test: use describe and it

test/validate-config.test.js

@@ -0,0 +1,87 @@
+import assert from "node:assert/strict"
+import { describe, it } from "node:test"
+
+import { ESLint } from "eslint"
+
+const eslint = new ESLint()
+
+describe("ESLint configuration", () => {
+  it("should validate correctly JavaScript files", async () => {
+    const [noErrors] = await eslint.lintFiles(
+      "test/fixtures/javascript-no-errors.js",
+    )
+    const [withErrors] = await eslint.lintFiles(
+      "test/fixtures/javascript-with-errors.js",
+    )
+    assert.strictEqual(
+      noErrors?.errorCount,
+      0,
+      JSON.stringify(noErrors, null, 2),
+    )
+    assert.strictEqual(
+      withErrors?.errorCount,
+      3,
+      JSON.stringify(withErrors, null, 2),
+    )
+  })
+
+  it("should validate correctly TypeScript files", async () => {
+    const [noErrors] = await eslint.lintFiles(
+      "test/fixtures/typescript-no-errors.ts",
+    )
+    const [withErrors] = await eslint.lintFiles(
+      "test/fixtures/javascript-with-errors.js",
+    )
+    assert.strictEqual(
+      noErrors?.errorCount,
+      0,
+      JSON.stringify(noErrors, null, 2),
+    )
+    assert.strictEqual(
+      withErrors?.errorCount,
+      3,
+      JSON.stringify(withErrors, null, 2),
+    )
+  })
+
+  it("should not use deprecated rules", async () => {
+    const [javascriptLintResult] = await eslint.lintFiles(
+      "test/fixtures/javascript-no-errors.js",
+    )
+    const [typescriptLintResult] = await eslint.lintFiles(
+      "test/fixtures/typescript-no-errors.ts",
+    )
+    assert.strictEqual(
+      javascriptLintResult.usedDeprecatedRules.length,
+      0,
+      JSON.stringify(javascriptLintResult, null, 2),
+    )
+    assert.strictEqual(
+      typescriptLintResult.usedDeprecatedRules.length,
+      0,
+      JSON.stringify(typescriptLintResult, null, 2),
+    )
+  })
+
+  it("should allow top-level await", async () => {
+    const [lintResult] = await eslint.lintFiles(
+      "test/fixtures/top-level-await.mjs",
+    )
+    assert.strictEqual(
+      lintResult?.errorCount,
+      0,
+      JSON.stringify(lintResult, null, 2),
+    )
+  })
+
+  it("should allow to ignore floating promise with void operator (@typescript-eslint/no-floating-promises)", async () => {
+    const [lintResult] = await eslint.lintFiles(
+      "test/fixtures/typescript-no-errors-ignore-promise.ts",
+    )
+    assert.strictEqual(
+      lintResult?.errorCount,
+      0,
+      JSON.stringify(lintResult, null, 2),
+    )
+  })
+})