Update terminal title while running test-suite

Useful progress indicator even when `make test VERBOSE=1`,
and when you do something else, but have terminal title visible.

3 files changed, 30 insertions, 4 deletions

diff --git a/testsuite/driver/runtests.py b/testsuite/driver/runtests.py
index b439abde0c..107bd77696 100644
--- a/testsuite/driver/runtests.py
+++ b/testsuite/driver/runtests.py
@@ -189,6 +189,23 @@ else:
                 print('WARNING: No UTF8 locale found.')
                 print('You may get some spurious test failures.')
 
+# https://stackoverflow.com/a/22254892/1308058
+def supports_colors():
+    """
+    Returns True if the running system's terminal supports color, and False
+    otherwise.
+    """
+    plat = sys.platform
+    supported_platform = plat != 'Pocket PC' and (plat != 'win32' or
+                                                  'ANSICON' in os.environ)
+    # isatty is not always implemented, #6223.
+    is_a_tty = hasattr(sys.stdout, 'isatty') and sys.stdout.isatty()
+    if not supported_platform or not is_a_tty:
+        return False
+    return True
+
+config.supports_colors = supports_colors()
+
 # This has to come after arg parsing as the args can change the compiler
 get_compiler_info()
 
@@ -412,7 +429,7 @@ else:
         print(Perf.allow_changes_string(t.metrics))
         print('-' * 25)
 
-    summary(t, sys.stdout, config.no_print_summary, True)
+    summary(t, sys.stdout, config.no_print_summary, config.supports_colors)
 
     # Write perf stats if any exist or if a metrics file is specified.
     stats = [stat for (_, stat) in t.metrics]
diff --git a/testsuite/driver/testglobals.py b/testsuite/driver/testglobals.py
index 054fd713d0..b28477c769 100644
--- a/testsuite/driver/testglobals.py
+++ b/testsuite/driver/testglobals.py
@@ -136,6 +136,9 @@ class TestConfig:
         # The test environment.
         self.test_env = 'local'
 
+        # terminal supports colors
+        self.supports_colors = False
+
 global config
 config = TestConfig()
 
diff --git a/testsuite/driver/testlib.py b/testsuite/driver/testlib.py
index 95274f30e5..dc8b1b85f1 100644
--- a/testsuite/driver/testlib.py
+++ b/testsuite/driver/testlib.py
@@ -891,11 +891,17 @@ def do_test(name, way, func, args, files):
 
     full_name = name + '(' + way + ')'
 
-    if_verbose(2, "=====> {0} {1} of {2} {3}".format(
-        full_name, t.total_tests, len(allTestNames),
+    progress_args = [ full_name, t.total_tests, len(allTestNames),
         [len(t.unexpected_passes),
          len(t.unexpected_failures),
-         len(t.framework_failures)]))
+         len(t.framework_failures)]]
+    if_verbose(2, "=====> {0} {1} of {2} {3}".format(*progress_args))
+
+    # Update terminal title
+    # useful progress indicator even when make test VERBOSE=1
+    if config.supports_colors:
+        print("\033]0;{0} {1} of {2} {3}\007".format(*progress_args), end="")
+        sys.stdout.flush()
 
     # Clean up prior to the test, so that we can't spuriously conclude
     # that it passed on the basis of old run outputs.