Add Day 07 solution

AoC_2025.Tests/Day07Test.cs

@@ -0,0 +1,47 @@
+using AdvenOfCode.Contracts;
+
+namespace AoC_2025.Tests;
+
+public class Day07Test
+{
+    private readonly IPuzzleSolver<long> _sut;
+    private static readonly string rootPath = Environment.GetFolderPath(Environment.SpecialFolder.MyDocuments);
+    private readonly string TestInputPath = @$"{rootPath}\AoC-PuzzleInputs\2025\Test\day07.txt";
+    private readonly string ProdInputPath = @$"{rootPath}\AoC-PuzzleInputs\2025\Prod\day07.txt";
+    
+    public Day07Test()
+    {
+        _sut = new Day07();
+    }
+    [Fact]
+    public void Part01_Test_equals_21()
+    {
+        var actual = _sut.SolvePart1(TestInputPath);
+        
+        Assert.Equal(21, actual);
+    }
+    
+    [Fact]
+    public void Part01_Prod_equals_1658()
+    {
+        var actual = _sut.SolvePart1(ProdInputPath);
+        
+        Assert.Equal(1658, actual);
+    }
+    
+    [Fact]
+    public void Part02_Test_equals_40()
+    {
+        var actual = _sut.SolvePart2(TestInputPath);
+        
+        Assert.Equal(40, actual);
+    }
+    
+    [Fact]
+    public void Part02_Prod_equals_53916299384254()
+    {
+        var actual = _sut.SolvePart2(ProdInputPath);
+        
+        Assert.Equal(53916299384254, actual);
+    }
+}