1 /* 2 * Copyright (C) 2018 The Dagger Authors. 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 package dagger.internal.codegen; 18 19 import static java.util.Arrays.stream; 20 import static java.util.stream.Collectors.joining; 21 22 import com.google.common.base.Joiner; 23 import java.util.regex.Pattern; 24 25 /** Utility methods useful for codegen tests. */ 26 final class TestUtils { 27 28 private static final Joiner MESSAGE_JOINER = Joiner.on("\n "); 29 30 /** 31 * Returns the lines joined by {@code "\n "}. Useful for passing to {@link 32 * com.google.testing.compile.CompilationSubject#hadErrorContaining(String)}, etc. 33 */ message(String... lines)34 static String message(String... lines) { 35 return MESSAGE_JOINER.join(lines); 36 } 37 38 /** 39 * Returns a pattern that matches strings that end with the lines joined by {@code "\n\s*"}. 40 * Useful for passing to {@link 41 * com.google.testing.compile.CompilationSubject#hadErrorContainingMatch(Pattern)}, etc. 42 */ endsWithMessage(String... lines)43 static Pattern endsWithMessage(String... lines) { 44 return Pattern.compile( 45 String.format("%s$", stream(lines).map(Pattern::quote).collect(joining("\n\\s*")))); 46 } 47 } 48