UnitTest¶

Basic Usage¶

Here is a minimal example demonstrating how to use the UnitTest module:

use UnitTest;

proc celsius2fahrenheit(x) {
  // we should be returning "(x: real * 9/5)+32"
  return (x * 9/5)+32;
}

proc test_temperature(test: borrowed Test) throws {
  // we were expecting 98.6 but since we missed typecasting
  // the above function returned 98.
  test.assertFalse(celsius2fahrenheit(37) == 98);
}

UnitTest.main();

Output:

======================================================================
FAIL xyz.chpl: test_temperature()
----------------------------------------------------------------------
AssertionError: assertFalse failed. Given expression is True

----------------------------------------------------------------------
Run 1 test

FAILED failures = 1

Skipping Tests¶

You can skip tests unconditionally with skip and conditionally with skipIf:

use UnitTest;

/* calculates factorial */
proc factorial(x: int): int {
  return if x == 0 then 1 else x * factorial(x-1);
}

/*Conditional skip*/
proc test1(test: borrowed Test) throws {
  test.skipIf(factorial(0) != 1,"Base condition is wrong in factorial");
  test.assertTrue(factorial(5) == 120);
}

/*Unconditional skip*/
proc test2(test: borrowed Test) throws {
  test.skip("Skipping the test directly");
}

UnitTest.main();

Output:

======================================================================
SKIPPED xyz.chpl: test2()
----------------------------------------------------------------------
TestSkipped: Skipping the test directly

----------------------------------------------------------------------
Run 1 test

OK skipped = 1

Specifying locales¶

You can specify the num of locales of a test using these method.

addNumLocales maxLocales minLocales

Here is an example demonstrating how to use the addNumLocales

proc test_square(test: borrowed Test) throws {
  test.addNumLocales(5);
  var A: [1..numLocales] int;
  coforall i in 0..numLocales-1 with (ref A) {
    on Locales(i) {
      A[i+1] = (i+1)*(i+1);
    }
  }
  test.assertTrue(A[5]==25);
}

Output:

----------------------------------------------------------------------
Run 1 test

OK

You can also specify multiple locales on which your code can run.

proc test3(test: borrowed Test) throws {
  test.addNumLocales(16,8);
}

You can mention the range of locales using maxLocales and minLocales

proc test4(test: borrowed Test) throws {
  test.maxLocales(4);
  test.minLocales(2);
}

Specifying Dependencies¶

dependsOn

Here is an example demonstrating how to use the dependsOn

use UnitTest;

var factArray: [1..0] int;

// calculates factorial
proc factorial(x: int): int {
  return if x == 0 then 1 else x * factorial(x-1);
}

proc testFillFact(test: borrowed Test) throws {
  test.skipIf(factorial(0) != 1,"Base condition is wrong in factorial");
  for i in 1..10 do
    factArray.push_back(factorial(i));
}

proc testSumFact(test: borrowed Test) throws {
  test.dependsOn(testFillFact);
  var s = 0;
  for i in 1..10 do
    s += factArray[i];
  test.assertGreaterThan(s,0);
}

UnitTest.main();

Output:

----------------------------------------------------------------------
Run 2 tests

OK

class Test¶

proc skip(reason: string = "") throws¶

Unconditionally skip a test.

Arguments:	reason : string – the reason for skipping
Throws TestSkipped:
	Always

proc skipIf(condition: bool, reason: string = "") throws¶

Skip a test if the condition is true.

Arguments:	condition : bool – the boolean condition reason : string – the reason for skipping
Throws TestSkipped:
	If the condition is true.

proc assertTrue(test: bool) throws¶

Assert that a boolean condition is true. If it is false, prints assert failed.

Arguments:	test : bool – the boolean condition
Throws AssertionError:
	If the assertion is false.

proc assertFalse(test: bool) throws¶

Assert that a boolean condition is false. If it is true, prints assert failed.

Arguments:	test : bool – the boolean condition
Throws AssertionError:
	If the assertion is true.

proc assertEqual(first, second) throws¶

Fail if the two objects are unequal as determined by the == operator.

Arguments:	first – The first object to compare. second – The second object to compare.
Throws AssertionError:
	If both the arguments are not equal.

proc assertNotEqual(first, second) throws¶

Assert that a first argument is not equal to second argument. Uses == operator and type to determine if both are equal or not.

Arguments:	first – The first object to compare. second – The second object to compare.
Throws AssertionError:
	If both the arguments are equal.

proc assertGreaterThan(first, second) throws¶

Assert that a first argument is greater than second argument. If it is false, prints assert failed and raises AssertionError.

Arguments:	first – The first object to compare. second – The second object to compare.
Throws AssertionError:
	If the first argument is not greater than second argument.

proc assertLessThan(first, second) throws¶

Assert that a first argument is less than second argument. If it is false, raises AssertionError.

Arguments:	first – The first object to compare. second – The second object to compare.
Throws AssertionError:
	If the first argument is not less than the second argument.

proc maxLocales(value: int) throws¶

Specify Max Number of Locales required to run the test

Arguments:	value : int. – Maximum number of locales with which the test can be ran.
Throws UnexpectedLocalesError:
	If value is less than 1 or minNumLocales

proc minLocales(value: int) throws¶

Specify Min Number of Locales required to run the test

Arguments:	value : int. – Minimum number of locales with which the test can be ran.
Throws UnexpectedLocalesError:
	If value is more than maxNumLocales

proc addNumLocales(locales: int ...?n) throws¶

To add locales in which test can be run.

Arguments:	locales – Multiple , separated locale values
Throws UnexpectedLocalesError:
	If locales are already added.

proc dependsOn(tests: argType ...?n) throws¶

Adds the tests in which the given test is depending.

Arguments:	tests – Multiple , separated First Class Test Functions.
Throws DependencyFound:
	If Called for the first time in a function.

proc main() throws¶

Runs the tests

Call this as

UnitTest.main();