Line data    Source code

       1             : // Copyright (C) 2019 The Android Open Source Project
       2             : //
       3             : // Licensed under the Apache License, Version 2.0 (the "License");
       4             : // you may not use this file except in compliance with the License.
       5             : // You may obtain a copy of the License at
       6             : //
       7             : // http://www.apache.org/licenses/LICENSE-2.0
       8             : //
       9             : // Unless required by applicable law or agreed to in writing, software
      10             : // distributed under the License is distributed on an "AS IS" BASIS,
      11             : // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
      12             : // See the License for the specific language governing permissions and
      13             : // limitations under the License.
      14             : 
      15             : package com.google.gerrit.index.query.testing;
      16             : 
      17             : import static com.google.common.base.Preconditions.checkArgument;
      18             : import static com.google.common.truth.Truth.assertAbout;
      19             : import static java.util.Objects.requireNonNull;
      20             : 
      21             : import com.google.common.truth.FailureMetadata;
      22             : import com.google.common.truth.Subject;
      23             : import com.google.gerrit.index.query.QueryParser;
      24             : import org.antlr.runtime.tree.Tree;
      25             : 
      26             : public class TreeSubject extends Subject {
      27             :   public static TreeSubject assertThat(Tree actual) {
      28           1 :     return assertAbout(TreeSubject::new).that(actual);
      29             :   }
      30             : 
      31             :   private final Tree tree;
      32             : 
      33             :   private TreeSubject(FailureMetadata failureMetadata, Tree tree) {
      34           1 :     super(failureMetadata, tree);
      35           1 :     this.tree = tree;
      36           1 :   }
      37             : 
      38             :   public void hasType(int expectedType) {
      39           1 :     isNotNull();
      40           1 :     check("getType()").that(typeName(tree.getType())).isEqualTo(typeName(expectedType));
      41           1 :   }
      42             : 
      43             :   public void hasText(String expectedText) {
      44           1 :     requireNonNull(expectedText);
      45           1 :     isNotNull();
      46           1 :     check("getText()").that(tree.getText()).isEqualTo(expectedText);
      47           1 :   }
      48             : 
      49             :   public void hasNoChildren() {
      50           1 :     isNotNull();
      51           1 :     check("getChildCount()").that(tree.getChildCount()).isEqualTo(0);
      52           1 :   }
      53             : 
      54             :   public void hasChildCount(int expectedChildCount) {
      55           1 :     checkArgument(
      56             :         expectedChildCount > 0, "expected child count must be positive: %s", expectedChildCount);
      57           1 :     isNotNull();
      58           1 :     check("getChildCount()").that(tree.getChildCount()).isEqualTo(expectedChildCount);
      59           1 :   }
      60             : 
      61             :   public TreeSubject child(int childIndex) {
      62           1 :     isNotNull();
      63           1 :     return check("getChild(%s)", childIndex)
      64           1 :         .about(TreeSubject::new)
      65           1 :         .that(tree.getChild(childIndex));
      66             :   }
      67             : 
      68             :   private static String typeName(int type) {
      69           1 :     checkArgument(
      70             :         type >= 0 && type < QueryParser.tokenNames.length,
      71             :         "invalid token type %s, max is %s",
      72             :         type,
      73             :         QueryParser.tokenNames.length - 1);
      74           1 :     return QueryParser.tokenNames[type];
      75             :   }
      76             : }