From bc9cbe64f12bf885ed021b166704e7e64ce84a1c Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Th=C3=A9o=20FIDRY?=
 <5175937+theofidry@users.noreply.github.com>
Date: Thu, 14 Jul 2022 11:23:29 +0200
Subject: [PATCH] Validate the config (#130)

---
 src/Config.php       | 48 +++++++++++++++++++++++++++++++++++++++++---
 tests/ConfigTest.php | 44 ++++++++++++++++++++++++++++++++++++++++
 2 files changed, 89 insertions(+), 3 deletions(-)

diff --git a/src/Config.php b/src/Config.php
index 02100ba..e4c77b9 100644
--- a/src/Config.php
+++ b/src/Config.php
@@ -5,6 +5,7 @@
 namespace Bamarni\Composer\Bin;
 
 use Composer\Composer;
+use UnexpectedValueException;
 use function array_merge;
 
 final class Config
@@ -51,9 +52,50 @@ public function __construct(array $extra)
             $extra[self::EXTRA_CONFIG_KEY] ?? []
         );
 
-        $this->binLinks = $config[self::BIN_LINKS_ENABLED];
-        $this->targetDirectory = $config[self::TARGET_DIRECTORY];
-        $this->forwardCommand = $config[self::FORWARD_COMMAND];
+        $getType = function_exists('get_debug_type') ? 'get_debug_type' : 'gettype';
+
+        $binLinks = $config[self::BIN_LINKS_ENABLED];
+
+        if (!is_bool($binLinks)) {
+            throw new UnexpectedValueException(
+                sprintf(
+                    'Expected setting "%s.%s" to be a boolean value. Got "%s".',
+                    self::EXTRA_CONFIG_KEY,
+                    self::BIN_LINKS_ENABLED,
+                    $getType($binLinks)
+                )
+            );
+        }
+
+        $targetDirectory = $config[self::TARGET_DIRECTORY];
+
+        if (!is_string($targetDirectory)) {
+            throw new UnexpectedValueException(
+                sprintf(
+                    'Expected setting "%s.%s" to be a string. Got "%s".',
+                    self::EXTRA_CONFIG_KEY,
+                    self::TARGET_DIRECTORY,
+                    $getType($targetDirectory)
+                )
+            );
+        }
+
+        $forwardCommand = $config[self::FORWARD_COMMAND];
+
+        if (!is_bool($forwardCommand)) {
+            throw new UnexpectedValueException(
+                sprintf(
+                    'Expected setting "%s.%s" to be a boolean value. Got "%s".',
+                    self::EXTRA_CONFIG_KEY,
+                    self::FORWARD_COMMAND,
+                    gettype($forwardCommand)
+                )
+            );
+        }
+
+        $this->binLinks = $binLinks;
+        $this->targetDirectory = $targetDirectory;
+        $this->forwardCommand = $forwardCommand;
     }
 
     public function binLinksAreEnabled(): bool
diff --git a/tests/ConfigTest.php b/tests/ConfigTest.php
index 94c96f1..948d5f2 100644
--- a/tests/ConfigTest.php
+++ b/tests/ConfigTest.php
@@ -6,6 +6,7 @@
 
 use Bamarni\Composer\Bin\Config;
 use PHPUnit\Framework\TestCase;
+use UnexpectedValueException;
 
 final class ConfigTest extends TestCase
 {
@@ -54,4 +55,47 @@ public static function provideExtraConfig(): iterable
             true,
         ];
     }
+
+    /**
+     * @dataProvider provideInvalidExtraConfig
+     */
+    public function test_it_cannot_be_instantiated_with_invalid_config(
+        array $extra,
+        string $expectedMessage
+    ): void {
+        $this->expectException(UnexpectedValueException::class);
+        $this->expectExceptionMessage($expectedMessage);
+
+        new Config($extra);
+    }
+
+    public static function provideInvalidExtraConfig(): iterable
+    {
+        yield 'non bool bin links' => [
+            [
+                Config::EXTRA_CONFIG_KEY => [
+                    Config::BIN_LINKS_ENABLED => 'foo',
+                ],
+            ],
+            'Expected setting "bamarni-bin.bin-links" to be a boolean value. Got "string".',
+        ];
+
+        yield 'non string target directory' => [
+            [
+                Config::EXTRA_CONFIG_KEY => [
+                    Config::TARGET_DIRECTORY => false,
+                ],
+            ],
+            'Expected setting "bamarni-bin.target-directory" to be a string. Got "bool".',
+        ];
+
+        yield 'non bool forward command' => [
+            [
+                Config::EXTRA_CONFIG_KEY => [
+                    Config::FORWARD_COMMAND => 'foo',
+                ],
+            ],
+            'Expected setting "bamarni-bin.forward-command" to be a boolean value. Got "string".',
+        ];
+    }
 }