src/test/java/wtf/metio/reguloj/RuleEngineTCK.java

   1 /*
   2  * This file is part of reguloj. It is subject to the license terms in the LICENSE file found in the top-level
   3  * directory of this distribution and at https://creativecommons.org/publicdomain/zero/1.0/. No part of reguloj,
   4  * including this file, may be copied, modified, propagated, or distributed except according to the terms contained
   5  * in the LICENSE file.
   6  */
   7
   8 package wtf.metio.reguloj;
   9
  10 import static org.mockito.BDDMockito.given;
  11 import static org.mockito.Mockito.mock;
  12
  13 import java.util.List;
  14 import org.junit.jupiter.api.Assertions;
  15 import org.junit.jupiter.api.BeforeEach;
  16 import org.junit.jupiter.api.DisplayName;
  17 import org.junit.jupiter.api.Test;
  18
  19 abstract class RuleEngineTCK {
  20
  21   protected RuleEngine<Context<Object>> engine;
  22   protected Context<Object> context;
  23   protected Rule<Context<Object>> rule;
  24   protected Rule<Context<Object>> rule2;
  25
  26   protected abstract RuleEngine<Context<Object>> createRuleEngine();
  27
  28   @BeforeEach
  29   final void setup() {
  30     engine = createRuleEngine();
  31     context = mock(Context.class);
  32     rule = mock(Rule.class);
  33     rule2 = mock(Rule.class);
  34   }
  35
  36   @Test
  37   @DisplayName("does not fire for empty rules collection")
  38   final void shouldReturnFalseForEmptyRuleCollection() {
  39     final var rules = List.<Rule<Context<Object>>>of();
  40     final boolean fired = engine.analyze(rules, context);
  41     Assertions.assertFalse(fired);
  42   }
  43
  44   @Test
  45   @DisplayName("fire if any rule fires")
  46   final void shouldReturnTrueIfRuleFired() {
  47     given(rule.fires(context)).willReturn(Boolean.TRUE);
  48     final boolean fired = engine.analyze(List.of(rule), context);
  49     Assertions.assertTrue(fired);
  50   }
  51
  52   @Test
  53   @DisplayName("does not fire if no rule fires")
  54   final void shouldReturnFalseIfNoRuleFires() {
  55     given(rule.fires(context)).willReturn(Boolean.FALSE);
  56     final boolean fired = engine.analyze(List.of(rule), context);
  57     Assertions.assertFalse(fired);
  58   }
  59
  60   @Test
  61   @DisplayName("can infer with empty rule collection")
  62   final void shouldRunWithEmptyRuleSet() {
  63     final var rules = List.<Rule<Context<Object>>>of();
  64     engine.infer(rules, context);
  65   }
  66
  67 }