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 … Read more
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) … Read more
Use the fluent interface to create assertions: Assert.That(() => new ApplicationArguments(args), Throws.TypeOf<ArgumentException>() .With.Message.EqualTo(“Invalid ending parameter of the workbook. Please use .xlsx random random”));
python -O does the following currently: completely ignores asserts sets the special builtin name __debug__ to False (which by default is True) and when called as python -OO removes docstrings from the code I don’t know why everyone forgets to mention the __debug__ issue; perhaps it is because I’m the only one using it 🙂 … Read more
Your getScore() returns Double, not double. Therefore compiler is confused: Should it convert both arguments to Object, or if it should convert only the Double to double? double a = 2.0; Double b = 2.0; // assertEquals(a,b); // fails to compile // the compiler is confused whether to use assertEquals((Object) a,(Object) b); // OK // … Read more
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 … Read more
Using the Hamcrest CoreMatcher (included in JUnit 4.4 and later) and assertThat(): assertThat(myString, anyOf(is(“value1”), is(“value2”)));
These are different things. A debug assert is only executed when the code is compiled as debug and therefore will only check/assert under debug. The idea is to use this for “sanity checks” for code you are developing. Code contracts can be used in either debug or release. They assure that pre and post conditions … Read more
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 … Read more
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 … Read more