Validations

A step's validate: entries check the outputs it published. input names one of the step's output fields — a dotted name reaches inside it. The operator is given either in with: (validate/assert + operator: equals) or as a suffix of uses (validate/assert/equals); when neither names one, not_null applies. severity is HARD (default, fails the step) or SOFT (reported as a warning).

Assertion kinds

uses	Checks	Reads from with:
validate/assert	Compare the output named by input under operator.	input, operator, operands, severity
validate/field	Compare the value at path inside the output named by input under operator.	input, path, operator, operands, severity
validate/schema	Validate the output named by input against the JSON Schema given as schema.	input, schema, severity

Operators

The same operators are used by validate/assert, validate/field and the Condition of flow/if. An operand the operator does not read is rejected rather than ignored.

Operator	Operands	Fails with
not_null	—	Expected a non-null value, got <input>
is_null	—	Expected null, got <input>
not_empty	—	Expected a non-empty value, got <input>
equals	value	Expected <value>, got <input>
not_equals	value	Expected a value other than <value>, got <input>
contains	value	Expected <input> to contain <value>
not_contains	value	Expected <input> to NOT contain <value>
matches_regex	value	Pattern <value> not matched in <input>
one_of	value	Expected <input> to be one of <value>
none_of	value	Expected <input> to be none of <value>
has_key	value	Expected <input> to have key <value>
not_has_key	value	Expected <input> to NOT have key <value>
gt	value	Expected <input> to be greater than <value>
gte	value	Expected <input> to be greater than or equal to <value>
lt	value	Expected <input> to be less than <value>
lte	value	Expected <input> to be less than or equal to <value>
length_equals	value	Expected <input> to have length <value>
length_gt	value	Expected <input> to be longer than <value>
length_lt	value	Expected <input> to be shorter than <value>
between	min, max	Expected <input> to be between <min> and <max>