Move exports/subpath imports (uses exec) and project file tests (use shared glob) into separate test files for better parallelization.

test/markdownlint-test-project.mjs

@@ -0,0 +1,56 @@
+// @ts-check
+
+import { createRequire } from "node:module";
+const require = createRequire(import.meta.url);
+import test from "ava";
+import { globby } from "globby";
+import { lint as lintPromise } from "markdownlint/promise";
+
+const projectFiles = [
+  "*.md",
+  "doc/*.md",
+  "helpers/*.md",
+  "micromark/*.md",
+  "schema/*.md"
+];
+const files = await globby(projectFiles);
+
+test("projectFiles", (t) => {
+  t.plan(2);
+  t.is(files.length, 60);
+  const options = {
+    files,
+    "config": require("../.markdownlint.json")
+  };
+  return lintPromise(options).then((actual) => {
+    const expected = {};
+    for (const file of files) {
+      expected[file] = [];
+    }
+    t.deepEqual(actual, expected, "Issue(s) with project files.");
+  });
+});
+
+test("projectFilesExtendedAscii", (t) => {
+  t.plan(2);
+  const ignoreFiles = new Set([
+    "doc/Rules.md",
+    "doc/md010.md",
+    "doc/md026.md",
+    "doc/md036.md"
+  ]);
+  const filteredFiles = files.filter((file) => !ignoreFiles.has(file));
+  t.is(filteredFiles.length, 56);
+  const options = {
+    "files": filteredFiles,
+    "config": require("../.markdownlint.json"),
+    "customRules": [ require("markdownlint-rule-extended-ascii") ]
+  };
+  return lintPromise(options).then((actual) => {
+    const expected = {};
+    for (const file of filteredFiles) {
+      expected[file] = [];
+    }
+    t.deepEqual(actual, expected, "Issue(s) with project files.");
+  });
+});