Initial commit

tests/Pest/MathTest.php

@@ -0,0 +1,44 @@
+<?php
+
+use ArchTech\Money\CurrencyManager;
+use ArchTech\Money\Tests\Currencies\CZK;
+
+test('money is rounded to its math decimals after each operation', function () {
+    expect(
+        money(33)->times(3.03)->value() // 0.9999
+    )->toBe(100);
+});
+
+test('operations use the math decimals even if the display decimals are different', function () {
+    currencies()->add(CZK::class); // uses 0 display decimals
+
+    $money = money(33, 'CZK')->times(3); // 0.99
+    expect($money->value())->toBe(99);
+    expect($money->formatted())->toBe('1 Kč');
+
+    $money = money(33, 'CZK')->times(3.03); // 0.9999
+    expect($money->value())->toBe(100);
+    expect($money->formatted())->toBe('1 Kč');
+});
+
+test('rounding is not applied between operations', function () {
+    currencies()->add(CZK::class);
+
+    // 99
+    $money = money(33, 'CZK')->times(3);
+    expect($money->value())->toBe(99);
+    expect($money->rounded()->value())->toBe(100);
+    expect($money->rounding())->toBe(1);
+
+    // 139
+    $money = $money->add(40);
+    expect($money->value())->toBe(139);
+    expect($money->rounded()->value())->toBe(100);
+    expect($money->rounding())->toBe(-39);
+
+    // 151
+    $money = $money->add(12);
+    expect($money->value())->toBe(151);
+    expect($money->rounded()->value())->toBe(200);
+    expect($money->rounding())->toBe(49);
+});