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Improve LOB testing
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‎test/fetchLobAsStrBuf.js

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/* Copyright (c) 2020, Oracle and/or its affiliates. All rights reserved. */
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/******************************************************************************
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*
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* You may not use the identified files except in compliance with the Apache
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* License, Version 2.0 (the "License.")
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*
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* You may obtain a copy of the License at
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* http://www.apache.org/licenses/LICENSE-2.0.
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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*
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*
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* The node-oracledb test suite uses 'mocha', 'should' and 'async'.
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* See LICENSE.md for relevant licenses.
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*
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* NAME
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* 245. fetchLobAsStrBuf.js
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*
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* DESCRIPTION
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* Testing CLOB binding as String with DML and Blob binding as Buffer with DML
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*
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*****************************************************************************/
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'use strict';
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var oracledb = require('oracledb');
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var should = require('should');
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var async = require('async');
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var dbConfig = require('./dbconfig.js');
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var random = require('./random.js');
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var assist = require('./dataTypeAssist.js');
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describe('245. fetchLobAsStrBuf.js', function() {
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var connection = null;
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var insertID = 1;
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var tableName = "fetchLobAsStrBuf_table";
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var fun_create_table = "BEGIN \n" +
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" DECLARE \n" +
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" e_table_missing EXCEPTION; \n" +
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" PRAGMA EXCEPTION_INIT(e_table_missing, -00942);\n" +
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" BEGIN \n" +
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" EXECUTE IMMEDIATE ('DROP TABLE " + tableName + " PURGE' ); \n" +
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" EXCEPTION \n" +
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" WHEN e_table_missing \n" +
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" THEN NULL; \n" +
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" END; \n" +
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" EXECUTE IMMEDIATE ( ' \n" +
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" CREATE TABLE " + tableName + " ( \n" +
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" id NUMBER, \n" +
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" clob_col clob, \n" +
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" blob_col blob \n" +
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" ) \n" +
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" '); \n" +
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"END; ";
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var drop_table = "DROP TABLE " + tableName + " PURGE";
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before(function(done) {
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oracledb.getConnection(dbConfig, function(err, conn) {
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should.not.exist(err);
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connection = conn;
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done();
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});
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});
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after(function(done) {
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connection.release(function(err) {
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should.not.exist(err);
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done();
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});
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});
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var executeSQL = function(sql, callback) {
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connection.execute(
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sql,
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function(err) {
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should.not.exist(err);
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return callback();
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}
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);
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};
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var insertIntoTable = function(id ,contentClob,contentBlob,callback) {
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if (contentClob == "EMPTY_CLOB" && contentBlob == "EMPTY_BLOB") {
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connection.execute( "insert INTO fetchLobAsStrBuf_table values(:id, EMPTY_CLOB(), EMPTY_BLOB())",
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[ id ],
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function(err, result) {
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should.not.exist(err);
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should.strictEqual(result.rowsAffected, 1);
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callback();
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});
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}
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else {
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var sql = "insert into fetchLobAsStrBuf_table (id, clob_col, blob_col) values(:id, :str, :buf)";
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var bindings = {
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id : { val : id },
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str : {val:contentClob, type:oracledb.STRING, dir:oracledb.BIND_IN},
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buf : {val:contentBlob, type:oracledb.BUFFER, dir:oracledb.BIND_IN}
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};
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connection.execute(sql , bindings ,
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function(err, result) {
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should.not.exist(err);
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should.strictEqual(result.rowsAffected, 1);
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callback();
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});
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}
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};
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var checkInsertResult = function(id, contentClob,specialStr,contentBlob,callback) {
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async.series([
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function(cb) {
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var sql = "select clob_col from fetchLobAsStrBuf_table where id = " +id;
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verifyClobValueWithString(sql, contentClob, specialStr, cb);
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},
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function(cb) {
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var sql = "select blob_col from fetchLobAsStrBuf_table where id = " +id;
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verifyBlobValueWithBuffer(sql ,contentBlob ,specialStr,cb);
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}
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], callback);
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};
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var verifyClobValueWithString = function(selectSql, originalString, specialStr, callback) {
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connection.execute(
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selectSql,
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function(err, result) {
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should.not.exist(err);
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var lob = result.rows[0][0];
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if(originalString == '' || originalString == undefined || originalString == null) {
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should.not.exist(lob);
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return callback();
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} else {
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should.exist(lob);
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// set the encoding so we get a 'string' not a 'buffer'
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lob.setEncoding('utf8');
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var clobData = '';
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lob.on('data', function(chunk) {
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clobData += chunk;
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});
