Make ListUsersCommandTest more clear

Co-authored-by: Oleg Voronkovich <oleg-voronkovich@yandex.ru>

Author: Nek-

tests/Command/ListUsersCommandTest.php

@@ -36,25 +36,18 @@ public function maxResultsProvider(): ?\Generator
         yield [2];
     }
 
-    /**
-     * @dataProvider sendEmailProvider
-     *
-     * This test ensure that the command actually sends an email when the parameter is specified
-     */
-    public function testItSendsAnEmail(bool $sendAndEmail): void
+    public function testItSendsNoEmailByDefault(): void
     {
-        $this->executeCommand(
-            // these are the arguments (only 1 is passed, the rest are missing)
-            $sendAndEmail ? ['--send-to' => 'john.doe@symfony.com'] : []
-        );
+        $this->executeCommand([]);
 
-        $this->assertEmailCount($sendAndEmail ? 1 : 0);
+        $this->assertEmailCount(0);
     }
 
-    public function sendEmailProvider(): ?\Generator
+    public function testItSendsAnEmailIfOptionProvided(): void
     {
-        yield [true];
-        yield [false];
+        $this->executeCommand(['--send-to' => 'john.doe@symfony.com']);
+
+        $this->assertEmailCount(1);
     }
 
     protected function getCommandFqcn(): string