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import org.aspectj.testing.Tester;
public class AssertsCv {
public static void main(String[] args) {
// programmatic enablement does not work after class is initialized
AssertsCv.class.getClassLoader().setClassAssertionStatus("AssertTest", true);
warnGlobalAssertions();
AssertTest.main(args);
}
static void warnGlobalAssertions() {
boolean pass = true;
try { assert false; }
catch (AssertionError e) { pass = false; }
finally {
if (!pass) {
System.err.println("WARNING: assertions enabled in AssertsCv");
}
}
}
}
class AssertTest {
int x;
public static void main(String[] args) {
requireAssertions();
testExpressions();
testContexts();
}
static void testContexts() {
InnerTester.testExpressions();
(new AssertTest()).new InnerInstanceTester().testExpressions();
// static initialization
boolean pass = false;
try { String s = InnerStaticInitFailure.class.getName(); }
catch (AssertionError e) { pass = true; }
catch (ExceptionInInitializerError e) {
Throwable t = e.getException(); // use getCause() in 1.4
pass = (null != t) && (t instanceof AssertionError);
}
finally { Tester.check(pass, "no assertion in static initializer"); }
AssertTest enclosing = new AssertTest();
// field initialization of inner class
pass = false;
try { enclosing.new InnerFieldInitFailure(); }
catch (AssertionError e) { pass = true; }
finally { Tester.check(pass, "no assertion in field initializer"); }
// instance initialization of inner class
pass = false;
try { enclosing.new InnerInitFailure(); }
catch (AssertionError e) { pass = true; }
finally { Tester.check(pass, "no assertion in constructor"); }
// anonymous inner class - method
pass = false;
boolean doingRun = false;
try {
enclosing.x = 1;
final int i = enclosing.x;
Runnable r = new Runnable() {
public void run() {
assert i != 1;
}
};
doingRun = true;
r.run();
} catch (AssertionError e) { pass = true; }
finally {
Tester.check(doingRun, "premature assertion in anonymous inner");
Tester.check(pass, "no assertion in anonymous inner");
}
enclosing.x = 0;
if (false) { // disabled now as current javac/j2se bug XXX
// anonymous inner class - field initializer
pass = false;
try {
enclosing.x = 1;
Runnable r = new Runnable() {
int j = throwAssert();
public void run() { }
int throwAssert() { assert false; return -100; }
};
doingRun = true;
r.run();
}
catch (AssertionError e) { pass = true; }
finally {
Tester.check(!doingRun, "missed assertion in anonymous inner");
Tester.check(pass, "no assertion in anonymous inner");
}
enclosing.x = 0;
}
}
static void requireAssertions() {
boolean pass = false;
try { assert false; }
catch (AssertionError e) { pass = true; }
finally { Tester.check(pass, "assertions not enabled"); }
}
static void testExpressions() {
// ---------- tests of not throwing assertions
// first is any boolean expression
int x = 0;
assert x < 2;
assert // parser questions
x<2
;
assert (x<2);
assert x < 2 ? true : false ;
assert x < 2 ? true : false : false ;
assert x < 2 ? true : false : "bug if assert thrown" ;
// If the first expression evaluates to true,
// the second expression is not evaluated
assert x == 0 : MyError.throwError("bug if error thrown");
assert x < 2 ? true : false : MyError.throwError("bug if error thrown");
// ---------- tests of throwing assertions
// (if these fail, it may be Sun's bug...)
// touch expression2 type bases
try { assert x > 0 : 3; }
catch (AssertionError e) { check(e, "3"); }
try { assert x > 0 : 3f; }
catch (AssertionError e) { check(e, "3"); }
try { assert x > 0 : 3d; }
catch (AssertionError e) { check(e, "3"); }
try { assert x > 0 : 3l; }
catch (AssertionError e) { check(e, "3"); }
try { assert x > 0 : 'c'; }
catch (AssertionError e) { check(e, "c"); }
try { assert x > 0 : "String"; }
catch (AssertionError e) { check(e, "String"); }
try { assert x > 0 : new StringWrapper("String"); }
catch (AssertionError e) { check(e, "String"); }
try { assert x > 0 : result(true); }
catch (AssertionError e) { check(e, "true"); }
try { assert x > 0 : Boolean.FALSE ; }
catch (AssertionError e) { check(e, "false"); }
try { assert x > 0 : Boolean.FALSE ; }
catch (AssertionError e) { check(e, "false"); }
// If an exception is thrown while either expression is being evaluated,
// the assert statement completes abruptly, throwing this exception
try { assert MyError.throwError("throwit"); }
catch (MyError e) { check(e, "throwit"); }
catch (AssertionError e) { Tester.check(false, "expected throwit-1"); }
try { assert x > 0 : MyError.throwError("throwit"); }
catch (MyError e) { check(e, "throwit"); }
catch (AssertionError e) { Tester.check(false, "expected throwit-2"); }
try { assert MyInnerError.throwError("throwit"); }
catch (MyInnerError e) { check(e, "throwit"); }
catch (AssertionError e) { Tester.check(false, "expected throwit-1"); }
try { assert x > 0 : MyInnerError.throwError("throwit"); }
catch (MyInnerError e) { check(e, "throwit"); }
catch (AssertionError e) { Tester.check(false, "expected throwit-2"); }
}
static void check(Error e, String prefix) {
String m = e.getMessage();
Tester.check(m.startsWith(prefix),
"expected " + m
+ " to start with " + prefix);
}
static boolean result(boolean b ) {
return b;
}
private static class MyInnerError extends Error {
MyInnerError(String s) { super(s); }
static boolean throwError(String s) {
throw new MyInnerError(s);
}
}
private static class InnerTester {
// copy/paste from above
static void testExpressions() {
// ---------- tests of not throwing assertions
// first is any boolean expression
int x = 0;
assert x < 2;
assert // parser questions
x<2
;
assert (x<2);
assert x < 2 ? true : false ;
assert x < 2 ? true : false : false ;
assert x < 2 ? true : false : "bug if assert thrown" ;
// If the first expression evaluates to true,
// the second expression is not evaluated
assert x == 0 : MyError.throwError("bug if error thrown");
assert x < 2 ? true : false : MyError.throwError("bug if error thrown");
// ---------- tests of throwing assertions
// (if these fail, it may be Sun's bug...)