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lob.on('error', function(err) {
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should.not.exist(err, "lob.on 'error' event.");
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});
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lob.on('end', function(err) {
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should.not.exist(err);
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if (originalString == "EMPTY_CLOB") {
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should.strictEqual(clobData, "");
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} else {
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var resultLength = clobData.length;
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var specStrLength = specialStr.length;
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should.strictEqual(resultLength, originalString.length);
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should.strictEqual(clobData.substring(0, specStrLength), specialStr);
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should.strictEqual(clobData.substring(resultLength - specStrLength, resultLength), specialStr);
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}
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return callback();
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});
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}
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}
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);
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};
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var verifyBlobValueWithBuffer = function(selectSql, originalBuffer, specialStr, callback) {
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connection.execute(
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selectSql,
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function(err, result) {
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should.not.exist(err);
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var lob = result.rows[0][0];
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if(originalBuffer == '' || originalBuffer == undefined) {
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should.not.exist(lob);
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return callback();
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} else {
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should.exist(lob);
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var blobData = Buffer.alloc(0);
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var totalLength = 0;
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lob.on('data', function(chunk) {
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totalLength = totalLength + chunk.length;
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blobData = Buffer.concat([blobData, chunk], totalLength);
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});
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lob.on('error', function(err) {
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should.not.exist(err, "lob.on 'error' event.");
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});
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lob.on('end', function() {
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if(originalBuffer == "EMPTY_BLOB") {
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var nullBuffer = Buffer.from('', "utf-8");
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should.strictEqual(assist.compare2Buffers(blobData, nullBuffer), true);
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} else {
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should.strictEqual(totalLength, originalBuffer.length);
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var specStrLength = specialStr.length;
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should.strictEqual(blobData.toString('utf8', 0, specStrLength), specialStr);
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should.strictEqual(blobData.toString('utf8', (totalLength - specStrLength), totalLength), specialStr);
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should.strictEqual(assist.compare2Buffers(blobData, originalBuffer), true);
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}
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return callback();
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});
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}
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}
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);
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};
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describe('245.1 CLOB,BLOB Insert', function() {
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before(function(done) {
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executeSQL(fun_create_table, done);
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});
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after(function(done) {
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executeSQL(drop_table, done);
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});
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it('245.1.1 Insert and fetch CLOB,BLOB with EMPTY_CLOB and EMPTY_BLOB', function(done) {
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var id = insertID++;
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var contentClob = "EMPTY_CLOB";
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var contentBlob = "EMPTY_BLOB";
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async.series([
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function(cb) {
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insertIntoTable(id, contentClob ,contentBlob, cb);
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},
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function(cb) {
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checkInsertResult(id, contentClob, null, contentBlob,cb);
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}
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], done);
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});
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it('245.1.2 Insert and fetch CLOB,BLOB with String and Buffer of length 32K', function(done) {
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var id = insertID++;
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var contentLength = 32768;
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var specialStr = "245.1.2";
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var contentClob = random.getRandomString(contentLength, specialStr);
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var contentBlob = Buffer.from(contentClob, "utf-8");
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async.series([
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function(cb) {
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insertIntoTable(id, contentClob,contentBlob,cb);
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},
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function(cb) {
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checkInsertResult(id, contentClob, specialStr,contentBlob, cb);
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}
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], done);
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});
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it('245.1.3 Insert and fetch CLOB,BLOB with String and Buffer of length (1MB + 1)', function(done) {
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var id = insertID++;
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var contentLength = 1048577;
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var specialStr = "245.1.2";
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var contentClob = random.getRandomString(contentLength, specialStr);
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var contentBlob = Buffer.from(contentClob, "utf-8");
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async.series([
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function(cb) {
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insertIntoTable(id, contentClob,contentBlob,cb);
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},
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function(cb) {
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checkInsertResult(id, contentClob, specialStr,contentBlob, cb);
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}
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], done);
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});
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});
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});

‎test/list.txt

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244.9.1 works with oracledb.fetchAsString
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- 244.9.2 doesn't work with outFormat: oracledb.DB_TYPE_JSON
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244.9.3 could work with fetchInfo oracledb.STRING
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245. fetchLobAsStrBuf.js
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245.1 CLOB,BLOB Insert
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245.1.1 Insert and fetch CLOB,BLOB with EMPTY_CLOB and EMPTY_BLOB
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245.1.2 Insert and fetch CLOB,BLOB with String and Buffer of length 32K
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245.1.3 Insert and fetch CLOB,BLOB with String and Buffer of length (1MB + 1)
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‎test/opts/.mocharc.yaml

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- test/plsqlBindCursorsIN.js
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- test/errorOffset.js
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- test/dbType04.js
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- test/dbObject18.js
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- test/dbObject19.js
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- test/dataTypeJson.js
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- test/fetchLobAsStrBuf.js

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