coverage: add missing tests for Sources.MockClass.cs

[vbreuss]

This pull request adds tests for new language features and improved error handling for unsupported method signatures.

Support for static abstract members and explicit implementations:

• Added tests to ensure that when interfaces declare static abstract methods or properties with colliding names in base and derived interfaces, the generated code emits explicit static implementations with the static keyword preserved.
• Added a test to verify that static abstract methods with parameters correctly append arguments to the fast buffer, ensuring proper interaction recording.
• Added a test to confirm that when a concrete base class is combined with an interface declaring static abstract members, the generated constructor primes the MockRegistryProvider so that virtual calls during base-class construction can resolve the registry.

Improved handling and validation for ref struct methods:

• Added tests to ensure that methods returning a non-span ref struct or using out/ref ref struct parameters throw NotSupportedException and skip setup surface generation, preventing unsupported ref struct signatures from being used in the setup pipeline.

Source generator code and overloads:

• Refactored the generator code to require non-null constructor lists for overload generation, simplifying the logic in AppendTypedCreateMockOverloads.
• Removed an unnecessary constructor overload and related code for cases where no constructors are present, streamlining the generated code.

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
100.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud

[github-actions]

Test Results

    21 files  ± 0      21 suites  ±0   11m 10s ⏱️ + 1m 37s
 3 866 tests + 6   3 864 ✅ + 6  2 💤 ±0  0 ❌ ±0 
25 112 runs  +18  25 108 ✅ +18  4 💤 ±0  0 ❌ ±0 

Results for commit 49f55e0. ± Comparison against base commit c12680a.

[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 10.0.203

[Host] : .NET 10.0.7 (10.0.7, 10.0.726.21808), X64 RyuJIT x86-64-v3
Job=InProcess  Toolchain=InProcessEmitToolchain  IterationCount=15

LaunchCount=1  WarmupCount=10

Method	Mean	Error	StdDev	Ratio	RatioSD	Gen0	Gen1	Allocated	Alloc Ratio
Event_Mockolate	340.5 ns	4.40 ns	3.90 ns	1.00	0.02	0.1254	0.0005	2.05 KB	1.00
Event_Moq	16,223.8 ns	180.62 ns	150.83 ns	47.66	0.68	0.7324	-	12.73 KB	6.19
Event_NSubstitute	5,641.9 ns	74.77 ns	69.94 ns	16.57	0.27	0.5493	0.0076	9.05 KB	4.40
Event_FakeItEasy	214,029.4 ns	2,340.60 ns	2,074.88 ns	628.70	9.08	0.7324	0.4883	15.39 KB	7.49
Event_Imposter	1,462.7 ns	36.78 ns	34.41 ns	4.30	0.11	0.5379	0.0153	8.8 KB	4.29
Event_TUnitMocks	188.0 ns	3.19 ns	2.82 ns	0.55	0.01	0.0837	0.0002	1.37 KB	0.67

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 10.0.203

[Host] : .NET 10.0.7 (10.0.7, 10.0.726.21808), X64 RyuJIT x86-64-v3
Job=InProcess  Toolchain=InProcessEmitToolchain  IterationCount=15

LaunchCount=1  WarmupCount=10

Method	N	Mean	Error	StdDev	Ratio	RatioSD	Gen0	Gen1	Allocated	Alloc Ratio
Indexer_Mockolate	1	1.001 μs	0.0207 μs	0.0193 μs	1.00	0.03	0.2460	0.0019	4.03 KB	1.00
Indexer_Moq	1	218.268 μs	1.3739 μs	1.2179 μs	218.02	4.32	0.9766	0.4883	20.45 KB	5.07
Indexer_NSubstitute	1	9.390 μs	0.1402 μs	0.1312 μs	9.38	0.22	0.7782	-	12.78 KB	3.17
Indexer_FakeItEasy	1	12.167 μs	0.2209 μs	0.2066 μs	12.15	0.31	0.8392	0.0305	13.88 KB	3.44
Indexer_Imposter	1	1.022 μs	0.0366 μs	0.0342 μs	1.02	0.04	0.3147	0.0038	5.16 KB	1.28
Indexer_Mockolate	10	2.552 μs	0.0543 μs	0.0508 μs	1.00	0.03	0.3090	-	5.09 KB	1.00
Indexer_Moq	10	228.666 μs	1.4741 μs	1.3789 μs	89.65	1.80	1.7090	1.4648	29.97 KB	5.89
Indexer_NSubstitute	10	22.845 μs	0.1585 μs	0.1482 μs	8.96	0.18	1.5564	0.0305	25.58 KB	5.03
Indexer_FakeItEasy	10	25.762 μs	0.2580 μs	0.2413 μs	10.10	0.21	2.1667	0.0610	35.47 KB	6.97
Indexer_Imposter	10	2.321 μs	0.0458 μs	0.0429 μs	0.91	0.02	0.4845	0.0076	7.97 KB	1.57

Details

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

AMD EPYC 9V74 3.69GHz, 1 CPU, 4 logical and 2 physical cores

.NET SDK 10.0.203

[Host] : .NET 10.0.7 (10.0.7, 10.0.726.21808), X64 RyuJIT x86-64-v4
Job=InProcess  Toolchain=InProcessEmitToolchain  IterationCount=15

