fixup! ci(hexagon): add spec test workflow under qemu-hexagon user-mode

Fix three issues in the spec test harness for qemu-hexagon user-mode:

- runtest.py: handle None return from invoke() on timeout instead of
  crashing with TypeError, and fix undefined variable r.buf -> runner.buf
- all.py: only pass --qemu/--qemu-firmware to runtest.py when firmware
  is set (user-mode QEMU has no firmware); always increase timeouts to
  120s when qemu_flag is active
- test_wamr.sh: always pass --qemu to all.py when -Q is set, not only
  when -F (firmware) is also provided

Author: androm3da

tests/wamr-test-suites/spec-test-script/all.py

@@ -234,9 +234,15 @@ def test_case(
         CMD.append("--eh")
 
     if qemu_flag:
-        CMD.append("--qemu")
-        CMD.append("--qemu-firmware")
-        CMD.append(qemu_firmware)
+        if qemu_firmware:
+            CMD.append("--qemu")
+            CMD.append("--qemu-firmware")
+            CMD.append(qemu_firmware)
+        # Increase timeouts for QEMU emulation (default: 30s start, 20s test)
+        CMD.append("--start-timeout")
+        CMD.append("120")
+        CMD.append("--test-timeout")
+        CMD.append("120")
 
     if not clean_up_flag:
         CMD.append("--no_cleanup")

tests/wamr-test-suites/spec-test-script/runtest.py

@@ -268,7 +268,7 @@ def assert_prompt(runner, prompts, timeout, is_need_execute_result):
             log("Started with:\n%s" % header)
     else:
         log("Did not one of following prompt(s): %s" % repr(prompts))
-        log("    Got      : %s" % repr(r.buf))
+        log("    Got      : %s" % repr(runner.buf))
         raise Exception("Did not one of following prompt(s)")
 
 
@@ -781,6 +781,8 @@ def is_result_match_expected(out, expected):
 def test_assert(r, opts, mode, cmd, expected):
     log("Testing(%s) %s = %s" % (mode, cmd, expected))
     out = invoke(r, opts, cmd)
+    if out is None:
+        raise Exception("Timed out waiting for response to: %s" % cmd)
     if '\n' in out or ' ' in out:
         outs = [''] + out.split('\n')[1:]
         out = outs[-1]

tests/wamr-test-suites/test_wamr.sh

@@ -632,9 +632,11 @@ function spec_test()
         fi
     fi
 
-    if [[ ${ENABLE_QEMU} == 1 ]] && [[ -n ${QEMU_FIRMWARE} ]]; then
+    if [[ ${ENABLE_QEMU} == 1 ]]; then
         ARGS_FOR_SPEC_TEST+="--qemu "
-        ARGS_FOR_SPEC_TEST+="--qemu-firmware ${QEMU_FIRMWARE} "
+        if [[ -n ${QEMU_FIRMWARE} ]]; then
+            ARGS_FOR_SPEC_TEST+="--qemu-firmware ${QEMU_FIRMWARE} "
+        fi
     fi
 
     if [[ ${PLATFORM} == "windows" ]]; then