new dnd-character exercise (#203)

* new dnd-character exercise

* removed debugging line (belatedly)

config.json

@@ -342,6 +342,15 @@
         "prerequisites": [],
         "difficulty": 2
       },
+      {
+        "slug": "dnd-character",
+        "name": "Dnd Character",
+        "uuid": "4cfffba1-0f61-4c18-b2a2-7890c1465227",
+        "practices": [],
+        "prerequisites": [],
+        "difficulty": 1,
+        "topics": null
+      },
       {
         "slug": "all-your-base",
         "name": "All Your Base",

exercises/practice/dnd-character/.docs/instructions.md

@@ -0,0 +1,31 @@
+# Instructions
+
+For a game of [Dungeons & Dragons][dnd], each player starts by generating a character they can play with.
+This character has, among other things, six abilities; strength, dexterity, constitution, intelligence, wisdom and charisma.
+These six abilities have scores that are determined randomly.
+You do this by rolling four 6-sided dice and record the sum of the largest three dice.
+You do this six times, once for each ability.
+
+Your character's initial hitpoints are 10 + your character's constitution modifier.
+You find your character's constitution modifier by subtracting 10 from your character's constitution, divide by 2 and round down.
+
+Write a random character generator that follows the rules above.
+
+For example, the six throws of four dice may look like:
+
+- 5, 3, 1, 6: You discard the 1 and sum 5 + 3 + 6 = 14, which you assign to strength.
+- 3, 2, 5, 3: You discard the 2 and sum 3 + 5 + 3 = 11, which you assign to dexterity.
+- 1, 1, 1, 1: You discard the 1 and sum 1 + 1 + 1 = 3, which you assign to constitution.
+- 2, 1, 6, 6: You discard the 1 and sum 2 + 6 + 6 = 14, which you assign to intelligence.
+- 3, 5, 3, 4: You discard the 3 and sum 5 + 3 + 4 = 12, which you assign to wisdom.
+- 6, 6, 6, 6: You discard the 6 and sum 6 + 6 + 6 = 18, which you assign to charisma.
+
+Because constitution is 3, the constitution modifier is -4 and the hitpoints are 6.
+
+## Notes
+
+Most programming languages feature (pseudo-)random generators, but few programming languages are designed to roll dice.
+One such language is [Troll][troll].
+
+[dnd]: https://en.wikipedia.org/wiki/Dungeons_%26_Dragons
+[troll]: https://di.ku.dk/Ansatte/?pure=da%2Fpublications%2Ftroll-a-language-for-specifying-dicerolls(84a45ff0-068b-11df-825d-000ea68e967b)%2Fexport.html

exercises/practice/dnd-character/.meta/Example.cfc

@@ -0,0 +1,29 @@
+/**
+* Here is an example solution for the Dnd Character exercise
+*/
+component {
+
+    // simple implementation has disadvantage of breaking encapsulation
+	this.strength = ability();
+	this.dexterity = ability();
+	this.constitution = ability();
+	this.intelligence = ability();
+	this.wisdom = ability();
+	this.charisma = ability();
+	this.hitpoints = 10 + abilityModifier( this.constitution );
+
+	function abilityModifier( score ) {
+		return floor((score - 10) / 2)
+	}
+
+	function ability() {
+		var rolls = [roll(), roll(), roll(), roll()];
+		arraySort(rolls, 'numeric', 'desc');
+		return rolls.slice(1, 3).sum();
+	}
+
+	private function roll() {
+		return randRange(1, 6);
+	}
+
+}

exercises/practice/dnd-character/.meta/ExampleTest.cfc

@@ -0,0 +1,7 @@
+component extends="DndCharacterTest" {
+
+	function beforeAll(){
+	  SUT = createObject( 'Solution' );
+	}
+
+}

exercises/practice/dnd-character/.meta/config.json

@@ -0,0 +1,17 @@
+{
+  "authors": ["colinleach"],
+  "files": {
+    "solution": [
+      "DndCharacter.cfc"
+    ],
+    "test": [
+      "DndCharacterTest.cfc"
+    ],
+    "example": [
+      ".meta/Example.cfc"
+    ]
+  },
+  "blurb": "Randomly generate Dungeons & Dragons characters.",
+  "source": "Simon Shine, Erik Schierboom",
+  "source_url": "https://github.com/exercism/problem-specifications/issues/616#issuecomment-437358945"
+}

