public void AddWithExistingKey()
{
using (var context = new MyContext())
{
var value = new MyValue { Id = 1, Value = "1" };
context.Values.Add(value);
var value2 = new MyValue { Id = 1, Value = "2" };
Assert.IsFalse(context.Values.Add(value2));
}
}
public void DeleteNonTracked()
{
using (var context = new MyContext())
{
var value = new MyValue { Id = 1, Value = "1" };
Assert.IsTrue(context.Values.Delete(value));
Assert.AreEqual(1, context.Values.Local.Count());
Assert.IsFalse(context.Values.Add(value));
Assert.AreEqual(1, context.Values.Local.Count());
}
}
public void AddRange()
{
using (var context = new MyContext())
{
var values = new[]
{
new MyValue { Id = 1, Value = "1" },
new MyValue { Id = 2, Value = "2" },
new MyValue { Id = 3, Value = "3" },
new MyValue { Id = 4, Value = "4" }
};
//add and check if there
context.Values.AddRange(values);
Assert.AreEqual(4, context.ChangeTracker.Entries().Count());
//add again, and check if no changes...
context.Values.AddRange(values);
Assert.AreEqual(4, context.ChangeTracker.Entries().Count());
}
}
public void WhereContainsWithPageSize()
{
using (var context = new MyContext(ConnectionString))
{
if (context.Database.Connection.State == ConnectionState.Closed)
context.Database.Connection.Open();
if (context.Database.Connection.ServerVersion.CompareTo("2.0.4") < 0)
{
Debug.WriteLine("Cassandra bug in place: https://issues.apache.org/jira/browse/CASSANDRA-6464");
return;
}
var values = context.Values.Where(r => new[] { 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21 }.Contains(r.Id)).WithPageSize(10).ToList();
Assert.AreEqual(21, values.Count, "Unexpected number of results");
for (int i = 1; i <= 21; i++)
{
Assert.IsTrue(values.Any(v => v.Id == i), "Missing value " + i);
}
}
}
public void NoTrackingContextAddAttachDeleteDetachEntity()
{
using (var context = new MyContext())
{
context.TrackChanges = false;
var value = new MyValue { Id = 1, Value = "1" };
Assert.IsFalse(context.Values.Attach(value));
Assert.IsFalse(context.Values.Add(value));
Assert.IsFalse(context.Values.Delete(value));
Assert.IsFalse(context.Values.Detach(value));
Assert.IsFalse(context.ChangeTracker.HasChanges());
Assert.AreEqual(0, context.Values.Local.Count());
}
}
public void AddThenAttach()
{
using (var context = new MyContext())
{
var value = new MyValue { Id = 1, Value = "1" };
context.Values.Add(value);
Assert.IsFalse(context.Values.Attach(value));
}
}
public void CompileLongCount()
{
Func<MyContext, int, long> compiledQuery =
CompiledQuery.Compile<MyContext, int, long>(
(context, id) => context.Values.LongCount(val => val.Id == id));
using (var context = new MyContext(ConnectionString))
{
var count = compiledQuery(context, 2);
Assert.AreEqual(1, count);
}
}
public void CompileSingleArgument()
{
Func<MyContext, int, MyValue> compiledQuery =
CompiledQuery.Compile<MyContext, int, MyValue>(
(context, id) => context.Values.Single(val => val.Id == id));
using (var context = new MyContext(ConnectionString))
{
var singleValue = compiledQuery(context, 2);
Assert.IsNotNull(singleValue);
Assert.AreEqual(2, singleValue.Id);
Assert.AreEqual("Hallo 2", singleValue.Value);
}
}
public void UpdateInExternalTransaction()
{
using (var connection = new CqlConnection(ConnectionString))
using (var transaction = connection.BeginTransaction())
using (var context = new MyContext(connection, false))
{
context.Database.Log = cql => Debug.WriteLine("EXECUTE QUERY: " + cql);
context.Database.UseTransaction(transaction);
var value = context.Values.Find(500);
value.Value = "Hallo daar!";
context.SaveChanges(false);
