in.specmatic.core.pattern.EmptyStringPattern.kt Maven / Gradle / Ivy

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Turn your contracts into executable specifications. Contract Driven Development - Collaboratively Design & Independently Deploy MicroServices & MicroFrontends. Deprecation Notice for group ID "in.specmatic" ****************************************************************************************************** Updates for "specmatic-core" will no longer be available under the deprecated group ID "in.specmatic". Please update your dependencies to use the new group ID "io.specmatic". ******************************************************************************************************

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package `in`.specmatic.core.pattern

import `in`.specmatic.core.Resolver
import `in`.specmatic.core.Result
import `in`.specmatic.core.mismatchResult
import `in`.specmatic.core.pattern.config.NegativePatternConfiguration
import `in`.specmatic.core.value.*

object EmptyStringPattern : Pattern {
    override fun matches(sampleData: Value?, resolver: Resolver): Result {
        return when (sampleData) {
            EmptyString -> Result.Success()
            else -> mismatchResult("empty string", sampleData, resolver.mismatchMessages)
        }
    }

    override fun generate(resolver: Resolver): Value = StringValue("")
    override fun newBasedOn(row: Row, resolver: Resolver): Sequence> = sequenceOf(HasValue(this))
    override fun newBasedOn(resolver: Resolver): Sequence = sequenceOf(this)
    override fun negativeBasedOn(row: Row, resolver: Resolver, config: NegativePatternConfiguration): Sequence> {
        return sequenceOf(HasValue(this))
    }

    override fun parse(value: String, resolver: Resolver): Value {
        return when {
            value.isEmpty() -> EmptyString
            else -> throw ContractException("""No data was expected, but got "$value" instead""")
        }
    }

    override fun encompasses(otherPattern: Pattern, thisResolver: Resolver, otherResolver: Resolver, typeStack: TypeStack): Result {
        if(otherPattern is EmptyStringPattern) return Result.Success()
        return Result.Failure("No data was expected, but got \"${otherPattern.typeName}\" instead")
    }

    override fun listOf(valueList: List, resolver: Resolver): Value {
        return JSONArrayValue(valueList)
    }

    override val typeAlias: String?
        get() = null

    override val typeName: String = "nothing"

    override val pattern: Any = ""

    override fun toString(): String = "(nothing)"
}