		t.Fatal("expected validation error")
+	}
+}
+
+func TestLoadReturnsMissingFileError(t *testing.T) {
+	if _, err := Load(filepath.Join(t.TempDir(), "missing.toml")); err == nil {
+		t.Fatal("expected missing file error")
+	}
+}