Add new CraftingPlan class

test/crafting/crafting_plan.test.coffee

@@ -0,0 +1,49 @@
+###
+Crafting Guide - crafting_plan.test.coffee
+
+Copyright (c) 2015 by Redwood Labs
+All rights reserved.
+###
+
+CraftingPlan = require '../../src/coffee/models/crafting/crafting_plan'
+fixtures     = require './fixtures'
+
+########################################################################################################################
+
+describe 'crafting_plan.coffee', ->
+
+    it 'requires wanted item if gatherable', ->
+        plans = fixtures.makePlans [1, 'test__coal']
+        plans.length.should.equal 1
+
+        plan = plans[0]
+        plan.required.unparse().should.equal 'coal'
+        plan.produced.unparse().should.equal 'coal'
+
+    it 'can compute a single item with a single step', ->
+        plans = fixtures.makePlans [1, 'test__charcoal']
+        plans.length.should.equal 1
+
+        plan = plans[0]
+        plan.required.unparse().should.equal 'coal:8.oak_wood'
+        plan.produced.unparse().should.equal '8.charcoal'
+
+    it 'can compute a large quantity of a single item with a single step', ->
+        plans = fixtures.makePlans [15, 'test__charcoal']
+        plans.length.should.equal 1
+
+        plan = plans[0]
+        plan.required.unparse().should.equal '2.coal:16.oak_wood'
+        plan.produced.unparse().should.equal '16.charcoal'
+
+    it 'can compute a single item with multiple steps', ->
+        plans = fixtures.makePlans [1, 'test__iron_ingot']
+        plans.length.should.equal 2
+
+        plan = plans[0]
+        plan.required.unparse().should.equal 'coal:8.iron_ore:8.oak_wood'
+        plan.produced.unparse().should.equal '7.charcoal:iron_ingot'
+
+        plan = plans[1]
+        plan.required.unparse().should.equal 'coal:8.iron_ore'
+        plan.produced.unparse().should.equal 'iron_ingot'

test/crafting/fixtures.coffee

@@ -10,6 +10,7 @@ ItemSlug     = require '../../src/coffee/models/item_slug'
 Mod          = require '../../src/coffee/models/mod'
 ModPack      = require '../../src/coffee/models/mod_pack'
 ModVersion   = require '../../src/coffee/models/mod_version'
+PlanBuilder  = require '../../src/coffee/models/crafting/plan_builder'
 
 ########################################################################################################################
 
@@ -21,6 +22,7 @@ MOD_VERSION_FILE =
         recipe:
             input: 8 Oak Wood, Coal
             pattern: .0. ... .1.
+            quantity: 8
 
     item: Crafting Table
         recipe:
@@ -100,6 +102,9 @@ MOD_VERSION_FILE =
 
 module.exports = fixtures =
 
+    makeGraphBuilder: ->
+        return new GraphBuilder modPack:fixtures.makeModPack()
+
     makeModPack: ->
         modPack = new ModPack
 
@@ -112,10 +117,18 @@ module.exports = fixtures =
 
         return modPack
 
-    makeGraphBuilder: ->
-        return new GraphBuilder modPack:fixtures.makeModPack()
+    makePlans: (stacks...)->
+        modPack = fixtures.makeModPack()
 
-    makeTree: (itemSlug)->
+        graphBuilder = fixtures.makeGraphBuilder()
+        for stack in stacks
+            graphBuilder.wanted.add ItemSlug.slugify(stack[1]), stack[0]
+        graphBuilder.expandGraph()
+
+        planBuilder = new PlanBuilder graphBuilder.rootNode, wanted:graphBuilder.wanted
+        return planBuilder.producePlans()
+
+    makeTree: (itemSlug, quantity=1)->
         builder = fixtures.makeGraphBuilder()
         builder.wanted.add ItemSlug.slugify itemSlug
         builder.expandGraph()

test/crafting/plan_builder.test.coffee

@@ -13,13 +13,14 @@ PlanBuilder = require '../../src/coffee/models/crafting/plan_builder'
 describe 'plan_builder.coffee', ->
 
     printPlan = (plan)->
-        return ((s.slug.replace(/^.*>.*>/, '') for s in plan)).join ' > '
+        return ((s.slug.replace(/^.*>.*>/, '') for s in plan.steps;;)).join ' > '
 
-    it 'generates no plans for a gatherable item', ->
+    it 'generates an empty plan for a gatherable item', ->
         builder = new PlanBuilder fixtures.makeTree 'test__oak_wood'
         plans = builder.producePlans 100
 
-        plans.length.should.equal 0
+        plans.length.should.equal 1
+        plans[0].length.should.equal 0
         builder.complete.should.be.true
 
     it 'can find a multi-step plan', ->
@@ -34,5 +35,5 @@ describe 'plan_builder.coffee', ->
         builder = new PlanBuilder fixtures.makeTree 'test__iron_ingot'
         plans = builder.producePlans 100
 
-        printPlan(plans[0]).should.equal 'test__charcoal > test__iron_ingot'
+        printPlan(plans[0]).should.equal '8 test__charcoal > test__iron_ingot'
         printPlan(plans[1]).should.equal 'test__iron_ingot'