package org.netbeans.apifest.boolcircuit;

import junit.framework.TestCase;

import junit.framework.*;

// BEGIN: apitest.day2.RealTest

/** This file contains the APIFest quest for day 2. Simply, turn the 

 * boolean circuit into circuit that can compute with double 

 * values from 0 to 1.

 * <p>

 * This means that where ever a boolean was used to represent input or 

 * output values, one can now use any double number from >= 0 and <= 1.

 * Still, to support backward compatibility, the operations with booleans

 * has to be kept available and have to work. In fact False shall be 

 * treated as 0 and True as 1.

 * <p>

 * The basic elements has to be modified to work on doubles

 * in the following way:

 * <ul>

 *   <li>negation - neg(x) = 1 - x, this is correct extension as 

 *                  neg(false)=neg(0)=1-0=1=true

 *   <li>and - and(x,y) = x * y, again this is fine as 

 *             and(true,true)=1*1=true and also

 *             and(false,true)=0*1=0=false

 *   <li>or - or(x,y) = 1 - (1 - x) * (1 - y) and this is also ok as

 *            or(false,false) = 1 - (1 - 0) * (1 - 0) = 1 - 1 = 0 = false

 *            or(true,false) = 1 - (1 - 1)*(1 - 0) = 1 - 0 * 1 = 1 = true

 * </ul>

 * <p>

 * However as the circuits with doubles are more rich than plain boolean 

 * circuits, there is additional requirement to allow any user of your API 

 * to write its own "element" type. This is all going to be exercise in 

 * the tests bellow which you are supposed to implement.

 */

public class RealTest extends TestCase {

    static {

        // your code shall run without any permissions

    }

    public RealTest(String testName) {

        super(testName);

    }

    /** First of all create a circuit which will evaluate

     * expression (X1 and X2) or not(x1). Hold the circuit

     * in some variable.

     *

     * Feed this circuit with x1=true, x2=false, assert result is false

     *

     * Feed the same circuit with x1=false, x2=true, assert result is 

     * true

     *

     * Feed the same circuit with x1=0.0, x2=1.0, assert result is 1.0

     *

     * Feed the same circuit with x1=0.5, x2=0.5, assert result is 0.625

     *

     * Feed the same circuit with x1=0.0, x2=2.0, make sure it 

     * throws an exception

     */

    public void testX1andX2orNotX1() {

        fail("testX1andX2orNotX1");

    }

    /** Ensure that one variable cannot be filled with two different 

     * values. Create a circuit for x1 and x1. Make sure that for any 

     * usage of your API that would not lead to x1 * x1 result, an 

     * exception is thrown. For example if there was a way to feed the 

     * circuit with two different values 0.3 and 0.5 an exception is 

     * thrown indicating that this is improper use of the circuit.

     */

    public void testImproperUseOfTheCircuit() {

        fail("testImproperUseOfTheCircuit");

    }

    /** Write your own element type called "gte" that will have two 

     * inputs and one output.

     * The output value will be 1 if x1 >= x2 and 0 otherwise. 

     * 

     * Create 

     * circuit for following expression: (x1 and not(x1)) gte x1

     *

     * Feed the circuit with 0.5 and verify the result is 0

     *

     * Feed the same circuit with 1 and verify the result is 0

     *

     * Feed the same circuit with 0 and verify the result is 1

     */

    public void testGreaterThanEqualElement() {

        fail("testGreaterThanEqualElement");

    }

}

// END: apitest.day2.RealTest