ags

home/ags/node_modules/eslint-plugin-promise/rules/lib/is-promise-constructor.js

@@ -0,0 +1,48 @@
+/**
+ * Library: isPromiseConstructor
+ * Makes sure that an Expression node is new Promise().
+ */
+'use strict'
+
+/**
+ * @typedef {import('estree').Node} Node
+ * @typedef {import('estree').Expression} Expression
+ * @typedef {import('estree').NewExpression} NewExpression
+ * @typedef {import('estree').FunctionExpression} FunctionExpression
+ * @typedef {import('estree').ArrowFunctionExpression} ArrowFunctionExpression
+ *
+ * @typedef {NewExpression & { callee: { type: 'Identifier', name: 'Promise' } }} NewPromise
+ * @typedef {NewPromise & { arguments: [FunctionExpression | ArrowFunctionExpression] }} NewPromiseWithInlineExecutor
+ *
+ */
+/**
+ * Checks whether the given node is new Promise().
+ * @param {Node} node
+ * @returns {node is NewPromise}
+ */
+function isPromiseConstructor(node) {
+  return (
+    node.type === 'NewExpression' &&
+    node.callee.type === 'Identifier' &&
+    node.callee.name === 'Promise'
+  )
+}
+
+/**
+ * Checks whether the given node is new Promise(() => {}).
+ * @param {Node} node
+ * @returns {node is NewPromiseWithInlineExecutor}
+ */
+function isPromiseConstructorWithInlineExecutor(node) {
+  return (
+    isPromiseConstructor(node) &&
+    node.arguments.length === 1 &&
+    (node.arguments[0].type === 'FunctionExpression' ||
+      node.arguments[0].type === 'ArrowFunctionExpression')
+  )
+}
+
+module.exports = {
+  isPromiseConstructor,
+  isPromiseConstructorWithInlineExecutor,
+}