| 1 | package spiffy.junit; |
| 2 | |
| 3 | import java.util.Collection; |
| 4 | |
| 5 | import junit.framework.Assert; |
| 6 | |
| 7 | /** |
| 8 | * This class provides essential assertions missing from JUnit in order to create clear JUnit test cases. |
| 9 | * |
| 10 | * @author Kasper B. Graversen |
| 11 | */ |
| 12 | public class AssertHelper extends Assert { |
| 13 | |
| 14 | /** |
| 15 | * Check if a collection is empty |
| 16 | * |
| 17 | * @param collection |
| 18 | */ |
| 19 | public static <T> void assertEmpty(final String message, final Collection<T> collection) { |
| 20 | if( collection == null ) { |
| 21 | fail(message + "[collection is null]"); |
| 22 | } |
| 23 | if( collection.size() != 0 ) { |
| 24 | fail("Collection " + collection + " is not empty!"); |
| 25 | } |
| 26 | } |
| 27 | |
| 28 | /** |
| 29 | * Check if two arrays element for element are equal. If not an AssertionFailedError is thrown. When both argument |
| 30 | * arrays are <tt>null</tt>, the method silently returns. |
| 31 | */ |
| 32 | public static void assertEquals(final String message, final byte[] expected, final byte[] actual) { |
| 33 | if( expected == null && actual == null ) { return; } |
| 34 | if( expected == null || actual == null ) { |
| 35 | fail(message + " [Expected: " + expected + ", actual " + actual + ']'); |
| 36 | } |
| 37 | assertEquals(message + " [Length]", expected.length, actual.length); |
| 38 | for( int i = 0; i < expected.length; i++ ) { |
| 39 | assertEquals(message + " [" + i + ']', expected[i], actual[i]); |
| 40 | } |
| 41 | } |
| 42 | |
| 43 | /** |
| 44 | * Check if two arrays element for element are equal. If not an AssertionFailedError is thrown. When both argument |
| 45 | * arrays are <tt>null</tt>, the method silently returns. |
| 46 | */ |
| 47 | public static void assertEquals(final String message, final int[] expected, final int[] actual) { |
| 48 | if( expected == null && actual == null ) { return; } |
| 49 | if( expected == null || actual == null ) { |
| 50 | fail(message + " [Expected: " + expected + ", actual " + actual + ']'); |
| 51 | } |
| 52 | assertEquals(message + " [Length]", expected.length, actual.length); |
| 53 | for( int i = 0; i < expected.length; i++ ) { |
| 54 | assertEquals(message + " [" + i + ']', expected[i], actual[i]); |
| 55 | } |
| 56 | } |
| 57 | |
| 58 | /** |
| 59 | * Check if two arrays element for element are equal. If not an AssertionFailedError is thrown. When both argument |
| 60 | * arrays are <tt>null</tt>, the method silently returns. |
| 61 | */ |
| 62 | public static void assertEquals(final String message, final Object[] expected, final Object[] actual) { |
| 63 | if( expected == null && actual == null ) { return; } |
| 64 | if( expected == null || actual == null ) { |
| 65 | fail(message + " [Expected: " + expected + ", actual " + actual + ']'); |
| 66 | } |
| 67 | assertEquals(message + " [Length]", expected.length, actual.length); |
| 68 | for( int i = 0; i < expected.length; i++ ) { |
| 69 | assertEquals(message + " [" + i + ']', expected[i], actual[i]); |
| 70 | } |
| 71 | } |
| 72 | |
| 73 | /** |
| 74 | * check that the actual value is greater than the expected |
| 75 | */ |
| 76 | public static void assertGreaterThan(final String message, final double expectedGreaterThan, final double actual) { |
| 77 | if( expectedGreaterThan >= actual ) { |
| 78 | fail(message + ". Actual not greater than expected, " + expectedGreaterThan + " >= " + actual); |
| 79 | } |
| 80 | } |
| 81 | |
| 82 | /** |
| 83 | * check that the actual value is greater than the expected |
| 84 | */ |
| 85 | public static void assertGreaterThan(final String message, final int expectedGreaterThan, final int actual) { |
| 86 | if( expectedGreaterThan >= actual ) { |
| 87 | fail(message + ". Actual not greater than expected, " + expectedGreaterThan + " >= " + actual); |
| 88 | } |
| 89 | } |
| 90 | |
| 91 | public static void assertNotEquals(final int expected, final int actual) { |
| 92 | if( expected == actual ) { |
| 93 | fail("The two values are equal! Expected: " + expected + " actual: " + actual); |
| 94 | } |
| 95 | } |
| 96 | |
| 97 | /** |
| 98 | * check that the actual value is not the expected |
| 99 | */ |
| 100 | public static void assertNotEquals(final String message, final double expected, final double actual) { |
| 101 | if( expected == actual ) { |
| 102 | fail(message + ". The two values are equal! Expected: " + expected + " actual: " + actual); |
| 103 | } |
| 104 | } |
| 105 | |
| 106 | /** |
| 107 | * check that the actual value is not the expected |
| 108 | */ |
| 109 | public static void assertNotEquals(final String message, final int expected, final int actual) { |
| 110 | if( expected == actual ) { |
| 111 | fail(message + ". The two values are equal! Expected: " + expected + " actual: " + actual); |
| 112 | } |
| 113 | } |
| 114 | |
| 115 | } |