In order to launch the test, we'll need PHP version 7.1 installed in our machine.
Prepare the project with the following command in the root directory of the repository:
php phars/composer.phar install
Make sure everything is ok launching all the test suite:
php phars/phpunit.phar
There are two ways of launching the Mower Kata:
Just launch the following command:
php phars/phpunit.phar tests/Integration
The integration test will throw the kata using the file INPUT_TEST_CASE.txt. You can change the input file within the same test, editing the test case.
There's an script in the root folder of the repository which can be used to start the process:
php init.php
When invoking this script without parameters, the file INPUT_TEST_CASE.txt will be used as the default input file. But you can pass a file as a parameter in order to customize the input of the test as shown:
php init.php custom_test_case.txt
We need to develop an application that helps in controlling brand new mowers from our facility. We have rolled out brand new robotic mowers that are able to cut the grass and to inspect the terrain with their cameras to identify problems in the green areas.
Our facility has a lot of green spaces but for the MVP, we will consider only one single green grass plateau to simply the problem.
A green grass plateau, which is curiously rectangular, must be navigated by the mowers so they can cut the grass and that their on-board cameras can get a complete view of the surrounding terrain to send to the Facility Maintenance Office.
A mower’s position and location are represented by a combination of X and Y coordinates and a letter representing one of the four cardinal compass points (N, E, S, W). The plateau is divided up into a grid to simplify navigation. An example position might be 0, 0, N, which means the mower is in the bottom left corner and facing North.
In order to control a mower, the Facility Maintenance Office sends a simple string of letters. The possible letters are “L”, “R” and ”M”. “L” and “R” make the mower spin 90 degrees left or right respectively, without moving from its current spot. “M” means to move forward one grid point and maintain the same Heading.
Assume that the square directly North from (X, Y) is (X, Y + 1).
The first line of input is the upper-right coordinates of the plateau, the bottom-left coordinates are assumed to be 0, 0.
The rest of the input is information pertaining to the mowers that have been deployed. Each mower has two lines of input. The first line gives the mower’s position, and the second line is a series of instructions telling the mower how to explore the plateau. The position is made up of two integers and a letter separated by spaces, corresponding to the X and Y coordinates and the mower’s orientation.
Each mower will be finished sequentially, which means that the second mower won’t start to move until the first one has finished moving.
The output for each mower should be its final coordinates and heading.
Input Test Case #1:
5 5
1 2 N
LMLMLMLMM
3 3 E
MMRMMRMRRM
Output Test Case #1:
1 3 N
5 1 E