Add additional powers of ten testing

Author: mborland

test/test_to_chars.cpp

@@ -774,6 +774,25 @@ void test_777()
     test_value(value3, "-2111000000", chars_format::fixed, 0);
 }
 
+template <typename T>
+void test_more_powers_10()
+{
+    test_value(T{1, -6}, "0.000001", chars_format::fixed);
+    test_value(T{1, -5}, "0.00001", chars_format::fixed);
+    test_value(T{1, -4}, "0.0001", chars_format::fixed);
+    test_value(T{1, -3}, "0.001", chars_format::fixed);
+    test_value(T{1, -2}, "0.01", chars_format::fixed);
+    test_value(T{1, -1}, "0.1", chars_format::fixed);
+    test_value(T{1, 0}, "1", chars_format::fixed);
+    test_value(T{1, 1}, "10", chars_format::fixed);
+    test_value(T{1, 2}, "100", chars_format::fixed);
+    test_value(T{1, 3}, "1000", chars_format::fixed);
+    test_value(T{1, 4}, "10000", chars_format::fixed);
+    test_value(T{1, 5}, "100000", chars_format::fixed);
+    test_value(T{1, 6}, "1000000", chars_format::fixed);
+    test_value(T{1, 7}, "10000000", chars_format::fixed);
+}
+
 int main()
 {
     test_non_finite_values<decimal32>();
@@ -884,6 +903,10 @@ int main()
     test_777<decimal64_fast>();
     test_777<decimal128_fast>();
 
+    test_more_powers_10<decimal32>();
+    test_more_powers_10<decimal64>();
+    test_more_powers_10<decimal128>();
+
     return boost::report_errors();
 }