Test bundled cosmiconfig (#8262)

tests_integration/__tests__/third-party.js

@@ -0,0 +1,53 @@
+"use strict";
+
+const path = require("path");
+const { thirdParty } = require("../env");
+const { cosmiconfig, cosmiconfigSync } = require(thirdParty);
+
+// This don't has to be the same result as `prettier.resolveConfig`,
+// Because we are testing with default `cosmiconfigOptions`
+describe("cosmiconfig", () => {
+  const configs = [
+    {
+      title: "prettier.config.js",
+      dirname: path.join(__dirname, "../cli/config/js/"),
+      file: path.join(__dirname, "../cli/config/js/prettier.config.js"),
+      value: {
+        endOfLine: "auto",
+        tabWidth: 8,
+      },
+    },
+    {
+      title: "package.json",
+      dirname: path.join(__dirname, "../cli/config/package/"),
+      file: path.join(__dirname, "../cli/config/package/package.json"),
+      value: {
+        tabWidth: 3,
+        overrides: [
+          {
+            files: "*.ts",
+            options: {
+              tabWidth: 5,
+            },
+          },
+        ],
+      },
+    },
+  ];
+
+  for (const { title, dirname, file, value } of configs) {
+    test(`async version ${title}`, async () => {
+      const { config, filepath } = await cosmiconfig("prettier").search(
+        dirname
+      );
+      expect(config).toEqual(value);
+      expect(filepath).toBe(file);
+    });
+
+    test(`sync version ${title}`, () => {
+      const { config, filepath } = cosmiconfigSync("prettier").search(dirname);
+      expect(config).toEqual(value);
+      expect(filepath).toBe(file);
+    });
+  }
+});