Test Driver: Tweak interval of test reporting

Rather than just display every 100 tests, work out how many to display
based on the total number of tests. This improves the experience when
running a small number of tests.

For [0..100] - Report every test
    [100..1000] - Report every 10 tests
    [1000..10000] - Report every 100 tests
    and so on..

1 files changed, 12 insertions, 5 deletions

diff --git a/testsuite/driver/testlib.py b/testsuite/driver/testlib.py
index 9fc6b6d859..c2838ae5bf 100644
--- a/testsuite/driver/testlib.py
+++ b/testsuite/driver/testlib.py
@@ -13,7 +13,7 @@ import datetime
 import copy
 import glob
 import sys
-from math import ceil, trunc
+from math import ceil, trunc, floor, log
 from pathlib import Path, PurePath
 import collections
 import subprocess
@@ -1079,13 +1079,20 @@ def do_test(name: TestName,
     opts = getTestOpts()
 
     full_name = name + '(' + way + ')'
-
-    progress_args = [ full_name, t.total_tests, len(allTestNames),
+    test_n = len(allTestNames)
+    progress_args = [ full_name, t.total_tests, test_n,
         [len(t.unexpected_passes),
          len(t.unexpected_failures),
          len(t.framework_failures)]]
-    if t.total_tests % 100 == 0: if_verbose(2, "=====> {1} of {2} {3}".format(*progress_args))
-    if_verbose(3, "=====> {0} {1} of {2} {3}".format(*progress_args))
+    # For n = [0..100] - Report every test
+    #     n = [100..1000] - Report every 10 tests
+    #     n = [1000...10000] - report every 100 tests
+    #     and so on...
+    report_every = 10 ** max(0, floor(log(test_n, 10)) - 1)
+    if t.total_tests % report_every == 0 and config.verbose <= 2:
+        if_verbose(2, "=====> {1} of {2} {3}".format(*progress_args))
+    else:
+        if_verbose(3, "=====> {0} {1} of {2} {3}".format(*progress_args))
 
     # Update terminal title
     # useful progress indicator even when make test VERBOSE=1