// touch expression2 type bases
try { assert x > 0 : 3; }
catch (AssertionError e) { check(e, "3"); }
try { assert x > 0 : 3f; }
catch (AssertionError e) { check(e, "3"); }
try { assert x > 0 : 3d; }
catch (AssertionError e) { check(e, "3"); }
try { assert x > 0 : 3l; }
catch (AssertionError e) { check(e, "3"); }
try { assert x > 0 : 'c'; }
catch (AssertionError e) { check(e, "c"); }
try { assert x > 0 : "String"; }
catch (AssertionError e) { check(e, "String"); }
try { assert x > 0 : new StringWrapper("String"); }
catch (AssertionError e) { check(e, "String"); }
try { assert x > 0 : result(true); }
catch (AssertionError e) { check(e, "true"); }
try { assert x > 0 : Boolean.FALSE ; }
catch (AssertionError e) { check(e, "false"); }
try { assert x > 0 : Boolean.FALSE ; }
catch (AssertionError e) { check(e, "false"); }
// If an exception is thrown while either expression is being evaluated,
// the assert statement completes abruptly, throwing this exception
try { assert MyError.throwError("throwit"); }
catch (MyError e) { check(e, "throwit"); }
catch (AssertionError e) { Tester.check(false, "expected throwit-1"); }
try { assert x > 0 : MyError.throwError("throwit"); }
catch (MyError e) { check(e, "throwit"); }
catch (AssertionError e) { Tester.check(false, "expected throwit-2"); }
try { assert MyInnerError.throwError("throwit"); }
catch (MyInnerError e) { check(e, "throwit"); }
catch (AssertionError e) { Tester.check(false, "expected throwit-1"); }
try { assert x > 0 : MyInnerError.throwError("throwit"); }
catch (MyInnerError e) { check(e, "throwit"); }
catch (AssertionError e) { Tester.check(false, "expected throwit-2"); }
}
}
private class InnerInstanceTester {
// copy/paste from above, with exception of x variable
void testExpressions() {
// ---------- tests of not throwing assertions
// first is any boolean expression
x = 0; // variable from enclosing instance
assert x < 2;
assert // parser questions
x<2
;
assert (x<2);
assert x < 2 ? true : false ;
assert x < 2 ? true : false : false ;
assert x < 2 ? true : false : "bug if assert thrown" ;
// If the first expression evaluates to true,
// the second expression is not evaluated
assert x == 0 : MyError.throwError("bug if error thrown");
assert x < 2 ? true : false : MyError.throwError("bug if error thrown");
// ---------- tests of throwing assertions
// (if these fail, it may be Sun's bug...)
// touch expression2 type bases
try { assert x > 0 : 3; }
catch (AssertionError e) { check(e, "3"); }
try { assert x > 0 : 3f; }
catch (AssertionError e) { check(e, "3"); }
try { assert x > 0 : 3d; }
catch (AssertionError e) { check(e, "3"); }
try { assert x > 0 : 3l; }
catch (AssertionError e) { check(e, "3"); }
try { assert x > 0 : 'c'; }
catch (AssertionError e) { check(e, "c"); }
try { assert x > 0 : "String"; }
catch (AssertionError e) { check(e, "String"); }
try { assert x > 0 : new StringWrapper("String"); }
catch (AssertionError e) { check(e, "String"); }
try { assert x > 0 : result(true); }
catch (AssertionError e) { check(e, "true"); }
try { assert x > 0 : Boolean.FALSE ; }
catch (AssertionError e) { check(e, "false"); }
try { assert x > 0 : Boolean.FALSE ; }
catch (AssertionError e) { check(e, "false"); }
// If an exception is thrown while either expression is being evaluated,
// the assert statement completes abruptly, throwing this exception
try { assert MyError.throwError("throwit"); }
catch (MyError e) { check(e, "throwit"); }
catch (AssertionError e) { Tester.check(false, "expected throwit-1"); }
try { assert x > 0 : MyError.throwError("throwit"); }
catch (MyError e) { check(e, "throwit"); }
catch (AssertionError e) { Tester.check(false, "expected throwit-2"); }
try { assert MyInnerError.throwError("throwit"); }
catch (MyInnerError e) { check(e, "throwit"); }
catch (AssertionError e) { Tester.check(false, "expected throwit-1"); }
try { assert x > 0 : MyInnerError.throwError("throwit"); }
catch (MyInnerError e) { check(e, "throwit"); }
catch (AssertionError e) { Tester.check(false, "expected throwit-2"); }
}
}
static class InnerStaticInitFailure {
static {
int x = 0;
assert x > 1 : "throwing assert during class init";
}
}
class InnerFieldInitFailure {
int i = getValue();
int getValue () {
int x = 0;
assert x > 1 : "throwing assert during field init";
return -100;
}
}
class InnerInitFailure {
InnerInitFailure() {
int x = 0;
assert x > 1 : "throwing assert during instance init";
}
}
}
class MyError extends Error {
MyError(String s) { super(s); }
static boolean throwError(String s) {
throw new MyError(s);
}
}
class StringWrapper {
private String string;
StringWrapper(String s) { string = s; }
public String toString() { return string; }
}
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