33 lines
705 B
JavaScript
33 lines
705 B
JavaScript
const constants = require('./constants')
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const symbols = {
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[constants.EQ]: '=',
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[constants.LT]: '<',
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[constants.LTE]: '<=',
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[constants.GT]: '>',
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[constants.GTE]: '>='
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}
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module.exports = class Comparator {
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constructor (operator, version) {
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this.operator = operator
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this.version = version
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}
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test (version) {
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const result = version.compare(this.version)
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switch (this.operator) {
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case constants.LT: return result < 0
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case constants.LTE: return result <= 0
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case constants.GT: return result > 0
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case constants.GTE: return result >= 0
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default: return result === 0
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}
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}
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toString () {
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return symbols[this.operator] + this.version
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}
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}
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