From 61189de6cb5a7c9691d86a8015d07e1d715fff53 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Simon=20Andr=C3=A9?= <smn.andre@gmail.com>
Date: Wed, 8 Jan 2025 22:48:27 +0100
Subject: [PATCH] feat: Add `assertOutputEmpty`/`NotEmpty` and
 `assertErrorOutputEmpty`/`NotEmpty` (#26)

---
 src/CommandResult.php            | 28 ++++++++++++++++++++++++++++
 tests/Fixture/FixtureCommand.php | 14 ++++++++++++++
 tests/FunctionalTest.php         | 27 +++++++++++++++++++++++++++
 3 files changed, 69 insertions(+)

diff --git a/src/CommandResult.php b/src/CommandResult.php
index 00153de..787bf71 100644
--- a/src/CommandResult.php
+++ b/src/CommandResult.php
@@ -61,6 +61,20 @@ public function assertOutputNotContains(string $expected): self
         return $this;
     }
 
+    public function assertOutputEmpty(): self
+    {
+        Assert::that($this->output())->isEmpty();
+
+        return $this;
+    }
+
+    public function assertOutputNotEmpty(): self
+    {
+        Assert::that($this->output())->isNotEmpty();
+
+        return $this;
+    }
+
     public function assertErrorOutputContains(string $expected): self
     {
         Assert::that($this->errorOutput())->contains($expected);
@@ -75,6 +89,20 @@ public function assertErrorOutputNotContains(string $expected): self
         return $this;
     }
 
+    public function assertErrorOutputEmpty(): self
+    {
+        Assert::that($this->errorOutput())->isEmpty();
+
+        return $this;
+    }
+
+    public function assertErrorOutputNotEmpty(): self
+    {
+        Assert::that($this->errorOutput())->isNotEmpty();
+
+        return $this;
+    }
+
     public function assertSuccessful(): self
     {
         return $this->assertStatusCode(0);
diff --git a/tests/Fixture/FixtureCommand.php b/tests/Fixture/FixtureCommand.php
index cc96475..5d10693 100644
--- a/tests/Fixture/FixtureCommand.php
+++ b/tests/Fixture/FixtureCommand.php
@@ -18,6 +18,7 @@
 use Symfony\Component\Console\Input\InputInterface;
 use Symfony\Component\Console\Input\InputOption;
 use Symfony\Component\Console\Output\ConsoleOutputInterface;
+use Symfony\Component\Console\Output\NullOutput;
 use Symfony\Component\Console\Output\OutputInterface;
 use Symfony\Component\Console\Question\Question;
 use Symfony\Component\Console\Style\SymfonyStyle;
@@ -40,6 +41,8 @@ protected function configure(): void
             ->addOption('opt3', null, InputOption::VALUE_REQUIRED | InputOption::VALUE_IS_ARRAY)
             ->addOption('throw', null, InputOption::VALUE_NONE)
             ->addOption('code', null, InputOption::VALUE_REQUIRED, '', 0)
+            ->addOption('output', null, InputOption::VALUE_NONE | InputOption::VALUE_NEGATABLE)
+            ->addOption('error-output', null, InputOption::VALUE_NONE | InputOption::VALUE_NEGATABLE)
         ;
     }
 
@@ -50,6 +53,13 @@ protected function execute(InputInterface $input, OutputInterface $output): int
     {
         $errOutput = $output->getErrorOutput();
 
+        if (false === $input->getOption('output')) {
+            $output = new NullOutput();
+        }
+        if (false === $input->getOption('error-output')) {
+            $errOutput = new NullOutput();
+        }
+
         $output->writeln('Executing <info>command</info>...');
         $output->writeln("verbosity: {$output->getVerbosity()}");
         $output->writeln('decorated: '.($output->isDecorated() ? 'yes' : 'no'));
@@ -75,6 +85,10 @@ protected function execute(InputInterface $input, OutputInterface $output): int
             $output->writeln("opt3 value: {$value}");
         }
 
+        if ($output instanceof NullOutput || $errOutput instanceof NullOutput) {
+            return (int) $input->getOption('code');
+        }
+
         (new SymfonyStyle($input, $output))->success('Long link: https://github.com/zenstruck/console-test/blob/997ee1f66743342ffd9cd00a77613ebfa2efd2b8/src/CommandResult.php');
 
         $table = new Table($output->section());
diff --git a/tests/FunctionalTest.php b/tests/FunctionalTest.php
index 630c2bf..8ac0314 100644
--- a/tests/FunctionalTest.php
+++ b/tests/FunctionalTest.php
@@ -37,6 +37,7 @@ public function string_command_with_no_arguments(): void
             ->assertOutputNotContains('arg1')
             ->assertOutputNotContains('opt1')
             ->assertOutputContains('Error output')
+            ->assertOutputNotEmpty()
         ;
     }
 
@@ -245,6 +246,32 @@ public function can_adjust_verbosity_with_v_option(): void
         ;
     }
 
+    /**
+     * @test
+     */
+    public function can_turn_off_output(): void
+    {
+        $this->consoleCommand('fixture:command --no-output')
+            ->splitOutputStreams()
+            ->execute()
+            ->assertOutputEmpty()
+            ->assertErrorOutputNotEmpty()
+        ;
+    }
+
+    /**
+     * @test
+     */
+    public function can_turn_off_error_output(): void
+    {
+        $this->consoleCommand('fixture:command --no-error-output')
+            ->splitOutputStreams()
+            ->execute()
+            ->assertOutputNotEmpty()
+            ->assertErrorOutputEmpty()
+        ;
+    }
+
     /**
      * @test
      */