tor-browser

The Tor Browser
git clone https://git.dasho.dev/tor-browser.git
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test-is-error.js (1042B)

      1 // |jit-test| --enable-error-iserror
      2 
      3 // Check if Error.isError is available
      4 if (typeof Error.isError !== "function") {
      5    quit();
      6 }
      7 
      8 // Test non-object input should return false
      9 assertEq(Error.isError(null), false);
     10 assertEq(Error.isError(undefined), false);
     11 assertEq(Error.isError(123), false);
     12 assertEq(Error.isError("string"), false);
     13 
     14 // Test plain objects should return false
     15 assertEq(Error.isError({}), false);
     16 assertEq(Error.isError(new Object()), false);
     17 
     18 // Test various error objects should return true
     19 assertEq(Error.isError(new Error()), true);
     20 assertEq(Error.isError(new TypeError()), true);
     21 assertEq(Error.isError(new RangeError()), true);
     22 
     23 // Test cross-compartment wrapper (CCW) objects
     24 const g = newGlobal({ newCompartment: true });
     25 const e = g.eval(`new Error()`);
     26 assertEq(Error.isError(e), true);
     27 
     28 nukeCCW(e);
     29 
     30 // Test Error.isError for the nuked CCW object
     31 let caught = false;
     32 try {
     33    Error.isError(e);
     34 } catch (ex) {
     35    caught = true;
     36    assertEq(ex.message, "can't access dead object");
     37 }
     38 assertEq(caught, true);