初始化

API/internal/billing/points_test.go

@@ -0,0 +1,30 @@
+// 积分账务单元测试，验证积分精度解析和非法输入处理。
+package billing
+
+import "testing"
+
+// TestParsePointCents 验证积分字符串能够稳定转换为整数分值。
+func TestParsePointCents(t *testing.T) {
+	tests := map[string]int64{
+		"0":      0,
+		"1":      100,
+		"1.2":    120,
+		"1.23":   123,
+		"1.2300": 123,
+		"999.99": 99999,
+	}
+	for input, expected := range tests {
+		actual, err := parsePointCents(input)
+		if err != nil {
+			t.Fatalf("parse %q: %v", input, err)
+		}
+		if actual != expected {
+			t.Fatalf("parse %q: expected %d, got %d", input, expected, actual)
+		}
+	}
+	for _, input := range []string{"", "-1", "1.234", "abc"} {
+		if _, err := parsePointCents(input); err == nil {
+			t.Fatalf("expected %q to be rejected", input)
+		}
+	}
+}