com.natpryce.hamkrest.internal.kt Maven / Gradle / Ivy

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@file:JvmName("Internal__do_not_use_directly")

package com.natpryce.hamkrest

import java.util.ArrayList

internal fun match(comparisonResult: Boolean, describeMismatch: () -> String): MatchResult =
        if (comparisonResult) {
            MatchResult.Match
        } else {
            MatchResult.Mismatch(describeMismatch())
        }

internal fun identifierToDescription(id: String) = identifierToWords(id).joinToString(" ")

internal fun identifierToNegatedDescription(id: String): String {
    val words = identifierToWords(id)
    val first = words[0]
    val rest = words.drop(1).joinToString(" ")

    return when (first) {
        "is" -> "is not ${rest}"
        "has" -> "does not have ${rest}"
        else -> "not ${first} ${rest}"
    }
}

fun identifierToWords(s: String): List {
    val words: MutableList = ArrayList()
    val buf = StringBuilder()

    for ((prev, c) in (s[0] + s).zip(s)) {
        if (isWordStart(prev, c)) {
            if (buf.isNotEmpty()) {
                words.add(buf.toString())
                buf.setLength(0)
            }
        }

        if (isWordPart(c)) {
            buf.append(c.toLowerCase())
        }
    }

    words.add(buf.toString())

    return words
}

internal fun isWordPart(c: Char): Boolean = c.isLetterOrDigit()

internal fun isWordStart(prev: Char, c: Char): Boolean = when {
    c.isLetter() != prev.isLetter() -> true
    prev.isLowerCase() && c.isUpperCase() -> true
    else -> false
}