Adjust tests to match behavior

Author: mborland

test/test_to_string.cpp

@@ -13,19 +13,34 @@ using namespace boost::decimal;
 
 #if !defined(BOOST_DECIMAL_DISABLE_CLIB)
 
+#ifdef _MSC_VER
+#pragma warning(push)
+#pragma warning(disable:4127)
+#endif
+
 template <BOOST_DECIMAL_DECIMAL_FLOATING_TYPE T>
 void test()
 {
-    BOOST_TEST_EQ(to_string(T{1}), "1.000000");
-    BOOST_TEST_EQ(to_string(T{10}), "10.000000");
-    BOOST_TEST_EQ(to_string(T{100}), "100.000000");
-    BOOST_TEST_EQ(to_string(T{1000}), "1000.000000");
-    BOOST_TEST_EQ(to_string(T{10000}), "10000.000000");
-    BOOST_TEST_EQ(to_string(T{210000}), "210000.000000");
-    BOOST_TEST_EQ(to_string(T{2100000}), "2100000.000000");
-    BOOST_TEST_EQ(to_string(T{21U, 6, true}), "-21000000.000000");
-    BOOST_TEST_EQ(to_string(T{211U, 6, true}), "-211000000.000000");
-    BOOST_TEST_EQ(to_string(T{2111U, 6, true}), "-2111000000.000000");
+    BOOST_TEST_EQ(to_string(T{1}), "1");
+    BOOST_TEST_EQ(to_string(T{10}), "10");
+    BOOST_TEST_EQ(to_string(T{100}), "100");
+    BOOST_TEST_EQ(to_string(T{1000}), "1000");
+    BOOST_TEST_EQ(to_string(T{10000}), "10000");
+    BOOST_TEST_EQ(to_string(T{210000}), "210000");
+    BOOST_TEST_EQ(to_string(T{2100000}), "2100000");
+
+    BOOST_DECIMAL_IF_CONSTEXPR (detail::decimal_val_v<T> > 32)
+    {
+        BOOST_TEST_EQ(to_string(T{21U, 6, true}), "-21000000");
+        BOOST_TEST_EQ(to_string(T{211U, 6, true}), "-211000000");
+        BOOST_TEST_EQ(to_string(T{2111U, 6, true}), "-2111000000");
+    }
+    else
+    {
+        BOOST_TEST_EQ(to_string(T{21U, 6, true}), "-2.1e+07");
+        BOOST_TEST_EQ(to_string(T{211U, 6, true}), "-2.11e+08");
+        BOOST_TEST_EQ(to_string(T{2111U, 6, true}), "-2.111e+09");
+    }
 
     BOOST_TEST_EQ(to_string(std::numeric_limits<T>::infinity()), "inf");
     BOOST_TEST_EQ(to_string(-std::numeric_limits<T>::infinity()), "-inf");
@@ -35,6 +50,10 @@ void test()
     BOOST_TEST_EQ(to_string(-std::numeric_limits<T>::signaling_NaN()), "-nan(snan)");
 }
 
+#ifdef _MSC_VER
+#pragma warning(pop)
+#endif
+
 int main()
 {
     test<decimal32_t>();