1 files changed, 25 insertions, 0 deletions
diff --git a/cli/tests/unit/ffi_test.ts b/cli/tests/unit/ffi_test.ts
new file mode 100644
index 000000000..ab25df699
--- /dev/null
+++ b/cli/tests/unit/ffi_test.ts
@@ -0,0 +1,25 @@
+// Copyright 2018-2021 the Deno authors. All rights reserved. MIT license.
+
+import { assertThrows, unitTest } from "./test_util.ts";
+
+unitTest(function dlopenInvalidArguments() {
+  const filename = "/usr/lib/libc.so.6";
+  assertThrows(() => {
+    // @ts-expect-error: ForeignFunction cannot be null
+    Deno.dlopen(filename, { malloc: null });
+  }, TypeError);
+  assertThrows(() => {
+    Deno.dlopen(filename, {
+      // @ts-expect-error: invalid NativeType
+      malloc: { parameters: ["a"], result: "b" },
+    });
+  }, TypeError);
+  assertThrows(() => {
+    // @ts-expect-error: DynamicLibrary symbols cannot be null
+    Deno.dlopen(filename, null);
+  }, TypeError);
+  assertThrows(() => {
+    // @ts-expect-error: require 2 arguments
+    Deno.dlopen(filename);
+  }, TypeError);
+});