| 1 |
package dk.thoerup.circuitbreaker;
|
| 2 |
|
| 3 |
|
| 4 |
import static org.junit.Assert.assertEquals;
|
| 5 |
import static org.junit.Assert.assertTrue;
|
| 6 |
|
| 7 |
import java.io.IOException;
|
| 8 |
|
| 9 |
import org.junit.Before;
|
| 10 |
import org.junit.Test;
|
| 11 |
|
| 12 |
import dk.thoerup.circuitbreaker.CircuitBreaker;
|
| 13 |
import dk.thoerup.circuitbreaker.CircuitBreakerException;
|
| 14 |
import dk.thoerup.circuitbreaker.config.StaticConfig;
|
| 15 |
|
| 16 |
|
| 17 |
|
| 18 |
|
| 19 |
public class TestCircuitBreaker {
|
| 20 |
public static final int DELAY = 50;
|
| 21 |
public static final int THRESHOLD = 2;
|
| 22 |
|
| 23 |
|
| 24 |
CircuitBreaker<String> cb;
|
| 25 |
|
| 26 |
@Before public void setup() {
|
| 27 |
cb = new CircuitBreaker<>("test", new StaticConfig(THRESHOLD, DELAY) );
|
| 28 |
}
|
| 29 |
|
| 30 |
@Test public void defaultState() {
|
| 31 |
assertTrue(cb.isClosed());
|
| 32 |
assertTrue(cb.getFailureCount() == 0);
|
| 33 |
}
|
| 34 |
|
| 35 |
@Test public void simpleTest() throws Exception {
|
| 36 |
String retval = (String) cb.invoke( new SucceedingInvocation() );
|
| 37 |
assertEquals(retval, "OK");
|
| 38 |
assertTrue( cb.isClosed() );
|
| 39 |
assertTrue(cb.getFailureCount() == 0);
|
| 40 |
}
|
| 41 |
|
| 42 |
@Test(expected=IOException.class) public void simpleFailingTest() throws Exception {
|
| 43 |
cb.invoke( new FailingInvocation() );
|
| 44 |
}
|
| 45 |
|
| 46 |
@Test public void failingTest() {
|
| 47 |
try {
|
| 48 |
cb.invoke( new FailingInvocation() );
|
| 49 |
}catch (Exception e) {}
|
| 50 |
assertTrue(cb.getFailureCount() == 1);
|
| 51 |
assertTrue(cb.isClosed());
|
| 52 |
}
|
| 53 |
|
| 54 |
@Test public void failAndResetTest() throws Exception {
|
| 55 |
try {
|
| 56 |
cb.invoke( new FailingInvocation() );
|
| 57 |
}catch (Exception e) {}
|
| 58 |
|
| 59 |
cb.invoke(new SucceedingInvocation() ); //after one good it should reset back to closed
|
| 60 |
|
| 61 |
assertTrue(cb.isClosed());
|
| 62 |
assertTrue(cb.getFailureCount() == 0);
|
| 63 |
}
|
| 64 |
|
| 65 |
@Test public void normalOpenTest() throws Exception {
|
| 66 |
try{
|
| 67 |
cb.invoke( new FailingInvocation() );
|
| 68 |
} catch (IOException e) {}
|
| 69 |
|
| 70 |
try{
|
| 71 |
cb.invoke( new FailingInvocation() );
|
| 72 |
} catch (IOException e) {}
|
| 73 |
|
| 74 |
assertTrue( cb.isOpen() );
|
| 75 |
}
|
| 76 |
|
| 77 |
@Test public void forcedTrip() {
|
| 78 |
assertTrue( cb.isClosed() );
|
| 79 |
cb.tripBreaker();
|
| 80 |
assertTrue( cb.isOpen() );
|
| 81 |
}
|
| 82 |
|
| 83 |
@Test public void forcedResetTest() throws Exception {
|
| 84 |
try{
|
| 85 |
cb.invoke( new FailingInvocation() );
|
| 86 |
} catch (IOException e) {}
|
| 87 |
|
| 88 |
try{
|
| 89 |
cb.invoke( new FailingInvocation() );
|
| 90 |
} catch (IOException e) {}
|
| 91 |
|
| 92 |
cb.reset();
|
| 93 |
|
| 94 |
assertTrue( cb.isClosed() );
|
| 95 |
assertTrue( cb.getFailureCount() == 0 );
|
| 96 |
}
|
| 97 |
|
| 98 |
|
| 99 |
@Test(expected=CircuitBreakerException.class) public void openAndFailingTest1() throws Exception {
|
| 100 |
cb.tripBreaker();
|
| 101 |
assertTrue(cb.isOpen());
|
| 102 |
cb.invoke( new FailingInvocation() );
|
| 103 |
}
|
| 104 |
|
| 105 |
@Test(expected=CircuitBreakerException.class) public void openAndFailingTest2() throws Exception {
|
| 106 |
cb.tripBreaker();
|
| 107 |
assertTrue(cb.isOpen());
|
| 108 |
cb.invoke( new SucceedingInvocation() );
|
| 109 |
}
|
| 110 |
|
| 111 |
@Test public void halfOpen1() throws Exception {
|
| 112 |
cb.tripBreaker();
|
| 113 |
|
| 114 |
assertTrue( cb.isOpen() );
|
| 115 |
Thread.sleep(DELAY*2);
|
| 116 |
|
| 117 |
cb.invoke( new SucceedingInvocation() );
|
| 118 |
assertTrue( cb.isClosed() );
|
| 119 |
}
|
| 120 |
|
| 121 |
@Test(expected=CircuitBreakerException.class) public void halfOpen2() throws Exception {
|
| 122 |
cb.tripBreaker();
|
| 123 |
|
| 124 |
assertTrue( cb.isOpen() );
|
| 125 |
Thread.sleep(DELAY*2);
|
| 126 |
|
| 127 |
cb.invoke( new FailingInvocation() ); //in half-open this will cause a CircuitBreakerException, as if it was in open mode
|
| 128 |
}
|
| 129 |
|
| 130 |
@Test public void halfOpen3() throws Exception {
|
| 131 |
cb.tripBreaker();
|
| 132 |
|
| 133 |
assertTrue( cb.isOpen() );
|
| 134 |
Thread.sleep(DELAY*2);
|
| 135 |
|
| 136 |
try{
|
| 137 |
cb.invoke( new FailingInvocation() );
|
| 138 |
} catch (CircuitBreakerException e) {}
|
| 139 |
|
| 140 |
assertTrue( cb.isOpen() ); //after failing in half-open go back to open
|
| 141 |
}
|
| 142 |
|
| 143 |
|
| 144 |
}
|
Parent Directory
| 
Revision Log