From e7a62d472560daa02336b0c3405ba8a7f78d5d6b Mon Sep 17 00:00:00 2001
From: Frank Tang <ftang@chromium.org>
Date: Wed, 11 Sep 2024 16:16:43 -0700
Subject: [PATCH] ICU-22885 Add test to show the problem of DecimalFormat

---
 icu4c/source/test/intltest/numfmtst.cpp | 10 ++++++++++
 icu4c/source/test/intltest/numfmtst.h   |  1 +
 2 files changed, 11 insertions(+)

diff --git a/icu4c/source/test/intltest/numfmtst.cpp b/icu4c/source/test/intltest/numfmtst.cpp
index a37111a8540d..877e1bbcefa9 100644
--- a/icu4c/source/test/intltest/numfmtst.cpp
+++ b/icu4c/source/test/intltest/numfmtst.cpp
@@ -156,6 +156,7 @@ void NumberFormatTest::runIndexedTest( int32_t index, UBool exec, const char* &n
   TESTCASE_AUTO(TestFormatAttributes);
   TESTCASE_AUTO(TestFieldPositionIterator);
   TESTCASE_AUTO(TestDecimal);
+  TESTCASE_AUTO(TestDecimalFormatParse7E);
   TESTCASE_AUTO(TestCurrencyFractionDigits);
   TESTCASE_AUTO(TestExponentParse);
   TESTCASE_AUTO(TestExplicitParents);
@@ -6979,6 +6980,15 @@ void NumberFormatTest::TestDecimal() {
 #endif
 
 }
+void NumberFormatTest::TestDecimalFormatParse7E() {
+    UErrorCode  status = U_ZERO_ERROR;
+    UnicodeString testdata = u"~";
+    icu::Formattable result;
+    icu::DecimalFormat dfmt(testdata, status);
+    if (U_SUCCESS(status)) {
+        dfmt.parse(testdata, result, status);
+    }
+}
 
 void NumberFormatTest::TestCurrencyFractionDigits() {
     UErrorCode status = U_ZERO_ERROR;
diff --git a/icu4c/source/test/intltest/numfmtst.h b/icu4c/source/test/intltest/numfmtst.h
index 5bdbc131cda3..c23fc83daa2c 100644
--- a/icu4c/source/test/intltest/numfmtst.h
+++ b/icu4c/source/test/intltest/numfmtst.h
@@ -201,6 +201,7 @@ class NumberFormatTest: public CalendarTimeZoneTest {
     void TestLenientParse();
 
     void TestDecimal();
+    void TestDecimalFormatParse7E();
     void TestCurrencyFractionDigits();
 
     void TestExponentParse();