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// Copyright 2014 Google Inc. 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 static org.junit.Assert.assertEquals;
import com.google.devtools.build.lib.concurrent.ThreadSafety.Immutable;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.junit.runners.JUnit4;
import java.util.Iterator;
/**
* Tests for SkylarkList.
*/
@RunWith(JUnit4.class)
public class SkylarkListTest extends EvaluationTestCase {
@Immutable
private static final class CustomIterable implements Iterable<Object> {
@Override
public Iterator<Object> iterator() {
// Throw an exception whenever we request the iterator, to test that lazy lists
// are truly lazy.
throw new IllegalArgumentException("Iterator requested");
}
}
private static final SkylarkList list =
SkylarkList.lazyList(new CustomIterable(), Integer.class);
@Override
public EvaluationContext newEvaluationContext() throws Exception {
return super.newEvaluationContext().update("lazy", list);
}
@Test
public void testLazyListIndex() throws Exception {
checkEvalError("Illegal argument in call to $index: Iterator requested", "a = lazy[0]");
}
@Test
public void testLazyListSize() throws Exception {
checkEvalError("Illegal argument in call to len: Iterator requested", "a = len(lazy)");
}
@Test
public void testLazyListEmpty() throws Exception {
checkEvalError("Iterator requested", "if lazy:\n a = 1");
}
@Test
public void testLazyListConcat() throws Exception {
eval("v = [1, 2] + lazy");
assertThat(lookup("v")).isInstanceOf(SkylarkList.class);
}
@Test
public void testConcatListIndex() throws Exception {
eval("l = [1, 2] + [3, 4]",
"e0 = l[0]",
"e1 = l[1]",
"e2 = l[2]",
"e3 = l[3]");
assertEquals(1, lookup("e0"));
assertEquals(2, lookup("e1"));
assertEquals(3, lookup("e2"));
assertEquals(4, lookup("e3"));
}
@Test
public void testConcatListHierarchicalIndex() throws Exception {
eval("l = [1] + (([2] + [3, 4]) + [5])",
"e0 = l[0]",
"e1 = l[1]",
"e2 = l[2]",
"e3 = l[3]",
"e4 = l[4]");
assertEquals(1, lookup("e0"));
assertEquals(2, lookup("e1"));
assertEquals(3, lookup("e2"));
assertEquals(4, lookup("e3"));
assertEquals(5, lookup("e4"));
}
@Test
public void testConcatListSize() throws Exception {
eval("l = [1, 2] + [3, 4]",
"s = len(l)");
assertEquals(4, lookup("s"));
}
@Test
public void testConcatListToString() throws Exception {
eval("l = [1, 2] + [3, 4]",
"s = str(l)");
assertEquals("[1, 2, 3, 4]", lookup("s"));
}
@Test
public void testConcatListNotEmpty() throws Exception {
eval("l = [1, 2] + [3, 4]",
"if l:",
" v = 1",
"else:",
" v = 0");
assertEquals(1, lookup("v"));
}
@Test
public void testConcatListEmpty() throws Exception {
eval("l = [] + []",
"if l:",
" v = 1",
"else:",
" v = 0");
assertEquals(0, lookup("v"));
}
@Test
public void testListComparison() throws Exception {
assertEquals(true, eval("(1, 'two', [3, 4]) == (1, 'two', [3, 4])"));
assertEquals(true, eval("[1, 2, 3, 4] == [1, 2] + [3, 4]"));
assertEquals(false, eval("[1, 2, 3, 4] == (1, 2, 3, 4)"));
assertEquals(false, eval("[1, 2] == [1, 2, 3]"));
assertEquals(true, eval("[] == []"));
assertEquals(true, eval("() == ()"));
assertEquals(false, eval("() == (1,)"));
assertEquals(false, eval("(1) == (1,)"));
}
}
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