[test] Use glob expansion in test selection

The run_test.py tool test selection only expands asterisks at the end of
the test name. This CL introduces glob expansion in test selection
(asterisks are expanded anywhere in the path).

This is useful when tests that belong to the same area have different
prefixes. For example wasm cctests have two different prefixes:
'cctest/test-run-wasm*' and 'cctest/test-wasm*'. With this CL it is
possible to specify the selector 'cctest/*wasm*' to run them all.

R=machenbach@chromium.org

Change-Id: I1c7cc5136b21e71f3eaf69fb98d5dfd77d336e2a
Reviewed-on: https://chromium-review.googlesource.com/609000Reviewed-by: Michael Achenbach <machenbach@chromium.org>
Commit-Queue: Enrico Bacis <enricobacis@google.com>
Cr-Commit-Position: refs/heads/master@{#47274}

tools/testrunner/local/testsuite.py

@@ -26,6 +26,7 @@
 # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
 
+import fnmatch
 import imp
 import os
 
@@ -237,13 +238,12 @@ class TestSuite(object):
   def FilterTestCasesByArgs(self, args):
     """Filter test cases based on command-line arguments.
 
-    An argument with an asterisk in the end will match all test cases
-    that have the argument as a prefix. Without asterisk, only exact matches
+    args can be a glob: asterisks in any position of the argument
+    represent zero or more characters. Without asterisks, only exact matches
     will be used with the exeption of the test-suite name as argument.
     """
     filtered = []
     globs = []
-    exact_matches = []
     for a in args:
       argpath = a.split('/')
       if argpath[0] != self.name:
@@ -251,18 +251,11 @@ class TestSuite(object):
       if len(argpath) == 1 or (len(argpath) == 2 and argpath[1] == '*'):
         return  # Don't filter, run all tests in this suite.
       path = '/'.join(argpath[1:])
-      if path[-1] == '*':
-        path = path[:-1]
-        globs.append(path)
-      else:
-        exact_matches.append(path)
+      globs.append(path)
+
     for t in self.tests:
-      for a in globs:
-        if t.path.startswith(a):
-          filtered.append(t)
-          break
-      for a in exact_matches:
-        if t.path == a:
+      for g in globs:
+        if fnmatch.fnmatch(t.path, g):
           filtered.append(t)
           break
     self.tests = filtered