| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you 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.apache.tinkerpop.gremlin.language.corpus; |
| |
| import org.apache.commons.text.StringEscapeUtils; |
| import org.javatuples.Pair; |
| |
| import java.io.IOException; |
| import java.nio.charset.StandardCharsets; |
| import java.nio.file.Files; |
| import java.nio.file.Paths; |
| import java.util.ArrayList; |
| import java.util.Collection; |
| import java.util.Collections; |
| import java.util.HashMap; |
| import java.util.LinkedHashMap; |
| import java.util.List; |
| import java.util.Map; |
| import java.util.function.BiFunction; |
| import java.util.regex.Matcher; |
| import java.util.regex.Pattern; |
| import java.util.stream.Collectors; |
| |
| /** |
| * Reads the Gherkin feature files of {@code gremlin-test} and extracts Gremlin examples. |
| */ |
| public class FeatureReader { |
| |
| private static final Pattern generalParameterPattern = Pattern.compile("And using the parameter (.+) (defined as|of) (.*)"); |
| |
| /** |
| * Parses features to a {@code List} of Gremlin strings. |
| * |
| * @param featureDir The root directory where feature files can be found including subdirectories |
| */ |
| public static List<String> parseFlat(final String featureDir) throws IOException { |
| return parseFlat(featureDir, Collections.emptyList()); |
| } |
| |
| /** |
| * Parses features to a {@code List} of Gremlin strings. |
| * |
| * @param featureDir The root directory where feature files can be found including subdirectories |
| * @param parameterMatchers list of pattern/functions that will transform a parameter from its Gherkin form to |
| * another format triggering that new formatted string to be inserted into the Gremlin |
| * itself |
| */ |
| public static List<String> parseFlat(final String featureDir, final List<Pair<Pattern, BiFunction<String, String, String>>> parameterMatchers) throws IOException { |
| return parseGrouped(featureDir, parameterMatchers).values().stream().flatMap(Collection::stream).collect(Collectors.toList()); |
| } |
| |
| /** |
| * Parses features to a {@code Map} structure of the test name as the key with a {@code List} of Gremlin strings |
| * for the value. |
| * |
| * @param featureDir The root directory where feature files can be found including subdirectories |
| */ |
| public static Map<String, List<String>> parseGrouped(final String featureDir) throws IOException { |
| return parseGrouped(featureDir, Collections.emptyList()); |
| } |
| |
| /** |
| * Parses features to a {@code Map} structure of the test name as the key with a {@code List} of Gremlin strings |
| * for the value. |
| * |
| * @param featureDir The root directory where feature files can be found including subdirectories |
| * @param parameterMatchers list of pattern/functions that will transform a parameter from its Gherkin form to |
| * another format triggering that new formatted string to be inserted into the Gremlin |
| * itself |
| */ |
| public static Map<String, List<String>> parseGrouped(final String featureDir, |
| final List<Pair<Pattern, BiFunction<String, String, String>>> parameterMatchers) throws IOException { |
| final Map<String, List<String>> gremlins = new LinkedHashMap<>(); |
| Files.find(Paths.get(featureDir), |
| Integer.MAX_VALUE, |
| (filePath, fileAttr) -> fileAttr.isRegularFile() && filePath.toString().endsWith(".feature")). |
| sorted(). |
| forEach(f -> { |
| String currentGremlin = ""; |
| boolean openTriples = false; |
| boolean skipIgnored = false; |
| String scenarioName = ""; |
| Map<String,String> parameters = new HashMap<>(); |
| |
| try { |
| final List<String> lines = Files.readAllLines(f, StandardCharsets.UTF_8); |
| for (String line : lines) { |
| String cleanLine = line.trim(); |
| if (cleanLine.startsWith("Scenario:")) { |
| scenarioName = cleanLine.split(":")[1].trim(); |
| skipIgnored = false; |
| parameters.clear(); |
| } else if (!parameterMatchers.isEmpty() && cleanLine.startsWith("And using the parameter")) { |
| final Matcher m = generalParameterPattern.matcher(cleanLine); |
| if (m.matches()) { |
| parameters.put(m.group(1), matchAndTransform(m.group(1), StringEscapeUtils.unescapeJava(m.group(3)), parameterMatchers)); |
| } else { |
| throw new IllegalStateException(String.format("Could not read parameters at: %s", cleanLine)); |
| } |
| } else if (cleanLine.startsWith("Then nothing should happen because")) { |
| skipIgnored = true; |
| } else if (cleanLine.startsWith("And the graph should return")) { |
| gremlins.computeIfAbsent(scenarioName, k -> new ArrayList<>()).add(applyParametersToGremlin(StringEscapeUtils.unescapeJava(cleanLine.substring(cleanLine.indexOf("\"") + 1, cleanLine.lastIndexOf("\""))), parameters)); |
| } else if (cleanLine.startsWith("\"\"\"")) { |
| openTriples = !openTriples; |
| if (!skipIgnored && !openTriples) { |
| currentGremlin = applyParametersToGremlin(currentGremlin, parameters); |
| gremlins.computeIfAbsent(scenarioName, k -> new ArrayList<>()).add(currentGremlin); |
| currentGremlin = ""; |
| } |
| } else if (openTriples && !skipIgnored) { |
| currentGremlin += cleanLine; |
| } |
| } |
| } catch (IOException ioe) { |
| throw new RuntimeException(ioe); |
| } |
| }); |
| |
| return gremlins; |
| } |
| |
| private static String applyParametersToGremlin(String currentGremlin, Map<String, String> parameters) { |
| // sort from longest to shortest so that xx1 does not replace xx10 |
| final List<String> paramNames = new ArrayList<>(parameters.keySet()); |
| paramNames.sort((a,b) -> b.length() - a.length()); |
| for (String k : paramNames) { |
| currentGremlin = currentGremlin.replace(k, parameters.get(k)); |
| } |
| return currentGremlin; |
| } |
| |
| private static String matchAndTransform(final String k, final String v, |
| final List<Pair<Pattern, BiFunction<String, String, String>>> parameterMatchers) { |
| for (Pair<Pattern,BiFunction<String,String,String>> matcherConverter : parameterMatchers) { |
| final Pattern pattern = matcherConverter.getValue0(); |
| final Matcher matcher = pattern.matcher(v); |
| if (matcher.find()) { |
| final BiFunction<String,String,String> converter = matcherConverter.getValue1(); |
| // when there are no groups there is a direct match |
| return converter.apply(k, matcher.groupCount() == 0 ? "" : matcher.group(1)); |
| } |
| } |
| |
| // this should be a raw string if it didn't match anything - suppose it could be a syntax error in the |
| // test too, but i guess the test would fail so perhaps ok to just assume it's raw string value that |
| // didn't need a transform by default |
| return v; |
| } |
| } |