//
// OdbcDataReaderTest.cs - NUnit Test Cases for testing the
// OdbcDataReader class
//
// Author: 
//      Sureshkumar T (TSureshkumar@novell.com)
// 
// Copyright (c) 2004 Novell Inc., and the individuals listed
// on the ChangeLog entries.
//
// Permission is hereby granted, free of charge, to any person obtaining
// a copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to
// permit persons to whom the Software is furnished to do so, subject to
// the following conditions:
//
// The above copyright notice and this permission notice shall be
// included in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
//


using System;
using System.Data;
using System.Data.Odbc;

using NUnit.Framework;

namespace MonoTests.System.Data.Odbc
{

  [TestFixture]
  public class OdbcDataReaderTest : MySqlOdbcBaseClient 
  {
          
          [SetUp]
          public void GetReady () {
                OpenConnection ();
                CreateTestSetup (); // create database & test tables
          }

          [TearDown]
          public void Clean () {
                CleanTestSetup (); // clean test database;
                CloseConnection ();
          }

        /// <summary>
        /// Tests the return value of GetByte method of OdbcDataReader
        /// </summary>
        [Test]
        public void GetByteTest () 
        {
                OdbcDataReader reader = null;
                try {
                        // For this Test, you must create sample table
                        // called test, with a column of name 'col_int'.
                        // and the table with atleast a row with a minimum value for col_int as 0xff
                        // This tries to read a int column using GetByte method
                        OdbcCommand cmd = conn.CreateCommand ();
                        string query = "select col_int from test order by col_int;";
                        cmd.CommandText = query;
                        reader = cmd.ExecuteReader ();
                        if (reader.Read ()) {
                                byte b = reader.GetByte (0); 
                                Assertion.AssertEquals ("GetByte returns wrong result!", 0xff, b);
                        } else // This should not happen while testing
                                Assertion.AssertEquals ("test table doens not have a test data!", true, true);
                    } finally { // try/catch is necessary to gracefully close connections
                        if (reader != null && reader.IsClosed)
                                reader.Close ();
                        CleanTestSetup ();
                        CloseConnection ();
                  }
        }

        /// <summary>
        /// Tests the return column type of data reader
        /// To test the bugzilla id 49340
        /// </summary>
        [Test]
        public void ColumnDataTypeTest () 
        {
                OdbcCommand dbcmd = conn.CreateCommand ();
                string sql = "SELECT  * from test";
                dbcmd.CommandText = sql;
                IDataReader reader = dbcmd.ExecuteReader ();
                try {
                        Assertion.AssertEquals ("GetDataTypeName returns invalid Type for column #1", 
                                        "TinyInt", reader.GetDataTypeName (0));
                        Assertion.AssertEquals ("GetDataTypeName returns invalid Type for column #2", 
                                        "VarChar", reader.GetDataTypeName (1));
                        // Test via method GetFieldType.ToString
                        Assertion.AssertEquals ("GetFieldType returns invalid Type for column #1", 
                                        "System.Byte", reader.GetFieldType (0).ToString ());
                        Assertion.AssertEquals ("GetFieldType returns invalid Type for column #2", 
                                        "System.String", reader.GetFieldType (1).ToString ());

                        // Test via method GetSchemaTable
                        reader = dbcmd.ExecuteReader ();
                        DataTable schemaTable = reader.GetSchemaTable ();
                        Assertion.AssertEquals ("GetSchemaTable.ColumnDataType failes for column #1", 
                                        typeof (System.Byte), schemaTable.Rows [0]["DataType"]);
                        Assertion.AssertEquals ("GetSchemaTable.ColumnDataType failes for column #1", 
                                        typeof (System.String), schemaTable.Rows [1]["DataType"]);
              } finally {
                        // clean up
                        if (reader != null && !reader.IsClosed)
                                reader.Close ();
                        reader = null;
                        CleanTestSetup ();
                        CloseConnection ();
              }
        }

        [Test]
        public void GetNameTest () 
        {
              OdbcCommand dbcmd = conn.CreateCommand ();
              string sql = "SELECT  * from test";
              dbcmd.CommandText = sql;
              OdbcDataReader reader = dbcmd.ExecuteReader ();
              try {
                      Assertion.AssertEquals ("GetName failes ", "pk_tint", reader.GetName (0));
              } finally {
                      // clean up
                      if (reader != null && !reader.IsClosed)
                              reader.Close ();
                      reader = null;
                      CleanTestSetup ();
                      CloseConnection ();
              }
      }

      [Test]
      public void GetBytesTest ()
      {
                OdbcCommand cmd = conn.CreateCommand ();
                string sql = "SELECT * FROM test";
                cmd.CommandText = sql;
                OdbcDataReader reader = cmd.ExecuteReader (CommandBehavior.SequentialAccess);
                try {
                        if (reader.Read ()) {
                                // Get By Parts for the column blob
                                int totalsize = 100;
                                int buffsize = 5;
                                int buffstart = 0;
                                long retval = 0;
                                long start = 0;
                                byte [] val = new byte [totalsize];
                                retval = reader.GetBytes (3, start, val, buffstart, buffsize);
                                while (retval == buffsize) {
                                        start += buffsize;
                                        buffstart += buffsize;
                                        retval = reader.GetBytes (3, start, val, buffstart, buffsize);
                                }
                                buffstart += (int) retval;

                                // assemble here.
                                string col = System.Text.Encoding.Default.GetString (val, 0, buffstart);
                                
                                Assertion.AssertEquals ("The assembled value length does not match", 
                                              39, col.Length);
                        }
                } finally {
                        // clean up
                        if (reader != null && !reader.IsClosed)
                                reader.Close ();
                        reader = null;
                        CleanTestSetup ();
                        CloseConnection ();
                }
      }

      [Test]
      public void GetBytesNullBufferTest ()
      {
                OdbcCommand cmd = conn.CreateCommand ();
                string sql = "SELECT * FROM test";
                cmd.CommandText = sql;
                OdbcDataReader reader = cmd.ExecuteReader (CommandBehavior.SequentialAccess);
                try {
                        if (reader.Read ()) {
                                Assertion.AssertEquals ("GetBytes on a fixed length column does not work!", 
                                                  11, reader.GetBytes (1,0,null,0,0));
                                Assertion.AssertEquals ("GetBytes with non null column does not work!", 
                                                  39, reader.GetBytes (3,0,null,0,0));
                        }
                        // for null value, length in bytes should return 0
                        if (reader.Read ()) 
                                Assertion.AssertEquals ("GetBytes with null column does not return -1" ,
                                                  -1, reader.GetBytes (3,0,null,0,0));
                } finally {
                        // clean up
                        if (reader != null && !reader.IsClosed )
                                reader.Close ();
                        reader = null;
                        CleanTestSetup ();
                        CloseConnection ();
                }
      }

      [Test]
      public void GetValueBinaryTest ()
      {
                OdbcCommand cmd = conn.CreateCommand ();
                string sql = "SELECT * FROM test";
                cmd.CommandText = sql;
                OdbcDataReader reader = cmd.ExecuteReader (CommandBehavior.SequentialAccess);
                try {
                        if (reader.Read ()) {
                                object ob = reader.GetValue (3);
                                Assertion.AssertEquals ("Type of binary column is wrong!", 
                                                "System.Byte[]", ob.GetType ().ToString () );
                        }
                } finally {
                        // clean up
                        if (reader != null && !reader.IsClosed )
                                reader.Close ();
                        reader = null;
                        CleanTestSetup ();
                        CloseConnection ();
                }
      }
  }
}