public function testGettingValueIsDelegatedToClient()
 {
     $key = 'key';
     $value = 'value';
     $this->mockClient->method('get')->with($key)->willReturn($value);
     $this->assertEquals($value, $this->store->get($key));
 }
 public function testExceptionIsThrownIfValueIsNotSet()
 {
     $this->expectException(KeyNotFoundException::class);
     $this->assertFalse($this->keyValueStore->get('foo'));
 }