🚸UnitParser.Parse should throw AmbiguousUnitParseException before any UnitNotFoundException (#1484) #1494
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…en#1484) Fixes angularsen#1423 `UnitParser.Parse<LengthUnit>("MM")` fails due to matching both `Megameter` and `Millimeter` in case-insensitive matching, but matches neither of them in the case-sensitive fallback. It was confusing to get `UnitsNotFoundException` in this case, since case-insensitive usually works for most units. ### Changes - Handle this case and throw `AmbiguousUnitParseException` instead of `UnitNotFoundException` - Describe the case-insensitive units that matched - Fix existing test `Parse_WithMultipleCaseInsensitiveMatchesButNoExactMatches_ThrowsUnitNotFoundException` - Skip retrying with fallback culture if no specific `formatProvider` was given
lipchev
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Jan 4, 2025
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| [Fact] | ||
| public void Parse_LengthUnit_MM_ThrowsExceptionDescribingTheAmbiguity() | ||
| { | ||
| var ex = Assert.Throws<AmbiguousUnitParseException>(() => UnitsNetSetup.Default.UnitParser.Parse<LengthUnit>("MM")); | ||
| Assert.Equal("""Cannot parse "MM" since it matches multiple units: Megameter ("Mm"), Millimeter ("mm").""", ex.Message); | ||
| } |
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Notice the new message format, the other one seemed excessively long..
lipchev
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Jan 4, 2025
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What I said in #1484 about the recursive call requiring additional handling was wrong: I was under the persuasion that if there are multiple matches with the first culture, then we still want to try to disambiguate with the fallback culture, but that makes no sense..
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Fixes #1423 for
release-v6Carry over from #1484
UnitParser.Parse<LengthUnit>("MM")fails due to matching bothMegameterandMillimeterin case-insensitive matching, but matches neither of them in the case-sensitive fallback. It was confusing to getUnitsNotFoundExceptionin this case, since case-insensitive usually works for most units.Changes
AmbiguousUnitParseExceptioninstead ofUnitNotFoundExceptionParse_WithMultipleCaseInsensitiveMatchesButNoExactMatches_ThrowsUnitNotFoundExceptionformatProviderwas given