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-rw-r--r--devtools/shared/heapsnapshot/tests/xpcshell/Match.sys.mjs218
1 files changed, 218 insertions, 0 deletions
diff --git a/devtools/shared/heapsnapshot/tests/xpcshell/Match.sys.mjs b/devtools/shared/heapsnapshot/tests/xpcshell/Match.sys.mjs
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+++ b/devtools/shared/heapsnapshot/tests/xpcshell/Match.sys.mjs
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+// A little pattern-matching library.
+//
+// Ported from js/src/tests/js1_8_5/reflect-parse/Match.js for use with devtools
+// server xpcshell tests.
+
+export const Match = (function () {
+ function Pattern(template) {
+ // act like a constructor even as a function
+ if (!(this instanceof Pattern)) {
+ return new Pattern(template);
+ }
+
+ this.template = template;
+ }
+
+ Pattern.prototype = {
+ match(act) {
+ return match(act, this.template);
+ },
+
+ matches(act) {
+ try {
+ return this.match(act);
+ } catch (e) {
+ if (e instanceof MatchError) {
+ return false;
+ }
+ }
+ return false;
+ },
+
+ assert(act, message) {
+ try {
+ return this.match(act);
+ } catch (e) {
+ if (e instanceof MatchError) {
+ throw new Error((message || "failed match") + ": " + e.message);
+ }
+ }
+ return false;
+ },
+
+ toString: () => "[object Pattern]",
+ };
+
+ Pattern.ANY = new Pattern();
+ Pattern.ANY.template = Pattern.ANY;
+
+ Pattern.NUMBER = new Pattern();
+ Pattern.NUMBER.match = function (act) {
+ if (typeof act !== "number") {
+ throw new MatchError("Expected number, got: " + quote(act));
+ }
+ };
+
+ Pattern.NATURAL = new Pattern();
+ Pattern.NATURAL.match = function (act) {
+ if (typeof act !== "number" || act !== Math.floor(act) || act < 0) {
+ throw new MatchError("Expected natural number, got: " + quote(act));
+ }
+ };
+
+ const quote = uneval;
+
+ function MatchError(msg) {
+ this.message = msg;
+ }
+
+ MatchError.prototype = {
+ toString() {
+ return "match error: " + this.message;
+ },
+ };
+
+ function isAtom(x) {
+ return (
+ typeof x === "number" ||
+ typeof x === "string" ||
+ typeof x === "boolean" ||
+ x === null ||
+ (typeof x === "object" && x instanceof RegExp)
+ );
+ }
+
+ function isObject(x) {
+ return x !== null && typeof x === "object";
+ }
+
+ function isFunction(x) {
+ return typeof x === "function";
+ }
+
+ function isArrayLike(x) {
+ return isObject(x) && "length" in x;
+ }
+
+ function matchAtom(act, exp) {
+ if (typeof exp === "number" && isNaN(exp)) {
+ if (typeof act !== "number" || !isNaN(act)) {
+ throw new MatchError("expected NaN, got: " + quote(act));
+ }
+ return true;
+ }
+
+ if (exp === null) {
+ if (act !== null) {
+ throw new MatchError("expected null, got: " + quote(act));
+ }
+ return true;
+ }
+
+ if (exp instanceof RegExp) {
+ if (!(act instanceof RegExp) || exp.source !== act.source) {
+ throw new MatchError("expected " + quote(exp) + ", got: " + quote(act));
+ }
+ return true;
+ }
+
+ switch (typeof exp) {
+ case "string":
+ if (act !== exp) {
+ throw new MatchError(
+ "expected " + quote(exp) + ", got " + quote(act)
+ );
+ }
+ return true;
+ case "boolean":
+ case "number":
+ if (exp !== act) {
+ throw new MatchError("expected " + exp + ", got " + quote(act));
+ }
+ return true;
+ }
+
+ throw new Error("bad pattern: " + exp.toSource());
+ }
+
+ function matchObject(act, exp) {
+ if (!isObject(act)) {
+ throw new MatchError("expected object, got " + quote(act));
+ }
+
+ for (const key in exp) {
+ if (!(key in act)) {
+ throw new MatchError(
+ "expected property " + quote(key) + " not found in " + quote(act)
+ );
+ }
+ match(act[key], exp[key]);
+ }
+
+ return true;
+ }
+
+ function matchFunction(act, exp) {
+ if (!isFunction(act)) {
+ throw new MatchError("expected function, got " + quote(act));
+ }
+
+ if (act !== exp) {
+ throw new MatchError(
+ "expected function: " + exp + "\nbut got different function: " + act
+ );
+ }
+ }
+
+ function matchArray(act, exp) {
+ if (!isObject(act) || !("length" in act)) {
+ throw new MatchError("expected array-like object, got " + quote(act));
+ }
+
+ const length = exp.length;
+ if (act.length !== exp.length) {
+ throw new MatchError(
+ "expected array-like object of length " + length + ", got " + quote(act)
+ );
+ }
+
+ for (let i = 0; i < length; i++) {
+ if (i in exp) {
+ if (!(i in act)) {
+ throw new MatchError(
+ "expected array property " + i + " not found in " + quote(act)
+ );
+ }
+ match(act[i], exp[i]);
+ }
+ }
+
+ return true;
+ }
+
+ function match(act, exp) {
+ if (exp === Pattern.ANY) {
+ return true;
+ }
+
+ if (exp instanceof Pattern) {
+ return exp.match(act);
+ }
+
+ if (isAtom(exp)) {
+ return matchAtom(act, exp);
+ }
+
+ if (isArrayLike(exp)) {
+ return matchArray(act, exp);
+ }
+
+ if (isFunction(exp)) {
+ return matchFunction(act, exp);
+ }
+
+ return matchObject(act, exp);
+ }
+
+ return { Pattern, MatchError };
+})();