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;
  
  
  
    run_on_modified_server(
      [{section: "couchdb",
        key: "os_process_timeout",
        value: "500"}],
      function() {
        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");
  
        // views should ignore Content-Type, like the rest of CouchDB
        var xhr = CouchDB.request("POST", "/test_suite_db/_temp_view", {
          headers: {"Content-Type": "application/x-www-form-urlencoded"},
          body: JSON.stringify({language: "javascript",
            map : "function(doc){}"
          })
        });
        T(xhr.status == 200);
  
        var map = function (doc) {emit(doc.integer, doc.integer);};
  
        try {
            db.query(map, null, {group: true});
            T(0 == 1);
        } catch(e) {
            T(e.error == "query_parse_error");
        }
  
        // reduce=false on map views doesn't work, so group=true will
        // never throw for temp reduce views.
  
        var designDoc = {
          _id:"_design/test",
          language: "javascript",
          views: {
            "no_reduce": {map:"function(doc) {emit(doc._id, null);}"},
            "with_reduce": {
              map:"function (doc) {emit(doc.integer, doc.integer)};",
              reduce:"function (keys, values) { return sum(values); };"}
          }
        };
        T(db.save(designDoc).ok);
  
        var designDoc2 = {
          _id:"_design/testbig",
          language: "javascript",
          views: {
            "reduce_too_big"  : {
              map:"function (doc) {emit(doc.integer, doc.integer)};",
              reduce:"function (keys, values) { var chars = []; for (var i=0; i < 1000; i++) {chars.push('wazzap');};return chars; };"}
          }
        };
        T(db.save(designDoc2).ok);
  
        try {
            db.view("test/no_reduce", {group: true});
            T(0 == 1);
        } catch(e) {
            T(e.error == "query_parse_error");
        }
  
        try {
          db.view("test/no_reduce", {reduce: true});
          T(0 == 1);
        } catch(e) {
          T(db.last_req.status == 400);
          T(e.error == "query_parse_error");
        }
  
        try {
            db.view("test/with_reduce", {group: true, reduce: false});
            T(0 == 1);
        } catch(e) {
            T(e.error == "query_parse_error");
        }
  
        var designDoc3 = {
          _id:"_design/infinite",
          language: "javascript",
          views: {
            "infinite_loop" :{map:"function(doc) {while(true){emit(doc,doc);}};"}
          }
        };
        T(db.save(designDoc3).ok);
  
        try {
            db.view("infinite/infinite_loop");
            T(0 == 1);
        } catch(e) {
            T(e.error == "os_process_error");
        }
  
        // Check error responses for invalid multi-get bodies.
        var path = "/test_suite_db/_design/test/_view/no_reduce";
        var xhr = CouchDB.request("POST", path, {body: "[]"});
        T(xhr.status == 400);
        result = JSON.parse(xhr.responseText);
        T(result.error == "bad_request");
        T(result.reason == "Request body must be a JSON object");
        var data = "{\"keys\": 1}";
        xhr = CouchDB.request("POST", path, {body:data});
        T(xhr.status == 400);
        result = JSON.parse(xhr.responseText);
        T(result.error == "bad_request");
        T(result.reason == "`keys` member must be a array.");
  
        // if the reduce grows to fast, throw an overflow error
        var path = "/test_suite_db/_design/testbig/_view/reduce_too_big";
        xhr = CouchDB.request("GET", path);
        T(xhr.status == 500);
        result = JSON.parse(xhr.responseText);
        T(result.error == "reduce_overflow_error");
      });
  };
  