package civitas.functionaltests;
   
   import static org.junit.jupiter.api.Assertions.assertTrue;
   import static org.junit.jupiter.api.Assertions.fail;
   
   import java.util.Arrays;
   
   import org.junit.jupiter.api.DisplayName;
   import org.junit.jupiter.api.Tag;
  import org.junit.jupiter.api.Test;
  import org.junit.jupiter.api.extension.ExtendWith;
  import org.springframework.beans.factory.annotation.Autowired;
  import org.springframework.test.context.ContextConfiguration;
  import org.springframework.test.context.junit.jupiter.SpringExtension;
  
  import civitas.AppTestConfig;
  import civitas.crypto.algorithms.CreatePermutation;
  import civitas.crypto.rsaprivatekey.tests.PrivateKeyTestData;
  import civitas.util.tests.BasicValuesTestData;
  
  @Tag("functional")
  @ExtendWith(SpringExtension.class)
  @ContextConfiguration(classes = AppTestConfig.class)
  class CreatePermutationFunctionalTest implements PrivateKeyTestData, BasicValuesTestData {
  
  	@Autowired
  	CreatePermutation createPermutation;
  
  	@Test
  	@DisplayName("createPermutation creates a permutation of given size")
  	void createPermutation() {
  
  		int[] permutation = createPermutation.apply(SOME_SMALL_INT);
  		var hasIt = new boolean[SOME_SMALL_INT];
  		Arrays.fill(hasIt, false);
  		for (int i = 0; i < SOME_SMALL_INT; i++) {
  			hasIt[permutation[i]] = true;
  		}
  		for (int i = 0; i < SOME_SMALL_INT; i++) {
  			if (!hasIt[i]) {
  				fail();
  			}
  		}
  		assertTrue(true);
  	}
  }