[공통] util → framework 유틸 (ACM-CM-002)

boot/common-framework/src/test/java/com/klaro/acquirecore/framework/util/AmountUtilTest.java

@@ -0,0 +1,221 @@
+package com.klaro.acquirecore.framework.util;
+
+import org.junit.jupiter.api.Test;
+
+import java.math.BigDecimal;
+import java.math.RoundingMode;
+
+import static org.junit.jupiter.api.Assertions.*;
+
+class AmountUtilTest {
+
+    @Test
+    void of_withStringValue_returnsBigDecimal() {
+        BigDecimal result = AmountUtil.of("1234.56");
+        assertEquals(new BigDecimal("1234.56"), result);
+    }
+
+    @Test
+    void of_withLongValue_returnsBigDecimal() {
+        BigDecimal result = AmountUtil.of(1000L);
+        assertEquals(new BigDecimal("1000"), result);
+    }
+
+    @Test
+    void of_withDoubleValue_returnsBigDecimal() {
+        BigDecimal result = AmountUtil.of(1234.56);
+        assertEquals(new BigDecimal("1234.56"), result);
+    }
+
+    @Test
+    void add_addsTwoValues() {
+        BigDecimal a = new BigDecimal("100.50");
+        BigDecimal b = new BigDecimal("50.25");
+        BigDecimal result = AmountUtil.add(a, b);
+        assertEquals(new BigDecimal("150.75"), result);
+    }
+
+    @Test
+    void subtract_subtractsValues() {
+        BigDecimal a = new BigDecimal("100.50");
+        BigDecimal b = new BigDecimal("50.25");
+        BigDecimal result = AmountUtil.subtract(a, b);
+        assertEquals(new BigDecimal("50.25"), result);
+    }
+
+    @Test
+    void multiply_multipliesValues() {
+        BigDecimal a = new BigDecimal("10.00");
+        BigDecimal b = new BigDecimal("5.00");
+        BigDecimal result = AmountUtil.multiply(a, b);
+        assertEquals(new BigDecimal("50.00"), result);
+    }
+
+    @Test
+    void divide_dividesValues() {
+        BigDecimal dividend = new BigDecimal("100.00");
+        BigDecimal divisor = new BigDecimal("4.00");
+        BigDecimal result = AmountUtil.divide(dividend, divisor);
+        assertEquals(new BigDecimal("25.00"), result);
+    }
+
+    @Test
+    void divide_byZero_throwsException() {
+        BigDecimal dividend = new BigDecimal("100.00");
+        BigDecimal divisor = BigDecimal.ZERO;
+        assertThrows(ArithmeticException.class, () -> AmountUtil.divide(dividend, divisor));
+    }
+
+    @Test
+    void round_roundsToDefaultScale() {
+        BigDecimal value = new BigDecimal("123.456");
+        BigDecimal result = AmountUtil.round(value);
+        assertEquals(new BigDecimal("123.46"), result);
+    }
+
+    @Test
+    void round_roundsWithCustomScaleAndRoundingMode() {
+        BigDecimal value = new BigDecimal("123.456");
+        BigDecimal result = AmountUtil.round(value, 3, RoundingMode.HALF_UP);
+        assertEquals(new BigDecimal("123.456"), result);
+    }
+
+    @Test
+    void percentage_calculatesCorrectPercentage() {
+        BigDecimal value = new BigDecimal("1000.00");
+        BigDecimal percentage = new BigDecimal("10");
+        BigDecimal result = AmountUtil.percentage(value, percentage);
+        assertEquals(new BigDecimal("100.00"), result);
+    }
+
+    @Test
+    void addPercentage_addsPercentageToValue() {
+        BigDecimal value = new BigDecimal("1000.00");
+        BigDecimal percentage = new BigDecimal("10");
+        BigDecimal result = AmountUtil.addPercentage(value, percentage);
+        assertEquals(new BigDecimal("1100.00"), result);
+    }
+
+    @Test
+    void subtractPercentage_subtractsPercentageFromValue() {
+        BigDecimal value = new BigDecimal("1000.00");
+        BigDecimal percentage = new BigDecimal("10");
+        BigDecimal result = AmountUtil.subtractPercentage(value, percentage);
+        assertEquals(new BigDecimal("900.00"), result);
