ensure

assert given condition is true, or exit

Parameters

ensure condition :block

Attributes

that:stringprints a custom message when ensure fails

Returns

  • :nothing

Examples

copy
num: input "give me a positive number"

ensure [num > 0]

print "good, the number is positive indeed. let's continue..."

copy
ensure.that: "Wrong calc" ->  0 = 1 + 1
; >> Assertion | "Wrong calc": [0 = 1 + 1]
;        error |

Related