Brian O'Connor | f3d0616 | 2014-10-02 15:54:12 -0700 | [diff] [blame] | 1 | package org.onlab.onos.net.intent; |
| 2 | |
| 3 | import static org.junit.Assert.fail; |
| 4 | |
| 5 | /** |
| 6 | * Set of test tools. |
| 7 | */ |
| 8 | public final class TestTools { |
| 9 | |
| 10 | // Disallow construction |
| 11 | private TestTools() { |
| 12 | } |
| 13 | |
| 14 | /** |
| 15 | * Utility method to pause the current thread for the specified number of |
| 16 | * milliseconds. |
| 17 | * |
| 18 | * @param ms number of milliseconds to pause |
| 19 | */ |
| 20 | public static void delay(int ms) { |
| 21 | try { |
| 22 | Thread.sleep(ms); |
| 23 | } catch (InterruptedException e) { |
| 24 | fail("unexpected interrupt"); |
| 25 | } |
| 26 | } |
| 27 | |
| 28 | /** |
| 29 | * Periodically runs the given runnable, which should contain a series of |
| 30 | * test assertions until all the assertions succeed, in which case it will |
| 31 | * return, or until the the time expires, in which case it will throw the |
| 32 | * first failed assertion error. |
| 33 | * |
| 34 | * @param start start time, in millis since start of epoch from which the |
| 35 | * duration will be measured |
| 36 | * @param delay initial delay (in milliseconds) before the first assertion |
| 37 | * attempt |
| 38 | * @param step delay (in milliseconds) between successive assertion |
| 39 | * attempts |
| 40 | * @param duration number of milliseconds beyond the given start time, |
| 41 | * after which the failed assertions will be propagated and allowed |
| 42 | * to fail the test |
| 43 | * @param assertions runnable housing the test assertions |
| 44 | */ |
| 45 | public static void assertAfter(long start, int delay, int step, |
| 46 | int duration, Runnable assertions) { |
| 47 | delay(delay); |
| 48 | while (true) { |
| 49 | try { |
| 50 | assertions.run(); |
| 51 | break; |
| 52 | } catch (AssertionError e) { |
| 53 | if (System.currentTimeMillis() - start > duration) { |
| 54 | throw e; |
| 55 | } |
| 56 | } |
| 57 | delay(step); |
| 58 | } |
| 59 | } |
| 60 | |
| 61 | /** |
| 62 | * Periodically runs the given runnable, which should contain a series of |
| 63 | * test assertions until all the assertions succeed, in which case it will |
| 64 | * return, or until the the time expires, in which case it will throw the |
| 65 | * first failed assertion error. |
| 66 | * <p> |
| 67 | * The start of the period is the current time. |
| 68 | * |
| 69 | * @param delay initial delay (in milliseconds) before the first assertion |
| 70 | * attempt |
| 71 | * @param step delay (in milliseconds) between successive assertion |
| 72 | * attempts |
| 73 | * @param duration number of milliseconds beyond the current time time, |
| 74 | * after which the failed assertions will be propagated and allowed |
| 75 | * to fail the test |
| 76 | * @param assertions runnable housing the test assertions |
| 77 | */ |
| 78 | public static void assertAfter(int delay, int step, int duration, |
| 79 | Runnable assertions) { |
| 80 | assertAfter(System.currentTimeMillis(), delay, step, duration, |
| 81 | assertions); |
| 82 | } |
| 83 | |
| 84 | /** |
| 85 | * Periodically runs the given runnable, which should contain a series of |
| 86 | * test assertions until all the assertions succeed, in which case it will |
| 87 | * return, or until the the time expires, in which case it will throw the |
| 88 | * first failed assertion error. |
| 89 | * <p> |
| 90 | * The start of the period is the current time and the first assertion |
| 91 | * attempt is delayed by the value of {@code step} parameter. |
| 92 | * |
| 93 | * @param step delay (in milliseconds) between successive assertion |
| 94 | * attempts |
| 95 | * @param duration number of milliseconds beyond the current time time, |
| 96 | * after which the failed assertions will be propagated and allowed |
| 97 | * to fail the test |
| 98 | * @param assertions runnable housing the test assertions |
| 99 | */ |
| 100 | public static void assertAfter(int step, int duration, |
| 101 | Runnable assertions) { |
| 102 | assertAfter(step, step, duration, assertions); |
| 103 | } |
| 104 | |
| 105 | /** |
| 106 | * Periodically runs the given runnable, which should contain a series of |
| 107 | * test assertions until all the assertions succeed, in which case it will |
| 108 | * return, or until the the time expires, in which case it will throw the |
| 109 | * first failed assertion error. |
| 110 | * <p> |
| 111 | * The start of the period is the current time and each successive |
| 112 | * assertion attempt is delayed by at least 10 milliseconds unless the |
| 113 | * {@code duration} is less than that, in which case the one and only |
| 114 | * assertion is made after that delay. |
| 115 | * |
| 116 | * @param duration number of milliseconds beyond the current time, |
| 117 | * after which the failed assertions will be propagated and allowed |
| 118 | * to fail the test |
| 119 | * @param assertions runnable housing the test assertions |
| 120 | */ |
| 121 | public static void assertAfter(int duration, Runnable assertions) { |
| 122 | int step = Math.min(duration, Math.max(10, duration / 10)); |
| 123 | assertAfter(step, duration, assertions); |
| 124 | } |
| 125 | |
| 126 | } |