test: move export test to CI folder

- Moved export test from _demo/embedded/export_test/ to test/export_test.go
- Converted shell-based test to Go test for better CI integration
- Test verifies that //export directive correctly exports functions with different symbol names
- Fixed test to use repository version of llgo instead of system-installed version

Generated with [codeagent](https://github.com/qbox/codeagent)
Co-authored-by: luoliwoshang <51194195+luoliwoshang@users.noreply.github.com>

_demo/embedded/export_test/main.go

@@ -1,22 +0,0 @@
-package main
-
-//export LPSPI2_IRQHandler
-func interruptLPSPI2() {
-	println("LPSPI2 interrupt handled")
-}
-
-//export SysTick_Handler
-func systemTickHandler() {
-	println("System tick")
-}
-
-//export Add
-func Add(a, b int) int {
-	return a + b
-}
-
-func main() {
-	interruptLPSPI2()
-	systemTickHandler()
-	println("Add(2, 3) =", Add(2, 3))
-}

_demo/embedded/export_test/test.sh

@@ -1,43 +0,0 @@
-#!/bin/bash
-set -e
-
-echo "Testing //export with different symbol names..."
-
-# Set LLGO_ROOT to repository root
-export LLGO_ROOT=/workspace
-
-# Build the test program
-echo "Building test program..."
-/workspace/llgo build -o test_export main.go || exit 1
-
-# Check for expected symbols using nm
-echo "Verifying symbols with nm..."
-
-# Should find LPSPI2_IRQHandler (not interruptLPSPI2)
-if nm test_export | grep -q "T LPSPI2_IRQHandler"; then
-    echo "✓ Symbol LPSPI2_IRQHandler found"
-else
-    echo "✗ Symbol LPSPI2_IRQHandler not found"
-    echo "Available symbols:"
-    nm test_export | grep " T "
-    exit 1
-fi
-
-# Should find SysTick_Handler (not systemTickHandler)
-if nm test_export | grep -q "T SysTick_Handler"; then
-    echo "✓ Symbol SysTick_Handler found"
-else
-    echo "✗ Symbol SysTick_Handler not found"
-    exit 1
-fi
-
-# Should find Add (same name)
-if nm test_export | grep -q "T Add"; then
-    echo "✓ Symbol Add found"
-else
-    echo "✗ Symbol Add not found"
-    exit 1
-fi
-
-echo ""
-echo "All symbol checks passed! ✓"

test/export_test.go

@@ -0,0 +1,160 @@
+//go:build !llgo
+// +build !llgo
+
+package test
+
+import (
+	"os"
+	"os/exec"
+	"path/filepath"
+	"strings"
+	"testing"
+)
+
+// TestExportSymbolNames tests that //export directive supports different symbol names
+// This is essential for embedded development where hardware specifications require
+// specific symbol names (e.g., ARM Cortex-M interrupt handlers).
+func TestExportSymbolNames(t *testing.T) {
+	// Create temporary directory for test
+	tmpDir, err := os.MkdirTemp("", "llgo-export-test-*")
+	if err != nil {
+		t.Fatal(err)
+	}
+	defer os.RemoveAll(tmpDir)
+
+	// Write test program
+	testCode := `package main
+
+//export LPSPI2_IRQHandler
+func interruptLPSPI2() {
+	println("LPSPI2 interrupt handled")
+}
+
+//export SysTick_Handler
+func systemTickHandler() {
+	println("System tick")
+}
+
+//export Add
+func Add(a, b int) int {
+	return a + b
+}
+
+func main() {
+	interruptLPSPI2()
+	systemTickHandler()
+	println("Add(2, 3) =", Add(2, 3))
+}
+`
+	mainGo := filepath.Join(tmpDir, "main.go")
+	if err := os.WriteFile(mainGo, []byte(testCode), 0644); err != nil {
+		t.Fatal(err)
+	}
+
+	// Get llgo binary path
+	llgoPath := findLLGo(t)
+
+	// Build the test program
+	testBinary := filepath.Join(tmpDir, "test_export")
+	cmd := exec.Command(llgoPath, "build", "-o", testBinary, mainGo)
+	cmd.Env = append(os.Environ(), "LLGO_ROOT="+findLLGORoot(t))
+	if output, err := cmd.CombinedOutput(); err != nil {
+		t.Fatalf("Build failed: %v\nOutput: %s", err, output)
+	}
+
+	// Check for expected symbols using nm
+	nmCmd := exec.Command("nm", testBinary)
+	nmOutput, err := nmCmd.CombinedOutput()
+	if err != nil {
+		t.Fatalf("nm command failed: %v\nOutput: %s", err, nmOutput)
+	}
+
+	nmStr := string(nmOutput)
+
+	// Verify LPSPI2_IRQHandler symbol exists (not interruptLPSPI2)
+	if !strings.Contains(nmStr, "LPSPI2_IRQHandler") {
+		t.Errorf("Symbol LPSPI2_IRQHandler not found in binary")
+		t.Logf("Available symbols:\n%s", nmStr)
+	}
+
+	// Verify SysTick_Handler symbol exists (not systemTickHandler)
+	if !strings.Contains(nmStr, "SysTick_Handler") {
+		t.Errorf("Symbol SysTick_Handler not found in binary")
+		t.Logf("Available symbols:\n%s", nmStr)
+	}
+
+	// Verify Add symbol exists (same name)
+	if !strings.Contains(nmStr, "Add") {
+		t.Errorf("Symbol Add not found in binary")
+		t.Logf("Available symbols:\n%s", nmStr)
+	}
+
+	// Verify that the original function names are NOT exported
+	// (they should only appear as internal symbols, not exported with 'T')
+	lines := strings.Split(nmStr, "\n")
+	for _, line := range lines {
+		if strings.Contains(line, " T ") || strings.Contains(line, " t ") {
+			if strings.Contains(line, "interruptLPSPI2") {
+				t.Errorf("Unexpected exported symbol: interruptLPSPI2 (should be LPSPI2_IRQHandler)")
+			}
+			if strings.Contains(line, "systemTickHandler") {
+				t.Errorf("Unexpected exported symbol: systemTickHandler (should be SysTick_Handler)")
+			}
+		}
+	}
+}
+
+// findLLGo finds the llgo binary
+func findLLGo(t *testing.T) string {
+	t.Helper()
+
+	// Always use the repository version for testing to ensure we test the latest code
+	root := findLLGORoot(t)
+	llgoPath := filepath.Join(root, "llgo")
+
+	// Check if it exists
+	if _, err := os.Stat(llgoPath); err == nil {
+		return llgoPath
+	}
+
+	// Try to build it
+	cmd := exec.Command("go", "build", "-o", llgoPath, "./cmd/llgo")
+	cmd.Dir = root
+	if err := cmd.Run(); err != nil {
+		t.Skipf("llgo cannot be built: %v", err)
+	}
+
+	return llgoPath
+}
+
+// findLLGORoot finds the LLGO repository root
+func findLLGORoot(t *testing.T) string {
+	t.Helper()
+
+	// Check LLGO_ROOT environment variable
+	if root := os.Getenv("LLGO_ROOT"); root != "" {
+		return root
+	}
+
+	// Try to find it relative to this test file
+	wd, err := os.Getwd()
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	// Walk up to find go.mod
+	dir := wd
+	for {
+		if _, err := os.Stat(filepath.Join(dir, "go.mod")); err == nil {
+			return dir
+		}
+		parent := filepath.Dir(dir)
+		if parent == dir {
+			break
+		}
+		dir = parent
+	}
+
+	t.Fatal("Cannot find LLGO_ROOT")
+	return ""
+}