1 files changed, 78 insertions, 0 deletions
diff --git a/jstests/noPassthrough/arrayFilters_feature_compatibility_version.js b/jstests/noPassthrough/arrayFilters_feature_compatibility_version.js
new file mode 100644
index 00000000000..6877bc12c30
--- /dev/null
+++ b/jstests/noPassthrough/arrayFilters_feature_compatibility_version.js
@@ -0,0 +1,78 @@
+// Test that arrayFilters usage is restricted when the featureCompatibilityVersion is 3.4.
+
+(function() {
+    "use strict";
+
+    const conn = MongoRunner.runMongod({});
+    assert.neq(null, conn, "mongod was unable to start up");
+
+    let testDB = conn.getDB("arrayFilters_feature_compatibility_version");
+    assert.commandWorked(testDB.dropDatabase());
+    let coll = testDB.coll;
+
+    let adminDB = conn.getDB("admin");
+
+    let res;
+
+    //
+    // arrayFilters is not permitted when the featureCompatibilityVersion is 3.4.
+    //
+
+    assert.commandWorked(adminDB.runCommand({setFeatureCompatibilityVersion: "3.4"}));
+    res = adminDB.runCommand({getParameter: 1, featureCompatibilityVersion: 1});
+    assert.commandWorked(res);
+    assert.eq("3.4", res.featureCompatibilityVersion);
+
+    // Update.
+    res = coll.update({_id: 0}, {$set: {"a.$[i]": 5}}, {arrayFilters: [{i: 0}]});
+    assert.writeError(res, ErrorCodes.InvalidOptions);
+    assert.neq(
+        -1,
+        res.getWriteError().errmsg.indexOf(
+            "The featureCompatibilityVersion must be 3.6 to use arrayFilters. See http://dochub.mongodb.org/core/3.6-feature-compatibility."),
+        "update failed for a reason other than featureCompatibilityVersion");
+
+    // FindAndModify.
+    assert.throws(function() {
+        coll.findAndModify(
+            {query: {_id: 0}, update: {$set: {"a.$[i]": 5}}, arrayFilters: [{i: 0}]});
+    });
+
+    // Update explain.
+    assert.throws(function() {
+        coll.explain().update({_id: 0}, {$set: {"a.$[i]": 5}}, {arrayFilters: [{i: 0}]});
+    });
+
+    // FindAndModify explain.
+    assert.throws(function() {
+        coll.explain().findAndModify(
+            {query: {_id: 0}, update: {$set: {"a.$[i]": 5}}, arrayFilters: [{i: 0}]});
+    });
+
+    //
+    // arrayFilters is permitted when the featureCompatibilityVersion is 3.6.
+    //
+
+    assert.commandWorked(adminDB.runCommand({setFeatureCompatibilityVersion: "3.6"}));
+    res = adminDB.runCommand({getParameter: 1, featureCompatibilityVersion: 1});
+    assert.commandWorked(res);
+    assert.eq("3.6", res.featureCompatibilityVersion);
+
+    // Update.
+    assert.writeOK(coll.update({_id: 0}, {$set: {"a.$[i]": 5}}, {arrayFilters: [{i: 0}]}));
+
+    // FindAndModify.
+    assert.eq(null,
+              coll.findAndModify(
+                  {query: {_id: 0}, update: {$set: {"a.$[i]": 5}}, arrayFilters: [{i: 0}]}));
+
+    // Update explain.
+    assert.commandWorked(
+        coll.explain().update({_id: 0}, {$set: {"a.$[i]": 5}}, {arrayFilters: [{i: 0}]}));
+
+    // FindAndModify explain.
+    assert.commandWorked(coll.explain().findAndModify(
+        {query: {_id: 0}, update: {$set: {"a.$[i]": 5}}, arrayFilters: [{i: 0}]}));
+
+    MongoRunner.stopMongod(conn);
+}());