1 files changed, 15 insertions, 0 deletions
diff --git a/cli/tests/unit/os_test.ts b/cli/tests/unit/os_test.ts
index 9a2d33f53..5786ad32e 100644
--- a/cli/tests/unit/os_test.ts
+++ b/cli/tests/unit/os_test.ts
@@ -27,6 +27,21 @@ unitTest({ perms: { env: true } }, function deleteEnv(): void {
   assertEquals(Deno.env.get("TEST_VAR"), undefined);
 });
 
+unitTest({ perms: { env: true } }, function avoidEmptyNamedEnv(): void {
+  assertThrows(() => Deno.env.set("", "v"), TypeError);
+  assertThrows(() => Deno.env.set("a=a", "v"), TypeError);
+  assertThrows(() => Deno.env.set("a\0a", "v"), TypeError);
+  assertThrows(() => Deno.env.set("TEST_VAR", "v\0v"), TypeError);
+
+  assertThrows(() => Deno.env.get(""), TypeError);
+  assertThrows(() => Deno.env.get("a=a"), TypeError);
+  assertThrows(() => Deno.env.get("a\0a"), TypeError);
+
+  assertThrows(() => Deno.env.delete(""), TypeError);
+  assertThrows(() => Deno.env.delete("a=a"), TypeError);
+  assertThrows(() => Deno.env.delete("a\0a"), TypeError);
+});
+
 unitTest(function envPermissionDenied1(): void {
   assertThrows(() => {
     Deno.env.toObject();