Merge pull request swiftlang#61432 from ahoppen/ahoppen/new-test-case

[CodeComplete] Add test case for swiftlang#57237

Author: ahoppen

test/IDE/complete_tuple_label_in_keypath.swift

@@ -0,0 +1,22 @@
+// RUN: %target-swift-ide-test -code-completion -source-filename %s -code-completion-token=COMPLETE | %FileCheck %s
+
+func foo() -> [(Int, [Int])] {
+    var searchResults: [Int: [Int]] = [:]
+    searchResults
+          .map { $0 }
+          .sorted(by: \.#^COMPLETE^#key)
+}
+
+public extension Sequence {
+    func sorted<T: Comparable>(by keyPath: KeyPath<Element, T>) -> [Element] {
+        return sorted { a, b in
+            return a[keyPath: keyPath] > b[keyPath: keyPath]
+        }
+    }
+}
+
+// CHECK: Begin completions,
+// CHECK-DAG: Pattern/CurrNominal:                key[#Int#];
+// CHECK-DAG: Pattern/CurrNominal:                value[#[Int]#];
+// CHECK: End completions
+