fix(std/examples): add tests for examples (#4094)

1 files changed, 41 insertions, 0 deletions

diff --git a/std/examples/tests/curl_test.ts b/std/examples/tests/curl_test.ts
new file mode 100644
index 000000000..71a0fe67f
--- /dev/null
+++ b/std/examples/tests/curl_test.ts
@@ -0,0 +1,41 @@
+// Copyright 2018-2020 the Deno authors. All rights reserved. MIT license.
+import { Server, serve } from "../../http/server.ts";
+import { assertStrictEq } from "../../testing/asserts.ts";
+
+let server: Server | undefined;
+
+async function startTestServer(): Promise<void> {
+  server = await serve({ port: 8080 });
+  (async (): Promise<void> => {
+    for await (const req of server) {
+      req.respond({ body: "Hello world" });
+    }
+  })();
+}
+
+Deno.test("[examples/curl] beforeAll", async () => {
+  await startTestServer();
+});
+
+Deno.test("[examples/curl] send a request to a specified url", async () => {
+  const decoder = new TextDecoder();
+  const process = Deno.run({
+    args: [Deno.execPath(), "--allow-net", "curl.ts", "http://localhost:8080"],
+    cwd: "examples",
+    stdout: "piped"
+  });
+
+  try {
+    const output = await Deno.readAll(process.stdout!);
+    const actual = decoder.decode(output).trim();
+    const expected = "Hello world";
+
+    assertStrictEq(actual, expected);
+  } finally {
+    process.close();
+  }
+});
+
+Deno.test("[examples/curl] afterAll", () => {
+  server?.close();
+});