What does assert(0) mean?

The C++ standard defers the definition of assert to the C standard. C99 §7.2/2: ” The assert macro puts diagnostic tests into programs; it expands to a void expression. When it is executed, if expression (which shall have a scalar type) is false (that is, compares equal to 0), the assert macro writes information about …

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Node.js assert.throws with async functions (Promises)

node 10 and newer Since Node.js v10.0, there is assert.rejects which does just that. Older versions of node async functions never throw – they return promises that might be rejected. You cannot use assert.throws with them. You need to write your own asynchronous assertion: async function assertThrowsAsynchronously(test, error) { try { await test(); } catch(e) …

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Why assertEquals and assertSame in junit return the same result for two instances same class?

Since you didn’t override equals in your class, assertEquals behaves the same as assertSame since the default equals implementation compare references. 150 public boolean equals(Object obj) { 151 return (this == obj); 152 } If you provide a dumb overriding of equals: class SomeClass { @Override public boolean equals(Object o) { return true; } } …

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What are the advantages or difference in “assert False” and “self.assertFalse”

If you run import unittest class Test_Unittest(unittest.TestCase): def test_assert(self): assert False def test_assertFalse(self): self.assertFalse(True) if __name__ == ‘__main__’: unittest.main() You get the same logging information, the same failure: FF ====================================================================== FAIL: test_assert (__main__.Test_Unittest) ———————————————————————- Traceback (most recent call last): File “/home/unutbu/pybin/test.py”, line 6, in test_assert assert False AssertionError ====================================================================== FAIL: test_assertFalse (__main__.Test_Unittest) ———————————————————————- Traceback (most …

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Assert keyword in Java

Assert will throw a runtime error (AssertionError) if its condition is false. Asserts give you a streamlined way of documenting, checking, and enforcing correctness criteria for your code. The benefits are a language-level hook for defining and manipulating these correctness conditions. To the extent that you wish to enable or disable them (there are arguments …

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How to check constructor arguments and throw an exception or make an assertion in a default constructor in Scala?

In Scala, the whole body of the class is your primary constructor, so you can add your validation logic there. scala> class Foo(val i: Int) { | if(i < 0) | throw new IllegalArgumentException(“the number must be non-negative.”) | } defined class Foo scala> new Foo(3) res106: Foo = Foo@3bfdb2 scala> new Foo(-3) java.lang.IllegalArgumentException: the …

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