test: add test for fs.lchmod

test/parallel/test-fs-lchmod.js

@@ -0,0 +1,67 @@
+'use strict';
+
+const common = require('../common');
+const assert = require('assert');
+const util = require('util');
+const fs = require('fs');
+const { promises } = fs;
+const f = __filename;
+
+// This test ensures that input for lchmod is valid, testing for valid
+// inputs for path, mode and callback
+
+if (!common.isOSX) {
+  common.skip('lchmod is only available on macOS');
+}
+
+// Check callback
+assert.throws(() => fs.lchmod(f), { code: 'ERR_INVALID_CALLBACK' });
+assert.throws(() => fs.lchmod(), { code: 'ERR_INVALID_CALLBACK' });
+assert.throws(() => fs.lchmod(f, {}), { code: 'ERR_INVALID_CALLBACK' });
+
+// Check path
+[false, 1, {}, [], null, undefined].forEach((i) => {
+  common.expectsError(
+    () => fs.lchmod(i, 0o777, common.mustNotCall()),
+    {
+      code: 'ERR_INVALID_ARG_TYPE',
+      type: TypeError
+    }
+  );
+  common.expectsError(
+    () => fs.lchmodSync(i),
+    {
+      code: 'ERR_INVALID_ARG_TYPE',
+      type: TypeError
+    }
+  );
+});
+
+// Check mode
+[false, null, undefined, {}, [], '', '123x'].forEach((input) => {
+  const errObj = {
+    code: 'ERR_INVALID_ARG_VALUE',
+    name: 'TypeError [ERR_INVALID_ARG_VALUE]',
+    message: 'The argument \'mode\' must be a 32-bit unsigned integer or an ' +
+             `octal string. Received ${util.inspect(input)}`
+  };
+
+  promises.lchmod(f, input, () => {})
+    .then(common.mustNotCall())
+    .catch(common.expectsError(errObj));
+  assert.throws(() => fs.lchmodSync(f, input), errObj);
+});
+
+[-1, 2 ** 32].forEach((input) => {
+  const errObj = {
+    code: 'ERR_OUT_OF_RANGE',
+    name: 'RangeError [ERR_OUT_OF_RANGE]',
+    message: 'The value of "mode" is out of range. It must be >= 0 && < ' +
+             `4294967296. Received ${input}`
+  };
+
+  promises.lchmod(f, input, () => {})
+    .then(common.mustNotCall())
+    .catch(common.expectsError(errObj));
+  assert.throws(() => fs.lchmodSync(f, input), errObj);
+});