Cache: Fix cache content schema Windows compatibility

src/WpOrg/Api/Cache.php

@@ -25,19 +25,12 @@ public function read(string $slug): ?bool
             return null;
         }
 
-        $content = $this->cache->read($key);
+        $content = (string) $this->cache->read($key);
 
-        // Should never happen because of the age check.
-        if ($content === false) {
-            return null;
-        }
-
-        $lines = explode("\n", $content);
-
-        return match ($lines[0]) {
-            'closed' => true,
-            'open' => false,
-            default => null, // Unexpected content. Treat as a cache miss.
+        return match (true) {
+            str_starts_with($content, 'closed'.PHP_EOL) => true,
+            str_starts_with($content, 'open'.PHP_EOL) => false,
+            default => null, // Unexpected content. Treat as a miss.
         };
     }
 
@@ -48,10 +41,13 @@ public function write(string $slug, bool $isClosed): void
         }
 
         $content = sprintf(
-            "%s\n%s\n%s\n",
+            "%s%s%s%s%s%s",
             $isClosed ? 'closed' : 'open',
+            PHP_EOL,
             $slug,
+            PHP_EOL,
             date(DateTimeInterface::RFC3339),
+            PHP_EOL
         );
 
         $this->cache->write(

tests/Unit/WpOrg/Api/CacheTest.php

@@ -31,7 +31,7 @@ function (string $slug, bool $expected, string $firstLine): void {
                 $composerCache->expects()
                     ->read()
                     ->with("{$slug}.txt")
-                    ->andReturn("{$firstLine}\n{$slug}\n2006-01-02T15:04:05+07:00\n");
+                    ->andReturn($firstLine.PHP_EOL.$slug.PHP_EOL.'2006-01-02T15:04:05+07:00'.PHP_EOL);
 
                 $cache = new Cache($composerCache);
 
@@ -89,7 +89,7 @@ function (string $slug, bool $isClosed, string $expected): void {
 
                 $composerCache->shouldHaveReceived('write', [
                     "{$slug}.txt",
-                    Mockery::on(static fn (string $actual) => str_starts_with($actual, $expected."\n")),
+                    Mockery::on(static fn (string $actual) => str_starts_with($actual, $expected.PHP_EOL.$slug.PHP_EOL)),
                 ]);
             })->with('slugs');