| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, |
| * software distributed under the License is distributed on an |
| * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| * KIND, either express or implied. See the License for the |
| * specific language governing permissions and limitations |
| * under the License. |
| */ |
| package org.apache.opennlp.utils.cfg; |
| |
| import java.util.Arrays; |
| import java.util.Collections; |
| import org.junit.Test; |
| |
| import static org.junit.Assert.assertNotNull; |
| import static org.junit.Assert.fail; |
| |
| /** |
| * Testcase for {@link org.apache.opennlp.utils.cfg.CFGBuilder} |
| */ |
| public class CFGBuilderTest { |
| |
| @Test |
| public void testVoidBuild() throws Exception { |
| CFGBuilder builder = CFGBuilder.createCFG(); |
| assertNotNull(builder); |
| try { |
| builder.build(); |
| fail("cannot build a grammar without V, ∑, R and S"); |
| } catch (AssertionError e) { |
| // expected to fail |
| } |
| } |
| |
| @Test |
| public void testBuildWithEmptySets() throws Exception { |
| CFGBuilder builder = CFGBuilder.createCFG(). |
| withNonTerminals(Collections.<String>emptyList()). |
| withTerminals(Collections.<String>emptyList()). |
| withRules(Collections.<Rule>emptyList()). |
| withStartSymbol(""); |
| try { |
| assertNotNull(builder.build()); |
| fail("cannot build a grammar whose start symbol doesn't belong to the non terminals symbols set"); |
| } catch (AssertionError e) { |
| // expected to fail |
| } |
| } |
| |
| @Test |
| public void testBuildWithMinimalGrammarSettings() throws Exception { |
| CFGBuilder builder = CFGBuilder.createCFG(). |
| withNonTerminals(Arrays.asList("")). |
| withTerminals(Collections.<String>emptyList()). |
| withRules(Collections.<Rule>emptyList()). |
| withStartSymbol(""); |
| assertNotNull(builder.build()); |
| } |
| |
| @Test |
| public void testBuildWithMinimalGrammarSettingsAndRandomExpansion() throws Exception { |
| CFGBuilder builder = CFGBuilder.createCFG(). |
| withNonTerminals(Arrays.asList("")). |
| withTerminals(Collections.<String>emptyList()). |
| withRules(Collections.<Rule>emptyList()). |
| withRandomExpansion(true). |
| withStartSymbol(""); |
| assertNotNull(builder.build()); |
| } |
| } |