add rule to ban new Date()

Author: Quramy

src/rules/no-new-date.test.ts

@@ -0,0 +1,26 @@
+import { RuleTester } from "eslint";
+
+import rule from "./no-new-date";
+
+const tester = new RuleTester({ parserOptions: { ecmaVersion: 2015 } });
+
+tester.run("no-new-date", rule, {
+  valid: [
+    { code: `new Date(1, 2, 3)` },
+    { code: `hoge.now()` },
+  ],
+  invalid: [
+    {
+      code: `Date.now()`,
+      errors: [{ message: /.*/ }],
+    },
+    {
+      code: `moment()`,
+      errors: [{ message: /.*/ }],
+    },
+    {
+      code: `new Date()`,
+      errors: [{ message: /.*/ }],
+    }
+  ],
+});

src/rules/no-new-date.ts

@@ -0,0 +1,36 @@
+import { Rule } from "eslint";
+import { Node, MemberExpression, NewExpression } from "estree";
+
+const rule: Rule.RuleModule = {
+  create: (context) => {
+    return {
+      "CallExpression > MemberExpression > Identifier.property[name='now']": (node: Node) => {
+        const parent = context.getAncestors().pop() as MemberExpression;
+        const objectNode = parent.object;
+        if (objectNode.type === "Identifier" && objectNode.name === "Date") {
+          context.report({
+            message: "Don't use 'Date.now()'",
+            node,
+          });
+        }
+      },
+      "CallExpression > Identifier[name='moment']": (node: Node) => {
+        context.report({
+          message: "Don't use 'moment()'",
+          node,
+        });
+      },
+      "NewExpression > Identifier.callee[name='Date']": (node: Node) => {
+        const parent = context.getAncestors().pop() as NewExpression;
+        if (!parent.arguments.length) {
+          context.report({
+            message: "Don't use 'new Date()'",
+            node,
+          });
+        }
+      },
+    };
+  }
+};
+
+export = rule;