test: add tests for file negations

Author: shellscape

package-lock.json

@@ -9,7 +9,7 @@
   "bugs": "https://github.com/shellscape/prettier-plugin-package/issues",
   "main": "lib/index.js",
   "engines": {
-    "node": ">= 8.0.0"
+    "node": ">=10.13.0"
   },
   "scripts": {
     "ci:coverage": "nyc npm run ci:test && nyc report --reporter=text-lcov > coverage.lcov",

package.json

@@ -16,3 +16,33 @@ test('default', (t) => {
 
   t.snapshot(output);
 });
+
+test('negations', (t) => {
+  const options = {
+    filepath: 'package.json',
+    parser: 'json-stringify',
+    plugins: ['.']
+  };
+  const fixture = {
+    files: [
+      '/lit-html.js',
+      '/lit-html.js.map',
+      '/lit-html.d.ts',
+      '/lit-html.d.ts.map',
+      '/directives/',
+      '/parts.js',
+      '/parts.js.map',
+      '/parts.d.ts',
+      '/parts.d.ts.map',
+      '/src/',
+      '!/src/test/',
+      '/development/',
+      '!/development/test/'
+    ]
+  };
+
+  const input = JSON.stringify(fixture, null, 2);
+  const output = prettier.format(input, options);
+
+  t.snapshot(output);
+});

test/files.js

@@ -16,3 +16,26 @@ Generated by [AVA](https://ava.li).
       ]␊
     }␊
     `
+
+## negations
+
+> Snapshot 1
+
+    `{␊
+      "files": [␊
+        "/development/",␊
+        "!/development/test/",␊
+        "/directives/",␊
+        "/lit-html.d.ts",␊
+        "/lit-html.d.ts.map",␊
+        "/lit-html.js",␊
+        "/lit-html.js.map",␊
+        "/parts.d.ts",␊
+        "/parts.d.ts.map",␊
+        "/parts.js",␊
+        "/parts.js.map",␊
+        "/src/",␊
+        "!/src/test/"␊
+      ]␊
+    }␊
+    `