gecko/xpcom/tests/TestHarness.h

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/*
 * Test harness for XPCOM objects, providing a scoped XPCOM initializer,
 * nsCOMPtr, nsRefPtr, do_CreateInstance, do_GetService, ns(Auto|C|)String,
 * and stdio.h/stdlib.h.
 */

#ifndef TestHarness_h__
#define TestHarness_h__

#include "nsComponentManagerUtils.h"
#include "nsServiceManagerUtils.h"
#include "nsCOMPtr.h"
#include "nsAutoPtr.h"
#include "nsStringGlue.h"
#include <stdio.h>
#include <stdlib.h>
#include <stdarg.h>

static PRBool gFailCount;

/**
 * Prints the given failure message and arguments using printf, prepending
 * "TEST-UNEXPECTED-FAIL " for the benefit of the test harness and
 * appending "\n" to eliminate having to type it at each call site.
 */
void fail(const char* msg, ...)
{
  va_list ap;

  printf("TEST-UNEXPECTED-FAIL | ");

  va_start(ap, msg);
  vprintf(msg, ap);
  va_end(ap);

  putchar('\n');
  ++gFailCount;
}

/**
 * Prints the given string prepending "TEST-PASS | " for the benefit of
 * the test harness and with "\n" at the end, to be used at the end of a
 * successful test function.
 */
void passed(const char* test)
{
  printf("TEST-PASS | %s\n", test);
}


class ScopedXPCOM
{
  public:
    ScopedXPCOM(const char* testName,
                nsIDirectoryServiceProvider *dirSvcProvider = NULL)
    {
      mTestName = testName;
      printf("Running %s tests...\n", mTestName);

      nsresult rv = NS_InitXPCOM2(&mServMgr, NULL, dirSvcProvider);
      if (NS_FAILED(rv))
      {
        fail("NS_InitXPCOM2 returned failure code 0x%x", rv);
        mServMgr = NULL;
      }
    }

    ~ScopedXPCOM()
    {
      if (mServMgr)
      {
        NS_RELEASE(mServMgr);
        nsresult rv = NS_ShutdownXPCOM(NULL);
        if (NS_FAILED(rv))
        {
          fail("XPCOM shutdown failed with code 0x%x", rv);
          exit(1);
        }
      }

      printf("Finished running %s tests.\n", mTestName);
    }

    PRBool failed()
    {
      return mServMgr == NULL;
    }

  private:
    const char* mTestName;
    nsIServiceManager* mServMgr;
};

#endif  // TestHarness_h__