Add unit tests on ref package

Author: mengdaming

ref/amount_test.go

@@ -0,0 +1,74 @@
+/*
+Copyright (c) 2025 Murex
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
+*/
+
+package ref
+
+import (
+	"fmt"
+	"github.com/stretchr/testify/assert"
+	"testing"
+)
+
+func Test_euros_and_cents_parsing(t *testing.T) {
+	tests := []struct {
+		amount float64
+		euros  int
+		cents  int
+	}{
+		{0.0, 0, 0},
+		{0.1, 0, 10},
+		{2.0, 2, 0},
+		{3.2, 3, 20},
+		{4.02, 4, 2},
+		{5.002, 5, 0},
+		{45.67, 45, 67},
+	}
+
+	for _, test := range tests {
+		t.Run(fmt.Sprintf("%.02f", test.amount), func(t *testing.T) {
+			euros, cents := eurosAndCents(test.amount)
+			assert.Equal(t, test.euros, euros)
+			assert.Equal(t, test.cents, cents)
+		})
+	}
+}
+
+func Test_amount_regexp(t *testing.T) {
+	tests := []struct {
+		amount float64
+		regexp string
+	}{
+		{0.0, "0[\\.,]00"},
+		{0.1, "0[\\.,]10"},
+		{2.0, "2[\\.,]00"},
+		{3.2, "3[\\.,]20"},
+		{4.02, "4[\\.,]02"},
+		{5.002, "5[\\.,]00"},
+		{45.67, "45[\\.,]67"},
+	}
+
+	for _, test := range tests {
+		t.Run(fmt.Sprintf("%.02f", test.amount), func(t *testing.T) {
+			assert.Equal(t, test.regexp, AmountRegexp(test.amount))
+		})
+	}
+}