AdventOfCode 2023 Day05 Part1

AdventOfCode2023.Tests/Day05_Tests.cs

@@ -0,0 +1,92 @@
+namespace AdventOfCode2023.Tests;
+
+public class Day05_Tests
+{
+    private readonly string[] _example = {
+        "seeds: 79 14 55 13",
+        "",
+        "seed-to-soil map:",
+        "50 98 2",
+        "52 50 48",
+        "",
+        "soil-to-fertilizer map:",
+        "0 15 37",
+        "37 52 2",
+        "39 0 15",
+        "",
+        "fertilizer-to-water map:",
+        "49 53 8",
+        "0 11 42",
+        "42 0 7",
+        "57 7 4",
+        "",
+        "water-to-light map:",
+        "88 18 7",
+        "18 25 70",
+        "",
+        "light-to-temperature map:",
+        "45 77 23",
+        "81 45 19",
+        "68 64 13",
+        "",
+        "temperature-to-humidity map:",
+        "0 69 1",
+        "1 0 69",
+        "",
+        "humidity-to-location map:",
+        "60 56 37",
+        "56 93 4",
+    };
+
+    [Fact]
+    public void ResolvePart1__Example()
+    {
+        Day05 day = new();
+        
+        string result = day.ResolvePart1(_example);
+
+        Assert.Equal("35", result);
+    }
+
+    [Fact]
+    public void AlamanacMapping_ParseNext__Empty__Null()
+    {
+        Day05.LinesReader reader = new(Array.Empty<string>());
+        Day05.AlmanacMapping? mapping = Day05.AlmanacMapping.ParseNext(reader);
+        
+        Assert.Null(mapping);
+    }
+    
+    [Fact]
+    public void AlamanacMapping_ParseNext__Example1()
+    {
+        Day05.LinesReader reader = new(new[] { 
+            "seed-to-soil map:",
+            "50 98 2",
+            "52 50 48",
+        });
+        Day05.AlmanacMapping? mapping = Day05.AlmanacMapping.ParseNext(reader);
+        
+        Assert.NotNull(mapping);
+        Assert.Equal("seed-to-soil", mapping.Name);
+        Assert.Equal(2, mapping.RangeMappings.Count);
+        Assert.Equal(50, mapping.RangeMappings[0].DestinationStart);
+        Assert.Equal(98, mapping.RangeMappings[0].OriginStart);
+        Assert.Equal(2, mapping.RangeMappings[0].Lenght);
+        Assert.Equal(52, mapping.RangeMappings[1].DestinationStart);
+        Assert.Equal(50, mapping.RangeMappings[1].OriginStart);
+        Assert.Equal(48, mapping.RangeMappings[1].Lenght);
+
+        long value1 = 100;
+        long valueMapped1 = mapping.Apply(value1);
+        Assert.Equal(100, valueMapped1);
+        
+        long value2 = 99;
+        long valueMapped2 = mapping.Apply(value2);
+        Assert.Equal(51, valueMapped2);
+        
+        long value3 = 45;
+        long valueMapped3 = mapping.Apply(value3);
+        Assert.Equal(45, valueMapped3);
+    }
+}