feat: add nullability filters and assertions for events

[vbreuss]

Add a WhichAreNullable filter and IsNullable / AreNullable assertions (plus negated variants) for EventInfo, matching what already exists for fields and properties.

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• Fixes Nullability filters/assertions for events #337

[github-actions]

Test Results

    13 files  ±  0      13 suites  ±0   11m 25s ⏱️ + 2m 28s
 6 813 tests + 54   6 810 ✅ + 54   3 💤 ±0  0 ❌ ±0 
40 723 runs  +324  40 710 ✅ +324  13 💤 ±0  0 ❌ ±0 

Results for commit 7a79109. ± Comparison against base commit 475b693.

This pull request removes 2 and adds 56 tests. Note that renamed tests count towards both.

aweXpect.Reflection.Internal.Tests.Helpers.NullabilityHelpersTests ‑ GetNotNullableMembers_ShouldReturnNonNullableFieldsAndProperties
aweXpect.Reflection.Internal.Tests.Helpers.NullabilityHelpersTests ‑ GetNullableMembers_ShouldReturnNullableFieldsAndProperties

aweXpect.Reflection.Internal.Tests.Helpers.NullabilityHelpersTests ‑ GetNotNullableMembers_ShouldReturnNonNullableFieldsPropertiesAndEvents
aweXpect.Reflection.Internal.Tests.Helpers.NullabilityHelpersTests ‑ GetNullableMembers_ShouldReturnNullableFieldsPropertiesAndEvents
aweXpect.Reflection.Internal.Tests.Helpers.NullabilityHelpersTests ‑ IsNullable_ShouldEvaluateEventNullability(eventName: "NonNullableEvent", expectNullable: False)
aweXpect.Reflection.Internal.Tests.Helpers.NullabilityHelpersTests ‑ IsNullable_ShouldEvaluateEventNullability(eventName: "NonNullableGenericEvent", expectNullable: False)
aweXpect.Reflection.Internal.Tests.Helpers.NullabilityHelpersTests ‑ IsNullable_ShouldEvaluateEventNullability(eventName: "NullableEvent", expectNullable: True)
aweXpect.Reflection.Internal.Tests.Helpers.NullabilityHelpersTests ‑ IsNullable_ShouldEvaluateEventNullability(eventName: "NullableGenericEvent", expectNullable: True)
aweXpect.Reflection.Internal.Tests.Helpers.NullabilityHelpersTests ‑ IsNullable_WhenEventIsOblivious_ShouldReturnFalse
aweXpect.Reflection.Internal.Tests.Helpers.NullabilityHelpersTests ‑ IsNullable_WithNonNullableEventInConstructedGenericType_ShouldReturnFalse
aweXpect.Reflection.Internal.Tests.Helpers.NullabilityHelpersTests ‑ IsNullable_WithNullEventInfo_ShouldReturnFalse
aweXpect.Reflection.Tests.Filters.EventFilters+WhichAreNotNullable+Tests ‑ ShouldAllowFilteringForNonNullableEvents
…

♻️ This comment has been updated with latest results.

[github-actions]

🚀 Benchmark Results

Details

BenchmarkDotNet v0.15.8, Linux Ubuntu 24.04.4 LTS (Noble Numbat)

AMD EPYC 7763 2.45GHz, 1 CPU, 4 logical and 2 physical cores

.NET SDK 10.0.300

[Host]     : .NET 10.0.8 (10.0.8, 10.0.826.23019), X64 RyuJIT x86-64-v3

DefaultJob : .NET 10.0.8 (10.0.8, 10.0.826.23019), X64 RyuJIT x86-64-v3

Method	Mean	Error	StdDev	Gen0	Allocated
TypeIsNotStatic_aweXpect	231.9 ns	1.09 ns	0.85 ns	0.0386	648 B

[github-actions]

👽 Mutation Results

aweXpect.Reflection

Details

File	Score	Killed	Survived	Timeout	No Coverage	Ignored	Compile Errors	Total Detected	Total Undetected	Total Mutants
Filters/EventFilters.WhichAreNullable.cs	100.00%	3	0	0	0	0	0	3	0	3
Filters/TypeFilters.WhichOnlyHaveNullableMembers.cs	100.00%	4	0	0	0	0	0	4	0	4
Helpers/NullabilityHelpers.cs	73.08%	57	7	0	14	30	34	57	21	142
ThatEvent.IsNullable.cs	100.00%	10	0	0	0	3	6	10	0	19
ThatEvents.AreNullable.cs	100.00%	20	0	0	0	4	12	20	0	36
ThatType.OnlyHasNonNullableMembers.cs	88.24%	15	2	0	0	3	6	15	2	26
ThatType.OnlyHasNullableMembers.cs	88.24%	15	2	0	0	3	6	15	2	26
ThatTypes.OnlyHaveNonNullableMembers.cs	92.86%	13	1	0	0	3	4	13	1	21
ThatTypes.OnlyHaveNullableMembers.cs	92.86%	13	1	0	0	3	4	13	1	21

The final mutation score is 84.75%

Coverage Thresholds: high:80 low:60 break:0

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
2 Accepted issues

Measures
0 Security Hotspots
100.0% Coverage on New Code
5.0% Duplication on New Code

See analysis details on SonarQube Cloud

[github-actions]

This is addressed in release v2.0.0.