1 files changed, 40 insertions, 0 deletions
diff --git a/jstests/noPassthrough/self_case_insensitive.js b/jstests/noPassthrough/self_case_insensitive.js
new file mode 100644
index 00000000000..b376b90f83e
--- /dev/null
+++ b/jstests/noPassthrough/self_case_insensitive.js
@@ -0,0 +1,40 @@
+/**
+ * Tests that replSetInitiate and replSetReconfig ignore hostname case.
+ *
+ * @tags: [requires_replication]
+ */
+
+(function() {
+    "use strict";
+
+    const rst = new ReplSetTest({nodes: 2});
+    rst.startSet();
+
+    jsTestLog("replSetInitiate with uppercase hostname");
+
+    let conf = rst.getReplSetConfig();
+    conf.members[0].host = conf.members[0].host.toUpperCase();
+
+    rst.initiate(conf);
+
+    const dbName = "test";
+    const collName = "test";
+    const primary = rst.getPrimary();
+    const testColl = primary.getDB(dbName).getCollection(collName);
+    const doc = {a: 1};
+
+    assert.commandWorked(testColl.insert(doc, {writeConcern: {w: 2}}));
+
+    jsTestLog("replSetReconfig with uppercase hostname");
+
+    let secondary2 = MongoRunner.runMongod({replSet: rst.name});
+    conf = rst.getReplSetConfigFromNode();
+    conf.version++;
+    conf.members.push({_id: 5, host: secondary2.host.toUpperCase()});
+    assert.commandWorked(primary.getDB("admin").runCommand({replSetReconfig: conf}));
+    assert.commandWorked(testColl.insert(doc, {writeConcern: {w: 2}}));
+    assert.commandWorked(testColl.insert(doc, {writeConcern: {w: 3}}));
+
+    MongoRunner.stopMongod(secondary2);
+    rst.stopSet();
+})();