lib.runTests

Evaluates a set of tests.

A test is an attribute set {expr, expected}, denoting an expression and its expected result.

The result is a list of failed tests, each represented as {name, expected, result},

• expected
  • What was passed as expected
• result
  • The actual result of the test

Used for regression testing of the functions in lib; see tests.nix for more examples.

Important: Only attributes that start with test are executed.

• If you want to run only a subset of the tests add the attribute tests = ["testName"];

Inputs

tests

Tests to run

Type

runTests :: {
  tests = [ String ];
  ${testName} :: {
    expr :: a;
    expected :: a;
  };
}
->
[
  {
    name :: String;
    expected :: a;
    result :: a;
  }
]

Examples

runTests {
  testAndOk = {
    expr = lib.and true false;
    expected = false;
  };
  testAndFail = {
    expr = lib.and true false;
    expected = true;
  };
}
->
[
  {
    name = "testAndFail";
    expected = true;
    result = false;
  }
]

Noogle detected

• lib.debug.runTests

runTests =
    tests:
    concatLists (
      attrValues (
        mapAttrs (
          name: test:
          let
            testsToRun = if tests ? tests then tests.tests else [ ];
          in
          if
            (substring 0 4 name == "test" || elem name testsToRun)
            && ((testsToRun == [ ]) || elem name tests.tests)
            && (test.expr != test.expected)

          then
            [
              {
                inherit name;
                expected = test.expected;
                result = test.expr;
              }
            ]
          else
            [ ]
        ) tests
      )
    );