Add tests for run_path parameter

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: jariji

test/run/test_run_path.jl

@@ -0,0 +1,60 @@
+@testset "run_path separates execution and output directories" begin
+
+# Create a document that writes a marker file and reads a file from cwd
+doc_body = """
+```julia
+pwd()
+```
+
+```julia
+read("run_path_input.txt", String)
+```
+"""
+
+# Set up: doc in one dir, input file in another
+doc_dir = mktempdir()
+run_dir = mktempdir()
+out_dir = mktempdir()
+
+doc_path = joinpath(doc_dir, "test_run_path.jmd")
+write(doc_path, doc_body)
+write(joinpath(run_dir, "run_path_input.txt"), "hello from run_dir")
+
+@testset "run_path controls execution directory" begin
+    doc = run_doc(WeaveDoc(doc_path); out_path = out_dir, run_path = run_dir)
+    # pwd() during execution should be run_dir
+    @test occursin(run_dir, doc.chunks[1].output)
+    # reading a file relative to cwd should find run_dir's file
+    @test occursin("hello from run_dir", doc.chunks[2].output)
+    # output should go to out_dir
+    @test doc.out_dir == out_dir
+end
+
+@testset "run_path=:doc runs from document directory" begin
+    write(joinpath(doc_dir, "run_path_input.txt"), "hello from doc_dir")
+    doc = run_doc(WeaveDoc(doc_path); out_path = out_dir, run_path = :doc)
+    @test occursin(doc_dir, doc.chunks[1].output)
+    @test occursin("hello from doc_dir", doc.chunks[2].output)
+end
+
+@testset "run_path=nothing preserves default behavior" begin
+    write(joinpath(out_dir, "run_path_input.txt"), "hello from out_dir")
+    doc = run_doc(WeaveDoc(doc_path); out_path = out_dir, run_path = nothing)
+    # default: execution dir == output dir
+    @test occursin(out_dir, doc.chunks[1].output)
+    @test occursin("hello from out_dir", doc.chunks[2].output)
+end
+
+@testset "run_path via weave()" begin
+    write(joinpath(run_dir, "run_path_input.txt"), "hello from run_dir")
+    result = weave(doc_path; out_path = out_dir, run_path = run_dir)
+    try
+        body = read(result, String)
+        @test occursin(run_dir, body)
+        @test occursin("hello from run_dir", body)
+    finally
+        rm(result, force=true)
+    end
+end
+
+end # @testset

test/runtests.jl

@@ -47,6 +47,7 @@ end
         include("run/test_module.jl")
         include("run/test_meta.jl")
         include("run/test_error.jl")
+        include("run/test_run_path.jl")
     end
 
     @testset "render" begin