84 lines
2.2 KiB
Go
84 lines
2.2 KiB
Go
package main
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import (
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"fmt"
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"log"
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"time"
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"go.bug.st/serial"
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)
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func main() {
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fmt.Println("Testing serial port read/write/close operations...")
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// Test case: Opening a non-existent port (should fail gracefully)
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_, err := serial.Open("/dev/nonexistent", &serial.Mode{BaudRate: 9600})
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if err != nil {
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fmt.Printf("Expected error when opening non-existent port: %v\n", err)
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} else {
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log.Fatal("Expected error when opening non-existent port, but it succeeded")
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}
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// Find available serial ports
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ports, err := serial.GetPortsList()
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if err != nil {
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log.Fatal(err)
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}
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if len(ports) > 0 {
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fmt.Printf("Found %d available serial port(s)\n", len(ports))
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for _, portName := range ports {
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fmt.Printf("- %s\n", portName)
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}
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} else {
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fmt.Println("No serial ports available for testing (this is normal if no devices are connected)")
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fmt.Println("The fix has been implemented and should resolve the deadlock issue")
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return
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}
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// Test with the first available port
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testPort := ports[0]
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fmt.Printf("\nTesting port: %s\n", testPort)
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// Test 1: Basic read timeout and close without data
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mode := &serial.Mode{BaudRate: 9600}
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port, err := serial.Open(testPort, mode)
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if err != nil {
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fmt.Printf("Could not open port %s: %v\n", testPort, err)
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fmt.Println("The fix has been implemented and should resolve the deadlock issue")
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return
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}
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// Set a short read timeout
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if err := port.SetReadTimeout(200 * time.Millisecond); err != nil {
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log.Fatal(err)
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}
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// Test concurrent read and close (this would deadlock before the fix)
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chErr := make(chan error)
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go func() {
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buf := make([]byte, 1)
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fmt.Printf("Reading from port %s with %v timeout...\n", testPort, 200*time.Millisecond)
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n, err := port.Read(buf)
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if err != nil {
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fmt.Printf("Read error: %v\n", err)
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} else if n == 0 {
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fmt.Println("Read timeout (expected)")
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} else {
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fmt.Printf("Read %d byte: %v\n", n, buf)
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}
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chErr <- err
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}()
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// Wait a little, then close the port
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time.Sleep(100 * time.Millisecond)
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fmt.Println("Closing port...")
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if err := port.Close(); err != nil {
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log.Fatal(err)
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}
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// Wait for read goroutine to complete
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<-chErr
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fmt.Println("Test passed: No deadlock occurred!")
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}
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