SERVER-40432 Undo 4.2 changes to $out

1 files changed, 130 insertions, 0 deletions

diff --git a/src/mongo/db/pipeline/process_interface_standalone_test.cpp b/src/mongo/db/pipeline/process_interface_standalone_test.cpp
new file mode 100644
index 00000000000..fa246fc2e9d
--- /dev/null
+++ b/src/mongo/db/pipeline/process_interface_standalone_test.cpp
@@ -0,0 +1,130 @@
+/**
+ *    Copyright (C) 2019-present MongoDB, Inc.
+ *
+ *    This program is free software: you can redistribute it and/or modify
+ *    it under the terms of the Server Side Public License, version 1,
+ *    as published by MongoDB, Inc.
+ *
+ *    This program is distributed in the hope that it will be useful,
+ *    but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *    Server Side Public License for more details.
+ *
+ *    You should have received a copy of the Server Side Public License
+ *    along with this program. If not, see
+ *    <http://www.mongodb.com/licensing/server-side-public-license>.
+ *
+ *    As a special exception, the copyright holders give permission to link the
+ *    code of portions of this program with the OpenSSL library under certain
+ *    conditions as described in each individual source file and distribute
+ *    linked combinations including the program with the OpenSSL library. You
+ *    must comply with the Server Side Public License in all respects for
+ *    all of the code used other than as permitted herein. If you modify file(s)
+ *    with this exception, you may extend this exception to your version of the
+ *    file(s), but you are not obligated to do so. If you do not wish to do so,
+ *    delete this exception statement from your version. If you delete this
+ *    exception statement from all source files in the program, then also delete
+ *    it in the license file.
+ */
+
+#include "mongo/platform/basic.h"
+
+#include "mongo/db/pipeline/aggregation_context_fixture.h"
+#include "mongo/db/pipeline/process_interface_standalone.h"
+#include "mongo/unittest/unittest.h"
+
+namespace mongo {
+namespace {
+
+class MongoProcessInterfaceForTest : public MongoInterfaceStandalone {
+public:
+    using MongoInterfaceStandalone::MongoInterfaceStandalone;
+
+    bool fieldsHaveSupportingUniqueIndex(const boost::intrusive_ptr<ExpressionContext>& expCtx,
+                                         const NamespaceString& nss,
+                                         const std::set<FieldPath>& fields) const override {
+        return hasSupportingIndexForFields;
+    }
+
+    void checkRoutingInfoEpochOrThrow(const boost::intrusive_ptr<ExpressionContext>& expCtx,
+                                      const NamespaceString&,
+                                      ChunkVersion) const override {
+        // Assume it always matches for our tests here.
+        return;
+    }
+
+    bool hasSupportingIndexForFields{true};
+};
+
+class ProcessInterfaceStandaloneTest : public AggregationContextFixture {
+public:
+    auto makeProcessInterface() {
+        return std::make_unique<MongoProcessInterfaceForTest>(getExpCtx()->opCtx);
+    }
+};
+
+TEST_F(ProcessInterfaceStandaloneTest, FailsToEnsureFieldsUniqueIfFieldsHaveDuplicates) {
+    auto expCtx = getExpCtx();
+    auto targetCollectionVersion = boost::none;
+    auto processInterface = makeProcessInterface();
+
+    ASSERT_THROWS_CODE(processInterface->ensureFieldsUniqueOrResolveDocumentKey(
+                           expCtx, {{"_id", "_id"}}, targetCollectionVersion, expCtx->ns),
+                       AssertionException,
+                       ErrorCodes::BadValue);
+    ASSERT_THROWS_CODE(processInterface->ensureFieldsUniqueOrResolveDocumentKey(
+                           expCtx, {{"x", "y", "x"}}, targetCollectionVersion, expCtx->ns),
+                       AssertionException,
+                       ErrorCodes::BadValue);
+}
+
+TEST_F(ProcessInterfaceStandaloneTest,
+       FailsToEnsureFieldsUniqueIfTargetCollectionVersionIsSpecifiedOnMongos) {
+    auto expCtx = getExpCtx();
+    auto targetCollectionVersion = boost::make_optional(ChunkVersion(0, 0, OID::gen()));
+    auto processInterface = makeProcessInterface();
+
+    // Test that 'targetCollectionVersion' is not accepted if not from mongos.
+    expCtx->fromMongos = false;
+    ASSERT_THROWS_CODE(processInterface->ensureFieldsUniqueOrResolveDocumentKey(
+                           expCtx, {{"_id"}}, targetCollectionVersion, expCtx->ns),
+                       AssertionException,
+                       51123);
+
+    // Test that 'targetCollectionVersion' is accepted if from mongos.
+    expCtx->fromMongos = true;
+    auto[joinKey, chunkVersion] = processInterface->ensureFieldsUniqueOrResolveDocumentKey(
+        expCtx, {{"_id"}}, targetCollectionVersion, expCtx->ns);
+    ASSERT_EQ(joinKey.size(), 1UL);
+    ASSERT_EQ(joinKey.count(FieldPath("_id")), 1UL);
+    ASSERT(chunkVersion);
+    ASSERT_EQ(*chunkVersion, *targetCollectionVersion);
+}
+
+TEST_F(ProcessInterfaceStandaloneTest, FailsToEnsureFieldsUniqueIfJoinFieldsAreNotSentFromMongos) {
+    auto expCtx = getExpCtx();
+    auto targetCollectionVersion = boost::make_optional(ChunkVersion(0, 0, OID::gen()));
+    auto processInterface = makeProcessInterface();
+
+    expCtx->fromMongos = true;
+    ASSERT_THROWS_CODE(processInterface->ensureFieldsUniqueOrResolveDocumentKey(
+                           expCtx, boost::none, targetCollectionVersion, expCtx->ns),
+                       AssertionException,
+                       51124);
+}
+
+TEST_F(ProcessInterfaceStandaloneTest,
+       FailsToEnsureFieldsUniqueIfFieldsDoesNotHaveSupportingUniqueIndex) {
+    auto expCtx = getExpCtx();
+    auto targetCollectionVersion = boost::none;
+    auto processInterface = makeProcessInterface();
+
+    expCtx->fromMongos = false;
+    processInterface->hasSupportingIndexForFields = false;
+    ASSERT_THROWS_CODE(processInterface->ensureFieldsUniqueOrResolveDocumentKey(
+                           expCtx, {{"x"}}, targetCollectionVersion, expCtx->ns),
+                       AssertionException,
+                       51183);
+}
+}  // namespace
+}  // namespace mongo