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/*
 * 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 "CrashHandler.h"
#include "OverwriteLine.h"
#include "Resources.h"
#include "SkAtomics.h"
#include "SkCommonFlags.h"
#include "SkGraphics.h"
#include "SkOSFile.h"
#include "SkRunnable.h"
#include "SkTArray.h"
#include "SkTaskGroup.h"
#include "SkTemplates.h"
#include "SkTime.h"
#include "Test.h"

#if SK_SUPPORT_GPU
#include "GrContext.h"
#include "GrContextFactory.h"
#endif

using namespace skiatest;

DEFINE_bool2(extendedTest, x, false, "run extended tests for pathOps.");

// need to explicitly declare this, or we get some weird infinite loop llist
template TestRegistry* TestRegistry::gHead;
void (*gVerboseFinalize)() = nullptr;

// The threads report back to this object when they are done.
class Status {
public:
    explicit Status(int total)
        : fDone(0), fTestCount(0), fFailCount(0), fTotal(total) {}
    // Threadsafe.
    void endTest(const char* testName,
                 bool success,
                 SkMSec elapsed,
                 int testCount) {
        const int done = 1 + sk_atomic_inc(&fDone);
        for (int i = 0; i < testCount; ++i) {
            sk_atomic_inc(&fTestCount);
        }
        if (!success) {
            SkDebugf("\n---- %s FAILED", testName);
        }

        SkString prefix(kSkOverwriteLine);
        SkString time;
        if (FLAGS_verbose) {
            prefix.printf("\n");
            time.printf("%5dms ", elapsed);
        }
        SkDebugf("%s[%3d/%3d] %s%s", prefix.c_str(), done, fTotal, time.c_str(),
                 testName);
    }

    void reportFailure() { sk_atomic_inc(&fFailCount); }

    int32_t testCount() { return fTestCount; }
    int32_t failCount() { return fFailCount; }

private:
    int32_t fDone;  // atomic
    int32_t fTestCount;  // atomic
    int32_t fFailCount;  // atomic
    const int fTotal;
};

// Deletes self when run.
class SkTestRunnable : public SkRunnable {
public:
    SkTestRunnable(const Test& test,
                   Status* status,
                   GrContextFactory* grContextFactory = nullptr)
        : fTest(test), fStatus(status), fGrContextFactory(grContextFactory) {}

  virtual void run() {
      struct TestReporter : public skiatest::Reporter {
      public:
          TestReporter() : fError(false), fTestCount(0) {}
          void bumpTestCount() override { ++fTestCount; }
          bool allowExtendedTest() const override {
              return FLAGS_extendedTest;
          }
          bool verbose() const override { return FLAGS_veryVerbose; }
          void reportFailed(const skiatest::Failure& failure) override {
              SkDebugf("\nFAILED: %s", failure.toString().c_str());
              fError = true;
          }
          bool fError;
          int fTestCount;
      } reporter;

      const SkMSec start = SkTime::GetMSecs();
      fTest.proc(&reporter, fGrContextFactory);
      SkMSec elapsed = SkTime::GetMSecs() - start;
      if (reporter.fError) {
          fStatus->reportFailure();
      }
      fStatus->endTest(fTest.name, !reporter.fError, elapsed,
                       reporter.fTestCount);
      delete this;
  }

private:
    Test fTest;
    Status* fStatus;
    GrContextFactory* fGrContextFactory;
};

static bool should_run(const char* testName, bool isGPUTest) {
    if (SkCommandLineFlags::ShouldSkip(FLAGS_match, testName)) {
        return false;
    }
    if (!FLAGS_cpu && !isGPUTest) {
        return false;
    }
    if (!FLAGS_gpu && isGPUTest) {
        return false;
    }
    return true;
}

int test_main();
int test_main() {
    SetupCrashHandler();

    SkAutoGraphics ag;

    {
        SkString header("Skia UnitTests:");
        if (!FLAGS_match.isEmpty()) {
            header.appendf(" --match");
            for (int index = 0; index < FLAGS_match.count(); ++index) {
                header.appendf(" %s", FLAGS_match[index]);
            }
        }
        SkString tmpDir = skiatest::GetTmpDir();
        if (!tmpDir.isEmpty()) {
            header.appendf(" --tmpDir %s", tmpDir.c_str());
        }
        SkString resourcePath = GetResourcePath();
        if (!resourcePath.isEmpty()) {
            header.appendf(" --resourcePath %s", resourcePath.c_str());
        }
#ifdef SK_DEBUG
        header.append(" SK_DEBUG");
#else
        header.append(" SK_RELEASE");
#endif
        if (FLAGS_veryVerbose) {
            header.appendf("\n");
        }
        SkDebugf("%s", header.c_str());
    }


    // Count tests first.
    int total = 0;
    int toRun = 0;

    for (const TestRegistry* iter = TestRegistry::Head(); iter;
         iter = iter->next()) {
        const Test& test = iter->factory();
        if (should_run(test.name, test.needsGpu)) {
            toRun++;
        }
        total++;
    }

    // Now run them.
    int skipCount = 0;

    SkTaskGroup::Enabler enabled(FLAGS_threads);
    SkTaskGroup cpuTests;
    SkTArray<const Test*> gpuTests;

    Status status(toRun);
    for (const TestRegistry* iter = TestRegistry::Head(); iter;
         iter = iter->next()) {
        const Test& test = iter->factory();
        if (!should_run(test.name, test.needsGpu)) {
            ++skipCount;
        } else if (test.needsGpu) {
            gpuTests.push_back(&test);
        } else {
            cpuTests.add(new SkTestRunnable(test, &status));
        }
    }

    GrContextFactory* grContextFactoryPtr = nullptr;
#if SK_SUPPORT_GPU
    // Give GPU tests a context factory if that makes sense on this machine.
    GrContextFactory grContextFactory;
    grContextFactoryPtr = &grContextFactory;

#endif

    // Run GPU tests on this thread.
    for (int i = 0; i < gpuTests.count(); i++) {
        (new SkTestRunnable(*gpuTests[i], &status, grContextFactoryPtr))->run();
    }

    // Block until threaded tests finish.
    cpuTests.wait();

    if (FLAGS_verbose) {
        SkDebugf(
                "\nFinished %d tests, %d failures, %d skipped. "
                "(%d internal tests)",
                toRun, status.failCount(), skipCount, status.testCount());
        if (gVerboseFinalize) {
            (*gVerboseFinalize)();
        }
    }

    SkDebugf("\n");
    return (status.failCount() == 0) ? 0 : 1;
}

#if !defined(SK_BUILD_FOR_IOS)
int main(int argc, char** argv) {
    SkCommandLineFlags::Parse(argc, argv);
    return test_main();
}
#endif