Soft Assertions

Normally, assertions like shouldBe throw an exception when they fail. But sometimes you want to perform multiple assertions in a test, and would like to see all of the assertions that failed. Kotest provides the assertSoftly function for this purpose.

assertSoftly {
  foo shouldBe bar
  foo should contain(baz)
}

If any assertions inside the block failed, the test will continue to run. All failures will be reported in a single exception at the end of the block.

Another version of assertSoftly takes a test target and lambda with test target as its receiver.

assertSoftly(foo) {
    shouldNotEndWith("b")
    length shouldBe 3
}

We can configure assert softly to be implicitly added to every test via project config.