| // Copyright 2015 The Bazel Authors. All rights reserved. |
| // |
| // Licensed 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 com.google.devtools.build.lib.syntax; |
| |
| import static com.google.common.truth.Truth.assertThat; |
| |
| import java.util.ArrayList; |
| import java.util.List; |
| import org.junit.Test; |
| import org.junit.runner.RunWith; |
| import org.junit.runners.JUnit4; |
| |
| /** Tests for @{code NodeVisitor} */ |
| @RunWith(JUnit4.class) |
| public final class NodeVisitorTest { |
| |
| private static StarlarkFile parse(String... lines) throws SyntaxError { |
| ParserInput input = ParserInput.fromLines(lines); |
| StarlarkFile file = StarlarkFile.parse(input); |
| if (!file.ok()) { |
| throw new SyntaxError(file.errors()); |
| } |
| return file; |
| } |
| |
| @Test |
| public void everyIdentifierAndParameterIsVisitedInOrder() throws Exception { |
| final List<String> idents = new ArrayList<>(); |
| final List<String> params = new ArrayList<>(); |
| |
| class IdentVisitor extends NodeVisitor { |
| @Override |
| public void visit(Identifier node) { |
| idents.add(node.getName()); |
| } |
| |
| @Override |
| public void visit(Parameter node) { |
| params.add(node.toString()); |
| } |
| } |
| |
| StarlarkFile file = |
| parse( |
| "a = b", // |
| "def c(p1, p2=4, **p3):", |
| " for d in e: f(g)", |
| " return h + i.j()"); |
| IdentVisitor visitor = new IdentVisitor(); |
| file.accept(visitor); |
| assertThat(idents).containsExactly("b", "a", "c", "e", "d", "f", "g", "h", "i", "j").inOrder(); |
| assertThat(params).containsExactly("p1", "p2=4", "**p3").inOrder(); |
| } |
| } |