//https://github.com/Readify/Neo4jClient/issues/127
public async Task ReturnsCorrectError_WhenTransactionIsAutomaticallyRolledBack_ViaNeo4j_2_2_6_Plus(RestTestHarness.Neo4jVersion version)
{
/* In 2.2.6 ClientErrors (Constraint Violations etc) were changed to Automatically rollback. This created a 404 error when *we* tried to rollback on an error, as the transaction no longer existed. */
var initTransactionRequest = MockRequest.PostJson("/transaction", @"{
'statements': [{'statement': 'MATCH n\r\nRETURN count(n)', 'resultDataContents':[], 'parameters': {}}]}");
var rollbackTransactionRequest = MockRequest.Delete("/transaction/1");
using (var testHarness = new RestTestHarness
{
{
initTransactionRequest,
MockResponse.Json(201, TransactionRestResponseHelper.GenerateCypherErrorResponse(1, "{\"code\":\"Neo.ClientError.Schema.ConstraintViolation\",\"message\":\"Node 19572 already exists with label User and property.\"}"), "http://foo/db/data/transaction/1")
},
{
rollbackTransactionRequest, MockResponse.Json(404, "{\"results\":[],\"errors\":[{\"code\":\"Neo.ClientError.Transaction.UnknownId\",\"message\":\"Unrecognized transaction id. Transaction may have timed out and been rolled back.\"}]}")
}
})
{
var client = testHarness.CreateGraphClient(version);
await client.ConnectAsync();
using (var transaction = client.BeginTransaction())
{
await Assert.ThrowsAsync <NeoException>(async() => await client.Cypher.Match("n").Return(n => n.Count()).ExecuteWithoutResultsAsync());
}
}
}
//https://github.com/Readify/Neo4jClient/issues/127
public async Task ReturnsThe404_WhenVersionIsLessThan_2_2_6(RestTestHarness.Neo4jVersion version)
{
var initTransactionRequest = MockRequest.PostJson("/transaction", @"{
'statements': [{'statement': 'MATCH n\r\nRETURN count(n)', 'resultDataContents':[], 'parameters': {}}]}");
var rollbackTransactionRequest = MockRequest.Delete("/transaction/1");
using (var testHarness = new RestTestHarness
{
{
initTransactionRequest,
MockResponse.Json(201, TransactionRestResponseHelper.GenerateCypherErrorResponse(1, "{\"code\":\"Neo.ClientError.Schema.ConstraintViolation\",\"message\":\"Node 19572 already exists with label User and property.\"}"), "http://foo/db/data/transaction/1")
},
{
rollbackTransactionRequest, MockResponse.Json(404, "{\"results\":[],\"errors\":[{\"code\":\"Neo.ClientError.Transaction.UnknownId\",\"message\":\"Unrecognized transaction id. Transaction may have timed out and been rolled back.\"}]}")
}
})
{
var client = testHarness.CreateGraphClient(version);
await client.ConnectAsync();
try
{
using (var transaction = client.BeginTransaction())
{
await client.Cypher.Match("n").Return(n => n.Count()).ExecuteWithoutResultsAsync();
}
}
catch (Exception ex)
{
Assert.True(ex.Message.Contains("404"));
}
}
}
public async Task UpdateTransactionEndpointAfterFirstRequest()
{
var initTransactionRequest = MockRequest.PostJson("/transaction", @"{
'statements': [{'statement': 'MATCH n\r\nRETURN count(n)', 'resultDataContents':[], 'parameters': {}}]}");
var rollbackTransactionRequest = MockRequest.Delete("/transaction/1");
using (var testHarness = new RestTestHarness
{
{
initTransactionRequest,
MockResponse.Json(201, TransactionRestResponseHelper.GenerateInitTransactionResponse(1), "http://foo/db/data/transaction/1")
},
{
rollbackTransactionRequest, MockResponse.Json(200, @"{'results':[], 'errors':[] }")
}
})
{
var client = await testHarness.CreateAndConnectTransactionalGraphClient();
using (var transaction = client.BeginTransaction())
{
// dummy query to generate request
await client.Cypher
.Match("n")
.Return(n => n.Count())
.ExecuteWithoutResultsAsync();
Assert.Equal(
new Uri("http://foo/db/data/transaction/1"),
((INeo4jTransaction)((TransactionScopeProxy)transaction).TransactionContext).Endpoint);
}
}
}
//https://github.com/Readify/Neo4jClient/issues/127
public async Task ReturnsThe404_WhenVersionIs_2_2_6_Plus_WhenActuallyTimingOut(RestTestHarness.Neo4jVersion version)
{
var initTransactionRequest = MockRequest.PostJson("/transaction", @"{
