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Code Issues Wiki Activity

Bug 505743: Allow intermittent tests to try multiple times

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Change-Id: Id925a2a3b10397a798035f8d03be34131c43ef00
This commit is contained in:
Jonah Graham 2017-04-18 11:06:12 +01:00 • committed by Gerrit Code Review @ Eclipse.org
parent a27309d507
commit 2e235b70e7
1 changed files with 77 additions and 38 deletions
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115
core/org.eclipse.cdt.core.tests/parser/org/eclipse/cdt/core/parser/tests/ast2/AST2Tests.java
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@ -137,6 +137,7 @@ import junit.framework.TestSuite;
*/
public class AST2Tests extends AST2TestBase {
private static final int NUM_TESTS = 3;
private static final int RETRY_INTERMITTENT_COUNT = 5;
public static TestSuite suite() {
return suite(AST2Tests.class);
@ -5810,13 +5811,15 @@ public class AST2Tests extends AST2TestBase {
final CharSequence[] input = getContents(3);
final String code = concatInput(input, new int[] { 1, AMOUNT / 10, 1 });
for (ParserLanguage lang : ParserLanguage.values()) {
long mem = memoryUsed();
IASTTranslationUnit tu = parse(code, lang, false, true, 0);
long diff = memoryUsed() - mem;
// Allow a copy of the buffer, plus less than 1.5 bytes per initializer.
final int expected = code.length() * 2 + AMOUNT + AMOUNT / 2;
assertTrue(String.valueOf(diff) + " expected < " + expected, diff < expected);
assertTrue(tu.isFrozen());
intermittentTest(() -> {
long mem = memoryUsed();
IASTTranslationUnit tu = parse(code, lang, false, true, 0);
long diff = memoryUsed() - mem;
// Allow a copy of the buffer, plus less than 1.5 bytes per initializer.
final int expected = code.length() * 2 + AMOUNT + AMOUNT / 2;
assertTrue(String.valueOf(diff) + " expected < " + expected, diff < expected);
assertTrue(tu.isFrozen());
});
}
}
@ -5836,13 +5839,16 @@ public class AST2Tests extends AST2TestBase {
final CharSequence[] input = getContents(3);
final String code = concatInput(input, new int[] { 1, AMOUNT / 10, 1 });
for (ParserLanguage lang : ParserLanguage.values()) {
long mem = memoryUsed();
IASTTranslationUnit tu = parse(code, lang, false, true, 0);
long diff = memoryUsed() - mem;
// Allow a copy of the buffer, plus less than 1.5 bytes per initializer.
final int expected = code.length() * 2 + AMOUNT + AMOUNT / 2;
assertTrue(String.valueOf(diff) + " expected < " + expected, diff < expected);
assertTrue(tu.isFrozen());
intermittentTest(() -> {
long mem = memoryUsed();
IASTTranslationUnit tu = parse(code, lang, false, true, 0);
long diff = memoryUsed() - mem;
// Allow a copy of the buffer, plus less than 1.5 bytes per
// initializer.
final int expected = code.length() * 2 + AMOUNT + AMOUNT / 2;
assertTrue(String.valueOf(diff) + " expected < " + expected, diff < expected);
assertTrue(tu.isFrozen());
});
}
}
@ -5859,31 +5865,33 @@ public class AST2Tests extends AST2TestBase {
final CharSequence[] input = getContents(3);
final String code = concatInput(input, new int[] { 1, AMOUNT / 10, 1 });
for (ParserLanguage lang : ParserLanguage.values()) {
long mem = memoryUsed();
IASTTranslationUnit tu = parse(code, lang, false, true, maximumTrivialExpressionsInInitializer);
long diff = memoryUsed() - mem;
final int initializerSize = maximumTrivialExpressionsInInitializer * additionalBytesPerInitializer;
// Allow a copy of the buffer, plus less than 1.5 bytes per initializer.
final int expected = code.length() * 2 + AMOUNT + AMOUNT / 2 + initializerSize;
assertTrue(String.valueOf(diff) + " expected < " + expected, diff < expected);
assertTrue(tu.isFrozen());
tu.accept(new ASTVisitor() {
{
shouldVisitInitializers = true;
}
@Override
public int visit(IASTInitializer initializer) {
if (initializer instanceof IASTEqualsInitializer) {
IASTEqualsInitializer equalsInitializer = (IASTEqualsInitializer) initializer;
IASTInitializerClause initClause = equalsInitializer.getInitializerClause();
if (initClause instanceof IASTInitializerList) {
IASTInitializerList initList = (IASTInitializerList) initClause;
assertEquals(maximumTrivialExpressionsInInitializer, initList.getClauses().length);
}
intermittentTest(() -> {
long mem = memoryUsed();
IASTTranslationUnit tu = parse(code, lang, false, true, maximumTrivialExpressionsInInitializer);
long diff = memoryUsed() - mem;
final int initializerSize = maximumTrivialExpressionsInInitializer * additionalBytesPerInitializer;
// Allow a copy of the buffer, plus less than 1.5 bytes per initializer.
final int expected = code.length() * 2 + AMOUNT + AMOUNT / 2 + initializerSize;
assertTrue(String.valueOf(diff) + " expected < " + expected, diff < expected);
assertTrue(tu.isFrozen());
tu.accept(new ASTVisitor() {
{
shouldVisitInitializers = true;
}
return ASTVisitor.PROCESS_CONTINUE;
}
@Override
public int visit(IASTInitializer initializer) {
if (initializer instanceof IASTEqualsInitializer) {
IASTEqualsInitializer equalsInitializer = (IASTEqualsInitializer) initializer;
IASTInitializerClause initClause = equalsInitializer.getInitializerClause();
if (initClause instanceof IASTInitializerList) {
IASTInitializerList initList = (IASTInitializerList) initClause;
assertEquals(maximumTrivialExpressionsInInitializer, initList.getClauses().length);
}
}
return ASTVisitor.PROCESS_CONTINUE;
}
});
});
}
}
@ -5900,6 +5908,37 @@ public class AST2Tests extends AST2TestBase {
return result.toString();
}
public interface RunnableWithException {
public abstract void run() throws Exception;
}
/**
* As the tests using memoryUsed depend on estimating memory used, they can
* be somewhat intermittent if another thread comes along and makes some
* allocations at the wrong time. Therefore allow test to run multiple times
* to ensure memory usage is as expected. See Bug 505743.
*/
private void intermittentTest(RunnableWithException test) throws Exception {
Exception lastException = null;
for (int i = 0; i < RETRY_INTERMITTENT_COUNT ; i++) {
try {
test.run();
// no exception, success
return;
} catch (Exception | AssertionError e) {
lastException = new Exception("Attempted intermittent test " + RETRY_INTERMITTENT_COUNT
+ " times and it failed each time. Nested exception is last exception."
+ "Previous exceptions are on stderr", e);
System.err.println("IntermittentTest failed, exception was:");
e.printStackTrace();
}
}
throw lastException;
}
/**
* Use {@link #intermittentTest(RunnableWithException)} when testing against memory used.
*/
private long memoryUsed() throws InterruptedException {
final Runtime runtime = Runtime.getRuntime();
long mem= runtime.totalMemory()-runtime.freeMemory();