Merge pull request #3 from csprance/default-command-callback

PR for #2 default command callback
rohanchandra · Oct 6, 2018 · 89f9326 · 89f9326
2 parents 0b527c0 + c996880
commit 89f9326
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Showing 2 changed files with 13 additions and 4 deletions.
diff --git a/src/emulator/command-runner.js b/src/emulator/command-runner.js
@@ -27,13 +27,14 @@ const makeRunnerErrorOutput = (errorType) => {
  * @param  {Map}    commandMapping command mapping from emulator state
  * @param  {string} commandName    name of command to run
  * @param  {array}  commandArgs    commands to provide to the command function
+ * @param  {function}  notFoundCallback a default function to be run if no command is found
  * @return {object}                outputs and/or new state of the emulator
  */
-export const run = (commandMapping, commandName, commandArgs) => {
+export const run = (commandMapping, commandName, commandArgs, notFoundCallback = () => ({
+  output: makeRunnerErrorOutput(emulatorErrorType.COMMAND_NOT_FOUND)
+})) => {
   if (!CommandMappingUtil.isCommandSet(commandMapping, commandName)) {
-    return {
-      output: makeRunnerErrorOutput(emulatorErrorType.COMMAND_NOT_FOUND)
-    };
+    return notFoundCallback(...commandArgs);
   }
 
   const command = CommandMappingUtil.getCommandFn(commandMapping, commandName);

diff --git a/test/emulator/command-runner.spec.js b/test/emulator/command-runner.spec.js
@@ -56,5 +56,13 @@ describe('command-runner', () => {
 
       chai.expect(output.content).to.include(emulatorErrorType.COMMAND_NOT_FOUND);
     });
+
+    it('should run a notFoundCallback command if command not in mapping and notFoundCallback provided', () => {
+      const commandMapping = createCommandMapping({});
+      const notFoundCallback = ()=> true;
+
+      chai.expect(run(commandMapping, 'noSuchKey', [], notFoundCallback)).to.equal(true);
+    });
+
   });
 });