'statements': [{'statement': 'MATCH n\r\nRETURN count(n)', 'resultDataContents':[], 'parameters': {}}]}");
var rollbackTransactionRequest = MockRequest.Delete("/transaction/1");
using (var testHarness = new RestTestHarness()
{
{
initTransactionRequest,
MockResponse.Json(201, TransactionRestResponseHelper.GenerateInitTransactionResponse(1), "http://foo/db/data/transaction/1")
},
{
rollbackTransactionRequest, MockResponse.Json(404, "{\"results\":[],\"errors\":[{\"code\":\"Neo.ClientError.Transaction.UnknownId\",\"message\":\"Unrecognized transaction id. Transaction may have timed out and been rolled back.\"}]}")
}
})
{
var client = testHarness.CreateGraphClient(version);
await client.ConnectAsync();
try
{
using (var transaction = client.BeginTransaction())
{
await client.Cypher.Match("n").Return(n => n.Count()).ExecuteWithoutResultsAsync();
}
throw new Exception("Should not reach this code, as there is an expected exception.");
}
catch (Exception ex)
{
Assert.True(ex.Message.Contains("404"));
}
}
}
public async Task CommitFailsOnPendingAsyncRequests()
{
const string queryText = @"MATCH (n) RETURN count(n) as Total";
const string resultColumn = @"{'columns':['Total'], 'data':[{'row':[1]}]}";
var cypherQuery = new CypherQuery(queryText, new Dictionary <string, object>(), CypherResultMode.Projection, "neo4j");
var cypherApiQuery = new CypherStatementList {
new CypherTransactionStatement(cypherQuery)
};
using (var testHarness = new RestTestHarness(false)
{
{
MockRequest.PostObjectAsJson("/transaction", cypherApiQuery),
MockResponse.Json(201, TransactionRestResponseHelper.GenerateInitTransactionResponse(1, resultColumn), "http://foo/db/data/transaction/1")
}
})
{
var client = await testHarness.CreateAndConnectTransactionalGraphClient();
var rawClient = (IRawGraphClient)client;
using (var tran = client.BeginTransaction())
{
await rawClient.ExecuteGetCypherResultsAsync <DummyTotal>(cypherQuery);
var ex = await Assert.ThrowsAsync <InvalidOperationException>(async() => await tran.CommitAsync());
Assert.Equal("Cannot commit unless all tasks have been completed", ex.Message);
}
}
}
public async Task RollbackWithoutRequestsShouldNotGenerateMessage()
{
var initTransactionRequest = MockRequest.PostJson("/transaction", @"{'statements': []}");
var rollbackTransactionRequest = MockRequest.Delete("/transaction/1");
using (var testHarness = new RestTestHarness
{
{
initTransactionRequest,
MockResponse.Json(201, TransactionRestResponseHelper.GenerateInitTransactionResponse(1), "http://foo/db/data/transaction/1")
},
{
rollbackTransactionRequest, MockResponse.Json(200, @"{'results':[], 'errors':[] }")
}
}.ShouldNotBeCalled(initTransactionRequest, rollbackTransactionRequest))
{
var client = await testHarness.CreateAndConnectTransactionalGraphClient();
using (var transaction = client.BeginTransaction())
{
// no requests
await transaction.RollbackAsync();
}
}
}
public async Task ExecuteAsyncRequestInTransaction()
{
const string queryText = @"MATCH (n) RETURN count(n) as Total";
const string resultColumn = @"{'columns':['Total'], 'data':[{'row':[1]}]}";
var cypherQuery = new CypherQuery(queryText, new Dictionary <string, object>(), CypherResultMode.Projection, "neo4j");
var cypherApiQuery = new CypherStatementList {
new CypherTransactionStatement(cypherQuery)
};
var commitRequest = MockRequest.PostJson("/transaction/1/commit", @"{'statements': []}");
using (var testHarness = new RestTestHarness
{
{
MockRequest.PostObjectAsJson("/transaction", cypherApiQuery),
MockResponse.Json(201, TransactionRestResponseHelper.GenerateInitTransactionResponse(1, resultColumn), "http://foo/db/data/transaction/1")
},
{
commitRequest, MockResponse.Json(200, @"{'results':[], 'errors':[] }")
}
})
{
var client = await testHarness.CreateAndConnectTransactionalGraphClient();
var rawClient = (IRawGraphClient)client;
using (var tran = client.BeginTransaction())
{
var totalObj = rawClient.ExecuteGetCypherResultsAsync <DummyTotal>(cypherQuery).Result.Single();
