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// 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 static com.google.common.truth.Truth.assertThat;
import static com.google.devtools.build.lib.testutil.MoreAsserts.assertThrows;
import static org.junit.Assert.fail;
import com.google.common.collect.ImmutableList;
import com.google.common.collect.ImmutableMap;
import com.google.devtools.build.lib.collect.nestedset.NestedSetBuilder;
import com.google.devtools.build.lib.packages.NativeProvider;
import com.google.devtools.build.lib.skylarkinterface.SkylarkModule;
import com.google.devtools.build.lib.skylarkinterface.SkylarkPrinter;
import com.google.devtools.build.lib.skylarkinterface.SkylarkValue;
import com.google.devtools.build.lib.syntax.EvalUtils.ComparisonException;
import com.google.devtools.build.lib.syntax.SkylarkList.MutableList;
import com.google.devtools.build.lib.syntax.SkylarkList.Tuple;
import com.google.devtools.build.lib.syntax.util.EvaluationTestCase;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.junit.runners.JUnit4;
/**
* Test properties of the evaluator's datatypes and utility functions
* without actually creating any parse trees.
*/
@RunWith(JUnit4.class)
public class EvalUtilsTest extends EvaluationTestCase {
private static MutableList<Object> makeList(Environment env) {
return MutableList.of(env, 1, 2, 3);
}
private static SkylarkDict<Object, Object> makeDict(Environment env) {
return SkylarkDict.of(env, 1, 1, 2, 2);
}
@Test
public void testEmptyStringToIterable() throws Exception {
assertThat(EvalUtils.toIterable("", null, null)).isEmpty();
}
@Test
public void testStringToIterable() throws Exception {
assertThat(EvalUtils.toIterable("abc", null, null)).hasSize(3);
}
@Test
public void testSize() throws Exception {
assertThat(EvalUtils.size("abc")).isEqualTo(3);
assertThat(EvalUtils.size(ImmutableMap.of(1, 2, 3, 4))).isEqualTo(2);
assertThat(EvalUtils.size(SkylarkList.Tuple.of(1, 2, 3))).isEqualTo(3);
SkylarkNestedSet set = SkylarkNestedSet.of(
Object.class,
NestedSetBuilder.stableOrder().add(1).add(2).add(3).build());
assertThat(EvalUtils.size(set)).isEqualTo(3);
assertThat(EvalUtils.size(ImmutableList.of(1, 2, 3))).isEqualTo(3);
}
/** MockClassA */
@SkylarkModule(name = "MockClassA", doc = "MockClassA")
public static class MockClassA {
}
/** MockClassB */
public static class MockClassB extends MockClassA {
}
@Test
public void testDataTypeNames() throws Exception {
assertThat(EvalUtils.getDataTypeName("foo")).isEqualTo("string");
assertThat(EvalUtils.getDataTypeName(3)).isEqualTo("int");
assertThat(EvalUtils.getDataTypeName(Tuple.of(1, 2, 3))).isEqualTo("tuple");
assertThat(EvalUtils.getDataTypeName(makeList(null))).isEqualTo("list");
assertThat(EvalUtils.getDataTypeName(makeDict(null))).isEqualTo("dict");
assertThat(EvalUtils.getDataTypeName(Runtime.NONE)).isEqualTo("NoneType");
assertThat(EvalUtils.getDataTypeName(new MockClassA())).isEqualTo("MockClassA");
assertThat(EvalUtils.getDataTypeName(new MockClassB())).isEqualTo("MockClassA");
}
@Test
public void testDatatypeMutabilityPrimitive() throws Exception {
assertThat(EvalUtils.isImmutable("foo")).isTrue();
assertThat(EvalUtils.isImmutable(3)).isTrue();
}
@Test
public void testDatatypeMutabilityShallow() throws Exception {
assertThat(EvalUtils.isImmutable(Tuple.of(1, 2, 3))).isTrue();
// Mutability depends on the environment.
assertThat(EvalUtils.isImmutable(makeList(null))).isTrue();
assertThat(EvalUtils.isImmutable(makeDict(null))).isTrue();
assertThat(EvalUtils.isImmutable(makeList(env))).isFalse();
assertThat(EvalUtils.isImmutable(makeDict(env))).isFalse();
}
@Test
public void testDatatypeMutabilityDeep() throws Exception {
assertThat(EvalUtils.isImmutable(Tuple.<Object>of(makeList(null)))).isTrue();
assertThat(EvalUtils.isImmutable(Tuple.<Object>of(makeList(env)))).isFalse();
}
@Test
public void testComparatorWithDifferentTypes() throws Exception {
Object[] objects = {
"1",
2,
true,
Runtime.NONE,
SkylarkList.Tuple.of(1, 2, 3),
SkylarkList.Tuple.of("1", "2", "3"),
SkylarkList.MutableList.of(env, 1, 2, 3),
SkylarkList.MutableList.of(env, "1", "2", "3"),
SkylarkDict.of(env, "key", 123),
SkylarkDict.of(env, 123, "value"),
NestedSetBuilder.stableOrder().add(1).add(2).add(3).build(),
NativeProvider.STRUCT.create(ImmutableMap.of("key", (Object) "value"), "no field %s"),
};
for (int i = 0; i < objects.length; ++i) {
for (int j = 0; j < objects.length; ++j) {
if (i != j) {
try {
EvalUtils.SKYLARK_COMPARATOR.compare(objects[i], objects[j]);
fail("Shouldn't have compared different types");
} catch (ComparisonException e) {
// expected
}
}
}
}
}
@Test
public void testComparatorWithNones() throws Exception {
try {
EvalUtils.SKYLARK_COMPARATOR.compare(Runtime.NONE, Runtime.NONE);
fail("Shouldn't have compared nones");
} catch (ComparisonException e) {
// expected
}
}
@SkylarkModule(
name = "ParentType",
doc = "A parent class annotated with @SkylarkModule."
)
private static class ParentClassWithSkylarkModule {}
private static class ChildClass extends ParentClassWithSkylarkModule {}
private static class SkylarkValueSubclass implements SkylarkValue {
@Override
public void repr(SkylarkPrinter printer) {
printer.append("SkylarkValueSubclass");
}
}
private static class NonSkylarkValueSubclass {}
@Test
public void testGetSkylarkType() {
assertThat(EvalUtils.getSkylarkType(ParentClassWithSkylarkModule.class))
.isEqualTo(ParentClassWithSkylarkModule.class);
assertThat(EvalUtils.getSkylarkType(ChildClass.class))
.isEqualTo(ParentClassWithSkylarkModule.class);
assertThat(EvalUtils.getSkylarkType(SkylarkValueSubclass.class))
.isEqualTo(SkylarkValueSubclass.class);
IllegalArgumentException expected =
assertThrows(
IllegalArgumentException.class,
() -> EvalUtils.getSkylarkType(NonSkylarkValueSubclass.class));
assertThat(expected).hasMessageThat().contains(
"class com.google.devtools.build.lib.syntax.EvalUtilsTest$NonSkylarkValueSubclass "
+ "is not allowed as a Skylark value");
}
}
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