exercises/practice/dnd-character/.meta/tests.toml

@@ -0,0 +1,67 @@
+# This is an auto-generated file.
+#
+# Regenerating this file via `configlet sync` will:
+# - Recreate every `description` key/value pair
+# - Recreate every `reimplements` key/value pair, where they exist in problem-specifications
+# - Remove any `include = true` key/value pair (an omitted `include` key implies inclusion)
+# - Preserve any other key/value pair
+#
+# As user-added comments (using the # character) will be removed when this file
+# is regenerated, comments can be added via a `comment` key.
+
+[1e9ae1dc-35bd-43ba-aa08-e4b94c20fa37]
+description = "ability modifier -> ability modifier for score 3 is -4"
+
+[cc9bb24e-56b8-4e9e-989d-a0d1a29ebb9c]
+description = "ability modifier -> ability modifier for score 4 is -3"
+
+[5b519fcd-6946-41ee-91fe-34b4f9808326]
+description = "ability modifier -> ability modifier for score 5 is -3"
+
+[dc2913bd-6d7a-402e-b1e2-6d568b1cbe21]
+description = "ability modifier -> ability modifier for score 6 is -2"
+
+[099440f5-0d66-4b1a-8a10-8f3a03cc499f]
+description = "ability modifier -> ability modifier for score 7 is -2"
+
+[cfda6e5c-3489-42f0-b22b-4acb47084df0]
+description = "ability modifier -> ability modifier for score 8 is -1"
+
+[c70f0507-fa7e-4228-8463-858bfbba1754]
+description = "ability modifier -> ability modifier for score 9 is -1"
+
+[6f4e6c88-1cd9-46a0-92b8-db4a99b372f7]
+description = "ability modifier -> ability modifier for score 10 is 0"
+
+[e00d9e5c-63c8-413f-879d-cd9be9697097]
+description = "ability modifier -> ability modifier for score 11 is 0"
+
+[eea06f3c-8de0-45e7-9d9d-b8cab4179715]
+description = "ability modifier -> ability modifier for score 12 is +1"
+
+[9c51f6be-db72-4af7-92ac-b293a02c0dcd]
+description = "ability modifier -> ability modifier for score 13 is +1"
+
+[94053a5d-53b6-4efc-b669-a8b5098f7762]
+description = "ability modifier -> ability modifier for score 14 is +2"
+
+[8c33e7ca-3f9f-4820-8ab3-65f2c9e2f0e2]
+description = "ability modifier -> ability modifier for score 15 is +2"
+
+[c3ec871e-1791-44d0-b3cc-77e5fb4cd33d]
+description = "ability modifier -> ability modifier for score 16 is +3"
+
+[3d053cee-2888-4616-b9fd-602a3b1efff4]
+description = "ability modifier -> ability modifier for score 17 is +3"
+
+[bafd997a-e852-4e56-9f65-14b60261faee]
+description = "ability modifier -> ability modifier for score 18 is +4"
+
+[4f28f19c-2e47-4453-a46a-c0d365259c14]
+description = "random ability is within range"
+
+[385d7e72-864f-4e88-8279-81a7d75b04ad]
+description = "random character is valid"
+
+[2ca77b9b-c099-46c3-a02c-0d0f68ffa0fe]
+description = "each ability is only calculated once"

exercises/practice/dnd-character/DndCharacter.cfc

@@ -0,0 +1,15 @@
+/**
+* Your implementation of the Dnd Character exercise
+*/
+component {
+	// Implement strength, dexterity, constitution, wisdom, charisma, hitpoints
+
+	function abilityModifier( score ) {
+		// Implement me here
+	}
+
+	function ability() {
+		// Implement me here
+	}
+
+}

