[PATCH v3 7/9] KVM: selftests: Print sticky KVM selftests runner status at bottom

[Vipin Sharma <vipinsh@google.com>]

Print current state of the KVM selftest runner during its execution.
Show it as the bottom most line, make it sticky and colored. Provide
the following information:
- Total number of tests selected for run.
- How many have executed.
- Total for each end state.

Example:

Total: 3/3 Passed: 1 Failed: 1 Skipped: 0 Timed Out: 0 No Run: 1

Signed-off-by: Vipin Sharma <vipinsh@google.com>
---
 .../testing/selftests/kvm/runner/test_runner.py | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)

diff --git a/tools/testing/selftests/kvm/runner/test_runner.py b/tools/testing/selftests/kvm/runner/test_runner.py
index e8e8fd91c1ad..42274e695b76 100644
--- a/tools/testing/selftests/kvm/runner/test_runner.py
+++ b/tools/testing/selftests/kvm/runner/test_runner.py
@@ -15,6 +15,7 @@ logger = logging.getLogger("runner")
 class TestRunner:
     def __init__(self, testcases, args):
         self.tests = []
+        self.status = {x: 0 for x in SelftestStatus}
         self.output_dir = args.output
         self.jobs = args.jobs
         self.print_stds = {
@@ -33,9 +34,18 @@ class TestRunner:
         test.run()
         return test
 
+    def _sticky_update(self):
+        print(f"\r\033[1mTotal: {self.tests_ran}/{len(self.tests)}" \
+                f"\033[32;1m Passed: {self.status[SelftestStatus.PASSED]}" \
+                f"\033[31;1m Failed: {self.status[SelftestStatus.FAILED]}" \
+                f"\033[33;1m Skipped: {self.status[SelftestStatus.SKIPPED]}"\
+                f"\033[91;1m Timed Out: {self.status[SelftestStatus.TIMED_OUT]}"\
+                f"\033[34;1m No Run: {self.status[SelftestStatus.NO_RUN]}\033[0m", end="\r")
+
     def _log_result(self, test_result):
         print_level = self.print_stds.get(test_result.status, "full")
 
+        print("\033[2K", end="\r")
         if (print_level == "full" or print_level == "stdout"):
             logger.info("*** stdout ***\n" + test_result.stdout)
         if (print_level == "full" or print_level == "stderr"):
@@ -43,8 +53,13 @@ class TestRunner:
         if (print_level != "off"):
             logger.log(test_result.status, f"[{test_result.status.name}] {test_result.test_path}")
 
+        self.status[test_result.status] += 1
+        # Sticky bottom line
+        self._sticky_update()
+
     def start(self):
         ret = 0
+        self.tests_ran = 0
 
         with concurrent.futures.ProcessPoolExecutor(max_workers=self.jobs) as executor:
             all_futures = []
@@ -54,9 +69,11 @@ class TestRunner:
 
             for future in concurrent.futures.as_completed(all_futures):
                 test_result = future.result()
+                self.tests_ran += 1
                 self._log_result(test_result)
                 if (test_result.status not in [SelftestStatus.PASSED,
                                                SelftestStatus.NO_RUN,
                                                SelftestStatus.SKIPPED]):
                     ret = 1
+        print("\n")
         return ret
-- 
2.51.0.618.g983fd99d29-goog