Convert relpaths to abspaths prior to dir check, add tests

src/server.jl

@@ -98,11 +98,9 @@ function evaluate!(
 end
 
 function _check_output_dst(s::AbstractString)
+    s = abspath(s)
     dir = dirname(s)
-    if !isdir(dir)
-        _dir = dirname(joinpath(pwd(), s))
-        isdir(_dir) || throw(ArgumentError("directory does not exist: $(dir)"))
-    end
+    isdir(dir) || throw(ArgumentError("directory does not exist: $(dir)"))
     return nothing
 end
 _check_output_dst(::Any) = nothing

test/runtests.jl

@@ -811,4 +811,24 @@ end
             )
         end
     end
+
+    @testset "relative paths in `output`" begin
+        content = read(joinpath(@__DIR__, "examples/stdout.qmd"), String)
+        mktempdir() do dir
+            cd(dir) do
+                server = QuartoNotebookRunner.Server()
+                write("notebook.qmd", content)
+                ipynb = "notebook.ipynb"
+                QuartoNotebookRunner.run!(server, "notebook.qmd"; output = ipynb)
+
+                json = JSON3.read(ipynb)
+
+                cells = json.cells
+                cell = cells[8]
+                @test contains(cell.outputs[1].text, "\e[1mInfo: \e[22m\e[39minfo text")
+
+                close!(server)
+            end
+        end
+    end
 end