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SqlServerSequenceValueGeneratorTest.cs
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SqlServerSequenceValueGeneratorTest.cs
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// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
using System.Globalization;
using Microsoft.EntityFrameworkCore.Metadata.Internal;
using Microsoft.EntityFrameworkCore.SqlServer.Infrastructure.Internal;
using Microsoft.EntityFrameworkCore.SqlServer.Storage.Internal;
using Microsoft.EntityFrameworkCore.SqlServer.Update.Internal;
using Microsoft.EntityFrameworkCore.SqlServer.ValueGeneration.Internal;
// ReSharper disable InconsistentNaming
namespace Microsoft.EntityFrameworkCore;
public class SqlServerSequenceValueGeneratorTest
{
[ConditionalTheory]
[InlineData(false)]
[InlineData(true)]
public async Task Generates_sequential_int_values(bool async)
=> await Generates_sequential_values<int>(async);
[ConditionalTheory]
[InlineData(false)]
[InlineData(true)]
public async Task Generates_sequential_long_values(bool async)
=> await Generates_sequential_values<long>(async);
[ConditionalTheory]
[InlineData(false)]
[InlineData(true)]
public async Task Generates_sequential_short_values(bool async)
=> await Generates_sequential_values<short>(async);
[ConditionalTheory]
[InlineData(false)]
[InlineData(true)]
public async Task Generates_sequential_byte_values(bool async)
=> await Generates_sequential_values<byte>(async);
[ConditionalTheory]
[InlineData(false)]
[InlineData(true)]
public async Task Generates_sequential_uint_values(bool async)
=> await Generates_sequential_values<uint>(async);
[ConditionalTheory]
[InlineData(false)]
[InlineData(true)]
public async Task Generates_sequential_ulong_values(bool async)
=> await Generates_sequential_values<ulong>(async);
[ConditionalTheory]
[InlineData(false)]
[InlineData(true)]
public async Task Generates_sequential_ushort_values(bool async)
=> await Generates_sequential_values<ushort>(async);
[ConditionalTheory]
[InlineData(false)]
[InlineData(true)]
public async Task Generates_sequential_sbyte_values(bool async)
=> await Generates_sequential_values<sbyte>(async);
private async Task Generates_sequential_values<TValue>(bool async)
{
const int blockSize = 4;
var sequence = ((IMutableModel)new Model()).AddSequence("Foo");
sequence.IncrementBy = blockSize;
var state = new SqlServerSequenceValueGeneratorState((ISequence)sequence);
var generator = new SqlServerSequenceHiLoValueGenerator<TValue>(
new FakeRawSqlCommandBuilder(blockSize),
new SqlServerUpdateSqlGenerator(
new UpdateSqlGeneratorDependencies(
new SqlServerSqlGenerationHelper(
new RelationalSqlGenerationHelperDependencies()),
new SqlServerTypeMappingSource(
TestServiceFactory.Instance.Create<TypeMappingSourceDependencies>(),
TestServiceFactory.Instance.Create<RelationalTypeMappingSourceDependencies>(),
new SqlServerSingletonOptions()))),
state,
CreateConnection(),
new FakeRelationalCommandDiagnosticsLogger());
for (var i = 1; i <= 27; i++)
{
var value = async
? await generator.NextAsync(null)
: generator.Next(null);
Assert.Equal(i, (int)Convert.ChangeType(value, typeof(int), CultureInfo.InvariantCulture));
}
}
[ConditionalFact]
public async Task Multiple_threads_can_use_the_same_generator_state()
{
const int threadCount = 50;
const int valueCount = 35;
var generatedValues = await GenerateValuesInMultipleThreads(threadCount, valueCount);
// Check that each value was generated once and only once
var checks = new bool[threadCount * valueCount];
foreach (var values in generatedValues)
{
Assert.Equal(valueCount, values.Count);
foreach (var value in values)
{
checks[value - 1] = true;
}
}
Assert.True(checks.All(c => c));
}
private async Task<IEnumerable<List<long>>> GenerateValuesInMultipleThreads(int threadCount, int valueCount)
{
const int blockSize = 10;
var serviceProvider = SqlServerTestHelpers.Instance.CreateServiceProvider();
var sequence = ((IMutableModel)new Model()).AddSequence("Foo");
sequence.IncrementBy = blockSize;
var state = new SqlServerSequenceValueGeneratorState((ISequence)sequence);
var executor = new FakeRawSqlCommandBuilder(blockSize);
var sqlGenerator = new SqlServerUpdateSqlGenerator(
new UpdateSqlGeneratorDependencies(
new SqlServerSqlGenerationHelper(
new RelationalSqlGenerationHelperDependencies()),
