text: // Licensed under the Apache License, Version 2.0 (the "License"); you may not
  // use this file except in compliance with the License.  You may obtain a copy
  // of the License at
  //
  //   http://www.apache.org/licenses/LICENSE-2.0
  //
  // Unless required by applicable law or agreed to in writing, software
  // distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
  // WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  See the
  // License for the specific language governing permissions and limitations under
  // the License.
  
  couchTests.view_errors = function(debug) {
    var db = new CouchDB("test_suite_db");
    db.deleteDb();
    db.createDb();
    if (debug) debugger;
  
    var doc = {integer: 1, string: "1", array: [1, 2, 3]};
    T(db.save(doc).ok);
  
    // emitting a key value that is undefined should result in that row not
    // being included in the view results
    var results = db.query(function(doc) {
      emit(doc.undef, null);
    });
    T(results.total_rows == 0);
  
    // if a view function throws an exception, its results are not included in
    // the view index, but the view does not itself raise an error
    var results = db.query(function(doc) {
      doc.undef(); // throws an error
    });
    T(results.total_rows == 0);
  
    // if a view function includes an undefined value in the emitted key or
    // value, an error is logged and the result is not included in the view
    // index, and the view itself does not raise an error
    var results = db.query(function(doc) {
      emit([doc._id, doc.undef], null);
    });
    T(results.total_rows == 0);
    
    // querying a view with invalid params should give a resonable error message
    var xhr = CouchDB.request("POST", "/test_suite_db/_temp_view?startkey=foo", {
      headers: {"Content-Type": "application/json"},
      body: JSON.stringify({language: "javascript", 
        map : "function(doc){emit(doc.integer)}"
      })
    });
    T(JSON.parse(xhr.responseText).error == "invalid_json");
  };
  