code: package com.github.sulir.runtimesearch.plugin.config;
  
  import com.intellij.ui.classFilter.ClassFilter;
  import org.junit.jupiter.api.BeforeEach;
  import org.junit.jupiter.api.Test;
  
  import static org.junit.jupiter.api.Assertions.*;
  
  class RuntimeSearchSettingsTest {
      RuntimeSearchSettings settings;
  
      @BeforeEach
      void setUp() {
          settings = new RuntimeSearchSettings();
      }
  
      @Test
      void emptyIncludeFilterProducesEmptyPattern() {
          settings.setIncludeFilters(ClassFilter.EMPTY_ARRAY);
          assertEquals("", settings.getIncludePattern());
      }
  
      @Test
      void onePackageFilterWithWildcardProducesRegexPattern() {
          settings.setIncludeFilters(new ClassFilter[] { new ClassFilter("com.package.*") });
          assertEquals("com\\.package\\..*", settings.getIncludePattern());
      }
  
      @Test
      void twoClassFilterProducesRegexWithPipe() {
          settings.setIncludeFilters(new ClassFilter[] { new ClassFilter("one.One"), new ClassFilter("two.Two") });
          assertEquals("one\\.One|two\\.Two", settings.getIncludePattern());
      }
  }