LaunchCount=1  WarmupCount=10

Method	N	Mean	Error	StdDev	Ratio	RatioSD	Gen0	Gen1	Allocated	Alloc Ratio
Method_Mockolate	1	365.1 ns	9.78 ns	8.67 ns	1.00	0.03	0.1416	0.0010	2.32 KB	1.00
Method_Moq	1	103,856.7 ns	980.31 ns	869.02 ns	284.63	6.85	0.7324	0.4883	14.59 KB	6.29
Method_NSubstitute	1	4,364.3 ns	26.09 ns	24.40 ns	11.96	0.28	0.5569	0.0076	9.12 KB	3.93
Method_FakeItEasy	1	4,636.1 ns	90.54 ns	84.70 ns	12.71	0.37	0.4959	-	8.11 KB	3.50
Method_Imposter	1	462.1 ns	19.65 ns	17.42 ns	1.27	0.05	0.2470	0.0033	4.04 KB	1.74
Method_TUnitMocks	1	552.9 ns	7.52 ns	6.67 ns	1.52	0.04	0.1774	0.0010	2.9 KB	1.25
Method_Mockolate	10	593.8 ns	18.26 ns	17.08 ns	1.00	0.04	0.1545	0.0010	2.53 KB	1.00
Method_Moq	10	105,376.4 ns	1,114.11 ns	930.33 ns	177.60	5.14	1.0986	0.9766	18.48 KB	7.30
Method_NSubstitute	10	6,242.2 ns	91.35 ns	80.98 ns	10.52	0.32	0.7324	0.0153	12.07 KB	4.77
Method_FakeItEasy	10	7,105.4 ns	189.54 ns	177.30 ns	11.98	0.44	0.9766	0.0153	16.05 KB	6.34
Method_Imposter	10	970.5 ns	33.97 ns	31.78 ns	1.64	0.07	0.3376	0.0057	5.52 KB	2.18
Method_TUnitMocks	10	1,496.0 ns	29.70 ns	27.79 ns	2.52	0.08	0.2747	0.0019	4.49 KB	1.77

Details

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

AMD EPYC 9V74 2.87GHz, 1 CPU, 4 logical and 2 physical cores

.NET SDK 10.0.203

[Host] : .NET 10.0.7 (10.0.7, 10.0.726.21808), X64 RyuJIT x86-64-v3
Job=InProcess  Toolchain=InProcessEmitToolchain  IterationCount=15

LaunchCount=1  WarmupCount=10

Method	N	Mean	Error	StdDev	Ratio	RatioSD	Gen0	Gen1	Allocated	Alloc Ratio
Property_Mockolate	1	557.2 ns	7.95 ns	7.43 ns	1.00	0.02	0.1574	0.0010	2.58 KB	1.00
Property_Moq	1	10,581.9 ns	55.36 ns	49.08 ns	18.99	0.26	0.6104	-	10.53 KB	4.09
Property_NSubstitute	1	7,010.3 ns	124.23 ns	116.20 ns	12.58	0.26	0.6943	0.0076	11.45 KB	4.44
Property_FakeItEasy	1	7,296.9 ns	161.24 ns	150.82 ns	13.10	0.31	0.6866	-	11.24 KB	4.36
Property_Imposter	1	432.4 ns	4.46 ns	4.17 ns	0.78	0.01	0.1912	0.0019	3.13 KB	1.21
Property_TUnitMocks	1	741.2 ns	6.71 ns	6.28 ns	1.33	0.02	0.1526	0.0010	2.51 KB	0.97
Property_Mockolate	10	1,029.1 ns	7.00 ns	6.55 ns	1.00	0.01	0.1869	-	3.07 KB	1.00
Property_Moq	10	16,530.8 ns	157.61 ns	147.43 ns	16.06	0.17	1.0986	-	18.42 KB	6.00
Property_NSubstitute	10	15,525.0 ns	91.64 ns	81.24 ns	15.09	0.12	1.2817	0.0305	21.08 KB	6.87
Property_FakeItEasy	10	17,274.6 ns	285.06 ns	266.65 ns	16.79	0.27	1.8616	-	30.81 KB	10.03
Property_Imposter	10	1,055.2 ns	10.00 ns	8.86 ns	1.03	0.01	0.2842	0.0019	4.67 KB	1.52
Property_TUnitMocks	10	2,246.3 ns	12.25 ns	10.23 ns	2.18	0.02	0.2823	-	4.66 KB	1.52

Details

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

Intel Xeon Platinum 8370C CPU 2.80GHz (Max: 2.79GHz), 1 CPU, 4 logical and 2 physical cores

.NET SDK 10.0.203

[Host] : .NET 10.0.7 (10.0.7, 10.0.726.21808), X64 RyuJIT x86-64-v4
Job=InProcess  Toolchain=InProcessEmitToolchain  IterationCount=15

LaunchCount=1  WarmupCount=10

Method	Mean	Error	StdDev	Ratio	RatioSD	Gen0	Gen1	Allocated	Alloc Ratio
Callback_Mockolate	469.8 ns	6.96 ns	6.51 ns	1.00	0.02	0.0796	0.0005	1.96 KB	1.00
Callback_Moq	71,112.4 ns	544.95 ns	509.75 ns	151.40	2.31	0.2441	-	8.88 KB	4.53
Callback_NSubstitute	4,314.2 ns	14.53 ns	13.59 ns	9.18	0.13	0.3128	0.0076	7.74 KB	3.95
Callback_FakeItEasy	4,755.3 ns	15.80 ns	14.78 ns	10.12	0.14	0.2747	-	6.8 KB	3.47
Callback_Imposter	461.9 ns	9.96 ns	9.31 ns	0.98	0.02	0.0968	0.0005	2.38 KB	1.22
Callback_TUnitMocks	724.9 ns	10.10 ns	9.45 ns	1.54	0.03	0.1068	0.0010	2.63 KB	1.34

[github-actions]

This is addressed in release v3.0.0.