aeb42c2228
* babel-traverse: add test to demonstrate repeated identifiers being evaluated to `false` * fix typo: `value` -> `val` * path.evaluate: only mark item as resolved if we're confident
55 lines
1.4 KiB
JavaScript
55 lines
1.4 KiB
JavaScript
var traverse = require("../lib").default;
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var assert = require("assert");
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var parse = require("babylon").parse;
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function getPath(code) {
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var ast = parse(code);
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var path;
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traverse(ast, {
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Program: function (_path) {
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path = _path;
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_path.stop();
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}
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});
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return path;
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}
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suite("evaluation", function () {
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suite("evaluateTruthy", function () {
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test("it should work with null", function () {
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assert.strictEqual(
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getPath("false || a.length === 0;").get("body")[0].evaluateTruthy(),
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undefined
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);
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});
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test("it should not mistake lack of confidence for falsy", function () {
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assert.strictEqual(
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getPath("foo || 'bar'").get("body")[0].evaluate().value,
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undefined
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);
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});
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});
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test("should bail out on recursive evaluation", function () {
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assert.strictEqual(
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getPath("function fn(a) { var g = a ? 1 : 2, a = g * this.foo; }").get("body.0.body.body.0.declarations.1.init").evaluate().confident,
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false
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);
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});
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test("should work with repeated, indeterminate identifiers", function () {
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assert.strictEqual(
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getPath("var num = foo(); (num > 0 && num < 100);").get("body")[1].evaluateTruthy(),
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undefined
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);
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});
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test("should work with repeated, determinate identifiers", function () {
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assert.strictEqual(
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getPath("var num = 5; (num > 0 && num < 100);").get("body")[1].evaluateTruthy(),
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true
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);
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});
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});
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