class ResistorColorDuo {

private enum Color {

black, brown, red, orange, yellow, green, blue, violet, grey, white;

};

int value(String[] colors) {

return 10 * Color.valueOf(colors[0]).ordinal() + Color.valueOf(colors[1]).ordinal();

}

}

2.1.0

If you want to build something using a Raspberry Pi, you'll probably use _resistors_. For this exercise, you need to know two things about them:

* Each resistor has a resistance value.

* Resistors are small - so small in fact that if you printed the resistance value on them, it would be hard to read.

To get around this problem, manufacturers print color-coded bands onto the resistors to denote their resistance values. Each band has a position and a numeric value. For example, if they printed a brown band (value 1) followed by a green band (value 5), it would translate to the number 15.

In this exercise you are going to create a helpful program so that you don't have to remember the values of the bands. The program will take color names as input and output a two digit number, even if the input is more than two colors!

The band colors are encoded as follows:

- Black: 0

- Brown: 1

- Red: 2

- Orange: 3

- Yellow: 4

- Green: 5

- Blue: 6

- Violet: 7

- Grey: 8

- White: 9

From the example above:

brown-green should return 15

brown-green-violet should return 15 too, ignoring the third color.

Go through the setup instructions for Java to install the necessary

dependencies:

You can run all the tests for an exercise by entering the following in your

terminal:

$ gradle test

In the test suites all tests but the first have been skipped.

Once you get a test passing, you can enable the next one by removing the

`@Ignore("Remove to run test")` annotation.

Maud de Vries, Erik Schierboom [https://github.com/exercism/problem-specifications/issues/1464](https://github.com/exercism/problem-specifications/issues/1464)

It's possible to submit an incomplete solution so you can see how others have

completed the exercise.

apply plugin: "java"

apply plugin: "eclipse"

apply plugin: "idea"

repositories {

mavenCentral()

}

dependencies {

testCompile "junit:junit:4.12"

}

test {

testLogging {

exceptionFormat = 'full'

events = ["passed", "failed", "skipped"]

}

}

class ResistorColorDuo {

int value(String[] colors) {

throw new UnsupportedOperationException("Delete this statement and write your own implementation.");

}

}

import org.junit.Before;

import org.junit.Test;

import org.junit.Ignore;

import static org.junit.Assert.assertEquals;

public class ResistorColorDuoTest {

private ResistorColorDuo resistorColorDuo;

@Before

public void setup() {

resistorColorDuo = new ResistorColorDuo();

}

@Test

public void testBrownAndBlack() {

String[] input = { "brown", "black" };

int expected = 10;

int actual = resistorColorDuo.value(input);

assertEquals(expected, actual);

}

@Ignore("Remove to run test")

@Test

public void testBlueAndGrey() {

String[] input = { "blue", "grey" };

int expected = 68;

int actual = resistorColorDuo.value(input);

assertEquals(expected, actual);

}

@Ignore("Remove to run test")

@Test

public void testYellowAndViolet() {

String[] input = { "yellow", "violet" };

int expected = 47;

int actual = resistorColorDuo.value(input);

assertEquals(expected, actual);

}

@Ignore("Remove to run test")

@Test

public void testOrangeAndOrange() {

String[] input = { "orange", "orange" };

int expected = 33;

int actual = resistorColorDuo.value(input);

assertEquals(expected, actual);

}

@Ignore("Remove to run test")

@Test

public void testIgnoreAdditionalColors() {

String[] input = { "green", "brown", "orange" };

int expected = 51;

int actual = resistorColorDuo.value(input);

assertEquals(expected, actual);

}

}

include 'resistor-color-duo'