wren-assert

Minimalistic assertion library for unit testing in Wren.

Installation

Copy Assert.wren and LICENSE to your project.

Usage

The Assert class is inspired by Node.js's assert module, so the methods are similar. When an assert fails, it will issue a Fiber.abort().

Example

import "./Assert" for Assert

Assert.equal(5, 5)
Assert.equal(5, 5, "Expected 5 to equal 5")
Assert[5, 5]
Assert[5, 5, "Expected 5 to equal 5"]

Assert.notEqual(5, 10)
Assert.notEqual(5, 10, "Expected 5 to not equal 10")

Assert.ok(true)
Assert.ok(true, "True should be truthy")
Assert[true]

Assert.notOk(false)
Assert.notOk(false, "False should be falsey")

Assert.aborts(Fn.new {
  Fiber.abort("This function is expected to abort.")
})

Assert.doesNotAbort(Fn.new {
  System.print("This function does not abort, as expected.")
})

Assert.typeOf(5, Num)
Assert.typeOf(5, Num, "Expected the number to be a Num.")

Assert.notTypeOf("Hello World!", Num)
Assert.notTypeOf("Hello World!", Num, "Expected the String to not be a Num.")

Assert.countOf([1, 2, 3], 3)
Assert.countOf([1, 2, 3], 3, "Expect a list count of 3.")

Assert.deepEqual([1, 2, 3], [1, 2, 3])
Assert.deepEqual([1, 2, 3], [1, 2, 3], "Expected the two lists to be the same.")

Assert.exists(5)
Assert.exists(5, "Expected 5 to not be null")

Assert.notExists(null)
Assert.notExists(null, "Expected null to be null")

Assert.contains([1, 2, 3], 2)
Assert.contains([1, 2, 3], 2, "Expected two to be in the sequence")

Assert.disabled = true // Disables assertion checks

API

Assert.equal(actual, expected, [message])
Assert[actual, expected, [message]]
Assert.notEqual(actual, expected, [message])
Assert.ok(value, [message])
Assert[value]
Assert.notOk(value, [message])
Assert.aborts(fn, [message])
Assert.doesNotAbort(fn, [message])
Assert.typeOf(object, type, [message])
Assert.notTypeOf(object, type, [message])
Assert.countOf(list, count, [message])
Assert.deepEqual(actual, expected, [message])
Assert.exists(value, [message])
Assert.notExists(value, [message])
Assert.contains(haystack, needle, [message])
Assert.disabled = true // Disables assertion checks

Development

Use wren-cli to run the tests...

wren_cli tests.wren

License

MIT