| // Copyright 2006 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 com.google.common.truth.Truth; |
| import com.google.devtools.build.lib.events.Event; |
| import java.util.Arrays; |
| import java.util.Set; |
| import java.util.stream.Collectors; |
| import org.junit.Test; |
| import org.junit.runner.RunWith; |
| import org.junit.runners.JUnit4; |
| |
| /** A test for {@link LValue#boundIdentifiers}()}. */ |
| @RunWith(JUnit4.class) |
| public class LValueBoundNamesTest { |
| |
| @Test |
| public void simpleAssignment() { |
| assertBoundNames("x = 1", "x"); |
| } |
| |
| @Test |
| public void listAssignment() { |
| assertBoundNames("x, y = 1", "x", "y"); |
| } |
| |
| @Test |
| public void complexListAssignment() { |
| assertBoundNames("x, [y] = 1", "x", "y"); |
| } |
| |
| @Test |
| public void arrayElementAssignment() { |
| assertBoundNames("x[1] = 1"); |
| } |
| |
| @Test |
| public void complexListAssignment2() { |
| assertBoundNames("[[x], y], [z, w[1]] = 1", "x", "y", "z"); |
| } |
| |
| private static void assertBoundNames(String assignment, String... expectedBoundNames) { |
| ParserInput input = ParserInput.fromLines(assignment); |
| StarlarkFile file = StarlarkFile.parse(input); |
| for (Event error : file.errors()) { |
| throw new AssertionError(error); |
| } |
| Expression lhs = ((AssignmentStatement) file.getStatements().get(0)).getLHS(); |
| Set<String> boundNames = |
| Identifier.boundIdentifiers(lhs).stream() |
| .map(Identifier::getName) |
| .collect(Collectors.toSet()); |
| Truth.assertThat(boundNames).containsExactlyElementsIn(Arrays.asList(expectedBoundNames)); |
| } |
| } |