Assert.Equal(1, totalObj.Total);
await tran.CommitAsync();
}
}
}
public async Task TransactionCommit()
{
var initTransactionRequest = MockRequest.PostJson("/transaction", @"{
'statements': [{'statement': 'MATCH n\r\nRETURN count(n)', 'resultDataContents':[], 'parameters': {}}]}");
var commitRequest = MockRequest.PostJson("/transaction/1/commit", @"{'statements': []}");
using (var testHarness = new RestTestHarness
{
{
initTransactionRequest,
MockResponse.Json(201, TransactionRestResponseHelper.GenerateInitTransactionResponse(1), "http://foo/db/data/transaction/1")
},
{
commitRequest, MockResponse.Json(200, @"{'results':[], 'errors':[] }")
}
})
{
var client = await testHarness.CreateAndConnectTransactionalGraphClient();
using (var transaction = client.BeginTransaction())
{
// dummy query to generate request
await client.Cypher
.Match("n")
.Return(n => n.Count())
.ExecuteWithoutResultsAsync();
await transaction.CommitAsync();
}
}
}
public async Task UsesTheSetDatabase()
{
const string database = "neo4jclient";
var initTransactionRequest = MockRequest.PostJson($"/db/{database}/tx", "{'statements': [{'statement': 'MATCH n\r\nRETURN count(n)', 'resultDataContents':[], 'parameters': {}}]}");
var rollbackTransactionRequest = MockRequest.Delete($"/db/{database}/tx/1");
var commitTransactionRequest = MockRequest.PostJson($"/db/{database}/tx/1/commit", EmptyStatements);
var keepAliveTransactionRequest = MockRequest.PostJson($"/db/{database}/tx/1", EmptyStatements);
using (var testHarness = new RestTestHarness(false, "http://foo:7474")
{
{
initTransactionRequest,
MockResponse.Json(201, TransactionRestResponseHelper.GenerateInitTransactionResponse(1), $"http://foo:7474/db/{database}/tx/1")
},
{ commitTransactionRequest, EmptyOkResponse },
{ rollbackTransactionRequest, EmptyOkResponse },
{ keepAliveTransactionRequest, EmptyOkResponse }
})
{
var client = await testHarness.CreateAndConnectTransactionalGraphClient(RestTestHarness.Neo4jVersion.Neo40);
using (var transaction = client.BeginTransaction(TransactionScopeOption.Join, null, database))
{
// dummy query to generate request
await client.Cypher
.Match("n")
.Return(n => n.Count())
.ExecuteWithoutResultsAsync().ConfigureAwait(false);
await transaction.KeepAliveAsync();
}
}
}
public async Task UsesTheDefaultDatabase_WhenNoneSet()
{
const string database = "neo4j";
var initTransactionRequest = MockRequest.PostJson($"/db/{database}/tx", "{'statements': [{'statement': 'MATCH n\r\nRETURN count(n)', 'resultDataContents':[], 'parameters': {}}]}");
var commitTransactionRequest = MockRequest.PostJson($"/db/{database}/tx/1/commit", EmptyStatements);
using (var testHarness = new RestTestHarness(false, "http://foo:7474")
{
{
initTransactionRequest,
MockResponse.Json(201, TransactionRestResponseHelper.GenerateInitTransactionResponse(1), $"http://foo:7474/db/{database}/tx/1")
},
{ commitTransactionRequest, EmptyOkResponse }
})
{
var client = await testHarness.CreateAndConnectTransactionalGraphClient(RestTestHarness.Neo4jVersion.Neo40);
using (var transaction = client.BeginTransaction())
{
// dummy query to generate request
await client.Cypher
.Match("n")
.Return(n => n.Count())
.ExecuteWithoutResultsAsync().ConfigureAwait(false);
await transaction.CommitAsync().ConfigureAwait(false);
var ex = await Assert.ThrowsAsync <ClosedTransactionException>(async() => await transaction.CommitAsync());
ex.Should().NotBeNull();
}
}
}
public async Task QueryInTransaction_ThrowsExceptionWhen_ExecutingCypherQueryAgainstADifferentDatabaseName()
{
const string database = "neo4jclient";
var initTransactionRequest = MockRequest.PostJson($"/db/{database}/tx", "{'statements': [{'statement': 'MATCH n\r\nRETURN count(n)', 'resultDataContents':[], 'parameters': {}}]}");
var commitTransactionRequest = MockRequest.PostJson($"/db/{database}/tx/1/commit", EmptyStatements);
using (var testHarness = new RestTestHarness(false, "http://foo:7474")
{
{
initTransactionRequest,
