| Classes in this File | Line Coverage | Branch Coverage | Complexity | ||||
| ComparisonTool |
|
| 5.333333333333333;5.333 |
| 1 | package org.apache.maven.surefire.assertion; | |
| 2 | ||
| 3 | /* | |
| 4 | * Licensed to the Apache Software Foundation (ASF) under one | |
| 5 | * or more contributor license agreements. See the NOTICE file | |
| 6 | * distributed with this work for additional information | |
| 7 | * regarding copyright ownership. The ASF licenses this file | |
| 8 | * to you under the Apache License, Version 2.0 (the | |
| 9 | * "License"); you may not use this file except in compliance | |
| 10 | * with the License. You may obtain a copy of the License at | |
| 11 | * | |
| 12 | * http://www.apache.org/licenses/LICENSE-2.0 | |
| 13 | * | |
| 14 | * Unless required by applicable law or agreed to in writing, | |
| 15 | * software distributed under the License is distributed on an | |
| 16 | * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY | |
| 17 | * KIND, either express or implied. See the License for the | |
| 18 | * specific language governing permissions and limitations | |
| 19 | * under the License. | |
| 20 | */ | |
| 21 | ||
| 22 | /** | |
| 23 | * Utilities for displaying comparison failures. | |
| 24 | */ | |
| 25 | public class ComparisonTool | |
| 26 | { | |
| 27 | private ComparisonTool() | |
| 28 | 0 | { |
| 29 | 0 | } |
| 30 | ||
| 31 | /** | |
| 32 | * Returns "..." in place of common prefix and "..." in | |
| 33 | * place of common suffix between expected and actual. | |
| 34 | * <p/> | |
| 35 | * Inspired by a patch from Alex Chaffee mailto:alex@purpletech.com | |
| 36 | * | |
| 37 | * @param message the message to go along with the comparison | |
| 38 | * @param expected the expected value | |
| 39 | * @param actual the actual value | |
| 40 | * @return the reduced comparison | |
| 41 | */ | |
| 42 | static String trimComparison( String message, String expected, String actual ) | |
| 43 | { | |
| 44 | String actualValue; | |
| 45 | String expectedValue; | |
| 46 | ||
| 47 | 0 | if ( expected == null && actual == null ) |
| 48 | { | |
| 49 | 0 | throw new IllegalArgumentException( "Cannot pass both expected and actual as null" ); |
| 50 | } | |
| 51 | 0 | else if ( expected == null || actual == null ) |
| 52 | { | |
| 53 | 0 | actualValue = actual; |
| 54 | 0 | expectedValue = expected; |
| 55 | } | |
| 56 | else | |
| 57 | { | |
| 58 | 0 | int end = Math.min( expected.length(), actual.length() ); |
| 59 | ||
| 60 | 0 | int i = 0; |
| 61 | 0 | for ( ; i < end; i++ ) |
| 62 | { | |
| 63 | 0 | if ( expected.charAt( i ) != actual.charAt( i ) ) |
| 64 | { | |
| 65 | 0 | break; |
| 66 | } | |
| 67 | } | |
| 68 | 0 | int j = expected.length() - 1; |
| 69 | 0 | int k = actual.length() - 1; |
| 70 | 0 | for ( ; k >= i && j >= i; k--, j-- ) |
| 71 | { | |
| 72 | 0 | if ( expected.charAt( j ) != actual.charAt( k ) ) |
| 73 | { | |
| 74 | 0 | break; |
| 75 | } | |
| 76 | } | |
| 77 | ||
| 78 | // equal strings | |
| 79 | 0 | if ( j < i && k < i ) |
| 80 | { | |
| 81 | 0 | throw new IllegalArgumentException( "expected and actual cannot be the same" ); |
| 82 | } | |
| 83 | else | |
| 84 | { | |
| 85 | 0 | expectedValue = expected.substring( i, j + 1 ); |
| 86 | 0 | actualValue = actual.substring( i, k + 1 ); |
| 87 | 0 | if ( i <= end && i > 0 ) |
| 88 | { | |
| 89 | 0 | expectedValue = "..." + expectedValue; |
| 90 | 0 | actualValue = "..." + actualValue; |
| 91 | } | |
| 92 | ||
| 93 | 0 | if ( j < expected.length() - 1 ) |
| 94 | { | |
| 95 | 0 | expectedValue = expectedValue + "..."; |
| 96 | } | |
| 97 | 0 | if ( k < actual.length() - 1 ) |
| 98 | { | |
| 99 | 0 | actualValue = actualValue + "..."; |
| 100 | } | |
| 101 | } | |
| 102 | } | |
| 103 | 0 | return formatMismatch( message, expectedValue, actualValue ); |
| 104 | } | |
| 105 | ||
| 106 | /** | |
| 107 | * Format a message for a comparison failure. | |
| 108 | * | |
| 109 | * @param message the message to go with the failure | |
| 110 | * @param expected the expected value | |
| 111 | * @param actual the actual value | |
| 112 | * @return the formatted string | |
| 113 | */ | |
| 114 | static String formatMismatch( String message, Object expected, Object actual ) | |
| 115 | { | |
| 116 | 0 | String formatted = ""; |
| 117 | ||
| 118 | 0 | if ( message != null ) |
| 119 | { | |
| 120 | 0 | formatted = message + " "; |
| 121 | } | |
| 122 | ||
| 123 | // TODO! i18n | |
| 124 | 0 | return formatted + "expected:<" + expected + "> but was:<" + actual + ">"; |
| 125 | } | |
| 126 | } |