Test a Map to be not empty.
Invert the following validators.
Test a Map to include any of the provided keys. The keys are tested by identity, not structure.
Rest ...keys: readonly T1[]The keys that could be a key in the Map.
Test a Map to include any of the provided values. The values are tested by identity, not structure.
Rest ...values: readonly T2[]The values that could be a value in the Map.
Test a Map to include all the provided keys. The keys are tested by identity, not structure.
Rest ...keys: readonly T1[]The keys that should be a key in the Map.
Test a Map to include all the provided values. The values are tested by identity, not structure.
Rest ...values: readonly T2[]The values that should be a value in the Map.
Test if the value matches a custom validation function. The validation function should return true if the value passes the function. If the function either returns false or a string, the function fails and the string will be used as error message.
Validation function.
Test all the keys in the Map to match the provided predicate.
The predicate that should be applied against every key in the Map.
Provide a new error message to be thrown when the validation fails.
ow('🌈', 'unicorn', ow.string.equals('🦄').message('Expected unicorn, got rainbow'));
//=> ArgumentError: Expected unicorn, got rainbow
ow('🌈', ow.string.minLength(5).message((value, label) => `Expected ${label}, to have a minimum length of 5, got \`${value}\``));
//=> ArgumentError: Expected string, to be have a minimum length of 5, got `🌈`
Test if the value matches a custom validation function. The validation function should return an object containing a validator and message. If the validator is false, the validation fails and the message will be used as error message. If the message is a function, the function is invoked with the label as argument to let you further customize the error message.
Test all the values in the Map to match the provided predicate.
The predicate that should be applied against every value in the Map.
Test a Map to be empty.