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// 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.packages;
import static com.google.common.truth.Truth.assertThat;
import com.google.common.base.Preconditions;
import com.google.common.collect.ImmutableList;
import com.google.common.collect.ImmutableMap;
import com.google.devtools.build.lib.packages.ImplicitOutputsFunction.AttributeValueGetter;
import com.google.devtools.build.lib.testutil.Suite;
import com.google.devtools.build.lib.testutil.TestSpec;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collection;
import java.util.LinkedHashSet;
import java.util.List;
import java.util.Map;
import java.util.Set;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.junit.runners.JUnit4;
/**
* Tests for {@link ImplicitOutputsFunction}.
*/
@TestSpec(size = Suite.SMALL_TESTS)
@RunWith(JUnit4.class)
public final class ImplicitOutputsFunctionTest {
private void assertPlaceholderCollection(
String template, String expectedTemplate, String... expectedPlaceholders) throws Exception {
List<String> actualPlaceholders = new ArrayList<>();
assertThat(
ImplicitOutputsFunction.createPlaceholderSubstitutionFormatString(
template, actualPlaceholders))
.isEqualTo(expectedTemplate);
assertThat(actualPlaceholders)
.containsExactlyElementsIn(Arrays.asList(expectedPlaceholders))
.inOrder();
}
@Test
public void testNoPlaceholder() throws Exception {
assertPlaceholderCollection("foo", "foo");
}
@Test
public void testJustPlaceholder() throws Exception {
assertPlaceholderCollection("%{foo}", "%s", "foo");
}
@Test
public void testPrefixedPlaceholder() throws Exception {
assertPlaceholderCollection("foo%{bar}", "foo%s", "bar");
}
@Test
public void testSuffixedPlaceholder() throws Exception {
assertPlaceholderCollection("%{foo}bar", "%sbar", "foo");
}
@Test
public void testMultiplePlaceholdersPrefixed() throws Exception {
assertPlaceholderCollection("foo%{bar}baz%{qux}", "foo%sbaz%s", "bar", "qux");
}
@Test
public void testMultiplePlaceholdersSuffixed() throws Exception {
assertPlaceholderCollection("%{foo}bar%{baz}qux", "%sbar%squx", "foo", "baz");
}
@Test
public void testTightlyPackedPlaceholders() throws Exception {
assertPlaceholderCollection("%{foo}%{bar}%{baz}", "%s%s%s", "foo", "bar", "baz");
}
@Test
public void testIncompletePlaceholder() throws Exception {
assertPlaceholderCollection("%{foo", "%%{foo");
}
@Test
public void testCompleteAndIncompletePlaceholder() throws Exception {
assertPlaceholderCollection("%{foo}%{bar", "%s%%{bar", "foo");
}
@Test
public void testPlaceholderLooksLikeNestedIncompletePlaceholder() throws Exception {
assertPlaceholderCollection("%{%{foo", "%%{%%{foo");
}
@Test
public void testPlaceholderLooksLikeNestedPlaceholder() throws Exception {
assertPlaceholderCollection("%{%{foo}", "%s", "%{foo");
}
@Test
public void testEscapesJustPercentSign() throws Exception {
assertPlaceholderCollection("%", "%%");
}
@Test
public void testEscapesPrintfPlaceholder() throws Exception {
assertPlaceholderCollection("%{x}%s%{y}", "%s%%s%s", "x", "y");
}
@Test
public void testEscapesPercentSign() throws Exception {
assertPlaceholderCollection("foo%{bar}%baz", "foo%s%%baz", "bar");
}
private static AttributeValueGetter attrs(
final Map<String, ? extends Collection<String>> values) {
return new AttributeValueGetter() {
@Override
public Set<String> get(AttributeMap ignored, String attr) {
return new LinkedHashSet<>(Preconditions.checkNotNull(values.get(attr)));
}
};
}
private void assertPlaceholderSubtitution(
String template,
AttributeValueGetter attrValues,
String[] expectedSubstitutions,
String[] expectedFoundPlaceholders)
throws Exception {
// Directly call into ParsedTemplate in order to access the attribute names.
ImplicitOutputsFunction.ParsedTemplate parsedTemplate =
ImplicitOutputsFunction.ParsedTemplate.parse(template);
assertThat(parsedTemplate.attributeNames())
.containsExactlyElementsIn(Arrays.asList(expectedFoundPlaceholders))
.inOrder();
// Test the actual substitution code.
List<String> substitutions =
ImplicitOutputsFunction.substitutePlaceholderIntoTemplate(template, null, attrValues);
assertThat(substitutions)
.containsExactlyElementsIn(Arrays.asList(expectedSubstitutions));
}
@Test
public void testSingleScalarElementSubstitution() throws Exception {
assertPlaceholderSubtitution(
"%{x}",
attrs(ImmutableMap.of("x", ImmutableList.of("a"))),
new String[] {"a"},
new String[] {"x"});
}
@Test
public void testSingleVectorElementSubstitution() throws Exception {
assertPlaceholderSubtitution(
"%{x}",
attrs(ImmutableMap.of("x", ImmutableList.of("a", "b", "c"))),
new String[] {"a", "b", "c"},
new String[] {"x"});
}
@Test
public void testMultipleElementsSubstitution() throws Exception {
assertPlaceholderSubtitution(
"%{x}-%{y}-%{z}",
attrs(
ImmutableMap.of(
"x", ImmutableList.of("foo", "bar", "baz"),
"y", ImmutableList.of("meow"),
"z", ImmutableList.of("1", "2"))),
new String[] {
"foo-meow-1", "foo-meow-2", "bar-meow-1", "bar-meow-2", "baz-meow-1", "baz-meow-2"
},
new String[] {"x", "y", "z"});
}
@Test
public void testEmptyElementSubstitution() throws Exception {
assertPlaceholderSubtitution(
"a-%{x}",
attrs(ImmutableMap.of("x", ImmutableList.<String>of())),
new String[0],
new String[] {"x"});
}
@Test
public void testSamePlaceholderMultipleTimes() throws Exception {
assertPlaceholderSubtitution(
"%{x}-%{y}-%{x}",
attrs(ImmutableMap.of("x", ImmutableList.of("a", "b"), "y", ImmutableList.of("1", "2"))),
new String[] {"a-1-a", "a-1-b", "a-2-a", "a-2-b", "b-1-a", "b-1-b", "b-2-a", "b-2-b"},
new String[] {"x", "y", "x"});
}
@Test
public void testRepeatingPlaceholderValue() throws Exception {
assertPlaceholderSubtitution(
"%{x}",
attrs(ImmutableMap.of("x", ImmutableList.of("a", "a"))),
new String[] {"a"},
new String[] {"x"});
}
@Test
public void testIncompletePlaceholderTreatedAsText() throws Exception {
assertPlaceholderSubtitution(
"%{x}-%{y-%{z",
attrs(ImmutableMap.of("x", ImmutableList.of("a", "b"))),
new String[] {"a-%{y-%{z", "b-%{y-%{z"},
new String[] {"x"});
}
}
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