Add sublibrary test groups to CI

Run each sublibrary's test suite as a separate CI group:
- RaggedArrays: RecursiveArrayToolsRaggedArrays (430 tests)
- ArrayPartitionAnyAll: optimized any/all (30 tests)
- ShorthandConstructors: VA[...]/AP[...] syntax (7 tests)

Each group activates the sublibrary's own Project.toml environment,
dev's the parent package, and runs Pkg.test().

Co-Authored-By: Chris Rackauckas <accounts@chrisrackauckas.com>
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: ChrisRackauckas

.github/workflows/Tests.yml

@@ -28,6 +28,9 @@ jobs:
           - "pre"
         group:
           - "Core"
+          - "RaggedArrays"
+          - "ArrayPartitionAnyAll"
+          - "ShorthandConstructors"
           - "Downstream"
           - "nopre"
         exclude:

test/runtests.jl

@@ -53,26 +53,25 @@ end
         @time @safetestset "SymbolicIndexingInterface API test" include("symbolic_indexing_interface_test.jl")
     end
 
-    if GROUP == "Subpackages" || GROUP == "All"
-        # Test that loading RecursiveArrayToolsArrayPartitionAnyAll overrides any/all
-        Pkg.develop(
-            PackageSpec(
-                path = joinpath(dirname(@__DIR__), "lib", "RecursiveArrayToolsArrayPartitionAnyAll")
-            )
-        )
-        @time @safetestset "ArrayPartition AnyAll Subpackage" begin
-            using RecursiveArrayTools, RecursiveArrayToolsArrayPartitionAnyAll, Test
-            # Verify optimized methods are active
-            m_any = which(any, Tuple{Function, ArrayPartition})
-            m_all = which(all, Tuple{Function, ArrayPartition})
-            @test occursin("ArrayPartitionAnyAll", string(m_any.module))
-            @test occursin("ArrayPartitionAnyAll", string(m_all.module))
-            # Verify correctness
-            @test  any(isnan, ArrayPartition([NaN], [1.0]))
-            @test !any(isnan, ArrayPartition([1.0], [2.0]))
-            @test  all(isnan, ArrayPartition([NaN], [NaN]))
-            @test !all(isnan, ArrayPartition([NaN], [1.0]))
-        end
+    if GROUP == "RaggedArrays"
+        Pkg.activate(joinpath(dirname(@__DIR__), "lib", "RecursiveArrayToolsRaggedArrays"))
+        Pkg.develop(PackageSpec(path = dirname(@__DIR__)))
+        Pkg.instantiate()
+        Pkg.test()
+    end
+
+    if GROUP == "ArrayPartitionAnyAll"
+        Pkg.activate(joinpath(dirname(@__DIR__), "lib", "RecursiveArrayToolsArrayPartitionAnyAll"))
+        Pkg.develop(PackageSpec(path = dirname(@__DIR__)))
+        Pkg.instantiate()
+        Pkg.test()
+    end
+
+    if GROUP == "ShorthandConstructors"
+        Pkg.activate(joinpath(dirname(@__DIR__), "lib", "RecursiveArrayToolsShorthandConstructors"))
+        Pkg.develop(PackageSpec(path = dirname(@__DIR__)))
+        Pkg.instantiate()
+        Pkg.test()
     end
 
     if GROUP == "Downstream"