| // 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 com.google.devtools.build.lib.testutil.Scratch; |
| import com.google.devtools.build.lib.vfs.FileSystemUtils; |
| import com.google.devtools.build.lib.vfs.Path; |
| import java.io.IOException; |
| 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 SyntaxTreeVisitor} */ |
| @RunWith(JUnit4.class) |
| public class SyntaxTreeVisitorTest { |
| |
| private Scratch scratch = new Scratch(); |
| |
| /** Parses the contents of the specified string and returns the AST. */ |
| private BuildFileAST parse(String... lines) throws IOException { |
| Path file = scratch.file("/a/build/file/BUILD", lines); |
| byte[] bytes = FileSystemUtils.readWithKnownFileSize(file, file.getFileSize()); |
| return BuildFileAST.parseSkylarkFile( |
| bytes, file.getDigest(), file.asFragment(), /* reporter */ null); |
| } |
| |
| @Test |
| public void everyIdentifierAndParameterIsVisitedInOrder() throws IOException { |
| final List<String> idents = new ArrayList<>(); |
| final List<String> params = new ArrayList<>(); |
| |
| class IdentVisitor extends SyntaxTreeVisitor { |
| @Override |
| public void visit(Identifier node) { |
| idents.add(node.getName()); |
| } |
| |
| @Override |
| public void visit(Parameter<Expression, Expression> node) { |
| params.add(node.toString()); |
| } |
| } |
| |
| BuildFileAST ast = |
| parse( |
| "a = b", |
| "def c(p1, p2=4, **p3):", |
| " for d in e: f(g)", |
| " return h + i.j()"); |
| IdentVisitor visitor = new IdentVisitor(); |
| ast.accept(visitor); |
| assertThat(idents).containsExactly("b", "a", "c", "e", "d", "f", "g", "h", "i", "j").inOrder(); |
| assertThat(params).containsExactly("p1", "p2=4", "**p3").inOrder(); |
| } |
| } |