dev-npgsql/npgsql: Npgsql is the .NET data provider for PostgreSQL.

test/Npgsql.Tests/AsyncTests.cs

47 строк1 KB

Shay Rojansky

Apply file-scoped namespaces for 6.0 (#4298)

28 янв 2022, 15:13

28 янв 2022, 15:132e0ad2d

using System.Data;
using System.Threading.Tasks;
using NUnit.Framework;

namespace Npgsql.Tests;

public class AsyncTests : TestBase
{
    [Test]
    public async Task NonQuery()
    {
        using var conn = OpenConnection();
        conn.ExecuteNonQuery("CREATE TEMP TABLE data (int INTEGER)");
        using (var cmd = new NpgsqlCommand("INSERT INTO data (int) VALUES (4)", conn))
            await cmd.ExecuteNonQueryAsync();
        Assert.That(conn.ExecuteScalar("SELECT int FROM data"), Is.EqualTo(4));
    }

    [Test]
    public async Task Scalar()
    {
        using var conn = OpenConnection();
        using var cmd = new NpgsqlCommand("SELECT 1", conn);
        Assert.That(await cmd.ExecuteScalarAsync(), Is.EqualTo(1));
    }

    [Test]
    public async Task Reader()
    {
        using var conn = OpenConnection();
        using var cmd = new NpgsqlCommand("SELECT 1", conn);
        using var reader = await cmd.ExecuteReaderAsync();
        await reader.ReadAsync();
        Assert.That(reader[0], Is.EqualTo(1));
    }

    [Test]
    public async Task Columnar()
    {
        using var conn = OpenConnection();
        using var cmd = new NpgsqlCommand("SELECT NULL, 2, 'Some Text'", conn);
        using var reader = await cmd.ExecuteReaderAsync(CommandBehavior.SequentialAccess);
        await reader.ReadAsync();
        Assert.That(await reader.IsDBNullAsync(0), Is.True);
        Assert.That(await reader.GetFieldValueAsync<string>(2), Is.EqualTo("Some Text"));
    }
}