test: gate go-libraries integration tests behind -tags=integration

Assisted-by: GLM 5.2

parser/integration_test.go

@@ -0,0 +1,39 @@
+// Copyright (c) 2026 Petr Balvín <opensource@petrbalvin.org> (https://petrbalvin.org)
+// SPDX-License-Identifier: BSD-3-Clause
+
+//go:build integration
+
+// Package parser 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 ./parser/
+package parser
+
+import (
+	"os"
+	"path/filepath"
+	"testing"
+)
+
+// TestParseRealGoLibraries parses every .s file in the sibling go-libraries
+// repository when it is checked out, asserting a clean, error-free parse.
+func TestParseRealGoLibraries(t *testing.T) {
+	matches, _ := filepath.Glob("../../go-libraries/go-*/*.s")
+	if len(matches) == 0 {
+		t.Skip("go-libraries repository not present next to gasm-devkit")
+	}
+	for _, path := range matches {
+		src, err := os.ReadFile(path)
+		if err != nil {
+			t.Fatalf("read %s: %v", path, err)
+		}
+		file, errs := Parse(path, string(src))
+		if len(errs) > 0 {
+			t.Errorf("parse %s: %v", path, errs)
+			continue
+		}
+		if len(texts(file)) == 0 {
+			t.Errorf("parse %s: no TEXT functions found", path)
+		}
+		t.Logf("%s: %d decls, %d functions", filepath.Base(path), len(file.Decls), len(texts(file)))
+	}
+}