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59 lines
1.5 KiB
JavaScript
59 lines
1.5 KiB
JavaScript
if (typeof module !== "undefined") {
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PEG = require("../lib/peg.js");
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}
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beforeEach(function() {
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this.addMatchers({
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toChangeAST: function(grammar, details) {
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function matchDetails(value, details) {
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function isArray(value) {
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return Object.prototype.toString.apply(value) === "[object Array]";
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}
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function isObject(value) {
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return value !== null && typeof value === "object";
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}
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var i, key;
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if (isArray(details)) {
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if (!isArray(value)) { return false; }
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if (value.length !== details.length) { return false; }
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for (i = 0; i < details.length; i++) {
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if (!matchDetails(value[i], details[i])) { return false; }
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}
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return true;
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} else if (isObject(details)) {
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if (!isObject(value)) { return false; }
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for (key in details) {
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if (!(key in value)) { return false; }
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if (!matchDetails(value[key], details[key])) { return false; }
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}
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return true;
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} else {
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return value === details;
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}
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}
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var ast = PEG.parser.parse(grammar);
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this.actual(ast);
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this.message = function() {
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return "Expected the pass "
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+ (this.isNot ? "not " : "")
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+ "to change the AST " + jasmine.pp(ast) + " "
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+ "to match " + jasmine.pp(details) + ", "
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+ "but it " + (this.isNot ? "did" : "didn't") + ".";
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};
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return matchDetails(ast, details);
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}
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});
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});
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