CI: use julia-actions/install-juliaup instead (#298)

Author: WardBrian

.github/workflows/main.yaml

@@ -161,9 +161,9 @@ jobs:
           submodules: recursive
 
       - name: Set up Julia
-        uses: julia-actions/setup-julia@v2
+        uses: julia-actions/install-juliaup@v2
         with:
-          version: ${{ matrix.julia-version }}
+          channel: ${{ matrix.julia-version }}
 
       - name: Restore Stan
         uses: actions/cache@v4
@@ -182,17 +182,21 @@ jobs:
       - name: Check import
         run: |
           cd julia/
+          julia --version
           julia --project=. -e "using Pkg; Pkg.instantiate()"
           julia --project=. -e "using BridgeStan"
 
       - name: Run tests
         run: |
-          cd julia/
-          julia --project=. -t 2 -e "using Pkg; Pkg.test()"
-          julia --project=. example.jl
+          julia --project=julia/ --color=yes -t 2 -e "using Pkg; Pkg.test()"
         env:
           BRIDGESTAN: ${{ github.workspace }}
 
+      - name: Run example
+        run: |
+          cd julia/
+          julia --project=. example.jl
+
   Rlang:
     needs: [build]
     runs-on: ${{matrix.os}}

julia/test/model_tests.jl

@@ -314,6 +314,7 @@ end
 
     model = load_test_model("multi")
     nt = Threads.nthreads()
+    @test nt > 1
 
     R = 1000
     ld = Vector{Bool}(undef, R * 2)
@@ -567,6 +568,7 @@ end
 
     model = load_test_model("ode_sundials")
     nt = Threads.nthreads()
+    @test nt > 1
     seeds = rand(UInt32, nt)
 
     x = zeros(Float64, 0) # model is gq-only
@@ -689,7 +691,7 @@ end
     out = @capture_out f()
 
     lines = split(out, "\n")
-    @test lines[1] == "Hello from Julia"
-    @test lines[2] == "Hi from Stan!"
-    @test lines[3] == "theta = $theta"
+    @test strip(lines[1]) == "Hello from Julia"
+    @test strip(lines[2]) == "Hi from Stan!"
+    @test strip(lines[3]) == "theta = $theta"
 end