package beginner;

import static com.sandwich.koan.constant.KoanConstants.__;

import static com.sandwich.util.Assert.assertEquals;

import com.sandwich.koan.Koan;

public class AboutVarArgs {

class ExampleClass {

public boolean canBeTreatedAsArray(Integer... arguments) { return arguments instanceof Integer[]; }

public int getLength(Integer... arguments) { return arguments.length; }

public String verboseLength(String prefix, Object... arguments) { return prefix + arguments.length; }

// *******

// The following methods won't compile because Java doesn't allow this type of method declaration

// *******

// public String invalidMethodDeclaration(String... arguments, String... otherArguments) { return ""; }

// public String otherInvalidMethodDeclaration(String... arguments, String otherArgument) { return ""; }

}

@Koan

public void varArgsCanBeTreatedAsArrays() {

assertEquals(new ExampleClass().canBeTreatedAsArray(1, 2, 3), __);

}

@Koan

public void youCanPassInAsManyArgumentsAsYouLike() {

assertEquals(new ExampleClass().getLength(1, 2, 3), __);

assertEquals(new ExampleClass().getLength(1, 2, 3, 4, 5, 6, 7, 8), __);

}

@Koan

public void youCanPassInZeroArgumentsIfYouLike() {

assertEquals(new ExampleClass().getLength(), __);

}

@Koan

public void youCanHaveOtherTypesInTheMethodSignature() {

assertEquals(new ExampleClass().verboseLength("This is how many items were passed in: ", 1, 2, 3, 4),

__);

}

}