node-oracledb/test/writableProperties1.js

/* Copyright (c) 2016, 2018, Oracle and/or its affiliates. All rights reserved. */

/******************************************************************************
 *
 * You may not use the identified files except in compliance with the Apache
 * License, Version 2.0 (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.
 **
 * NAME
 *   66. writableProperties1.js
 *
 * DESCRIPTION
 *   Testing writable properties.
 *
 *****************************************************************************/
'use strict';

var oracledb = require('oracledb');
var should   = require('should');
var dbConfig = require('./dbconfig.js');

describe('66. writableProperties1.js', function() {

  it('66.1 allows overwriting of public methods on pool instances', function(done) {
    oracledb.createPool(
      {
        user              : dbConfig.user,
        password          : dbConfig.password,
        connectString     : dbConfig.connectString,
        poolMin           : 0,
        poolMax           : 1,
        poolIncrement     : 1
      },
      function(err, pool){
        var keys;
        var keysIdx;
        var originalFunction;

        should.not.exist(err);

        keys = Object.keys(pool);

        for (keysIdx = 0; keysIdx < keys.length; keysIdx += 1) {
          if (typeof pool[keys[keysIdx]] === 'function') {
            try {
              originalFunction = pool[keys[keysIdx]];

              pool[keys[keysIdx]] = function() {};

              pool[keys[keysIdx]] = originalFunction;
            } catch (err) {
              should.not.exist(err);
            }
          }
        }

        pool.terminate(function(err) {
          should.not.exist(err);

          done();
        });
      }
    );
  });

  it('66.2 allows overwriting of public methods on connection instances', function(done) {

    oracledb.getConnection(dbConfig, function(err, conn) {
      var keys;
      var keysIdx;
      var originalFunction;

      should.not.exist(err);

      keys = Object.keys(conn);

      for (keysIdx = 0; keysIdx < keys.length; keysIdx += 1) {
        if (typeof conn[keys[keysIdx]] === 'function') {
          try {
            originalFunction = conn[keys[keysIdx]];

            conn[keys[keysIdx]] = function() {};

            conn[keys[keysIdx]] = originalFunction;
          } catch (err) {
            should.not.exist(err);
          }
        }
      }

      conn.release(function(err) {
        should.not.exist(err);

        done();
      });
    });
  });

  it('66.3 allows overwriting of public methods on resultset instances', function(done) {

    oracledb.getConnection(dbConfig, function(err, conn) {
      should.not.exist(err);

      conn.execute(
        'select 1 from dual union select 2 from dual',
        [], // no binds
        {
          resultSet: true
        },
        function(err, result) {
          var keys;
          var keysIdx;
          var originalFunction;

          should.not.exist(err);

          keys = Object.keys(result.resultSet);

          for (keysIdx = 0; keysIdx < keys.length; keysIdx += 1) {
            if (typeof result.resultSet[keys[keysIdx]] === 'function') {
              try {
                originalFunction = result.resultSet[keys[keysIdx]];

                result.resultSet[keys[keysIdx]] = function() {};

                result.resultSet[keys[keysIdx]] = originalFunction;
              } catch (err) {
                should.not.exist(err);
              }
            }
          }

          result.resultSet.close(function(err) {
            should.not.exist(err);

            conn.release(function(err) {
              should.not.exist(err);

              done();
            });
          });
        }
      );
    });
  });

  it('66.4 allows overwriting of public methods on lob instances', function(done) {

    oracledb.getConnection(dbConfig, function(err, conn) {
      should.not.exist(err);

      conn.execute(
        'select to_clob(dummy) from dual',
        function(err, result) {
          var keys;
          var keysIdx;
          var originalFunction;
          var lob;

          should.not.exist(err);

          lob = result.rows[0][0];

          keys = Object.keys(lob);

          for (keysIdx = 0; keysIdx < keys.length; keysIdx += 1) {
            if (typeof lob[keys[keysIdx]] === 'function') {
              try {
                originalFunction = lob[keys[keysIdx]];

                lob[keys[keysIdx]] = function() {};

                lob[keys[keysIdx]] = originalFunction;
              } catch (err) {
                should.not.exist(err);
              }
            }
          }

          lob.on("close", function(err) {
            should.not.exist(err);

            conn.release(function(err) {
              should.not.exist(err);

              done();
            });
          }); // lob close event

          lob.on("error", function(err) {
            should.not.exist(err, "lob.on 'error' event.");
          });

          lob.close(function(err) {
            should.not.exist(err);
          });

        }
      );
    });
  }); // 66.4

  it('66.5 allows overwriting of public methods on oracledb instances', function(done) {
    var keys = Object.keys(oracledb);
    for (var keysIdx = 0; keysIdx < keys.length; keysIdx += 1) {
      if (typeof oracledb[keys[keysIdx]] === 'function') {
        try {
          var originalFunction = oracledb[keys[keysIdx]];
          oracledb[keys[keysIdx]] = function() {};
          oracledb[keys[keysIdx]] = originalFunction;
        } catch (err) {
          should.not.exist(err);
        }
      }
    }
    done();
  }); // 66.5

});