var command = new CqlCommand(connection, "update myvalue set value='adjusted' where id=500");
command.Transaction = transaction;
command.ExecuteNonQuery();
transaction.Commit();
//accept all changes only after commit
context.AcceptAllChanges();
}
using (var context = new MyContext(ConnectionString))
{
var value = context.Values.Find(500);
Assert.IsNotNull(value);
Assert.AreEqual("adjusted", value.Value);
}
}
public void UpdateTwiceInTwoTransactions()
{
using (var context = new MyContext(ConnectionString))
{
context.Database.Log = cql => Debug.WriteLine("EXECUTE QUERY: " + cql);
var value = context.Values.Find(400);
using (var transaction1 = context.Database.BeginTransaction())
{
value.Value = "Hallo daar!";
context.SaveChanges();
transaction1.Commit();
}
using (var transaction2 = context.Database.BeginTransaction())
{
transaction2.BatchType = CqlBatchType.Unlogged;
value.Value = "Nog een keer";
context.SaveChanges();
transaction2.Commit();
}
}
using (var context = new MyContext(ConnectionString))
{
var value = context.Values.Find(400);
Assert.IsNotNull(value);
Assert.AreEqual("Nog een keer", value.Value);
}
}
public void UpdateTwiceInSingleTransactionAndRollback()
{
using (var context = new MyContext(ConnectionString))
using (var transaction = context.Database.BeginTransaction())
{
context.Database.Log = cql => Debug.WriteLine("EXECUTE QUERY: " + cql);
var value = context.Values.Find(300);
value.Value = "Hallo daar!";
context.SaveChanges();
value.Value = "Oops...";
context.SaveChanges();
transaction.Rollback();
}
using (var context = new MyContext(ConnectionString))
{
var value = context.Values.Find(300);
Assert.IsNotNull(value);
Assert.AreEqual("Hallo 300", value.Value);
}
}
public void FindAndFindAgain()
{
int count = 0;
using (var context = new MyContext(ConnectionString))
{
context.Database.Log = cql =>
{
count++;
Debug.WriteLine("EXECUTE QUERY: " + cql);
};
var value = context.Values.Find(100);
var value2 = context.Values.Find(100);
//check if same value is returned
Assert.AreSame(value, value2);
//only one query was executed
Assert.AreEqual(1, count);
}
}
public void FindUpdateAndReload()
{
using (var context = new MyContext(ConnectionString))
{
context.Database.Log = cql => Debug.WriteLine("EXECUTE QUERY: " + cql);
//get entity
var value = context.Values.Find(101);
Assert.IsNotNull(value);
//get entry
var entry = context.ChangeTracker.Entry(value);
Assert.IsNotNull(entry);
//change it
value.Value = "Hallo daar!";
Assert.IsTrue(context.ChangeTracker.DetectChanges());
Assert.AreEqual(EntityState.Modified, entry.State);
//reload
entry.Reload();
Assert.AreEqual(EntityState.Unchanged, entry.State);
Assert.IsFalse(context.ChangeTracker.HasChanges());
}
}
public void FindAndUpdate()
{
using (var context = new MyContext(ConnectionString))
{
context.Database.Log = cql => Debug.WriteLine("EXECUTE QUERY: " + cql);
var value = context.Values.Find(100);
value.Value = "Hallo daar!";
context.SaveChanges();
}
using (var context = new MyContext(ConnectionString))
{
var value = context.Values.Find(100);
Assert.IsNotNull(value);
Assert.AreEqual("Hallo daar!", value.Value);
}
}
public void EmumerateMultiple()
{
using (var context = new MyContext(ConnectionString))
{
var query = context.Values.Where(r => new[] { 1, 2, 3, 4 }.Contains(r.Id));
Assert.AreEqual(4, query.Count(), "Unexpected number of results");
var results = query.ToList();
for (int i = 1; i <= 4; i++)
{
Assert.IsTrue(results.Any(v => v.Id == i), "Missing value " + i);
}
}
}
public void CompileSimpleSelect()
{
Func<MyContext, MyValue> compiledQuery =
CompiledQuery.Compile<MyContext, MyValue>(
(context) => context.Values.First(val => val.Id == 1));
