valuetosource-tosource-lookup-enabled.js

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// |jit-test| --disable-tosource; --setpref=legacy_tosource_lookup=true

// Ensure the object.toSource() path in ValueToSource is enabled if the

// legacy_tosource_lookup pref is true and we're not defining the toSource/uneval

// builtins.

function testPlain() {

  var toSourceCalled = false;

  var obj = {toSource() {

    toSourceCalled = true;

    return "foo";

}};

  assertEq(valueToSource(obj), "foo");

  assertEq(toSourceCalled, true);

testPlain();

function testProxy() {

  var log = [];

  var proxy = new Proxy({}, {get(target, prop) {

    log.push(prop);

    return () => "bar";

  }});

  assertEq(valueToSource(proxy), "bar");

  assertEq(log.length, 1);

  assertEq(log[0], "toSource");

testProxy();