test: capture Windows path regression in kaleido

Author: cpsievert

tests/testthat/test-kaleido.R

@@ -0,0 +1,45 @@
+test_that("newKaleidoScope does not inline Windows temp paths into Python code", {
+  skip_if_not_installed("reticulate")
+  skip_if_not(suppressWarnings(reticulate::py_available(TRUE)))
+
+  win_path <- "C:\\users\\name\\AppData\\Local\\Temp\\Rtmp\\file.json"
+  py_calls <- character()
+  write_fig_args <- NULL
+
+  testthat::local_mocked_bindings(
+    plotly_build = function(...) {
+      list(x = list(data = list(), layout = list(), config = list()))
+    },
+    to_JSON = function(...) "{}",
+    plotlyMainBundlePath = function() "plotly.min.js",
+    .package = "plotly"
+  )
+
+  testthat::local_mocked_bindings(
+    tempfile = function(...) win_path,
+    writeLines = function(...) NULL,
+    .package = "base"
+  )
+
+  testthat::local_mocked_bindings(
+    py_run_string = function(code, ...) {
+      py_calls <<- c(py_calls, code)
+      py_obj <- get("py", envir = asNamespace("reticulate"))
+      py_obj$fig <- "fake-fig"
+      invisible(NULL)
+    },
+    .package = "reticulate"
+  )
+
+  kaleido <- list(write_fig_sync = function(fig, file, opts, kopts) {
+    write_fig_args <<- list(fig = fig, file = file, opts = opts, kopts = kopts)
+    invisible(NULL)
+  })
+
+  scope <- newKaleidoScope(kaleido)
+  scope$transform(list(), "figure.png")
+
+  expect_identical(py_calls, "import json; fig = json.load(open(tmp_json_path))")
+  expect_identical(write_fig_args$fig, "fake-fig")
+  expect_identical(write_fig_args$file, "figure.png")
+})