make tests output spin on the same line by default

tests/skia_test.cpp

Index: tests/skia_test.cpp
diff --git a/tests/skia_test.cpp b/tests/skia_test.cpp
index a1d4bf799bfcdeb31bcb0d305c3b31252a8a3038..26a7701a8def4c4e11ec81ff628bd858351cbf6a 100644
--- a/tests/skia_test.cpp
+++ b/tests/skia_test.cpp
@@ -13,6 +13,7 @@
 #include "SkThreadPool.h"
 #include "SkTime.h"
 #include "Test.h"
+#include "OverwriteLine.h"
 
 #if SK_SUPPORT_GPU
 #include "GrContext.h"
@@ -20,121 +21,79 @@
 
 using namespace skiatest;
 
+DEFINE_string2(match, m, NULL, "[~][^]substring[$] [...] of test name to run.\n" \
+                               "Multiple matches may be separated by spaces.\n" \
+                               "~ causes a matching test to always be skipped\n" \
+                               "^ requires the start of the test to match\n" \
+                               "$ requires the end of the test to match\n" \
+                               "^ and $ requires an exact match\n" \
+                               "If a test does not match any list entry,\n" \
+                               "it is skipped unless some list entry starts with ~");
+DEFINE_string2(tmpDir, t, NULL, "tmp directory for tests to use.");
+DEFINE_string2(resourcePath, i, "resources", "directory for test resources.");
+DEFINE_bool2(extendedTest, x, false, "run extended tests for pathOps.");
+DEFINE_bool2(single, z, false, "run tests on a single thread internally.");
+DEFINE_bool2(verbose, v, false, "enable verbose output.");
+DEFINE_int32(threads, SkThreadPool::kThreadPerCore,
+             "Run threadsafe tests on a threadpool with this many threads.");
+
 // need to explicitly declare this, or we get some weird infinite loop llist
 template TestRegistry* TestRegistry::gHead;
 
 class Iter {
 public:
-    Iter(Reporter* r) : fReporter(r) {
-        r->ref();
-        this->reset();
-    }
-
-    void reset() {
-        fReg = TestRegistry::Head();
-    }
-
-    ~Iter() {
-        fReporter->unref();
-    }
+    Iter() { this->reset(); }
+    void reset() { fReg = TestRegistry::Head(); }
 
-    Test* next() {
+    Test* next(Reporter* r) {
         if (fReg) {
             TestRegistry::Factory fact = fReg->factory();
             fReg = fReg->next();
             Test* test = fact(NULL);
-            test->setReporter(fReporter);
+            test->setReporter(r);
             return test;
         }
         return NULL;
     }
 
 private:
-    Reporter* fReporter;
     const TestRegistry* fReg;
 };
 
 class DebugfReporter : public Reporter {
 public:
-    DebugfReporter(bool allowExtendedTest, bool allowThreaded, bool verbose)
-        : fNextIndex(0)
-        , fPending(0)
-        , fTotal(0)
-        , fAllowExtendedTest(allowExtendedTest)
-        , fAllowThreaded(allowThreaded)
-        , fVerbose(verbose) {
-    }
+    explicit DebugfReporter(int total) : fDone(0), fTotal(total) {}
 
-    void setTotal(int total) {
-        fTotal = total;
-    }
-
-    virtual bool allowExtendedTest() const SK_OVERRIDE {
-        return fAllowExtendedTest;
-    }
-
-    virtual bool allowThreaded() const SK_OVERRIDE {
-        return fAllowThreaded;
-    }
-
-    virtual bool verbose() const SK_OVERRIDE {
-        return fVerbose;
-    }
+    virtual bool allowExtendedTest() const SK_OVERRIDE { return FLAGS_extendedTest; }
+    virtual bool allowThreaded()     const SK_OVERRIDE { return !FLAGS_single; }
+    virtual bool verbose()           const SK_OVERRIDE { return FLAGS_verbose; }
 
 protected:
-    virtual void onStart(Test* test) {
-        SkAutoMutexAcquire lock(fStartEndMutex);
-        fNextIndex++;
-        fPending++;
-        SkDebugf("[%3d/%3d] (%d) %s\n", fNextIndex, fTotal, fPending, test->getName());
+    virtual void onReportFailed(const SkString& desc) SK_OVERRIDE {
+        SkDebugf("\nFAILED: %s", desc.c_str());
     }
 
-    virtual void onReportFailed(const SkString& desc) {
-        SkDebugf("\tFAILED: %s\n", desc.c_str());
-    }
+    virtual void onEnd(Test* test) SK_OVERRIDE {
+        const int done = 1 + sk_atomic_inc(&fDone);
 
-    virtual void onEnd(Test* test) {
-        SkAutoMutexAcquire lock(fStartEndMutex);
         if (!test->passed()) {
-            SkDebugf("---- %s FAILED\n", test->getName());
+            SkDebugf("\n---- %s FAILED", test->getName());
         }
 
