Testing Functions

The Developer Portal includes a built-in test runner for testing functions before deploying them to production.

Test Runner

Access the test runner from any function's edit page.

Features

Feature	Description
Custom input data	Define JSON test data
Method selection	Choose HTTP method (for HTTP functions)
Query parameters	Add query string parameters
User context	Test as different users
Real-time execution	See results immediately
Log viewing	View console output
Saved test inputs	Save and reuse test scenarios

Running a Test

1. Open your function in the Developer Portal
2. Click Test or open the test panel
3. Configure your test input:
   • Enter JSON data in the Body field
   • Add query parameters if needed
   • Select HTTP method (HTTP functions)
4. Click Run
5. View results and logs

Test Input Configuration

Request Body

Enter JSON data that simulates the request body:

{
  "orderId": "order-123",
  "items": [
    { "productId": "prod-1", "quantity": 2 },
    { "productId": "prod-2", "quantity": 1 }
  ],
  "customerId": "cust-456"
}

Query Parameters

Add query parameters for HTTP function tests:

Parameter	Value
page	1
limit	10
filter	active

HTTP Method

For HTTP functions, select the method to test:

• GET
• POST

User Context

The Current User Context control in the sidebar lets you test how your function behaves for different users. This is a global setting shared across REST Explorer, Data Explorer, and Function Testing.

Option	Description
System User	Full access with "Skip roles" enabled (default)
Unauthenticated	Test as anonymous user
API Users	Select a specific user or service account from your API

Testing Permissions

Option	Description
Skip Security Policy	Bypass row-level access control
Skip Roles	Ignore role-based permissions (auto-enabled for System user)

Use these options to test function logic separately from access control.

Viewing Results

Output

For HTTP functions, the res object you set appears in the Output section:

{
  "success": true,
  "processedItems": 3,
  "total": 149.97
}

For trigger functions, you'll see the modified item that will be saved.

Logs

Console output appears in the Logs section:

[INFO] 0ms - Processing order: order-123
[INFO] 15ms - Found 3 items
[INFO] 45ms - Calculated total: 149.97
[WARN] 46ms - Customer has pending balance

Each log entry shows:

• Severity level (INFO, WARN, ERROR)
• Milliseconds from execution start
• Message

Validation Errors

If validationErrors has any items, you'll see a 400 response with the errors:

["Invalid order: no items provided"]

Runtime Errors

Runtime errors (undefined variables, failed external calls, etc.) are shown in the logs but not in the response body. This matches production behavior where internal errors are not exposed to clients.

Execution Time

View total execution time in milliseconds to identify performance issues.

Saved Test Inputs

Save test configurations for reuse and regression testing.

Saving a Test Input

1. Configure your test (body, query params, method)
2. Click Save Test Input
3. Enter a descriptive name (e.g., "Valid order with 3 items")
4. Click Save

Managing Saved Inputs

Action	Description
Load	Apply saved input to current test
Update	Update saved input with current values
Rename	Change the saved input name
Delete	Remove saved input

Best Practices for Saved Inputs

Create saved inputs for:

• Happy path — Valid data that should succeed
• Edge cases — Boundary conditions (empty arrays, max values)
• Error cases — Invalid data that should fail gracefully
• Permission scenarios — Different user roles

Testing Strategies

Unit Testing Approach

Test individual functions in isolation:

1. Test with minimal valid input
2. Test with complete valid input
3. Test with invalid input
4. Test edge cases

Integration Testing

Test functions that interact with data:

1. Create test data in collections
2. Run function
3. Verify data changes
4. Clean up test data

Regression Testing

Use saved test inputs to catch regressions:

1. Create comprehensive saved inputs during development
2. Run all saved inputs after changes
3. Verify outputs match expectations

Debugging Tips

Add Logging

Insert log() statements to trace execution:

// Trigger functions
log('Processing item:', item.id);
log('Method:', req.method);

// HTTP functions
log('Request body:', JSON.stringify(req.bodyJson));
log('Calculated result:', result);

Check Variable Values

Log intermediate values to find issues:

const filtered = items.filter(i => i.active);
log('Filtered items count:', filtered.length);

const total = filtered.reduce((sum, i) => sum + i.price, 0);
log('Total before tax:', total);

Isolate Problems

Test components separately:

// Test external API call alone
const response = await fetch(externalUrl);
log('External API status:', response.status);
log('External API response:', await response.text());

Test Permissions Separately

1. First test with Skip Security Policy and Skip Roles enabled
2. Verify the function logic works
3. Then test with actual permissions
4. Fix any access control issues

Common Issues

Function Times Out

• Check for infinite loops
• Reduce external API calls
• Use parallel requests where possible
• Increase timeout limit if needed

Unexpected Results

• Log intermediate values
• Check input data format
• Verify external API responses
• Check for async/await issues

Permission Denied

• Test with Skip Security Policy/Roles first
• Verify service account permissions
• Check role assignments
• Review security policy paths