1 files changed, 82 insertions, 0 deletions
diff --git a/tests/unit/serve_test.ts b/tests/unit/serve_test.ts
index 827a094dc..ea5a7d3ef 100644
--- a/tests/unit/serve_test.ts
+++ b/tests/unit/serve_test.ts
@@ -861,6 +861,88 @@ Deno.test(
   },
 );
 
+Deno.test({ permissions: { net: true } }, async function validPortString() {
+  const server = Deno.serve({
+    handler: (_request) => new Response(),
+    port: "4501" as unknown as number,
+  });
+  assertEquals(server.addr.transport, "tcp");
+  assertEquals(server.addr.port, 4501);
+  await server.shutdown();
+});
+
+Deno.test({ permissions: { net: true } }, function invalidPortFloat() {
+  assertThrows(
+    () =>
+      Deno.serve({
+        handler: (_request) => new Response(),
+        port: 45.1,
+      }),
+    TypeError,
+    `Invalid port: 45.1`,
+  );
+});
+
+Deno.test({ permissions: { net: true } }, function invalidPortNaN() {
+  assertThrows(
+    () =>
+      Deno.serve({
+        handler: (_request) => new Response(),
+        port: NaN,
+      }),
+    TypeError,
+    `Invalid port: NaN`,
+  );
+});
+
+Deno.test({ permissions: { net: true } }, function invalidPortString() {
+  assertThrows(
+    () =>
+      Deno.serve({
+        handler: (_request) => new Response(),
+        port: "some-non-number-string" as unknown as number,
+      }),
+    TypeError,
+    `Invalid port: 'some-non-number-string'`,
+  );
+});
+
+Deno.test({ permissions: { net: true } }, function invalidPortTooSmall() {
+  assertThrows(
+    () =>
+      Deno.serve({
+        handler: (_request) => new Response(),
+        port: -111,
+      }),
+    RangeError,
+    `Invalid port (out of range): -111`,
+  );
+});
+
+Deno.test({ permissions: { net: true } }, function invalidPortTooLarge() {
+  assertThrows(
+    () =>
+      Deno.serve({
+        handler: (_request) => new Response(),
+        port: 100000,
+      }),
+    RangeError,
+    `Invalid port (out of range): 100000`,
+  );
+});
+
+Deno.test({ permissions: { net: true } }, function invalidPortType() {
+  assertThrows(
+    () =>
+      Deno.serve({
+        handler: (_request) => new Response(),
+        port: true as unknown as number,
+      }),
+    TypeError,
+    `Invalid port (expected number): true`,
+  );
+});
+
 function createUrlTest(
   name: string,
   methodAndPath: string,