+    }
+
+    @Test
+    void formatKoreanWon_formatsCorrectly() {
+        BigDecimal amount = new BigDecimal("1234567");
+        String result = AmountUtil.formatKoreanWon(amount);
+        assertEquals("₩1,234,567", result);
+    }
+
+    @Test
+    void formatCurrency_formatsWithTwoDecimals() {
+        BigDecimal amount = new BigDecimal("1234.5");
+        String result = AmountUtil.formatCurrency(amount);
+        assertEquals("1,234.50", result);
+    }
+
+    @Test
+    void compare_comparesValues() {
+        BigDecimal a = new BigDecimal("100.00");
+        BigDecimal b = new BigDecimal("200.00");
+        assertEquals(-1, AmountUtil.compare(a, b));
+        assertEquals(1, AmountUtil.compare(b, a));
+        assertEquals(0, AmountUtil.compare(a, new BigDecimal("100.00")));
+    }
+
+    @Test
+    void isGreaterThan_returnsCorrectResult() {
+        BigDecimal a = new BigDecimal("200.00");
+        BigDecimal b = new BigDecimal("100.00");
+        assertTrue(AmountUtil.isGreaterThan(a, b));
+        assertFalse(AmountUtil.isGreaterThan(b, a));
+    }
+
+    @Test
+    void isLessThan_returnsCorrectResult() {
+        BigDecimal a = new BigDecimal("100.00");
+        BigDecimal b = new BigDecimal("200.00");
+        assertTrue(AmountUtil.isLessThan(a, b));
+        assertFalse(AmountUtil.isLessThan(b, a));
+    }
+
+    @Test
+    void isZero_withZeroValue_returnsTrue() {
+        assertTrue(AmountUtil.isZero(BigDecimal.ZERO));
+    }
+
+    @Test
+    void isPositive_withPositiveValue_returnsTrue() {
+        assertTrue(AmountUtil.isPositive(new BigDecimal("1.00")));
+    }
+
+    @Test
+    void isNegative_withNegativeValue_returnsTrue() {
+        assertTrue(AmountUtil.isNegative(new BigDecimal("-1.00")));
+    }
+
+    @Test
+    void abs_returnsAbsoluteValue() {
+        BigDecimal value = new BigDecimal("-100.00");
+        BigDecimal result = AmountUtil.abs(value);
+        assertEquals(new BigDecimal("100.00"), result);
+    }
+
+    @Test
+    void negate_negatesValue() {
+        BigDecimal value = new BigDecimal("100.00");
+        BigDecimal result = AmountUtil.negate(value);
+        assertEquals(new BigDecimal("-100.00"), result);
+    }
+
+    @Test
+    void max_returnsMaximumValue() {
+        BigDecimal a = new BigDecimal("100.00");
+        BigDecimal b = new BigDecimal("200.00");
+        BigDecimal result = AmountUtil.max(a, b);
+        assertEquals(new BigDecimal("200.00"), result);
+    }
+
+    @Test
+    void min_returnsMinimumValue() {
+        BigDecimal a = new BigDecimal("100.00");
+        BigDecimal b = new BigDecimal("200.00");
+        BigDecimal result = AmountUtil.min(a, b);
+        assertEquals(new BigDecimal("100.00"), result);
+    }
+
+    @Test
+    void parseAmount_withCurrencySymbol_parsesCorrectly() {
+        BigDecimal result = AmountUtil.parseAmount("₩1,000,000");
+        assertEquals(new BigDecimal("1000000"), result);
+    }
+
+    @Test
+    void isValidAmount_withValidAmount_returnsTrue() {
+        assertTrue(AmountUtil.isValidAmount("₩1,000,000"));
+        assertTrue(AmountUtil.isValidAmount("1000.50"));
+    }
+
+    @Test
+    void isValidAmount_withInvalidAmount_returnsFalse() {
+        assertFalse(AmountUtil.isValidAmount("invalid"));
+        assertFalse(AmountUtil.isValidAmount(null));
+    }
+
+    @Test
+    void fromCents_convertsToDecimal() {
+        BigDecimal result = AmountUtil.fromCents(123456);
+        assertEquals(new BigDecimal("1234.56"), result);
+    }
+
+    @Test
+    void toCents_convertsToCents() {
+        BigDecimal amount = new BigDecimal("1234.56");
+        long result = AmountUtil.toCents(amount);
+        assertEquals(123456, result);
+    }
+}