Add TestTaskGroupSynthetic.py

Author: kastiglione

lldb/test/API/lang/swift/async/taskgroups/Makefile

@@ -0,0 +1,3 @@
+SWIFT_SOURCES := main.swift
+SWIFTFLAGS_EXTRAS := -parse-as-library
+include Makefile.rules

lldb/test/API/lang/swift/async/taskgroups/TestTaskGroupSynthetic.py

@@ -0,0 +1,26 @@
+import lldb
+from lldbsuite.test.decorators import *
+from lldbsuite.test.lldbtest import *
+from lldbsuite.test import lldbutil
+
+
+class TestCase(TestBase):
+
+    @swiftTest
+    def test(self):
+        """Print a TaskGroup and verify its children."""
+        self.build()
+        lldbutil.run_to_source_breakpoint(
+            self, "break here", lldb.SBFileSpec("main.swift")
+        )
+        self.expect(
+            "v group",
+            substrs=[
+                "[0] = {",
+                "isGroupChildTask = true",
+                "[1] = {",
+                "isGroupChildTask = true",
+                "[2] = {",
+                "isGroupChildTask = true",
+            ],
+        )

lldb/test/API/lang/swift/async/taskgroups/main.swift

@@ -0,0 +1,14 @@
+@main struct Main {
+    static func main() async {
+        await withTaskGroup { group in
+            for _ in 0..<3 {
+                group.addTask {
+                    try? await Task.sleep(for: .seconds(300))
+                }
+            }
+
+            print("break here")
+            for await _ in group {}
+        }
+    }
+}