Add validator tests for brewery and user commands (#282)

web/backend/Features/Features.Users.Tests/Commands/RefreshTokenValidatorTests.cs

@@ -0,0 +1,31 @@
+using Features.Users.Commands.Authentication.RefreshToken;
+using FluentValidation.TestHelper;
+
+namespace Features.Users.Tests.Commands;
+
+public class RefreshTokenValidatorTests
+{
+    private readonly RefreshTokenValidator _validator = new();
+
+    private static RefreshTokenCommand ValidCommand() => new("a-valid-refresh-token");
+
+    [Fact]
+    public void Validate_ValidCommand_HasNoValidationErrors()
+    {
+        TestValidationResult<RefreshTokenCommand> result = _validator.TestValidate(ValidCommand());
+
+        result.ShouldNotHaveAnyValidationErrors();
+    }
+
+    [Fact]
+    public void Validate_EmptyRefreshToken_HasErrorForRefreshToken()
+    {
+        RefreshTokenCommand command = ValidCommand() with { RefreshToken = "" };
+
+        TestValidationResult<RefreshTokenCommand> result = _validator.TestValidate(command);
+
+        result
+            .ShouldHaveValidationErrorFor(x => x.RefreshToken)
+            .WithErrorMessage("Refresh token is required");
+    }
+}