theshoeshiner commented on code in PR #1062:
URL: https://github.com/apache/commons-lang/pull/1062#discussion_r1223208339
##########
src/test/java/org/apache/commons/lang3/time/DurationFormatUtilsTest.java:
##########
@@ -632,4 +632,31 @@ public void testLowDurations() {
}
}
+ @Test
+ public void testUnmatchedOptionalToken() {
+ assertThrows(IllegalArgumentException.class, () ->
DurationFormatUtils.formatDuration(1, "[s"));
Review Comment:
Nesting has little value that I can see, so simplest solution will be to
catch any nesting and throw an IllegalArgumentException. That will prevent
unbalancing issues since the current optional state is tracked with a boolean,
similar to literals, and we can easily detect attempts to nest.
Multiple optional blocks are supported by default (though realistic use
cases may be few). If you wanted to always show minutes, but omit zero-value
hours and seconds, then the format `[H'h ']m'm'[s's ']` will produce values
like:
```
254h16m
15m15s
0m9s
```
Added
https://github.com/apache/commons-lang/pull/1062/commits/12bf4b67ef7545789b97f0785231c64d5aad5a24
to address the nesting issue.
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