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60 lines
1.7 KiB
JavaScript

beforeEach(function() {
this.addMatchers({
toChangeAST: function(grammar) {
function matchDetails(value, details) {
function isArray(value) {
return Object.prototype.toString.apply(value) === "[object Array]";
}
function isObject(value) {
return value !== null && typeof value === "object";
}
var i, key;
if (isArray(details)) {
if (!isArray(value)) { return false; }
if (value.length !== details.length) { return false; }
for (i = 0; i < details.length; i++) {
if (!matchDetails(value[i], details[i])) { return false; }
}
return true;
} else if (isObject(details)) {
if (!isObject(value)) { return false; }
for (key in details) {
if (details.hasOwnProperty(key)) {
if (!(key in value)) { return false; }
if (!matchDetails(value[key], details[key])) { return false; }
}
}
return true;
} else {
return value === details;
}
}
var options = arguments.length > 2 ? arguments[1] : {},
details = arguments[arguments.length - 1],
ast = PEG.parser.parse(grammar);
this.actual(ast, options);
this.message = function() {
return "Expected the pass "
+ "with options " + jasmine.pp(options) + " "
+ (this.isNot ? "not " : "")
+ "to change the AST " + jasmine.pp(ast) + " "
+ "to match " + jasmine.pp(details) + ", "
+ "but it " + (this.isNot ? "did" : "didn't") + ".";
};
return matchDetails(ast, details);
}
});
});