feat(core): add password hashing and token generation interfaces

tests/FiscalOS.Infra.Tests/Assertions/JwtTokenAssertions.cs

@@ -0,0 +1,45 @@
+namespace FiscalOS.Infra.Tests.Assertions;
+
+internal static class JwtTokenAssertionExtensions
+{
+  public static AndConstraint<string> HaveClaim(
+    this StringAssertions assertions,
+    string claimType
+  )
+  {
+    var handler = new JwtSecurityTokenHandler();
+    var jwtToken = handler.ReadJwtToken(assertions.Subject);
+
+    var claim = jwtToken.Claims.FirstOrDefault(c => c.Type == claimType);
+
+    assertions.CurrentAssertionChain
+      .ForCondition(claim is not null)
+      .FailWith($"Expected JWT token to have claim '{claimType}', but it was not found.");
+
+    return new AndConstraint<string>(assertions.Subject);
+  }
+
+  public static AndConstraint<string> HaveClaimWithValue(
+    this StringAssertions assertions,
+    string claimType,
+    string expectedValue
+  )
+  {
+    var handler = new JwtSecurityTokenHandler();
+    var jwtToken = handler.ReadJwtToken(assertions.Subject);
+
+    var claim = jwtToken.Claims.FirstOrDefault(c => c.Type == claimType);
+
+    assertions.CurrentAssertionChain
+      .ForCondition(claim is not null)
+      .FailWith($"Expected JWT token to have claim '{claimType}', but it was not found.");
+
+    assertions.CurrentAssertionChain
+      .ForCondition(claim!.Value == expectedValue)
+      .FailWith(
+        $"Expected JWT token claim '{claimType}' to have value '{expectedValue}', but found '{claim.Value}'."
+      );
+
+    return new AndConstraint<string>(assertions.Subject);
+  }
+}