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Diffstat (limited to 'taler-kotlin-android/src/test/java/net/taler/common/AmountTest.kt')
-rw-r--r-- | taler-kotlin-android/src/test/java/net/taler/common/AmountTest.kt | 372 |
1 files changed, 372 insertions, 0 deletions
diff --git a/taler-kotlin-android/src/test/java/net/taler/common/AmountTest.kt b/taler-kotlin-android/src/test/java/net/taler/common/AmountTest.kt new file mode 100644 index 0000000..1ea4e70 --- /dev/null +++ b/taler-kotlin-android/src/test/java/net/taler/common/AmountTest.kt @@ -0,0 +1,372 @@ +/* + * This file is part of GNU Taler + * (C) 2020 Taler Systems S.A. + * + * GNU Taler is free software; you can redistribute it and/or modify it under the + * terms of the GNU General Public License as published by the Free Software + * Foundation; either version 3, or (at your option) any later version. + * + * GNU Taler is distributed in the hope that it will be useful, but WITHOUT ANY + * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR + * A PARTICULAR PURPOSE. See the GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License along with + * GNU Taler; see the file COPYING. If not, see <http://www.gnu.org/licenses/> + */ + +package net.taler.common + +import android.os.Build +import org.junit.Assert.assertEquals +import org.junit.Assert.assertFalse +import org.junit.Assert.assertTrue +import org.junit.Test +import java.text.DecimalFormatSymbols +import kotlin.random.Random + +class AmountTest { + + companion object { + fun getRandomAmount() = getRandomAmount(getRandomString(1, Random.nextInt(1, 12))) + fun getRandomAmount(currency: String): Amount { + val value = Random.nextLong(0, Amount.MAX_VALUE) + val fraction = Random.nextInt(0, Amount.MAX_FRACTION) + return Amount(currency, value, fraction) + } + } + + @Test + fun testFromJSONString() { + var str = "TESTKUDOS:23.42" + var amount = Amount.fromJSONString(str) + assertEquals(str, amount.toJSONString()) + assertEquals("TESTKUDOS", amount.currency) + assertEquals(23, amount.value) + assertEquals((0.42 * 1e8).toInt(), amount.fraction) + + str = "EUR:500000000.00000001" + amount = Amount.fromJSONString(str) + assertEquals(str, amount.toJSONString()) + assertEquals("EUR", amount.currency) + assertEquals(500000000, amount.value) + assertEquals(1, amount.fraction) + + str = "EUR:1500000000.00000003" + amount = Amount.fromJSONString(str) + assertEquals(str, amount.toJSONString()) + assertEquals("EUR", amount.currency) + assertEquals(1500000000, amount.value) + assertEquals(3, amount.fraction) + } + + @Test + fun testToString() { + amountToString( + amount = Amount.fromString("KUDOS", "13.71"), + spec = CurrencySpecification( + name = "Test (Taler Demostrator)", + numFractionalInputDigits = 2, + numFractionalNormalDigits = 2, + numFractionalTrailingZeroDigits = 2, + altUnitNames = mapOf(0 to "ク"), + ), + rawStr = "13.71", + fraction = 71000000, + specAmount = "13.71", + noSpecAmount = "13.71", + currency = "KUDOS", + symbol = "ク", + ) + + amountToString( + amount = Amount.fromString("TESTKUDOS", "23.42"), + spec = CurrencySpecification( + name = "Test (Taler Unstable Demostrator)", + numFractionalInputDigits = 0, + numFractionalNormalDigits = 0, + numFractionalTrailingZeroDigits = 0, + altUnitNames = mapOf(0 to "テ"), + ), + rawStr = "23.42", + fraction = 42000000, + specAmount = "23", + noSpecAmount = "23.42", + currency = "TESTKUDOS", + symbol = "テ", + ) + + amountToString( + amount = Amount.fromString("BITCOINBTC", "0.00000001"), + spec = CurrencySpecification( + name = "Bitcoin", + numFractionalInputDigits = 8, + numFractionalNormalDigits = 8, + numFractionalTrailingZeroDigits = 0, + altUnitNames = mapOf( + 0 to "₿", + // TODO: uncomment when units get implemented + // and then write tests for units, please +// -1 to "d₿", +// -2 to "c₿", +// -3 to "m₿", +// -6 to "µ₿", +// -8 to "sat", + ), + ), + rawStr = "0.00000001", + fraction = 1, + specAmount = "0.00000001", + noSpecAmount = "0.00000001", + currency = "BITCOINBTC", + symbol = "₿", + ) + + val specEUR = CurrencySpecification( + name = "EUR", + numFractionalInputDigits = 2, + numFractionalNormalDigits = 2, + numFractionalTrailingZeroDigits = 2, + altUnitNames = mapOf(0 to "€"), + ) + + amountToString( + amount = Amount.fromString("EUR", "1500000000.00000003"), + spec = specEUR, + rawStr = "1500000000.00000003", + fraction = 3, + specAmount = "1,500,000,000.00", + noSpecAmount = "1,500,000,000.00000003", + currency = "EUR", + symbol = "€", + ) + + amountToString( + amount = Amount.fromString("EUR", "500000000.126"), + spec = specEUR, + rawStr = "500000000.126", + fraction = 12600000, + specAmount = "500,000,000.13", + noSpecAmount = "500,000,000.126", + currency = "EUR", + symbol = "€", + ) + + amountToString( + amount = Amount.fromString("NOSYMBOL", "13.24"), + spec = CurrencySpecification( + name = "No symbol!", + numFractionalInputDigits = 2, + numFractionalNormalDigits = 2, + numFractionalTrailingZeroDigits = 2, + altUnitNames = mapOf(), + ), + rawStr = "13.24", + fraction = 24000000, + specAmount = "13.24", + noSpecAmount = "13.24", + currency = "NOSYMBOL", + symbol = "NOSYMBOL", + ) + } + + private fun amountToString( + amount: Amount, + spec: CurrencySpecification, + rawStr: String, + fraction: Int, + specAmount: String, + noSpecAmount: String, + currency: String, + symbol: String, + ) { + val symbols = DecimalFormatSymbols.getInstance() + symbols.decimalSeparator = '.' + symbols.groupingSeparator = ',' + symbols.monetaryDecimalSeparator = '.' + if (Build.VERSION.SDK_INT >= 34) { + symbols.monetaryGroupingSeparator = ',' + } + + // Only the raw amount + assertEquals(rawStr, amount.amountStr) + assertEquals(fraction, amount.fraction) + + // The amount without currency spec + assertEquals("$noSpecAmount $currency", amount.toString(symbols = symbols)) + assertEquals(noSpecAmount, amount.toString(symbols = symbols, showSymbol = false)) + assertEquals("-$noSpecAmount $currency", amount.toString(symbols = symbols, negative = true)) + assertEquals("-$noSpecAmount", amount.toString(symbols = symbols, showSymbol = false, negative = true)) + + // The amount with currency spec + val withSpec = amount.withSpec(spec) + assertEquals(specAmount, withSpec.toString(symbols = symbols, showSymbol = false)) + assertEquals(specAmount, withSpec.toString(symbols = symbols, showSymbol = false)) + assertEquals("-$specAmount", withSpec.toString(symbols = symbols, showSymbol = false, negative = true)) + assertEquals("-$specAmount", withSpec.toString(symbols = symbols, showSymbol = false, negative = true)) + if (spec.symbol != null) { + assertEquals("${symbol}$specAmount", withSpec.toString(symbols = symbols)) + assertEquals("-${symbol}$specAmount", withSpec.toString(symbols = symbols, negative = true)) + } else { + assertEquals("$specAmount $currency", withSpec.toString(symbols = symbols)) + assertEquals("-$specAmount $currency", withSpec.toString(symbols = symbols, negative = true)) + } + } + + @Test + fun testFromJSONStringAcceptsMaxValuesRejectsAbove() { + val maxValue = 4503599627370496 + val str = "TESTKUDOS123:$maxValue.99999999" + val amount = Amount.fromJSONString(str) + assertEquals(str, amount.toJSONString()) + assertEquals("TESTKUDOS123", amount.currency) + assertEquals(maxValue, amount.value) + + // longer currency not accepted + assertThrows<AmountParserException>("longer currency was accepted") { + Amount.fromJSONString("TESTKUDOS1234:$maxValue.99999999") + } + + // max value + 1 not accepted + assertThrows<AmountParserException>("max value + 1 was accepted") { + Amount.fromJSONString("TESTKUDOS123:${maxValue + 1}.99999999") + } + + // max fraction + 1 not accepted + assertThrows<AmountParserException>("max fraction + 1 was accepted") { + Amount.fromJSONString("TESTKUDOS123:$maxValue.999999990") + } + } + + @Test + fun testFromJSONStringRejections() { + assertThrows<AmountParserException> { + Amount.fromJSONString("TESTKUDOS:0,5") + } + assertThrows<AmountParserException> { + Amount.fromJSONString("+TESTKUDOS:0.5") + } + assertThrows<AmountParserException> { + Amount.fromJSONString("0.5") + } + assertThrows<AmountParserException> { + Amount.fromJSONString(":0.5") + } + assertThrows<AmountParserException> { + Amount.fromJSONString("EUR::0.5") + } + assertThrows<AmountParserException> { + Amount.fromJSONString("EUR:.5") + } + } + + @Test + fun