38 lines
1016 B
JavaScript
38 lines
1016 B
JavaScript
'use strict';
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const getPropertyName = require('./get-property-name');
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const prototypeMethods = ['then', 'catch'];
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const knownNotMethods = ['promisify', 'promisifyAll', 'cancel', 'is'];
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function containsThenOrCatch(node) {
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return Boolean(node) &&
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node.type === 'CallExpression' &&
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node.callee.type === 'MemberExpression' &&
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prototypeMethods.indexOf(getPropertyName(node.callee)) !== -1;
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}
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function isPromiseStaticMethod(node) {
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return Boolean(node) &&
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node.type === 'CallExpression' &&
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node.callee.type === 'MemberExpression' &&
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node.callee.object.type === 'Identifier' &&
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node.callee.object.name === 'Promise' &&
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knownNotMethods.indexOf(getPropertyName(node.callee)) === -1;
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}
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function isNewPromise(node) {
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return Boolean(node) &&
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node.type === 'NewExpression' &&
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node.callee.type === 'Identifier' &&
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node.callee.name === 'Promise';
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}
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function isPromise(node) {
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return containsThenOrCatch(node) ||
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isPromiseStaticMethod(node) ||
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isNewPromise(node);
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}
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module.exports = isPromise;
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