assert multimethod

Methods

assert(val:Any, pattern:Any, msg:Str='Assertion failed') Source: stdlib.ngs:301

Throws AssertFail with given message if val does not match the pattern

Returns

val

Example

my_template.get('concept', []).assert(Arr)
assert(loginResult, {'access_token': Str}, "access_token must be present in response")

assert(val:Any, pattern:Any, e:Exception) Source: stdlib.ngs:308

Throws e with given message if val does not match the pattern

Returns

val

assert(val:Any, msg:Str='Assertion failed') Source: stdlib.ngs:324

Throws AssertFail with given message if val is falsy

Parameters

val	if evaluates to false, causes AssertFail exception
msg	message for the exception, defaults to "Assertion failed"

Returns

val

Example

my_array=[]
# ... Code that adds elements to my_array ...
assert(my_array.len() > 3, "my_array must have more than 3 elements")  # AssertFail exception, with the given message

assert(f:Fun, t:Type, msg:Str='Assertion failed') Source: stdlib.ngs:334

Throws AssertFail with given function does not throw exception of the given type.

Parameters

f	Fun
t	Subtype of Exception

Returns

The exception

Example

assert({1/0}, DivisionByZero)

assert(p:Path) Source: stdlib.ngs:5926

Checks that the given path exists. Throws AssertFail otherwise.

Returns

p

assert(p:Program) Source: stdlib.ngs:5958

Checks that given program is found in path. Throws AssertFail otherwise.

Returns

p