Method fail

packages/tinytest/tinytest.js:35–91

(doc)

  }

  fail(doc) {
    if (typeof doc === "string") {
      // Some very old code still tries to call fail() with a
      // string. Don't do this!
      doc = { type: "fail", message: doc };
    }

    doc = {
      ...doc,
      ...this.extraDetails,
    };

    if (this.stop_at_offset === 0) {
      if (Meteor.isClient) {
        // Only supported on the browser for now..
        var now = (+new Date);
        debugger;
        if ((+new Date) - now < 100)
          alert("To use this feature, first enable your browser's debugger.");
      }
      this.stop_at_offset = null;
    }
    if (this.stop_at_offset)
      this.stop_at_offset--;

    // Get filename and line number of failure if we're using v8 (Chrome or
    // Node).
    if (Error.captureStackTrace) {
      var savedPrepareStackTrace = Error.prepareStackTrace;
      Error.prepareStackTrace = function(_, stack){ return stack; };
      var err = new Error;
      Error.captureStackTrace(err);
      var stack = err.stack;
      Error.prepareStackTrace = savedPrepareStackTrace;
      for (var i = stack.length - 1; i >= 0; --i) {
        var frame = stack[i];
        // Heuristic: use the OUTERMOST line which is in a :tests.js
        // file (this is less likely to be a test helper function).
        const fileName = frame.getFileName();
        if (fileName && fileName.match(/:tests\.js/)) {
          doc.filename = fileName;
          doc.line = frame.getLineNumber();
          break;
        }
      }
    }

    this.onEvent({
        type: (this.expecting_failure ? "expected_fail" : "fail"),
        details: doc,
        cookie: {name: this.test_case.name, offset: this.current_fail_count,
                 groupPath: this.test_case.groupPath,
                 shortName: this.test_case.shortName}
    });
    this.expecting_failure = false;
    this.current_fail_count++;
  }