new SqlServerTypeMappingSource(
TestServiceFactory.Instance.Create<TypeMappingSourceDependencies>(),
TestServiceFactory.Instance.Create<RelationalTypeMappingSourceDependencies>(),
new SqlServerSingletonOptions())));
var logger = new FakeRelationalCommandDiagnosticsLogger();
var tests = new Func<Task>[threadCount];
var generatedValues = new List<long>[threadCount];
for (var i = 0; i < tests.Length; i++)
{
var testNumber = i;
generatedValues[testNumber] = new List<long>();
tests[testNumber] = async () =>
{
for (var j = 0; j < valueCount; j++)
{
var connection = CreateConnection(serviceProvider);
var generator = new SqlServerSequenceHiLoValueGenerator<long>(executor, sqlGenerator, state, connection, logger);
var value = j % 2 == 0
? await generator.NextAsync(null)
: generator.Next(null);
generatedValues[testNumber].Add(value);
}
};
}
var tasks = tests.Select(Task.Run).ToArray();
foreach (var t in tasks)
{
await t;
}
return generatedValues;
}
[ConditionalFact]
public void Does_not_generate_temp_values()
{
var sequence = ((IMutableModel)new Model()).AddSequence("Foo");
sequence.IncrementBy = 4;
var state = new SqlServerSequenceValueGeneratorState((ISequence)sequence);
var generator = new SqlServerSequenceHiLoValueGenerator<int>(
new FakeRawSqlCommandBuilder(4),
new SqlServerUpdateSqlGenerator(
new UpdateSqlGeneratorDependencies(
new SqlServerSqlGenerationHelper(
new RelationalSqlGenerationHelperDependencies()),
new SqlServerTypeMappingSource(
TestServiceFactory.Instance.Create<TypeMappingSourceDependencies>(),
TestServiceFactory.Instance.Create<RelationalTypeMappingSourceDependencies>(),
new SqlServerSingletonOptions()))),
state,
CreateConnection(),
new FakeRelationalCommandDiagnosticsLogger());
Assert.False(generator.GeneratesTemporaryValues);
}
private static ISqlServerConnection CreateConnection(IServiceProvider serviceProvider = null)
{
serviceProvider ??= SqlServerTestHelpers.Instance.CreateServiceProvider();
return SqlServerTestHelpers.Instance.CreateContextServices(serviceProvider).GetRequiredService<ISqlServerConnection>();
}
private class FakeRawSqlCommandBuilder : IRawSqlCommandBuilder
{
private readonly int _blockSize;
private long _current;
public FakeRawSqlCommandBuilder(int blockSize)
{
_blockSize = blockSize;
_current = -blockSize + 1;
}
public IRelationalCommand Build(string sql)
=> new FakeRelationalCommand(this);
public RawSqlCommand Build(
string sql,
IEnumerable<object> parameters)
=> new(new FakeRelationalCommand(this), new Dictionary<string, object>());
private class FakeRelationalCommand : IRelationalCommand
{
private readonly FakeRawSqlCommandBuilder _commandBuilder;
public FakeRelationalCommand(FakeRawSqlCommandBuilder commandBuilder)
{
_commandBuilder = commandBuilder;
}
public string CommandText
=> throw new NotImplementedException();
public IReadOnlyList<IRelationalParameter> Parameters
=> throw new NotImplementedException();
public IReadOnlyDictionary<string, object> ParameterValues
=> throw new NotImplementedException();
public int ExecuteNonQuery(RelationalCommandParameterObject parameterObject)
=> throw new NotImplementedException();
public Task<int> ExecuteNonQueryAsync(
RelationalCommandParameterObject parameterObject,
CancellationToken cancellationToken = default)
=> throw new NotImplementedException();
public object ExecuteScalar(RelationalCommandParameterObject parameterObject)
=> Interlocked.Add(ref _commandBuilder._current, _commandBuilder._blockSize);
public Task<object> ExecuteScalarAsync(
RelationalCommandParameterObject parameterObject,
CancellationToken cancellationToken = default)
=> Task.FromResult<object>(Interlocked.Add(ref _commandBuilder._current, _commandBuilder._blockSize));
public RelationalDataReader ExecuteReader(RelationalCommandParameterObject parameterObject)
=> throw new NotImplementedException();
public Task<RelationalDataReader> ExecuteReaderAsync(
RelationalCommandParameterObject parameterObject,
CancellationToken cancellationToken = default)
=> throw new NotImplementedException();
public DbCommand CreateDbCommand(
RelationalCommandParameterObject parameterObject,
Guid commandId,
DbCommandMethod commandMethod)
=> throw new NotImplementedException();
public void PopulateFrom(IRelationalCommandTemplate commandTemplate)
=> throw new NotImplementedException();
}
}
}