package org.oxerr.commons.ws.rs.provider;
   
   import static org.junit.jupiter.api.Assertions.assertEquals;
   import static org.junit.jupiter.api.Assertions.assertNull;
   import static org.junit.jupiter.api.Assertions.assertThrows;
   
   import javax.ws.rs.ext.ParamConverter;
   
   import org.junit.jupiter.api.Test;
  
  class CharacterProviderTest {
  
  	private final CharacterProvider characterProvider = new CharacterProvider();
  
  	@Test
  	void testUnsupportedRawType() {
  		// Unsupported raw type
  		assertNull(this.characterProvider.getConverter(String.class, null, null));
  	}
  
  	@Test
  	void testFromString() {
  		ParamConverter<Character> c = this.characterProvider.getConverter(Character.class, null, null);
  
  		// null string
  		assertThrows(IllegalArgumentException.class, () -> c.fromString(null));
  
  		// empty string
  		assertNull(c.fromString(""));
  
  		// One character
  		assertEquals(Character.valueOf('a'), c.fromString("a"));
  
  		// First character should be return.
  		assertEquals(Character.valueOf('a'), c.fromString("ab"));
  
  	}
  
  	@Test
  	void testToString() {
  		ParamConverter<Character> c = this.characterProvider.getConverter(Character.class, null, null);
  
  		// null
  		assertThrows(IllegalArgumentException.class, () -> c.toString(null));
  
  		// char
  		assertEquals("a", c.toString('a'));
  
  		// Character
  		assertEquals("a", c.toString(Character.valueOf('a')));
  	}
  
  }