Ilya Matveev
80 lines
3.1 KiB
Kotlin
80 lines
3.1 KiB
Kotlin
import kotlin.test.*
|
|
|
|
|
|
private fun <T : Any> compareConversion(convertOrFail: (String) -> T,
|
|
convertOrNull: (String) -> T?,
|
|
equality: (T, T?) -> Boolean = { a, b -> a == b },
|
|
assertions: ConversionContext<T>.() -> Unit) {
|
|
ConversionContext(convertOrFail, convertOrNull, equality).assertions()
|
|
}
|
|
|
|
|
|
private fun <T : Any> compareConversionWithRadix(convertOrFail: String.(Int) -> T,
|
|
convertOrNull: String.(Int) -> T?,
|
|
assertions: ConversionWithRadixContext<T>.() -> Unit) {
|
|
ConversionWithRadixContext(convertOrFail, convertOrNull).assertions()
|
|
}
|
|
|
|
|
|
private class ConversionContext<T: Any>(val convertOrFail: (String) -> T,
|
|
val convertOrNull: (String) -> T?,
|
|
val equality: (T, T?) -> Boolean) {
|
|
|
|
private fun assertEquals(expected: T, actual: T?, input: String, operation: String) {
|
|
assertTrue(equality(expected, actual), "Expected $operation('$input') to produce $expected but was $actual")
|
|
}
|
|
|
|
fun assertProduces(input: String, output: T) {
|
|
assertEquals(output, convertOrFail(input), input, "convertOrFail")
|
|
assertEquals(output, convertOrNull(input), input, "convertOrNull")
|
|
}
|
|
|
|
fun assertFailsOrNull(input: String) {
|
|
assertFailsWith<NumberFormatException>("Expected to fail on input \"$input\"") { convertOrFail(input) }
|
|
assertNull(convertOrNull(input), message = "On input \"$input\"")
|
|
}
|
|
}
|
|
|
|
private class ConversionWithRadixContext<T: Any>(val convertOrFail: (String, Int) -> T,
|
|
val convertOrNull: (String, Int) -> T?) {
|
|
fun assertProduces(radix: Int, input: String, output: T) {
|
|
assertEquals(output, convertOrFail(input, radix))
|
|
assertEquals(output, convertOrNull(input, radix))
|
|
}
|
|
|
|
fun assertFailsOrNull(radix: Int, input: String) {
|
|
assertFailsWith<NumberFormatException>("Expected to fail on input \"$input\" with radix $radix",
|
|
{ convertOrFail(input, radix) })
|
|
|
|
assertNull(convertOrNull(input, radix), message = "On input \"$input\" with radix $radix")
|
|
}
|
|
}
|
|
|
|
private fun doubleTotalOrderEquals(a: Double?, b: Double?): Boolean {
|
|
if (a != null && b != null && a.isNaN() && b.isNaN()) {
|
|
return true
|
|
}
|
|
return a == b
|
|
}
|
|
|
|
fun box() {
|
|
compareConversion(String::toDouble, String::toDoubleOrNull, ::doubleTotalOrderEquals) {
|
|
assertProduces("-77", -77.0)
|
|
assertProduces("77.", 77.0)
|
|
assertProduces("77.0", 77.0)
|
|
assertProduces("-1.77", -1.77)
|
|
assertProduces("+.77", 0.77)
|
|
assertProduces("\t-77 \n", -77.0)
|
|
assertProduces("7.7e1", 77.0)
|
|
assertProduces("+770e-1", 77.0)
|
|
|
|
assertProduces("-NaN", -Double.NaN)
|
|
assertProduces("+Infinity", Double.POSITIVE_INFINITY)
|
|
|
|
assertFailsOrNull("7..7")
|
|
assertFailsOrNull("007 not a number")
|
|
assertFailsOrNull("")
|
|
assertFailsOrNull(" ")
|
|
}
|
|
}
|