org.creekservice.internal.system.test.parser.YamlTestPackageParser Maven / Gradle / Ivy
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/*
* Copyright 2022 Creek Contributors (https://github.com/creek-service)
*
* 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 org.creekservice.internal.system.test.parser;
import static java.lang.System.lineSeparator;
import static java.util.Objects.requireNonNull;
import static org.creekservice.api.system.test.model.TestPackage.testPackage;
import com.fasterxml.jackson.databind.ObjectMapper;
import edu.umd.cs.findbugs.annotations.SuppressFBWarnings;
import java.io.IOException;
import java.nio.file.FileSystems;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.PathMatcher;
import java.nio.file.Paths;
import java.util.Collection;
import java.util.List;
import java.util.Map;
import java.util.Optional;
import java.util.function.Function;
import java.util.function.Predicate;
import java.util.function.Supplier;
import java.util.stream.Collectors;
import java.util.stream.Stream;
import org.creekservice.api.base.type.Suppliers;
import org.creekservice.api.system.test.extension.test.model.Expectation;
import org.creekservice.api.system.test.extension.test.model.Input;
import org.creekservice.api.system.test.extension.test.model.Ref;
import org.creekservice.api.system.test.model.TestCase;
import org.creekservice.api.system.test.model.TestCaseDef;
import org.creekservice.api.system.test.model.TestPackage;
import org.creekservice.api.system.test.model.TestSuite;
import org.creekservice.api.system.test.model.TestSuiteDef;
import org.creekservice.api.system.test.parser.ModelType;
import org.creekservice.api.system.test.parser.TestPackageParser;
/**
* Parse test suites from a directory structure of Yaml files.
*
* Expected directory structure:
*
*
* root
* |--seed
* |--inputs
* |--expectations
*
*
* ...with test suites defined in the root directory.
*/
public final class YamlTestPackageParser implements TestPackageParser {
private static final PathMatcher YAML_MATCHER =
FileSystems.getDefault().getPathMatcher("regex:.*\\.yml|.*\\.yaml");
private static final Path SEED = Paths.get("seed");
private static final Path INPUTS = Paths.get("inputs");
private static final Path EXPECTATIONS = Paths.get("expectations");
private final ObjectMapper mapper;
private final Observer observer;
/**
* @param modelExtensions known model extensions
* @param observer a parsing observer
*/
public YamlTestPackageParser(
final Collection> modelExtensions, final Observer observer) {
this.mapper = SystemTestMapper.create(modelExtensions);
this.observer = requireNonNull(observer, "observer");
}
@Override
public Optional parse(final Path path, final Predicate predicate) {
if (!Files.isDirectory(path.resolve(EXPECTATIONS))) {
// Test cases must have at least one expectation.
// Therefore, no expectation dir means no test suites:
return Optional.empty();
}
final List seedData =
loadDir(path.resolve(SEED), Input.class)
.map(LazyFile::content)
.collect(Collectors.toList());
final Map> inputs =
loadDir(path.resolve(INPUTS), Input.class)
.collect(Collectors.toMap(LazyFile::id, Function.identity()));
final Map> expectations =
loadDir(path.resolve(EXPECTATIONS), Expectation.class)
.collect(Collectors.toMap(LazyFile::id, Function.identity()));
final List suites =
loadDir(path, TestSuiteDef.class)
.filter(f -> predicate.test(f.path()))
.map(f -> testSuiteBuilder(f.content(), inputs, expectations))
.collect(Collectors.toUnmodifiableList());
if (suites.isEmpty()) {
return Optional.empty();
}
warnOnUnusedDependencies(path, inputs, expectations);
return Optional.of(testPackage(seedData, suites));
}
private Stream> loadDir(final Path dir, final Class type) {
return ymlFilesInDir(dir).stream()
.map(path -> new LazyFile<>(id(path), path, () -> parse(path, type)));
}
@SuppressFBWarnings(
value = "RCN_REDUNDANT_NULLCHECK_WOULD_HAVE_BEEN_A_NPE",
justification = "false negative")
private List ymlFilesInDir(final Path dir) {
if (!Files.exists(dir)) {
return List.of();
}
try (Stream stream = Files.walk(dir, 1)) {
return stream.filter(Files::isRegularFile)
.filter(YAML_MATCHER::matches)
.collect(Collectors.toUnmodifiableList());
} catch (final IOException e) {
throw new TestLoadFailedException("Error accessing directory " + dir, e);
}
}
private T parse(final Path path, final Class type) {
try {
return mapper.readValue(path.toFile(), type);
} catch (final Exception e) {
throw new InvalidTestFileException(
"Failed to load "
+ type.getSimpleName()
+ " from "
+ path.toUri()
+ lineSeparator()
+ "Please check the file is valid."
+ lineSeparator()
+ e.getMessage(),
e);
}
}
private static TestSuite.Builder testSuiteBuilder(
final TestSuiteDef def,
final Map> inputs,
final Map> expectations) {
try {
final List testCases =
def.tests().stream()
.map(testCaseDef -> testCaseBuilder(testCaseDef, inputs, expectations))
.collect(Collectors.toList());
return TestSuite.testSuite(testCases, def);
} catch (final InvalidTestFileException | MissingDependencyException e) {
throw new InvalidTestFileException(
"Error in suite '" + def.name() + "':" + e.getMessage(), e);
}
}
private static TestCase.Builder testCaseBuilder(
final TestCaseDef def,
final Map> inputs,
final Map> expectations) {
try {
final List testInputs =
def.inputs().stream()
.map(i -> findDependency(i, inputs))
.collect(Collectors.toList());
final List testExpectations =
def.expectations().stream()
.map(e -> findDependency(e, expectations))
.collect(Collectors.toList());
return TestCase.testCase(testInputs, testExpectations, def);
} catch (final InvalidTestFileException | MissingDependencyException e) {
throw new InvalidTestFileException("'" + def.name() + "': " + e.getMessage(), e);
}
}
private void warnOnUnusedDependencies(
final Path path,
final Map> inputs,
final Map> expectations) {
final List unused =
Stream.concat(inputs.values().stream(), expectations.values().stream())
.filter(LazyFile::unused)
.map(LazyFile::path)
.map(Path::toAbsolutePath)
.collect(Collectors.toUnmodifiableList());
if (!unused.isEmpty()) {
observer.unusedDependencies(path, unused);
}
}
private static T findDependency(final Ref ref, final Map> known) {
final LazyFile dependency = known.get(ref.id());
if (dependency == null) {
throw new MissingDependencyException(ref);
}
return dependency.content();
}
@SuppressFBWarnings(
value = "NP_NULL_ON_SOME_PATH_FROM_RETURN_VALUE",
justification = "path always has at least one part and extension")
private static String id(final Path path) {
final String fileName = path.getFileName().toString();
return fileName.substring(0, fileName.lastIndexOf('.'));
}
private static final class LazyFile {
private final String id;
private final Path path;
private final Supplier content;
private boolean unused = true;
LazyFile(final String id, final Path path, final Supplier content) {
this.id = requireNonNull(id, "id");
this.path = requireNonNull(path, "path");
this.content = Suppliers.memoize(content);
}
String id() {
return id;
}
Path path() {
return path;
}
T content() {
unused = false;
return content.get();
}
boolean unused() {
return unused;
}
}
}