Refactor cached tenant resolvers with decorator pattern

tests/Resolvers/CachedTenantResolverTest.php

@@ -0,0 +1,50 @@
+<?php
+
+declare(strict_types=1);
+
+use Illuminate\Cache\Repository;
+use Illuminate\Contracts\Cache\Store;
+use Stancl\Tenancy\Contracts\TenantResolver;
+use Stancl\Tenancy\Resolvers\CachedTenantResolver;
+use Stancl\Tenancy\Tests\Etc\Tenant;
+
+it('uses the underlying resolver if cache is stale', function () {
+    $underlying = Mockery::mock(TenantResolver::class);
+    $cache = new Repository($store = Mockery::mock(Store::class));
+
+    $args = [
+        'id' => 1,
+    ];
+
+    $resolver = new CachedTenantResolver(
+        tenantResolver: $underlying,
+        cache: $cache,
+        prefix: '_tenant_resolver',
+    );
+
+    $store->expects('get')->withAnyArgs()->andReturnNull();
+    $underlying->expects('resolve')->andReturn($tenant = new Tenant());
+    $store->expects('put')->withSomeOfArgs($tenant);
+
+    expect($resolver->resolve($args))->toBe($tenant);
+});
+
+it('skips the underlying resolver if cache is valid', function () {
+    $underlying = Mockery::mock(TenantResolver::class);
+    $cache =  new Repository($store = Mockery::mock(Store::class));
+
+    $args = [
+        'id' => 1,
+    ];
+
+    $resolver = new CachedTenantResolver(
+        tenantResolver: $underlying,
+        cache: $cache,
+        prefix: '_tenant_resolver',
+    );
+
+    $cache->expects('get')->withAnyArgs()->andReturn($tenant = new Tenant());
+    $underlying->expects('resolve')->never();
+
+    expect($resolver->resolve($args))->toBe($tenant);
+});