| 1 | const isNotString = val => typeof val !== 'string' || val.length === 0
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| 2 |
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| 3 | module.exports.isNotString = isNotString
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| 4 | module.exports.isString = function isString (Err, value, label, claim, required = false) {
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| 5 | if (required && value === undefined) {
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| 6 | throw new Err(`${label} is missing`, claim, 'missing')
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| 7 | }
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| 8 |
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| 9 | if (value !== undefined && isNotString(value)) {
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| 10 | throw new Err(`${label} must be a string`, claim, 'invalid')
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| 11 | }
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| 12 | }
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