MockResponse.Json(201, TransactionRestResponseHelper.GenerateInitTransactionResponse(1), $"http://foo:7474/db/{database}/tx/1")
},
{ commitTransactionRequest, EmptyOkResponse }
})
{
var client = await testHarness.CreateAndConnectTransactionalGraphClient(RestTestHarness.Neo4jVersion.Neo40);
using (var transaction = client.BeginTransaction(TransactionScopeOption.Join, null, database))
{
// dummy query to generate request
var ex = Assert.Throws <InvalidOperationException>(
() => client.Cypher
.WithDatabase("neo4j")
.Match("n")
.Return(n => n.Count()));
ex.Should().NotBeNull();
}
}
}
public async Task DeserializeResultsFromTransaction()
{
var initTransactionRequest = MockRequest.PostJson("/transaction", @"{
'statements': [{'statement': 'MATCH n\r\nRETURN count(n)', 'resultDataContents':[], 'parameters': {}}]}");
var deserializationRequest = MockRequest.PostJson("/transaction/1", @"{
'statements': [{'statement': 'MATCH n\r\nRETURN count(n)', 'resultDataContents':[], 'parameters': {}}]}");
var rollbackTransactionRequest = MockRequest.Delete("/transaction/1");
using (var testHarness = new RestTestHarness
{
{
initTransactionRequest,
MockResponse.Json(201, TransactionRestResponseHelper.GenerateInitTransactionResponse(1), "http://foo/db/data/transaction/1")
},
{
deserializationRequest,
MockResponse.Json(200, @"{'results':[{'columns': ['count(n)'], 'data': [{'row': [0]}]}]}")
},
{
rollbackTransactionRequest, MockResponse.Json(200, @"{'results':[], 'errors':[] }")
}
})
{
var client = await testHarness.CreateAndConnectTransactionalGraphClient();
using (var transaction = client.BeginTransaction())
{
// dummy query to generate request
await client.Cypher
.Match("n")
.Return(n => n.Count())
.ExecuteWithoutResultsAsync();
// this query will hit the deserializer
var count = await client.Cypher
.Match("n")
.Return(n => n.Count())
.ResultsAsync;
Assert.Equal(count.First(), 0);
}
}
}
public async Task AsyncRequestsInTransactionShouldBeExecutedInOrder()
{
const string queryTextBase = @"MATCH (n) RETURN {0} as Total";
const string resultColumnBase = @"{{'columns':['Total'], 'data':[{{'row':[{0}]}}]}}";
const int asyncRequests = 15;
var queries = new CypherQuery[asyncRequests];
var apiQueries = new CypherStatementList[asyncRequests];
var responses = new MockResponse[asyncRequests];
var testHarness = new RestHarnessWithCounter();
for (int i = 0; i < asyncRequests; i++)
{
queries[i] = new CypherQuery(string.Format(queryTextBase, i), new Dictionary <string, object>(),
CypherResultMode.Projection, "neo4j");
apiQueries[i] = new CypherStatementList {
new CypherTransactionStatement(queries[i])
};
responses[i] = MockResponse.Json(200,
@"{'results':[" + string.Format(resultColumnBase, i) + @"], 'errors':[] }");
if (i > 0)
{
testHarness.Add(MockRequest.PostObjectAsJson("/transaction/1", apiQueries[i]), responses[i]);
}
}
testHarness.Add(
MockRequest.PostObjectAsJson("/transaction", apiQueries[0]),
MockResponse.Json(201, TransactionRestResponseHelper.GenerateInitTransactionResponse(1, string.Format(resultColumnBase, 0)),
"http://foo/db/data/transaction/1")
);
testHarness.Add(
MockRequest.PostJson("/transaction/1/commit", @"{'statements': []}"),
MockResponse.Json(200, @"{'results':[], 'errors':[] }")
);
try
{
var client = await testHarness.CreateAndConnectTransactionalGraphClient();
var rawClient = (IRawGraphClient)client;
var tasks = new Task[asyncRequests];
using (var tran = client.BeginTransaction())
{
for (int i = 0; i < asyncRequests; i++)
{
int tmpResult = i;
tasks[i] = rawClient.ExecuteGetCypherResultsAsync <DummyTotal>(queries[i]).ContinueWith(task =>
{
Assert.Equal(tmpResult, task.Result.Single().Total);
});
}
await Task.WhenAll(tasks);
await tran.CommitAsync();
}
}
finally
{
testHarness.Dispose();
}
// check that we have a total order
Assert.Equal(asyncRequests, testHarness.Queue.Count);
int lastElement = -1;
for (int i = 0; i < asyncRequests; i++)
{
int headItem;
Assert.True(testHarness.Queue.TryDequeue(out headItem));
headItem.Should().BeGreaterThan(lastElement);
lastElement = headItem;
}
}
