Docs: Test React example reports errors

package.json

@@ -22,7 +22,7 @@
   "scripts": {
     "lint": "eslint --ext js,md .",
     "test": "npm run lint && npm run test-cov",
-    "test-cov": "nyc _mocha -- -c tests/lib/**/*.js",
+    "test-cov": "nyc _mocha -- -c tests/{examples,lib}/**/*.js",
     "generate-release": "eslint-generate-release",
     "generate-alpharelease": "eslint-generate-prerelease alpha",
     "generate-betarelease": "eslint-generate-prerelease beta",

tests/examples/react.js

@@ -0,0 +1,25 @@
+"use strict";
+
+const assert = require("chai").assert;
+const execSync = require("child_process").execSync;
+const path = require("path");
+
+describe("examples", () => {
+    describe("react", () => {
+        it("reports errors on jsx code blocks in .md files", () => {
+            try {
+                execSync("npx eslint . --format json", {
+                    cwd: path.resolve(__dirname, "../../examples/react/")
+                });
+                assert.fail("ESLint should have found issues.");
+            } catch (error) {
+                const results = JSON.parse(error.stdout.toString());
+                const readme = results.find(result =>
+                    path.basename(result.filePath) == "README.md"
+                );
+                assert.isNotNull(readme);
+                assert.isAbove(readme.messages.length, 0);
+            }
+        });
+    });
+});