@@ -55,5 +55,37 @@ describe('--- 2019 Day 3: Crossed Wires ---', () => {
5555 expect ( getClosesetIntersection ( findWireIntersections ( wires ) ) . distance ) . to . equal ( distances [ idx ] )
5656 } )
5757 } )
58+ describe ( 'getIntersectionWireDistance()' , ( ) => {
59+ it ( 'calculates the summed total wire length to reach the specified intersection' , ( ) => {
60+ const wires = [
61+ 'R8,U5,L5,D3' ,
62+ 'U7,R6,D4,L4'
63+ ]
64+ const expected = [
65+ 40 , 30
66+ ]
67+ const intersections = findWireIntersections ( ...wires )
68+ const actual = intersections . map ( ( inter ) => getIntersectionWireDistance ( { wires, intersection :inter } ) )
69+ expect ( actual ) . to . deep . equal ( expected )
70+ } )
71+ } )
72+ describe ( 'getClosestIntersectionByWire()' , ( ) => {
73+ it ( 'can be used to find the wire distance to the closest intersection' , ( ) => {
74+ const wiresets = [
75+ [
76+ 'R75,D30,R83,U83,L12,D49,R71,U7,L72' ,
77+ 'U62,R66,U55,R34,D71,R55,D58,R83'
78+ ] , [
79+ 'R98,U47,R26,D63,R33,U87,L62,D20,R33,U53,R51' ,
80+ 'U98,R91,D20,R16,D67,R40,U7,R15,U6,R7'
81+ ]
82+ ]
83+ const distances = [ 610 , 410 ]
84+ wiresets . forEach ( ( wires , idx ) => {
85+ const intersections = findWireIntersections ( wires )
86+ expect ( getClosesetIntersectionByWire ( { intersections, wires } ) . distance ) . to . equal ( distances [ idx ] )
87+ } )
88+ } )
89+ } )
5890 } )
5991} )
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