Add FailingProvider

lib/Provider/FailingProvider.php

@@ -0,0 +1,19 @@
+<?php
+
+namespace ICanBoogie\CLDR\Provider;
+
+use ICanBoogie\CLDR\Provider;
+use LogicException;
+
+/**
+ * A {@see Provider} that fails to provide any path.
+ *
+ * This provider is useful when you want to restrict the usage of the repository to warmed-up data.
+ */
+final class FailingProvider implements Provider
+{
+	public function provide(string $path): array
+	{
+		throw new LogicException("Only warmed-up data is available, tried to read from: $path");
+	}
+}

tests/Provider/FailingProviderTest.php

@@ -0,0 +1,23 @@
+<?php
+
+namespace Test\ICanBoogie\CLDR\Provider;
+
+use ICanBoogie\CLDR\Provider\FailingProvider;
+use LogicException;
+use PHPUnit\Framework\TestCase;
+
+/**
+ * @group static
+ */
+class FailingProviderTest extends TestCase
+{
+	public function test_provide(): void
+	{
+		$sut = new FailingProvider();
+
+		$this->expectException(LogicException::class);
+		$this->expectExceptionMessageMatches("/Only warmed-up data is available/");
+
+		$sut->provide("foo");
+	}
+}