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ExceptionTests.cs
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// project created on 30/11/2002 at 22:00
//
// Author:
// David Rowley <dgrowley@gmail.com>
// Francisco Figueiredo Jr. <fxjrlists@yahoo.com>
//
// Copyright (C) 2002 The Npgsql Development Team
// npgsql-general@gborg.postgresql.org
// http://gborg.postgresql.org/project/npgsql/projdisplay.php
//
// This library is free software; you can redistribute it and/or
// modify it under the terms of the GNU Lesser General Public
// License as published by the Free Software Foundation; either
// version 2.1 of the License, or (at your option) any later version.
//
// This library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
// Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public
// License along with this library; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
using System;
using System.Data;
using System.Web.UI.WebControls;
using Npgsql;
using NpgsqlTypes;
using NUnit.Framework;
using NUnit.Framework.Constraints;
namespace Npgsql.Tests
{
[TestFixture]
public class ExceptionTests : TestBase
{
public ExceptionTests(string backendVersion) : base(backendVersion) { }
[Test, Description("Generates a basic server-side exception, checks that it's properly raised and populated")]
public void Basic()
{
// Make sure messages are in English
ExecuteNonQuery(@"SET lc_messages='English_United States.1252'");
ExecuteNonQuery(@"
CREATE OR REPLACE FUNCTION emit_exception() RETURNS VOID AS
'BEGIN RAISE EXCEPTION ''testexception'' USING ERRCODE = ''12345''; END;'
LANGUAGE 'plpgsql';
");
NpgsqlException ex = null;
try
{
ExecuteNonQuery("SELECT emit_exception()");
Assert.Fail("No exception was thrown");
}
catch (NpgsqlException e)
{
ex = e;
}
Assert.That(ex.MessageText, Is.EqualTo("testexception"));
Assert.That(ex.Severity, Is.EqualTo("ERROR"));
Assert.That(ex.Code, Is.EqualTo("12345"));
Assert.That(ex.Position, Is.EqualTo(0));
var data = ex.Data;
Assert.That(data["Severity"], Is.EqualTo("ERROR"));
Assert.That(data["Code"], Is.EqualTo("12345"));
Assert.That(data.Contains("Position"), Is.False);
Assert.That(ExecuteScalar("SELECT 1"), Is.EqualTo(1), "Connection in bad state after an exception");
}
[Test]
[MinPgVersion(9, 3, 0, "5 error fields haven't been added yet")]
public void ExceptionFieldsArePopulated()
{
const string dropTable = @"DROP TABLE IF EXISTS public.uniqueviolation";
const string createTable = @"CREATE TABLE public.uniqueviolation (id INT NOT NULL, CONSTRAINT uniqueviolation_pkey PRIMARY KEY (id))";
const string insertStatement = @"INSERT INTO public.uniqueviolation (id) VALUES(1)";
// In this case we'll test a simple unique violation, we're not too interested in testing more
// cases than this as the same code is executed in all error situations.
try
{
var command = new NpgsqlCommand(dropTable, Conn);
command.ExecuteNonQuery();
command = new NpgsqlCommand(createTable, Conn);
command.ExecuteNonQuery();
command = new NpgsqlCommand(insertStatement, Conn);
command.ExecuteNonQuery();
//Now cause the unique violation...
command.ExecuteNonQuery();
}
catch (NpgsqlException ex)
{
Assert.That(ex.ColumnName, Is.Null, "ColumnName should not be populated for unique violations");
Assert.That(ex.TableName, Is.EqualTo("uniqueviolation"));
Assert.That(ex.SchemaName, Is.EqualTo("public"));
Assert.That(ex.ConstraintName, Is.EqualTo("uniqueviolation_pkey"));
Assert.That(ex.DataTypeName, Is.Null, "DataTypeName should not be populated for unique violations");
}
}
[Test]
[MinPgVersion(9, 3, 0, "5 error fields haven't been added yet")]
public void ColumnNameExceptionFieldIsPopulated()
{
const string dropTable = @"DROP TABLE IF EXISTS public.notnullviolation";
const string createTable = @"CREATE TABLE public.notnullviolation (id INT NOT NULL)";
const string insertStatement = @"INSERT INTO public.notnullviolation (id) VALUES(NULL)";
try
{
var command = new NpgsqlCommand(dropTable, Conn);
command.ExecuteNonQuery();
command = new NpgsqlCommand(createTable, Conn);
command.ExecuteNonQuery();
command = new NpgsqlCommand(insertStatement, Conn);
//Cause the NOT NULL violation
command.ExecuteNonQuery();
}
catch (NpgsqlException ex)
{
Assert.AreEqual("public", ex.SchemaName);
Assert.AreEqual("notnullviolation", ex.TableName);
Assert.AreEqual("id", ex.ColumnName);
}
}
[Test]
[MinPgVersion(9, 3, 0, "5 error fields haven't been added yet")]
public void DataTypeNameExceptionFieldIsPopulated()
{
// On reading the source code for PostgreSQL9.3beta1, the only time that the
// datatypename field is populated is when using domain types. So here we'll
// create a domain that simply does not allow NULLs then try and cast NULL
// to it.
const string dropDomain = @"DROP DOMAIN IF EXISTS public.intnotnull";
const string createDomain = @"CREATE DOMAIN public.intnotnull AS INT NOT NULL";
const string castStatement = @"SELECT CAST(NULL AS public.intnotnull)";
try
{
var command = new NpgsqlCommand(dropDomain, Conn);
command.ExecuteNonQuery();
command = new NpgsqlCommand(createDomain, Conn);
command.ExecuteNonQuery();
command = new NpgsqlCommand(castStatement, Conn);
//Cause the NOT NULL violation
command.ExecuteNonQuery();
}
catch (NpgsqlException ex)
{
Assert.AreEqual("public", ex.SchemaName);
Assert.AreEqual("intnotnull", ex.DataTypeName);
}
}
}
}