Initial project import

tools/v/vlib/os/signal_test.v

@@ -0,0 +1,48 @@
+import os
+
+fn former_handler(signal os.Signal) {
+	println('former_handler')
+	exit(0)
+}
+
+fn default_handler(signal os.Signal) {
+	println('default_handler')
+	exit(0)
+}
+
+fn test_signal_opt() {
+	os.signal_opt(.int, default_handler) or { assert false }
+}
+
+fn test_signal_opt_invalid_argument() {
+	// Can't register a signal on SIGKILL
+	if _ := os.signal_opt(.kill, default_handler) {
+		assert false
+	}
+	os.signal_opt(.kill, default_handler) or {
+		assert err.str() == 'Invalid argument; code: 22'
+		assert err.msg() == 'Invalid argument'
+		assert err.code() == 22
+	}
+}
+
+fn test_signal_opt_return_former_handler() {
+	func1 := os.signal_opt(.term, former_handler) or { panic('unexpected error') }
+	assert isnil(func1)
+	func2 := os.signal_opt(.term, default_handler) or { panic('unexpected error') }
+	assert !isnil(func2)
+	// this should work, but makes the CI fail because of a bug in clang -fsanitize=memory
+	// assert func2 == former_handler
+}
+
+fn signal_ignore_in_background_thread() {
+	os.signal_ignore(.pipe, .urg)
+	assert true
+}
+
+fn test_signal_ignore() {
+	os.signal_ignore(.pipe, .urg)
+	assert true
+	t := spawn signal_ignore_in_background_thread()
+	t.wait()
+}