@@ -96,6 +96,31 @@ describe('Knapsack', () => {
9696 new KnapsackItem ( { value : 20 , weight : 2 } ) , // v/w ratio is 10
9797 ] ;
9898
99+ const maxKnapsackWeight = 15 ;
100+ 101+ const knapsack = new Knapsack ( possibleKnapsackItems , maxKnapsackWeight ) ;
102+ 103+ knapsack . solveUnboundedKnapsackProblem ( ) ;
104+ 105+ expect ( knapsack . totalValue ) . toBe ( 84 + 20 + 12 + 10 + 5 ) ;
106+ expect ( knapsack . totalWeight ) . toBe ( 15 ) ;
107+ expect ( knapsack . selectedItems . length ) . toBe ( 5 ) ;
108+ expect ( knapsack . selectedItems [ 0 ] . toString ( ) ) . toBe ( 'v84 w7 x 1' ) ;
109+ expect ( knapsack . selectedItems [ 1 ] . toString ( ) ) . toBe ( 'v20 w2 x 1' ) ;
110+ expect ( knapsack . selectedItems [ 2 ] . toString ( ) ) . toBe ( 'v10 w1 x 1' ) ;
111+ expect ( knapsack . selectedItems [ 3 ] . toString ( ) ) . toBe ( 'v12 w3 x 1' ) ;
112+ expect ( knapsack . selectedItems [ 4 ] . toString ( ) ) . toBe ( 'v5 w2 x 1' ) ;
113+ } ) ;
114+ 115+ it ( 'should solve unbound knapsack problem with items in stock' , ( ) => {
116+ const possibleKnapsackItems = [
117+ new KnapsackItem ( { value : 84 , weight : 7 , itemsInStock : 3 } ) , // v/w ratio is 12
118+ new KnapsackItem ( { value : 5 , weight : 2 , itemsInStock : 2 } ) , // v/w ratio is 2.5
119+ new KnapsackItem ( { value : 12 , weight : 3 , itemsInStock : 1 } ) , // v/w ratio is 4
120+ new KnapsackItem ( { value : 10 , weight : 1 , itemsInStock : 6 } ) , // v/w ratio is 10
121+ new KnapsackItem ( { value : 20 , weight : 2 , itemsInStock : 8 } ) , // v/w ratio is 10
122+ ] ;
123+ 99124 const maxKnapsackWeight = 17 ;
100125
101126 const knapsack = new Knapsack ( possibleKnapsackItems , maxKnapsackWeight ) ;
@@ -109,4 +134,29 @@ describe('Knapsack', () => {
109134 expect ( knapsack . selectedItems [ 1 ] . toString ( ) ) . toBe ( 'v20 w2 x 1' ) ;
110135 expect ( knapsack . selectedItems [ 2 ] . toString ( ) ) . toBe ( 'v10 w1 x 1' ) ;
111136 } ) ;
137+ 138+ it ( 'should solve unbound knapsack problem with items in stock and max weight more than sum of all items' , ( ) => {
139+ const possibleKnapsackItems = [
140+ new KnapsackItem ( { value : 84 , weight : 7 , itemsInStock : 3 } ) , // v/w ratio is 12
141+ new KnapsackItem ( { value : 5 , weight : 2 , itemsInStock : 2 } ) , // v/w ratio is 2.5
142+ new KnapsackItem ( { value : 12 , weight : 3 , itemsInStock : 1 } ) , // v/w ratio is 4
143+ new KnapsackItem ( { value : 10 , weight : 1 , itemsInStock : 6 } ) , // v/w ratio is 10
144+ new KnapsackItem ( { value : 20 , weight : 2 , itemsInStock : 8 } ) , // v/w ratio is 10
145+ ] ;
146+ 147+ const maxKnapsackWeight = 60 ;
148+ 149+ const knapsack = new Knapsack ( possibleKnapsackItems , maxKnapsackWeight ) ;
150+ 151+ knapsack . solveUnboundedKnapsackProblem ( ) ;
152+ 153+ expect ( knapsack . totalValue ) . toBe ( ( 3 * 84 ) + ( 2 * 5 ) + ( 1 * 12 ) + ( 6 * 10 ) + ( 8 * 20 ) ) ;
154+ expect ( knapsack . totalWeight ) . toBe ( ( 3 * 7 ) + ( 2 * 2 ) + ( 1 * 3 ) + ( 6 * 1 ) + ( 8 * 2 ) ) ;
155+ expect ( knapsack . selectedItems . length ) . toBe ( 5 ) ;
156+ expect ( knapsack . selectedItems [ 0 ] . toString ( ) ) . toBe ( 'v84 w7 x 3' ) ;
157+ expect ( knapsack . selectedItems [ 1 ] . toString ( ) ) . toBe ( 'v20 w2 x 8' ) ;
158+ expect ( knapsack . selectedItems [ 2 ] . toString ( ) ) . toBe ( 'v10 w1 x 6' ) ;
159+ expect ( knapsack . selectedItems [ 3 ] . toString ( ) ) . toBe ( 'v12 w3 x 1' ) ;
160+ expect ( knapsack . selectedItems [ 4 ] . toString ( ) ) . toBe ( 'v5 w2 x 2' ) ;
161+ } ) ;
112162} ) ;
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