tests: Add tests

test/minitest/assertions/result_assertions_test.rb

@@ -0,0 +1,30 @@
+# typed: true
+
+require "test_helper"
+
+class ResultAssertionsTest < Minitest::Test
+  def setup
+    @success = Typed::Success.new("Test Payload")
+    @failure = Typed::Failure.new("Test Error")
+  end
+
+  def test_success_assertions
+    assert_success(@success)
+    refute_success(@failure)
+  end
+
+  def test_failure_assertions
+    assert_failure(@failure)
+    refute_failure(@success)
+  end
+
+  def test_payload_assertions
+    assert_payload("Test Payload", @success)
+    refute_payload("Payload", @success)
+  end
+
+  def test_error_assertions
+    assert_error("Test Error", @failure)
+    refute_error("Error", @failure)
+  end
+end

test/test_helper.rb

@@ -2,6 +2,7 @@
 # frozen_string_literal: true
 
 require "minitest/autorun"
+require "minitest/result_assertions"
 
 require "debug"