How do you test Azure Queue trigger functions locally?

Where messages in queue can be found

According to this article:

The storage emulator uses a local Microsoft SQL Server instance and the local file system to emulate Azure storage services. By default, the storage emulator uses a database in Microsoft SQL Server 2012 Express LocalDB. You can choose to configure the storage emulator to access a local instance of SQL Server instead of the LocalDB instance.

Therefore, you need to:

• install and configure Azure Storage Emulator;
• start it;
• when it's running, access Queue service via url: http://127.0.0.1:10001/<account-name>/<resource-path>

In the worst case, you can bind your local function to real Azure Storage Queue.

Queue connection string

In few words: install VS Tools for Azure Functions; add local settings; add QueueTrigger attribute to your function method parameter.

Visual Studio Tools for Azure Functions.

Once you create a new Function project, add local.settings.json file to the root of your solution with the similar content:

{  "IsEncrypted": false,  "Values": {    "AzureWebJobsStorage": "UseDevelopmentStorage=true",    "AzureWebJobsDashboard": "UseDevelopmentStorage=true",    "YourQueueConnectionString": "http://127.0.0.1:10001/MyAccount"  }}

Add QueueTrigger attribute. Your Azure Function entry point should be like:

[FunctionName("MyQueueFunction")]public static async Task Run([QueueTrigger("MyQueue", Connection = "YourQueueConnectionString")] string message, TraceWriter log)

1) To view the messages in your queue, you can use the Azure Storage Explorer: https://azure.microsoft.com/en-us/features/storage-explorer/

2) To have your function connect to the queue, you will need the storage account's key. You can get this by following this SO answer: https://stackoverflow.com/a/43219736/84395

Once you have the key, add a new value in the local.settings.json:

{  "IsEncrypted": false,     "Values": {    "AzureWebJobsStorage": "<connection string>",     "AzureWebJobsDashboard": "<connection string>",    "MyStorageAccountConnection": "DefaultEndpointsProtocol=https;AccountName=[XXXX_YOUR_ACCOUNT_NAME_XXXX];AccountKey=[XXXX_YOUR_KEY_XXXX];EndpointSuffix=core.windows.net"  }}

So to answer your second question: You would specify MyStorageAccountConnection as the name of the connection.