-        fPending--;
-        if (fNextIndex == fTotal) {
-            // Just waiting on straggler tests.  Shame them by printing their name and runtime.
-            SkDebugf("          (%d) %5.1fs %s\n",
-                     fPending, test->elapsedMs() / 1e3, test->getName());
+        SkString prefix(kSkOverwriteLine);
+        SkString time;
+        if (FLAGS_verbose) {
+            prefix.printf("\n");
+            time.printf("%5dms ", test->elapsedMs());
         }
+        SkDebugf("%s[%3d/%3d] %s%s", prefix.c_str(), done, fTotal, time.c_str(), test->getName());
     }
 
 private:
-    SkMutex fStartEndMutex;  // Guards fNextIndex and fPending.
-    int32_t fNextIndex;
-    int32_t fPending;
-
-    // Once the tests get going, these are logically const.
-    int fTotal;
-    bool fAllowExtendedTest;
-    bool fAllowThreaded;
-    bool fVerbose;
+    int32_t fDone;  // atomic
+    const int fTotal;
 };
 
-DEFINE_string2(match, m, NULL, "[~][^]substring[$] [...] of test name to run.\n" \
-                               "Multiple matches may be separated by spaces.\n" \
-                               "~ causes a matching test to always be skipped\n" \
-                               "^ requires the start of the test to match\n" \
-                               "$ requires the end of the test to match\n" \
-                               "^ and $ requires an exact match\n" \
-                               "If a test does not match any list entry,\n" \
-                               "it is skipped unless some list entry starts with ~");
-DEFINE_string2(tmpDir, t, NULL, "tmp directory for tests to use.");
-DEFINE_string2(resourcePath, i, "resources", "directory for test resources.");
-DEFINE_bool2(extendedTest, x, false, "run extended tests for pathOps.");
-DEFINE_bool2(single, z, false, "run tests on a single thread internally.");
-DEFINE_bool2(verbose, v, false, "enable verbose output.");
-DEFINE_int32(threads, SkThreadPool::kThreadPerCore,
-             "Run threadsafe tests on a threadpool with this many threads.");
-
 SkString Test::GetTmpDir() {
     const char* tmpDir = FLAGS_tmpDir.isEmpty() ? NULL : FLAGS_tmpDir[0];
     return SkString(tmpDir);
@@ -197,18 +156,17 @@ int tool_main(int argc, char** argv) {
         header.append(" SK_RELEASE");
 #endif
         header.appendf(" skia_arch_width=%d", (int)sizeof(void*) * 8);
-        SkDebugf("%s\n", header.c_str());
+        SkDebugf(header.c_str());
     }
 
-    DebugfReporter reporter(FLAGS_extendedTest, !FLAGS_single, FLAGS_verbose);
-    Iter iter(&reporter);
 
     // Count tests first.
     int total = 0;
     int toRun = 0;
     Test* test;
 
-    while ((test = iter.next()) != NULL) {
+    Iter iter;
+    while ((test = iter.next(NULL/*reporter not needed*/)) != NULL) {
         SkAutoTDelete<Test> owned(test);
 
         if(!SkCommandLineFlags::ShouldSkip(FLAGS_match, test->getName())) {
@@ -216,7 +174,6 @@ int tool_main(int argc, char** argv) {
         }
         total++;
     }
-    reporter.setTotal(toRun);
 
     // Now run them.
     iter.reset();
@@ -225,8 +182,10 @@ int tool_main(int argc, char** argv) {
 
     SkThreadPool threadpool(FLAGS_threads);
     SkTArray<Test*> unsafeTests;  // Always passes ownership to an SkTestRunnable
+
+    DebugfReporter reporter(toRun);
     for (int i = 0; i < total; i++) {
-        SkAutoTDelete<Test> test(iter.next());
+        SkAutoTDelete<Test> test(iter.next(&reporter));
         if (SkCommandLineFlags::ShouldSkip(FLAGS_match, test->getName())) {
             ++skipCount;
         } else if (!test->isThreadsafe()) {
@@ -244,15 +203,14 @@ int tool_main(int argc, char** argv) {
     // Block until threaded tests finish.
     threadpool.wait();
 
-    SkDebugf("Finished %d tests, %d failures, %d skipped.\n",
-             toRun, failCount, skipCount);
-    const int testCount = reporter.countTests();
-    if (FLAGS_verbose && testCount > 0) {
-        SkDebugf("Ran %d Internal tests.\n", testCount);
+    if (FLAGS_verbose) {
+        SkDebugf("\nFinished %d tests, %d failures, %d skipped. (%d internal tests)",
+                 toRun, failCount, skipCount, reporter.countTests());
     }
     SkGraphics::Term();
     GpuTest::DestroyContexts();
 
+    SkDebugf("\n");
     return (failCount == 0) ? 0 : 1;
 }