Allow unit tests to include or exclude test sets.

tests/skia_test.cpp

 /*
  * Copyright 2011 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "SkCommandLineFlags.h"
 #include "SkGraphics.h"
 #include "SkOSFile.h"
@@ skipping 150 matching lines @@
           sk_atomic_inc(fFailCount);
       }
       SkDELETE(this);
   }
 
 private:
     SkAutoTDelete<Test> fTest;
     int32_t* fFailCount;
 };
 
+/* Takes a list of the form [~][^]match[$]
+   ~ causes a matching test to always be skipped
+   ^ requires the start of the test to match
+   $ requires the end of the test to match
+   ^ and $ requires an exact match
+   If a test does not match any list entry, it is skipped unless some list entry starts with ~
+ */
 static bool shouldSkip(const char* testName) {
-    return !FLAGS_match.isEmpty() && !strstr(testName, FLAGS_match[0]);
+    int count = FLAGS_match.count();
+    size_t testLen = strlen(testName);
+    bool anyExclude = false;
+    for (int index = 0; index < count; ++index) {
+        const char* matchName = FLAGS_match[index];
+        size_t matchLen = strlen(matchName);
+        bool matchExclude, matchStart, matchEnd;
+        if ((matchExclude = matchName[0] == '~')) {
+            anyExclude = true;
+            matchName++;
+            matchLen--;
+        }
+        if ((matchStart = matchName[0] == '^')) {
+            matchName++;
+            matchLen--;
+        }
+        if ((matchEnd = matchName[matchLen - 1] == '$')) {
+            matchLen--;
+        }
+        if (matchStart ? (!matchEnd || matchLen == testLen)
+                && strncmp(testName, matchName, matchLen) == 0
+                : matchEnd ? matchLen <= testLen
+                && strncmp(testName + testLen - matchLen, matchName, matchLen) == 0
+                : strstr(testName, matchName) != 0) {
+            return matchExclude;
+        }
+    }
+    return !anyExclude;
 }
 
 int tool_main(int argc, char** argv);
 int tool_main(int argc, char** argv) {
     SkCommandLineFlags::SetUsage("");
     SkCommandLineFlags::Parse(argc, argv);
 
     if (!FLAGS_tmpDir.isEmpty()) {
         make_canonical_dir_path(FLAGS_tmpDir[0], &gTmpDir);
     }
     if (!FLAGS_resourcePath.isEmpty()) {
         make_canonical_dir_path(FLAGS_resourcePath[0], &gResourcePath);
     }
 
 #if SK_ENABLE_INST_COUNT
     gPrintInstCount = true;
 #endif
 
     SkGraphics::Init();
 
     {
         SkString header("Skia UnitTests:");
         if (!FLAGS_match.isEmpty()) {
-            header.appendf(" --match %s", FLAGS_match[0]);
+            header.appendf(" --match");
+            for (int index = 0; index < FLAGS_match.count(); ++index) {
+                header.appendf(" %s", FLAGS_match[index]);
+            }
         }
         if (!gTmpDir.isEmpty()) {
             header.appendf(" --tmpDir %s", gTmpDir.c_str());
         }
         if (!gResourcePath.isEmpty()) {
             header.appendf(" --resourcePath %s", gResourcePath.c_str());
         }
 #ifdef SK_DEBUG
         header.append(" SK_DEBUG");
 #else
@@ skipping 69 matching lines @@
     GpuTest::DestroyContexts();
 
     return (failCount == 0) ? 0 : 1;
 }
 
 #if !defined(SK_BUILD_FOR_IOS) && !defined(SK_BUILD_FOR_NACL)
 int main(int argc, char * const argv[]) {
     return tool_main(argc, (char**) argv);
 }
 #endif