using (var context = new MyContext(ConnectionString))
{
var first = compiledQuery(context);
Assert.IsNotNull(first);
Assert.AreEqual(1, first.Id);
Assert.AreEqual("Hallo 1", first.Value);
}
}
public void CompileSimpleSelectWithParam()
{
Func<MyContext, string, string> compiledQuery =
CompiledQuery.Compile<MyContext, string, string>(
(context, append) => context.Values.Where(val => val.Id == 1).Select(val => val.Value + append).First());
using (var context = new MyContext(ConnectionString))
{
var first = compiledQuery(context, " ook");
Assert.IsNotNull(first);
Assert.AreEqual("Hallo 1 ook", first);
}
}
public void SelectAndUpdate()
{
using (var context = new MyContext(ConnectionString))
{
context.Database.Log = cql => Debug.WriteLine("EXECUTE QUERY: " + cql);
var query = context.Values.Where(r => new[] { 201, 202, 203, 204 }.Contains(r.Id)).ToList();
query[1].Value = "Zo gaan we weer verder";
context.SaveChanges();
}
using (var context = new MyContext(ConnectionString))
{
var value = context.Values.Find(202);
Assert.IsNotNull(value);
Assert.AreEqual("Zo gaan we weer verder", value.Value);
}
}
public void CompileAny()
{
Func<MyContext, int, bool> compiledQuery =
CompiledQuery.Compile<MyContext, int, bool>(
(context, id) => context.Values.Any(val => val.Id == id));
using (var context = new MyContext(ConnectionString))
{
var any = compiledQuery(context, 2);
Assert.AreEqual(true, any);
}
}
public async Task SelectAndDelete()
{
using (var context = new MyContext(ConnectionString))
{
context.Database.Log = cql => Debug.WriteLine("EXECUTE QUERY: " + cql);
var query = context.Values.Where(r => new[] { 701, 702, 703, 704 }.Contains(r.Id)).ToList();
EntityEntry<MyValue> entry = context.ChangeTracker.Entry(query[1]);
Assert.IsNotNull(entry);
Assert.AreEqual(EntityState.Unchanged, entry.State);
Assert.IsTrue(context.Values.Delete(query[1]));
Assert.AreEqual(EntityState.Deleted, entry.State);
await context.SaveChangesAsync();
Assert.AreEqual(EntityState.Detached, entry.State);
}
using (var context = new MyContext(ConnectionString))
{
var value = context.Values.Find(702);
Assert.IsNull(value, "Value was not deleted");
}
}
public void CompileWhereContainsToDictionary()
{
Func<MyContext, IEnumerable<int>, IDictionary<int, MyValue>> compiledQuery =
CompiledQuery.Compile<MyContext, IEnumerable<int>, IDictionary<int, MyValue>>
(
(context, ids) => context.Values.Where(r => ids.Contains(r.Id)).ToDictionary(v => v.Id)
);
using (var context = new MyContext(ConnectionString))
{
var values = compiledQuery(context, new[] { 1, 2, 3, 4 });
Assert.AreEqual(4, values.Count, "Unexpected number of results");
for (int i = 1; i <= 4; i++)
{
Assert.IsTrue(values.Keys.Any(key => key == i), "Missing value " + i);
}
}
}
public void AddNewEntity()
{
int count = 0;
using (var context = new MyContext(ConnectionString))
{
context.Database.Log = cql =>
{
count++;
Debug.WriteLine("EXECUTE QUERY: " + cql);
};
var newValue = new MyValue { Id = 20000, Value = "Hallo 20000" };
bool added = context.Values.Add(newValue);
Assert.IsTrue(added);
context.SaveChanges();
//try save again (should do nothing)
context.SaveChanges();
Assert.AreEqual(1, count, "Save again introduces new query!");
//try find (should do nothing)
var entity = context.Values.Find(20000);
Assert.AreSame(newValue, entity);
Assert.AreEqual(1, count, "Find introduces new query!");
}
using (var context = new MyContext(ConnectionString))
{
var value = context.Values.Find(20000);
Assert.IsNotNull(value);
Assert.AreEqual("Hallo 20000", value.Value);
}
}
public void AttachDetach()
{
using (var context = new MyContext())