exercises/practice/dnd-character/DndCharacterTest.cfc

@@ -0,0 +1,75 @@
+component extends="testbox.system.BaseSpec" {
+
+	function beforeAll(){
+	  SUT = createObject( 'DndCharacter' );
+	}
+
+	function inRange( score ) {
+		return score >= 3 && score <= 18;
+	}
+
+	function run(){
+
+		describe( "My Dnd Character class", function(){			
+
+			describe( 'ability modifier', function(){
+
+				it( 'ability modifier for score 3 is -4', function(){
+					expect( SUT.abilityModifier( 3 ) ).toBe( -4 );
+				});
+
+				it( 'ability modifier for score 4 is -43', function(){
+					expect( SUT.abilityModifier( 4 ) ).toBe( -3 );
+				});
+
+				it( 'ability modifier for score 5 is -3', function(){
+					expect( SUT.abilityModifier( 5 ) ).toBe( -3 );
+				});
+
+				it( 'ability modifier for score 6 is -2', function(){
+					expect( SUT.abilityModifier( 6 ) ).toBe( -2 );
+				});
+
+				it( 'ability modifier for score 7 is -2', function(){
+					expect( SUT.abilityModifier( 7 ) ).toBe( -2 );
+				});
+
+				it( 'ability modifier for score 8 is -1', function(){
+					expect( SUT.abilityModifier( 8 ) ).toBe( -1 );
+				});
+			});
+
+			describe( 'random', function(){
+
+				it( 'random ability is within range', function(){
+					for (i=1; i<=10; i++) {
+						expect( SUT.ability() ).toSatisfy( inRange );
+					}
+				});
+
+				it( 'random character is valid', function(){
+					for (i=1; i<=10; i++) {
+						expect( SUT.strength ).toSatisfy( inRange );
+						expect( SUT.dexterity ).toSatisfy( inRange );
+						expect( SUT.constitution ).toSatisfy( inRange );
+						expect( SUT.intelligence ).toSatisfy( inRange );
+						expect( SUT.wisdom ).toSatisfy( inRange );
+						expect( SUT.charisma ).toSatisfy( inRange );
+						expect( SUT.hitpoints ).toBe( 10 + SUT.abilityModifier( SUT.constitution ))
+					}
+				});
+
+				it( 'each ability is only calculated once', function(){
+					expect( SUT.strength ).toBe( SUT.strength );
+					expect( SUT.dexterity ).toBe( SUT.dexterity );
+					expect( SUT.constitution ).toBe( SUT.constitution );
+					expect( SUT.intelligence ).toBe( SUT.intelligence );
+					expect( SUT.wisdom ).toBe( SUT.wisdom );
+					expect( SUT.charisma ).toBe( SUT.charisma );
+				});
+
+			});
+
+		});
+	}
+}

exercises/practice/dnd-character/TestRunner.cfc

@@ -0,0 +1,103 @@
+/**
+* I am a CommandBox task runner which you can use to test your implementation of this exercise against the 
+* provided test suite.  To use me, open the CommandBox CLI and run this:
+* 
+* CommandBox> task run TestRunner
+*
+* To start up a test watcher that will automatically rerun the test suite every time you save a file change, run this:
+*
+* CommandBox> task run TestRunner --watcher
+*
+*/
+component {
+
+	/**
+	* @solution Runs the tests against the solution
+	* @watcher Start up a file watch that re-runs the tests on file changes. Use Ctrl-C to stop
+	*/
+	function run( boolean solution=false, boolean watcher=false ) {
+
+		ensureTestBox();
+
+		if( watcher ) {
+
+			// Tabula rasa
+			command( 'cls' ).run();
+
+			// Start watcher
+			watch()
+				.paths( '*.cfc' )
+				.inDirectory( getCWD() )
+				.withDelay( 500 )
+				.onChange( function() {
+
+					// Clear the screen
+					command( 'cls' )
+						.run();
+
+					// This is neccessary so changes to tests get picked up right away.
+					pagePoolClear();	
+
+					runTests( solution );
+
+				} )
+				.start();
+
+		} else {
+			runTests( solution );
+		}			
+
+	}
+
+	/**
+	* Make sure the TestBox framework is installed
+	*/
+	private function ensureTestBox() {
+		var excerciseRoot = getCWD();
+		var testBoxRoot = excerciseRoot & '/testbox';
+
+		if( !directoryExists( testBoxRoot ) ) {
+
+			print.boldYellowLine( 'Installing some missing dependencies for you!' ).toConsole();
+			command( 'install' )
+				.inWorkingDirectory( excerciseRoot )
+				.run();
+		}
+
+		// Bootstrap TestBox framework
+		filesystemUtil.createMapping( '/testbox', testBoxRoot );
+	}
+
+	/**
+	* Invoke TestBox to run the test suite
+	*/
+	private function runTests( boolean solution=false ) {
+
+		// Create TestBox and run the tests
+		testData = new testbox.system.TestBox()
+			.runRaw( directory = {
+				// Find all CFCs...
+				mapping = filesystemUtil.makePathRelative( getCWD() ),
+				// ... in this directory ...
+				recurse = false,
+				// ... whose name ends in "test"
+				filter = function( path ) {
+					return path.reFind( ( solution ? 'Solution' : '' ) & 'Test.cfc$' );
+				 }
+			} )
+			.getMemento();
+
+		// Print out the results with ANSI formatting for the CLI
+		getInstance( 'CLIRenderer@testbox-commands' )
+			.render( print, testData, true );
+
+		print.toConsole();
+
+		// Set proper exit code
+		if( testData.totalFail || testData.totalError ) {
+			setExitCode( 1 );
+		}
+	}
+
+}
+

exercises/practice/dnd-character/box.json

@@ -0,0 +1,8 @@
+{
+    "dependencies":{
+        "testbox":"^2.5.0+107"
+    },
+    "installPaths":{
+        "testbox":"testbox/"
+    }
+}