[11.x] Add typed getters for configuration

src/Illuminate/Config/Repository.php

@@ -6,6 +6,7 @@
 use Illuminate\Contracts\Config\Repository as ConfigContract;
 use Illuminate\Support\Arr;
 use Illuminate\Support\Traits\Macroable;
+use InvalidArgumentException;
 
 class Repository implements ArrayAccess, ConfigContract
 {
@@ -77,6 +78,106 @@ public function getMany($keys)
         return $config;
     }
 
+    /**
+     * Get the specified string configuration value.
+     *
+     * @param  string  $key
+     * @param  mixed  $default
+     * @return string
+     */
+    public function string(string $key, $default = null): string
+    {
+        $value = $this->get($key, $default);
+
+        if (! is_string($value)) {
+            throw new InvalidArgumentException(
+                sprintf('Configuration value for key [%s] must be a string, %s given.', $key, gettype($value))
+            );
+        }
+
+        return $value;
+    }
+
+    /**
+     * Get the specified integer configuration value.
+     *
+     * @param  string  $key
+     * @param  mixed  $default
+     * @return int
+     */
+    public function integer(string $key, $default = null): int
+    {
+        $value = $this->get($key, $default);
+
+        if (! is_int($value)) {
+            throw new InvalidArgumentException(
+                sprintf('Configuration value for key [%s] must be an integer, %s given.', $key, gettype($value))
+            );
+        }
+
+        return $value;
+    }
+
+    /**
+     * Get the specified float configuration value.
+     *
+     * @param  string  $key
+     * @param  mixed  $default
+     * @return float
+     */
+    public function float(string $key, $default = null): float
+    {
+        $value = $this->get($key, $default);
+
+        if (! is_float($value)) {
+            throw new InvalidArgumentException(
+                sprintf('Configuration value for key [%s] must be a float, %s given.', $key, gettype($value))
+            );
+        }
+
+        return $value;
+    }
+
+    /**
+     * Get the specified boolean configuration value.
+     *
+     * @param  string  $key
+     * @param  mixed  $default
+     * @return bool
+     */
+    public function boolean(string $key, $default = null): bool
+    {
+        $value = $this->get($key, $default);
+
+        if (! is_bool($value)) {
+            throw new InvalidArgumentException(
+                sprintf('Configuration value for key [%s] must be a boolean, %s given.', $key, gettype($value))
+            );
+        }
+
+        return $value;
+    }
+
+    /**
+     * Get the specified array configuration value.
+     *
+     * @param  string  $key
+     * @param  mixed  $default
+     * @return array<array-key, mixed>
+     */
+    public function array(string $key, $default = null): array
+    {
+        $value = $this->get($key, $default);
+
+        if (! is_array($value)) {
+            throw new InvalidArgumentException(
+                sprintf('Configuration value for key [%s] must be an array, %s given.', $key, gettype($value))
+            );
+        }
+
+        return $value;
+    }
+
     /**
      * Set a given configuration value.
      *

tests/Config/RepositoryTest.php

@@ -3,6 +3,7 @@
 namespace Illuminate\Tests\Config;
 
 use Illuminate\Config\Repository;
+use InvalidArgumentException;
 use PHPUnit\Framework\TestCase;
 
 class RepositoryTest extends TestCase
@@ -25,6 +26,8 @@ protected function setUp(): void
             'baz' => 'bat',
             'null' => null,
             'boolean' => true,
+            'integer' => 1,
+            'float' => 1.1,
             'associate' => [
                 'x' => 'xxx',
                 'y' => 'yyy',
@@ -252,4 +255,79 @@ public function testsItIsMacroable()
 
         $this->assertSame('macroable', $this->repository->foo());
     }
+
+    public function testItGetsAsString(): void
+    {
+        $this->assertSame(
+            $this->repository->string('a.b'), 'c'
+        );
+    }
+
+    public function testItThrowsAnExceptionWhenTryingToGetNonStringValueAsString(): void
+    {
+        $this->expectException(InvalidArgumentException::class);
+        $this->expectExceptionMessageMatches('#^Configuration value for key \[a\] must be a string, (.*) given.#');
+
+        $this->repository->string('a');
+    }
+
+    public function testItGetsAsArray(): void
+    {
+        $this->assertSame(
+            $this->repository->array('array'), ['aaa', 'zzz']
+        );
+    }
+
+    public function testItThrowsAnExceptionWhenTryingToGetNonArrayValueAsArray(): void
+    {
+        $this->expectException(InvalidArgumentException::class);
+        $this->expectExceptionMessageMatches('#Configuration value for key \[a.b\] must be an array, (.*) given.#');
+
+        $this->repository->array('a.b');
+    }
+
+    public function testItGetsAsBoolean(): void
+    {
+        $this->assertTrue(
+            $this->repository->boolean('boolean')
+        );
+    }
+
+    public function testItThrowsAnExceptionWhenTryingToGetNonBooleanValueAsBoolean(): void
+    {
+        $this->expectException(InvalidArgumentException::class);
+        $this->expectExceptionMessageMatches('#Configuration value for key \[a.b\] must be a boolean, (.*) given.#');
+
+        $this->repository->boolean('a.b');
+    }
+
+    public function testItGetsAsInteger(): void
+    {
+        $this->assertSame(
+            $this->repository->integer('integer'), 1
+        );
+    }
+
+    public function testItThrowsAnExceptionWhenTryingToGetNonIntegerValueAsInteger(): void
+    {
+        $this->expectException(InvalidArgumentException::class);
+        $this->expectExceptionMessageMatches('#Configuration value for key \[a.b\] must be an integer, (.*) given.#');
+
+        $this->repository->integer('a.b');
+    }
+
+    public function testItGetsAsFloat(): void
+    {
+        $this->assertSame(
+            $this->repository->float('float'), 1.1
+        );
+    }
+
+    public function testItThrowsAnExceptionWhenTryingToGetNonFloatValueAsFloat(): void
+    {
+        $this->expectException(InvalidArgumentException::class);
+        $this->expectExceptionMessageMatches('#^Configuration value for key \[a.b\] must be a float, (.*) given.#');
+
+        $this->repository->float('a.b');
+    }
 }