header method
Set a single HTTP header for the request.
Example:
testApp.get('/api/data')
.header('Accept', 'application/json')
.header('X-API-Key', 'secret-key');
name Header name (case-insensitive).
value Header value.
Returns this request builder for method chaining.
Implementation
TestRequest header(String name, String value) {
_headers[name] = value;
return this;
}