// Copyright (c) 2026 Petr Balvín <opensource@petrbalvin.org> (https://petrbalvin.org)
// SPDX-License-Identifier: BSD-3-Clause

//go:build integration

// Package format integration tests against the production go-libraries kernels.
// Excluded from the default test run so coverage is identical locally and in CI.
// Run explicitly with:  go test -tags=integration ./format/
package format

import (
	"os"
	"path/filepath"
	"strings"
	"testing"

	"sourcedock.dev/petrbalvin/gasm-devkit/parser"
)

// TestRoundTripRealGoLibraries checks that formatting the production kernels
// still produces source that parses cleanly.
func TestRoundTripRealGoLibraries(t *testing.T) {
	real, _ := filepath.Glob("../../go-libraries/go-*/*.s")
	if len(real) == 0 {
		t.Skip("go-libraries repository not present")
	}
	for _, path := range real {
		src, err := os.ReadFile(path)
		if err != nil {
			t.Fatal(err)
		}
		formatted := Source(string(src))
		if _, errs := parser.Parse(path, formatted); len(errs) > 0 {
			t.Errorf("formatted %s no longer parses: %v", path, errs)
		}
		if strings.TrimSpace(formatted) == "" {
			t.Errorf("formatted %s is empty", path)
		}
	}
}