Add failure scenarios tests for connection, appendToStream, deleteStream (wip)

src/common/log/fileLogger.js

@@ -0,0 +1,39 @@
+var util = require('util');
+var fs = require('fs');
+var os = require('os');
+
+function FileLogger(filePath, append) {
+  this._filePath = filePath;
+  if (!append) {
+    try {
+      fs.unlink(filePath);
+    } catch(e) {}
+  }
+}
+
+function createLine(level, args, argsStartIndex) {
+  var msg = util.format.apply(util, Array.prototype.slice.call(args, argsStartIndex));
+  return util.format('%s %s - %s%s', new Date().toISOString(), level, msg, os.EOL);
+}
+
+FileLogger.prototype.debug = function() {
+  var line = createLine('DEBUG', arguments, 0);
+  fs.appendFileSync(this._filePath, line);
+};
+
+FileLogger.prototype.info = function() {
+  var line = createLine('INFO', arguments, 0);
+  fs.appendFileSync(this._filePath, line);
+};
+
+FileLogger.prototype.error = function(e) {
+  var hasError = e instanceof Error;
+  var line = createLine('ERROR', arguments, hasError ? 1 : 0);
+  if (hasError) {
+    line += e.stack + os.EOL;
+  }
+  fs.appendFileSync(this._filePath, line);
+};
+
+
+module.exports = FileLogger;

src/common/systemMetadata.js

@@ -0,0 +1,16 @@
+const SystemMetadata = {
+  maxAge: '$maxAge',
+  maxCount: '$maxCount',
+  truncateBefore: '$tb',
+  cacheControl: '$cacheControl',
+  acl: '$acl',
+  aclRead: '$r',
+  aclWrite: '$w',
+  aclDelete: '$d',
+  aclMetaRead: '$mr',
+  aclMetaWrite: '$mw',
+  userStreamAcl: '$userStreamAcl',
+  systemStreamAcl: '$systemStreamAcl'
+};
+
+module.exports = SystemMetadata;

src/common/utils/ensure.js

@@ -8,4 +8,16 @@ module.exports.notNullOrEmpty = function(value, name) {
 module.exports.notNull = function(value, name) {
   if (value === null)
     throw new Error(name + " is null.");
+};
+
+module.exports.isInteger = function(value, name) {
+  if (typeof value !== 'number' || value % 1 !== 0)
+    throw new TypeError(name + " is not an integer.");
+};
+
+module.exports.isArrayOf = function(expectedType, value, name) {
+  if (!Array.isArray(value))
+    throw new TypeError(name + " is not an array.");
+  if (!value.every(function(x) { return x instanceof expectedType; }))
+    throw new TypeError([name, " is not an array of ", expectedType, "."].join(""));
 };