curl_command: Add support for --user option

Co-authored-by: Ewoud Kohl van Wijngaarden <ewoud@kohlvanwijngaarden.nl>

Author: bastelfreak

README.md

@@ -280,6 +280,15 @@ Some [Serverspec](https://serverspec.org/) extensions are shipped and enabled by
 Often you want to test some service that exposes things over HTTP.
 Instead of using [`command("curl …")`](https://serverspec.org/resource_types.html#command) you can use `curl_command(…)` which behaves like a Serverspec `command` but adds matchers for the HTTP response code and the response body.
 
+Various parameters map to curl CLI options.
+The following parameters are supported (they map directly to the curl CLI options, check the curl manpage for details):
+
+* `headers` ( hash of header options
+* `user`
+* `cacert`
+* `cert`
+* `key`
+
 ```ruby
 describe curl_command("http://localhost:8080/api/ping") do
   its(:response_code) { is_expected.to eq(200) }
@@ -290,4 +299,9 @@ describe curl_command('http://localhost:8080/api/status', headers: { 'Accept' =>
   its(:response_code) { is_expected.to eq(200) }
   its(:body_as_json) { is_expected.to eq({'status': 'ok'}) }
 end
+
+describe curl_command('http://localhost:8080/api/status', user: 'foo:bar', cacert: '/tmp/ca.pem', cert: '/tmp/baz.pem', key: '/tmp/baz.key') do
+  its(:response_code) { is_expected.to eq(200) }
+  its(:body_as_json) { is_expected.to eq({'status': 'ok'}) }
+end
 ```

lib/voxpupuli/acceptance/serverspec_extensions/curl_command.rb

@@ -33,7 +33,7 @@ def curl_command
 
           @options.each do |option, value|
             case option
-            when :cacert, :cert, :key
+            when :cacert, :cert, :key, :user
               command += " --#{option} '#{value}'"
             when :headers
               value.each do |header, header_value|