testAddition() { + assertEquals( + Amount.fromJSONString("EUR:2"), + Amount.fromJSONString("EUR:1") + Amount.fromJSONString("EUR:1") + ) + assertEquals( + Amount.fromJSONString("EUR:3"), + Amount.fromJSONString("EUR:1.5") + Amount.fromJSONString("EUR:1.5") + ) + assertEquals( + Amount.fromJSONString("EUR:500000000.00000002"), + Amount.fromJSONString("EUR:500000000.00000001") + Amount.fromJSONString("EUR:0.00000001") + ) + assertThrows<AmountOverflowException>("addition didn't overflow") { + Amount.fromJSONString("EUR:4503599627370496.99999999") + Amount.fromJSONString("EUR:0.00000001") + } + assertThrows<AmountOverflowException>("addition didn't overflow") { + Amount.fromJSONString("EUR:4000000000000000") + Amount.fromJSONString("EUR:4000000000000000") + } + } + + @Test + fun testTimes() { + assertEquals( + Amount.fromJSONString("EUR:2"), + Amount.fromJSONString("EUR:2") * 1 + ) + assertEquals( + Amount.fromJSONString("EUR:2"), + Amount.fromJSONString("EUR:1") * 2 + ) + assertEquals( + Amount.fromJSONString("EUR:4.5"), + Amount.fromJSONString("EUR:1.5") * 3 + ) + assertEquals(Amount.fromJSONString("EUR:0"), Amount.fromJSONString("EUR:1.11") * 0) + assertEquals(Amount.fromJSONString("EUR:1.11"), Amount.fromJSONString("EUR:1.11") * 1) + assertEquals(Amount.fromJSONString("EUR:2.22"), Amount.fromJSONString("EUR:1.11") * 2) + assertEquals(Amount.fromJSONString("EUR:3.33"), Amount.fromJSONString("EUR:1.11") * 3) + assertEquals(Amount.fromJSONString("EUR:4.44"), Amount.fromJSONString("EUR:1.11") * 4) + assertEquals(Amount.fromJSONString("EUR:5.55"), Amount.fromJSONString("EUR:1.11") * 5) + assertEquals( + Amount.fromJSONString("EUR:1500000000.00000003"), + Amount.fromJSONString("EUR:500000000.00000001") * 3 + ) + assertThrows<AmountOverflowException>("times didn't overflow") { + Amount.fromJSONString("EUR:4000000000000000") * 2 + } + } + + @Test + fun testSubtraction() { + assertEquals( + Amount.fromJSONString("EUR:0"), + Amount.fromJSONString("EUR:1") - Amount.fromJSONString("EUR:1") + ) + assertEquals( + Amount.fromJSONString("EUR:1.5"), + Amount.fromJSONString("EUR:3") - Amount.fromJSONString("EUR:1.5") + ) + assertEquals( + Amount.fromJSONString("EUR:500000000.00000001"), + Amount.fromJSONString("EUR:500000000.00000002") - Amount.fromJSONString("EUR:0.00000001") + ) + assertThrows<AmountOverflowException>("subtraction didn't underflow") { + Amount.fromJSONString("EUR:23.42") - Amount.fromJSONString("EUR:42.23") + } + assertThrows<AmountOverflowException>("subtraction didn't underflow") { + Amount.fromJSONString("EUR:0.5") - Amount.fromJSONString("EUR:0.50000001") + } + } + + @Test + fun testIsZero() { + assertTrue(Amount.zero("EUR").isZero()) + assertTrue(Amount.fromJSONString("EUR:0").isZero()) + assertTrue(Amount.fromJSONString("EUR:0.0").isZero()) + assertTrue(Amount.fromJSONString("EUR:0.00000").isZero()) + assertTrue((Amount.fromJSONString("EUR:1.001") - Amount.fromJSONString("EUR:1.001")).isZero()) + + assertFalse(Amount.fromJSONString("EUR:0.00000001").isZero()) + assertFalse(Amount.fromJSONString("EUR:1.0").isZero()) + assertFalse(Amount.fromJSONString("EUR:0001.0").isZero()) + } + + @Test + fun testComparison() { + assertTrue(Amount.fromJSONString("EUR:0") <= Amount.fromJSONString("EUR:0")) + assertTrue(Amount.fromJSONString("EUR:0") <= Amount.fromJSONString("EUR:0.00000001")) + assertTrue(Amount.fromJSONString("EUR:0") < Amount.fromJSONString("EUR:0.00000001")) + assertTrue(Amount.fromJSONString("EUR:0") < Amount.fromJSONString("EUR:1")) + assertEquals(Amount.fromJSONString("EUR:0"), Amount.fromJSONString("EUR:0")) + assertEquals(Amount.fromJSONString("EUR:42"), Amount.fromJSONString("EUR:42")) + assertEquals( + Amount.fromJSONString("EUR:42.00000001"), + Amount.fromJSONString("EUR:42.00000001") + ) + assertTrue(Amount.fromJSONString("EUR:42.00000001") >= Amount.fromJSONString("EUR:42.00000001")) + assertTrue(Amount.fromJSONString("EUR:42.00000002") >= Amount.fromJSONString("EUR:42.00000001")) + assertTrue(Amount.fromJSONString("EUR:42.00000002") > Amount.fromJSONString("EUR:42.00000001")) + assertTrue(Amount.fromJSONString("EUR:0.00000002") > Amount.fromJSONString("EUR:0.00000001")) + assertTrue(Amount.fromJSONString("EUR:0.00000001") > Amount.fromJSONString("EUR:0")) + assertTrue(Amount.fromJSONString("EUR:2") > Amount.fromJSONString("EUR:1")) + + assertThrows<IllegalStateException>("could compare amounts with different currencies") { + Amount.fromJSONString("EUR:0.5") < Amount.fromJSONString("USD:0.50000001") + } + } + +} |