1 files changed, 7 insertions, 0 deletions
diff --git a/cli/tests/subdir/type_and_code.ts b/cli/tests/subdir/type_and_code.ts
new file mode 100644
index 000000000..b14713419
--- /dev/null
+++ b/cli/tests/subdir/type_and_code.ts
@@ -0,0 +1,7 @@
+export interface AnInterface {
+  a: string;
+}
+
+export function isAnInterface(value: unknown): value is AnInterface {
+  return value && typeof value === "object" && "a" in value;
+}