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/*
* Copyright 2010-2018 JetBrains s.r.o. Use of this source code is governed by the Apache 2.0 license
* that can be found in the license/LICENSE.txt file.
*/
package test.numbers
import java.math.BigInteger
import java.math.BigDecimal
import kotlin.test.*
import java.math.MathContext
import java.math.RoundingMode
class BigNumbersTest {
@Test fun testBigInteger() {
val a = BigInteger("2")
val b = BigInteger("3")
assertEquals(BigInteger("5"), a + b)
assertEquals(BigInteger("-1"), a - b)
assertEquals(BigInteger("6"), a * b)
assertEquals(BigInteger("0"), a / b)
assertEquals(BigInteger("-2"), -a)
assertEquals(BigInteger("-2"), -a % b)
assertEquals(BigInteger("1"), (-a).mod(b))
assertEquals(BigInteger("-2"), (-a).remainder(b))
assertEquals(BigInteger("3"), a.inc())
assertEquals(BigInteger("1"), a.dec())
assertEquals(BigInteger("-3"), a.inv())
assertEquals(BigInteger("2"), a and b)
assertEquals(BigInteger("3"), a or b)
assertEquals(BigInteger("1"), a xor b)
assertEquals(BigInteger("4"), a shl 1)
assertEquals(BigInteger("1"), a shr 1)
assertEquals(BigInteger("0"), a shr 2)
assertEquals(BigInteger("-4"), -a shl 1)
assertEquals(BigInteger("-1"), -a shr 1)
assertEquals(BigInteger("-1"), -a shr 2)
assertEquals(BigInteger("2"), 2.toBigInteger())
assertEquals(BigInteger("-3"), -3L.toBigInteger())
assertEquals(BigDecimal("2"), a.toBigDecimal())
assertEquals(BigDecimal("0.02"), a.toBigDecimal(2))
assertEquals(BigDecimal("2E+2"), a.toBigDecimal(-2))
assertEquals(BigDecimal("2.6E+3"), BigInteger("253").toBigDecimal(-1, MathContext(2, RoundingMode.UP)))
assertEquals(BigDecimal("2.6E+2"), BigInteger("253").toBigDecimal(mathContext = MathContext(2, RoundingMode.UP)))
assertEquals(BigDecimal("3"), BigInteger("253").toBigDecimal(2, MathContext(1, RoundingMode.UP)))
var c = 2.toBigInteger()
assertEquals(BigInteger("2"), c++)
assertEquals(BigInteger("3"), c)
assertEquals(BigInteger("4"), ++c)
assertEquals(BigInteger("4"), c)
assertEquals(BigInteger("4"), c--)
assertEquals(BigInteger("3"), c)
assertEquals(BigInteger("2"), --c)
assertEquals(BigInteger("2"), c)
}
@Test fun testBigDecimal() {
val a = BigDecimal("2")
val b = BigDecimal("3")
assertEquals(BigDecimal("5"), a + b)
assertEquals(BigDecimal("-1"), a - b)
assertEquals(BigDecimal("6"), a * b)
assertEquals(BigDecimal("2"), BigDecimal("4") / a)
assertEquals(BigDecimal("-2"), -a)
assertEquals(BigDecimal("-2"), -a % b)
assertEquals(BigDecimal("-2"), @Suppress("DEPRECATION_ERROR") (-a).mod(b))
assertEquals(BigDecimal("-2"), (-a).rem(b))
assertEquals(BigDecimal("3"), a.inc())
assertEquals(BigDecimal("1"), a.dec())
assertEquals(BigDecimal("2"), 2.toBigDecimal())
assertEquals(BigDecimal("-3"), -3L.toBigDecimal())
assertEquals(BigDecimal("2.0"), 2f.toBigDecimal())
assertEquals(BigDecimal("0.5"), 0.5.toBigDecimal())
var c = "1.5".toBigDecimal()
assertEquals(BigDecimal("1.5"), c++)
assertEquals(BigDecimal("2.5"), c)
assertEquals(BigDecimal("3.5"), ++c)
assertEquals(BigDecimal("3.5"), c)
assertEquals(BigDecimal("3.5"), c--)
assertEquals(BigDecimal("2.5"), c)
assertEquals(BigDecimal("1.5"), --c)
assertEquals(BigDecimal("1.5"), c)
}
@Test fun bigDecimalDivRounding() {
val (d1, d2, d3, d4, d5) = (1..5).map { BigDecimal(it.toString()) }
val d7 = BigDecimal("7")
assertEquals(d1, d2 / d3)
assertEquals(d2, d3 / d2)
assertEquals(d2, d5 / d2)
assertEquals(d4, d7 / d2)
assertEquals(d1, d7 / d5)
}
}
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