{
var value = new MyValue { Id = 1, Value = "1" };
Assert.IsTrue(context.Values.Attach(value));
Assert.IsFalse(context.Values.Attach(value));
Assert.IsTrue(context.Values.Detach(value));
Assert.IsFalse(context.Values.Detach(value));
Assert.IsFalse(context.ChangeTracker.HasChanges());
Assert.AreEqual(0, context.Values.Local.Count());
}
}
public void AddAndChangeNewEntity()
{
int count = 0;
using (var context = new MyContext(ConnectionString))
{
context.Database.Log = cql =>
{
count++;
Debug.WriteLine("EXECUTE QUERY: " + cql);
};
var newValue = new MyValue { Id = 30000, Value = "Hallo 30000" };
bool added = context.Values.Add(newValue);
Assert.IsTrue(added);
IEntityEntry entry = context.ChangeTracker.Entry(newValue);
Assert.IsNotNull(entry);
Assert.AreEqual(EntityState.Added, entry.State);
context.SaveChanges();
Assert.AreEqual(EntityState.Unchanged, entry.State);
newValue.Value = "Hallo weer!";
context.SaveChanges();
Assert.AreEqual(2, count, "Where is my query?");
}
using (var context = new MyContext(ConnectionString))
{
var value = context.Values.Find(30000);
Assert.IsNotNull(value);
Assert.AreEqual("Hallo weer!", value.Value);
}
}
public void ContextDisableTrackingClearsTrackedEntries()
{
using (var context = new MyContext())
{
var value = new MyValue { Id = 1, Value = "1" };
Assert.IsTrue(context.Values.Add(value));
Assert.IsTrue(context.ChangeTracker.HasChanges());
context.TrackChanges = false;
Assert.IsFalse(context.ChangeTracker.HasChanges());
Assert.AreEqual(0, context.ChangeTracker.Entries<MyValue>().Count());
Assert.AreEqual(0, context.ChangeTracker.Entries().Count());
}
}
public void QueryNoTracking()
{
using (var context = new MyContext(ConnectionString))
{
var query = context.Values.Where(r => new[] { 701, 702, 703, 704 }.Contains(r.Id)).AsNoTracking().ToList();
Assert.IsNull(context.ChangeTracker.Entry(query[1]));
}
}
public void QueryContextNoTracking()
{
using (var context = new MyContext(ConnectionString))
{
context.TrackChanges = false;
//query, and check if tracked
var query = context.Values.Where(r => new[] { 701, 702, 703, 704 }.Contains(r.Id)).ToList();
Assert.IsNull(context.ChangeTracker.Entry(query[1]));
}
}
public async Task FindContextNoTracking()
{
int count = 0;
using (var context = new MyContext(ConnectionString))
{
context.TrackChanges = false;
context.Database.Log = cql =>
{
count++;
Debug.WriteLine("EXECUTE QUERY: " + cql);
};
//find and check if tracked
var entity = await context.Values.FindAsync(1);
Assert.IsNotNull(entity);
Assert.IsNull(context.ChangeTracker.Entry(entity));
//find again and check if tracked
var entity2 = await context.Values.FindAsync(1);
Assert.IsNotNull(entity);
Assert.IsNull(context.ChangeTracker.Entry(entity2));
//expecting two different objects
Assert.AreNotSame(entity, entity2);
//expecting two queries
Assert.AreEqual(2, count);
}
}
public void ChangeKeyResultsInException()
{
using (var context = new MyContext())
{
context.ChangeTracker.AutoDetectChangesEnabled = false;
var value = new MyValue { Id = 1, Value = "1" };
Assert.IsTrue(context.Values.Add(value));
Assert.IsTrue(context.ChangeTracker.HasChanges());
value.Id = 2;
//next should throw exception
context.ChangeTracker.DetectChanges();
}
}
public void WhereContainsWithConsistency()
{
using (var context = new MyContext(ConnectionString))
{
var values = context.Values.Where(r => new[] { 1, 2, 3, 4 }.Contains(r.Id)).WithConsistency(CqlConsistency.One).ToList();
Assert.AreEqual(4, values.Count, "Unexpected number of results");
for (int i = 1; i <= 4; i++)
{
Assert.IsTrue(values.Any(v => v.Id == i), "Missing value " + i);
}
}
}
