added main classes

Raliway.Tests/EnsureExtensions/Satisfy.cs

@@ -0,0 +1,55 @@
+namespace Raliway.Tests.EnsureExtensions;
+
+public class Satisfy
+{
+    [Fact]
+    public void WhenRequirementWasSatisfied_ShouldBeSuccessful()
+    {
+        var result = Ensure.That(69)
+            .Satisfies(i => i < 100)
+            .Result();
+        
+        Assert.True(result.IsSuccess);
+        Assert.Equal(69, result.Value);
+    }
+    [Fact]
+    public void WhenRequirementWasNotSatisfied_ShouldBeFailureWithDefaultError()
+    {
+        var error = Error.New(Ensure.DefaultErrorType, "Value {69} does not satisfy the requirement.");
+        var result = Ensure.That(69)
+            .Satisfies(i => i > 100)
+            .Result();
+        
+        Assert.True(result.IsFailure);
+        Assert.Equal(error, result.Error);
+    }
+
+    [Fact]
+    public void WhenAllRequirementsWasSatisfied_ShouldBeSuccessful()
+    {
+        var result = Ensure.That<string?>("69")
+            .NotNull()
+            .NotEmpty()
+            .NotWhitespace()
+            .Satisfies(s => s == "69")
+            .Result();
+        
+        Assert.True(result.IsSuccess);
+        Assert.Equal("69", result.Value);
+    }
+
+    [Fact]
+    public void WhenAnyRequirementWasNotSatisfied_ShouldBeFailureWithFirstError()
+    {
+        var error = Error.New(Ensure.DefaultErrorType, "Value {(string?)\"   \"} is empty or consists exclusively of white-space characters.");
+        var result = Ensure.That((string?)"   ")
+            .NotNull()
+            .NotEmpty()
+            .NotWhitespace()
+            .Satisfies(s => s == "69")
+            .Result();
+        
+        Assert.True(result.IsFailure);
+        Assert.Equal(error, result.Error);
+    }
+}