Add basic site generator tests

Author: i-am-chitti

features/site-generate.feature

@@ -0,0 +1,75 @@
+Feature: Generate new WordPress sites
+
+  Scenario: Generate on single site
+    Given a WP install
+    When I try `wp site generate`
+    Then STDERR should contain:
+    """
+    This is not a multisite installation.
+    """
+    And STDOUT should be empty
+    And the return code should be 1
+
+  Scenario: Generate a specific number of sites
+    Given a WP multisite install
+    When I run `wp site generate --count=10`
+    And I run `wp site list --format=count`
+    Then STDOUT should be:
+      """
+      11
+      """
+
+  Scenario: Generate sites assigned to a specific network
+    Given a WP multisite install
+    When I try `wp site generate --count=4 --network_id=2`
+    Then STDERR should contain:
+      """
+      Network with id 2 does not exist.      
+      """
+    And STDOUT should be empty
+    And the return code should be 1
+
+  Scenario: Generate sites and output ids
+    Given a WP multisite install
+    When I run `wp site generate --count=3 --format=ids`
+    When I run `wp site list --format=ids`
+    Then STDOUT should be:
+      """
+      1 2 3 4
+      """
+    And STDERR should be empty
+    And the return code should be 0
+
+  Scenario: Generate subdomain sites
+    Given a WP multisite subdomain install
+
+    When I run `wp site generate --count=1`
+    Then STDOUT should be empty
+
+    When I run `wp site list --fields=blog_id,url`
+    Then STDOUT should be a table containing rows:
+      | blog_id | url                       |
+      | 1       | https://example.com/       |
+      | 2       | http://site1.example.com/ |
+    When I run `wp site list --format=ids`
+    Then STDOUT should be:
+      """
+      1 2
+      """
+
+  Scenario: Generate subdirectory sites
+    Given a WP multisite subdirectory install
+
+	When I run `wp site generate --count=1`
+	Then STDOUT should be empty
+
+	When I run `wp site list --fields=blog_id,url`
+	Then STDOUT should be a table containing rows:
+	  | blog_id | url                       |
+	  | 1       | https://example.com/       |
+	  | 2       | https://example.com/site1/ |
+	When I run `wp site list --format=ids`
+	Then STDOUT should be:
+	  """
+	  1 2
+	  """

src/Site_Command.php

@@ -620,7 +620,10 @@ public function generate( $args, $assoc_args ) {
 			if ( 'progress' === $format ) {
 				$notify->tick();
 			} else {
-				WP_CLI::line( $id );
+				echo $id;
+				if ( $index < $limit -1 ) {
+					echo ' ';
+				}
 			}
 		}