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BitStringTests.cs
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using System;
using System.Collections;
using System.Collections.Specialized;
using System.Data;
using System.Threading.Tasks;
using NpgsqlTypes;
using NUnit.Framework;
namespace Npgsql.Tests.Types
{
/// <summary>
/// Tests on the PostgreSQL BitString type
/// </summary>
/// <remarks>
/// https://www.postgresql.org/docs/current/static/datatype-bit.html
/// </remarks>
public class BitStringTests : MultiplexingTestBase
{
[Test]
public async Task RoundtripBitArray(
[Values(
"1011011000101111010110101101011011", // 34 bits
"10110110",
""
)]
string bits
)
{
var expected = new BitArray(bits.Length);
for (var i = 0; i < bits.Length; i++)
expected[i] = bits[i] == '1';
using var conn = await OpenConnectionAsync();
using var cmd = new NpgsqlCommand("SELECT @p1, @p2, @p3, @p4", conn);
var p1 = new NpgsqlParameter("p1", NpgsqlDbType.Varbit);
var p2 = new NpgsqlParameter("p2", NpgsqlDbType.Bit);
var p3 = new NpgsqlParameter("p3", NpgsqlDbType.Varbit) {Value = bits};
var p4 = new NpgsqlParameter {ParameterName = "p4", Value = expected};
cmd.Parameters.Add(p1);
cmd.Parameters.Add(p2);
cmd.Parameters.Add(p3);
cmd.Parameters.Add(p4);
p1.Value = p2.Value = expected;
using var reader = await cmd.ExecuteReaderAsync();
reader.Read();
for (var i = 0; i < cmd.Parameters.Count; i++)
{
Assert.That(reader.GetFieldValue<BitArray>(i), Is.EqualTo(expected));
Assert.That(reader.GetValue(i), Is.EqualTo(expected));
Assert.That(() => reader.GetFieldValue<bool>(i), Throws.Exception.TypeOf<InvalidCastException>());
}
}
[Test]
public async Task Long()
{
using var conn = await OpenConnectionAsync();
var bitLen = (conn.Settings.WriteBufferSize + 10) * 8;
var chars = new char[bitLen];
for (var i = 0; i < bitLen; i++)
chars[i] = i % 2 == 0 ? '0' : '1';
await RoundtripBitArray(new string(chars));
}
[Test]
public async Task RoundtripBitVector32([Values(15, 0)] int bits)
{
var expected = new BitVector32(bits);
using var conn = await OpenConnectionAsync();
using var cmd = new NpgsqlCommand("SELECT @p", conn);
cmd.Parameters.AddWithValue("p", expected);
using var reader = await cmd.ExecuteReaderAsync();
reader.Read();
Assert.That(reader.GetFieldValue<BitVector32>(0), Is.EqualTo(expected));
}
[Test]
public async Task BitVector32TooLong()
{
using var conn = await OpenConnectionAsync();
using (var cmd = new NpgsqlCommand($"SELECT B'{new string('0', 34)}'", conn))
using (var reader = await cmd.ExecuteReaderAsync())
{
reader.Read();
Assert.That(() => reader.GetFieldValue<BitVector32>(0), Throws.Exception.TypeOf<InvalidCastException>());
}
Assert.That(await conn.ExecuteScalarAsync("SELECT 1"), Is.EqualTo(1));
}
[Test, Description("Roundtrips a single bit")]
public async Task SingleBit()
{
using var conn = await OpenConnectionAsync();
using var cmd = new NpgsqlCommand("SELECT @p::BIT(1), B'01'::BIT(2)", conn);
const bool expected = true;
var p = new NpgsqlParameter("p", NpgsqlDbType.Bit);
// Type inference? But bool is mapped to PG bool
cmd.Parameters.Add(p);
p.Value = expected;
using var reader = await cmd.ExecuteReaderAsync();
reader.Read();
Assert.That(reader.GetBoolean(0), Is.EqualTo(true));
Assert.That(reader.GetValue(0), Is.EqualTo(true));
Assert.That(reader.GetFieldValue<bool>(0), Is.EqualTo(true));
Assert.That(reader.GetFieldType(0), Is.EqualTo(typeof(bool)));
}
[Test, Description("BIT(N) shouldn't be accessible as bool")]
public async Task BitstringAsSingleBit()
{
using var conn = await OpenConnectionAsync();
using (var cmd = new NpgsqlCommand("SELECT B'01'::BIT(2)", conn))
using (var reader = await cmd.ExecuteReaderAsync(CommandBehavior.SequentialAccess))
{
reader.Read();
Assert.That(() => reader.GetBoolean(0), Throws.Exception.TypeOf<InvalidCastException>());
}
// Connection should still be OK
Assert.That(await conn.ExecuteScalarAsync("SELECT 1"), Is.EqualTo(1));
}
[Test]
public async Task Array()
{
using var conn = await OpenConnectionAsync();
using var cmd = new NpgsqlCommand("SELECT @p", conn);
var expected = new[] { new BitArray(new[] { true, false, true }), new BitArray(new[] { false }) };
var p = new NpgsqlParameter("p", NpgsqlDbType.Array | NpgsqlDbType.Varbit) { Value = expected };
