TestBox.h

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#if ! defined(TS_TEST_BOX_HEADER)
#define TS_TEST_BOX_HEADER

/** @file

    Regression testing support class.

    @section license License

    Licensed to the Apache Software Foundation (ASF) under one
    or more contributor license agreements.  See the NOTICE file
    distributed with this work for additional information
    regarding copyright ownership.  The ASF licenses this file
    to you under the Apache License, Version 2.0 (the
    "License"); you may not use this file except in compliance
    with the License.  You may obtain a copy of the License at

    http://www.apache.org/licenses/LICENSE-2.0

    Unless required by applicable law or agreed to in writing, software
    distributed under the License is distributed on an "AS IS" BASIS,
    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    See the License for the specific language governing permissions and
    limitations under the License.
*/

# include <ts/Regression.h>

namespace {
  /** Class to make handling regression tests easier.
      This holds the important regression test values so they don't have to
      be passed repeated.
  */
  struct TestBox {
    typedef TestBox self; ///< Self reference type.
    RegressionTest* _test; ///< The test object.
    int* _status; ///< Current status pointer.

    /// Construct from @a test object and @a status pointer.
    TestBox(RegressionTest* test, int* status) : _test(test), _status(status) {}

    /// Construct from @a test object, @a status pointer and @a regression status.
    TestBox(RegressionTest* test, int* status, int rstatus) : _test(test), _status(status) {
      *this = rstatus;
    }

    /// Check the result and print a message on failure.
    bool check(bool result, char const* fmt, ...) TS_PRINTFLIKE(3, 4);

    /// Directly assign status.
    self& operator = (int status) { *_status = status; return *this; }
  };

  bool TestBox::check(bool result, char const* fmt, ...) {
    if (!result) {
      static size_t const N = 1<<16;
      char buffer[N]; // just stack, go big.
      va_list ap;
      va_start(ap, fmt);
      vsnprintf(buffer, N, fmt, ap);
      va_end(ap);
      rprintf(_test, "%s\n", buffer);
      *_status = REGRESSION_TEST_FAILED;
    }
    return result;
  }
}
#endif // TS_TEST_BOX_HEADER