test: Add tests to verify 'main' overrides 'request'’s default 'baseU…

…rl' only when 'GITHUB_API_URL' is set

package.json

@@ -18,9 +18,16 @@
     "ava": "^5.3.1",
     "dotenv": "^16.3.1",
     "esbuild": "^0.19.4",
+    "esmock": "^2.5.1",
     "execa": "^8.0.1",
     "undici": "^5.25.2"
   },
+  "ava": {
+    "nodeArguments": [
+      "--no-warnings=ExperimentalWarning",
+      "--loader=esmock"
+    ]
+  },
   "release": {
     "branches": [
       "+([0-9]).x",
@@ -44,4 +51,4 @@
       ]
     ]
   }
-}
+}

tests/index.js

@@ -1,13 +1,24 @@
-import { readdirSync } from "node:fs";
+import { readFileSync, readdirSync } from "node:fs";
+import * as url from "node:url";
 
 import { execa } from "execa";
 import test from "ava";
 
+// If ava is configured to use node arguments, use them when this script runs node
+const nodeArguments =
+  readFileSync(
+    url.fileURLToPath(new URL("../package.json", import.meta.url)),
+    "utf8"
+  )?.ava?.nodeArguments ?? [];
+
 const tests = readdirSync("tests").filter((file) => file.endsWith(".test.js"));
 
 for (const file of tests) {
   test(file, async (t) => {
-    const { stderr, stdout } = await execa("node", [`tests/${file}`]);
+    const { stderr, stdout } = await execa("node", [
+      ...nodeArguments,
+      `tests/${file}`,
+    ]);
     t.snapshot(stderr, "stderr");
     t.snapshot(stdout, "stdout");
   });

tests/main-request-with-baseurl.test.js

@@ -0,0 +1,30 @@
+// Verify `main` overrides `request`’s default `baseUrl` when `GITHUB_API_URL` is set.
+// @ts-check
+
+import esmock from "esmock";
+
+process.env.GITHUB_REPOSITORY = "actions/create-github-app-token";
+process.env.GITHUB_API_URL = "https://github.acme-inc.com/api/v3";
+
+// inputs are set as environment variables with the prefix INPUT_
+// https://docs.github.com/en/actions/creating-actions/metadata-syntax-for-github-actions#example-specifying-inputs
+process.env.INPUT_APP_ID = "123456";
+process.env.INPUT_PRIVATE_KEY = `-----BEGIN RSA PRIVATE KEY-----
+ABC/def/123==
+-----END RSA PRIVATE KEY-----`;
+
+await esmock("../main.js", {
+  "../lib/main.js": {
+    main: async (
+      _appId,
+      _privateKey,
+      _repository,
+      _core,
+      _createAppAuth,
+      request
+    ) => {
+      console.log(request.endpoint.DEFAULTS.baseUrl);
+      console.log(request.endpoint.DEFAULTS.headers["user-agent"]);
+    },
+  },
+});

tests/main-request-without-baseurl.test.js

@@ -0,0 +1,30 @@
+// Verify `main` doesn’t override `request`’s default `baseUrl` when `GITHUB_API_URL` isn’t set.
+// @ts-check
+
+import esmock from "esmock";
+
+process.env.GITHUB_REPOSITORY = "actions/create-github-app-token";
+delete process.env.GITHUB_API_URL;
+
+// inputs are set as environment variables with the prefix INPUT_
+// https://docs.github.com/en/actions/creating-actions/metadata-syntax-for-github-actions#example-specifying-inputs
+process.env.INPUT_APP_ID = "123456";
+process.env.INPUT_PRIVATE_KEY = `-----BEGIN RSA PRIVATE KEY-----
+ABC/def/123==
+-----END RSA PRIVATE KEY-----`;
+
+await esmock("../main.js", {
+  "../lib/main.js": {
+    main: async (
+      _appId,
+      _privateKey,
+      _repository,
+      _core,
+      _createAppAuth,
+      request
+    ) => {
+      console.log(request.endpoint.DEFAULTS.baseUrl);
+      console.log(request.endpoint.DEFAULTS.headers["user-agent"]);
+    },
+  },
+});

tests/snapshots/index.js.md

@@ -14,6 +14,28 @@ Generated by [AVA](https://avajs.dev).
 
     ''
 
+## main-request-with-baseurl.test.js
+
+> stderr
+
+    ''
+
+> stdout
+
+    `https://github.acme-inc.com/api/v3␊
+    actions/create-github-app-token`
+
+## main-request-without-baseurl.test.js
+
+> stderr
+
+    ''
+
+> stdout
+
+    `https://api.github.com␊
+    actions/create-github-app-token`
+
 ## post-token-set.test.js
 
 > stderr