+// subagentTestLastItem returns the last input item of call.
+func subagentTestLastItem(call ModelFakeCall) map[string]any {
+ input := call.body["input"].([]any)
+
+ return input[len(input)-1].(map[string]any)
+}
+
+// subagentTestCall tells if call is a call of a subagent.
+func subagentTestCall(call ModelFakeCall) bool {
+ instructions, _ := call.body["instructions"].(string)
+
+ return strings.HasPrefix(instructions, "You are a subagent")
+}
+
+// subagentTestText returns the text of the user message item, or "" for another
+// item.
+func subagentTestText(item map[string]any) string {
+ content, _ := item["content"].([]any)
+
+ var text strings.Builder
+
+ for _, part := range content {
+ value, _ := part.(map[string]any)["text"].(string)
+ text.WriteString(value)
+ }
+
+ return text.String()
+}
+