cmd.Parameters.Add(p);
p.Value = expected;
using var reader = await cmd.ExecuteReaderAsync();
reader.Read();
Assert.That(reader.GetValue(0), Is.EqualTo(expected));
Assert.That(reader.GetFieldValue<BitArray[]>(0), Is.EqualTo(expected));
Assert.That(reader.GetFieldType(0), Is.EqualTo(typeof(Array)));
}
[Test]
public async Task SingleBitArray()
{
using var conn = await OpenConnectionAsync();
using var cmd = new NpgsqlCommand("SELECT @p::BIT(1)[]", conn);
var expected = new[] { true, false };
var p = new NpgsqlParameter("p", NpgsqlDbType.Array | NpgsqlDbType.Bit) {Value = expected};
cmd.Parameters.Add(p);
p.Value = expected;
using var reader = await cmd.ExecuteReaderAsync();
reader.Read();
var x = reader.GetValue(0);
Assert.That(reader.GetValue(0), Is.EqualTo(expected));
Assert.That(reader.GetFieldValue<bool[]>(0), Is.EqualTo(expected));
Assert.That(reader.GetFieldType(0), Is.EqualTo(typeof(Array)));
}
[Test]
public async Task Validation()
{
using var conn = await OpenConnectionAsync();
using var cmd = new NpgsqlCommand("SELECT @p1::BIT VARYING", conn);
var p = new NpgsqlParameter("p1", NpgsqlDbType.Bit);
cmd.Parameters.Add(p);
p.Value = "001q0";
Assert.That(async () => await cmd.ExecuteReaderAsync(), Throws.Exception.TypeOf<FormatException>());
// Make sure the connection state is OK
Assert.That(await conn.ExecuteScalarAsync("SELECT 8"), Is.EqualTo(8));
}
[Test, IssueLink("https://github.com/npgsql/npgsql/issues/2766")]
[Timeout(3000)]
public async Task SequentialReadOfOversizedBitArray()
{
using var conn = await OpenConnectionAsync();
using var cmd = new NpgsqlCommand("SELECT 1::bit(100000)", conn);
using var reader = await cmd.ExecuteReaderAsync(CommandBehavior.SequentialAccess);
reader.Read();
var actual = reader.GetFieldValue<BitArray>(0);
Assert.That(actual, Has.Length.EqualTo(100000));
}
// Older tests from here
// TODO: Bring this test back
#if FIX
[Test]
public async Task BitString([Values(true, false)] bool prepareCommand)
{
using (var cmd = Conn.CreateCommand())
{
cmd.CommandText = "Select :bs1 as output, :bs2, :bs3, :bs4, :bs5, array [1::bit, 0::bit], array [bit '10', bit '01'], :ba1, :ba2, :ba3";
var output = new NpgsqlParameter() { ParameterName = "output", Direction = ParameterDirection.Output };
cmd.Parameters.Add(output);
cmd.Parameters.Add(new NpgsqlParameter("bs1", NpgsqlDbType.Bit) { Value = new BitString("1011") });
cmd.Parameters.Add(new NpgsqlParameter("bs2", NpgsqlDbType.Bit, 1) { Value = true });
cmd.Parameters.Add(new NpgsqlParameter("bs3", NpgsqlDbType.Bit, 1) { Value = false });
cmd.Parameters.Add(new NpgsqlParameter("bs4", NpgsqlDbType.Bit, 2) { Value = new BitString("01") });
cmd.Parameters.Add(new NpgsqlParameter("bs5", NpgsqlDbType.Varbit) { Value = new BitString("01") });
cmd.Parameters.Add(new NpgsqlParameter("ba1", NpgsqlDbType.Varbit | NpgsqlDbType.Array) { Value = new BitString[] { new BitString("10"), new BitString("01") } });
cmd.Parameters.Add(new NpgsqlParameter("ba2", NpgsqlDbType.Bit | NpgsqlDbType.Array, 1) { Value = new bool[] { true, false } });
cmd.Parameters.Add(new NpgsqlParameter("ba3", NpgsqlDbType.Bit | NpgsqlDbType.Array, 1) { Value = new BitString[] { new BitString("1"), new BitString("0") } });
if (prepareCommand)
cmd.Prepare();
using (var reader = await cmd.ExecuteReaderAsync())
{
reader.Read();
Assert.IsTrue(new BitString("1011") == (BitString)output.Value);
Assert.IsTrue(new BitString("1011") == (BitString)reader.GetValue(0));
Assert.AreEqual(true, reader.GetValue(1));
Assert.AreEqual(false, reader.GetValue(2));
Assert.IsTrue(new BitString("01") == (BitString)reader.GetValue(3));
Assert.IsTrue(new BitString("01") == (BitString)reader.GetValue(4));
Assert.AreEqual(true, ((bool[])reader.GetValue(5))[0]);
Assert.AreEqual(false, ((bool[])reader.GetValue(5))[1]);
for (int i = 6; i <= 7; i++)
{
Assert.AreEqual(new BitString("10"), ((BitString[])reader.GetValue(i))[0]);
Assert.AreEqual(new BitString("01"), ((BitString[])reader.GetValue(i))[1]);
}
for (int i = 8; i <= 9; i++)
{
Assert.AreEqual(true, ((bool[])reader.GetValue(i))[0]);
Assert.AreEqual(false, ((bool[])reader.GetValue(i))[1]);
}
}
}
}
#endif
public BitStringTests(MultiplexingMode multiplexingMode) : base(multiplexingMode) {}
}
}