78 lines
1.8 KiB
JavaScript
78 lines
1.8 KiB
JavaScript
import traverse from "../lib";
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import { parse } from "@babel/parser";
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describe("path/ancestry", function () {
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describe("isAncestor", function () {
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const ast = parse("var a = 1; 'a';");
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it("returns true if ancestor", function () {
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const paths = [];
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traverse(ast, {
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"Program|NumericLiteral"(path) {
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paths.push(path);
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},
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});
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const [programPath, numberPath] = paths;
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expect(programPath.isAncestor(numberPath)).toBeTruthy();
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});
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it("returns false if not ancestor", function () {
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const paths = [];
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traverse(ast, {
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"Program|NumericLiteral|StringLiteral"(path) {
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paths.push(path);
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},
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});
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const [, numberPath, stringPath] = paths;
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expect(stringPath.isAncestor(numberPath)).toBeFalsy();
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});
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});
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describe("isDescendant", function () {
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const ast = parse("var a = 1; 'a';");
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it("returns true if descendant", function () {
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const paths = [];
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traverse(ast, {
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"Program|NumericLiteral"(path) {
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paths.push(path);
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},
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});
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const [programPath, numberPath] = paths;
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expect(numberPath.isDescendant(programPath)).toBeTruthy();
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});
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it("returns false if not descendant", function () {
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const paths = [];
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traverse(ast, {
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"Program|NumericLiteral|StringLiteral"(path) {
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paths.push(path);
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},
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});
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const [, numberPath, stringPath] = paths;
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expect(numberPath.isDescendant(stringPath)).toBeFalsy();
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});
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});
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describe("getStatementParent", function () {
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const ast = parse("var a = 1;");
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it("should throw", function () {
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expect(function () {
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traverse(ast, {
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Program(path) {
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path.getStatementParent();
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},
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});
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}).toThrow(/File\/Program node/);
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});
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});
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});
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