Fix Issue stan-dev#765

Author: katrinabrock

R/model.R

@@ -2399,7 +2399,7 @@ model_compile_info <- function(exe_file) {
           if (!is.na(as.logical(val))) {
             val <- as.logical(val)
           }
-          info[[toupper(key_val[1])]] <- val
+          info[[tolower(key_val[1])]] <- val
         }
       }
       info[["STAN_VERSION"]] <- paste0(info[["STAN_VERSION_MAJOR"]], ".", info[["STAN_VERSION_MINOR"]], ".", info[["STAN_VERSION_PATCH"]])

tests/testthat/test-example.R

@@ -1,7 +1,7 @@
 context("cmdstanr_example")
 
 test_that("cmdstanr_example works", {
-  fit_mcmc <- cmdstanr_example("logistic", chains = 2)
+  fit_mcmc <- cmdstanr_example("logistic", chains = 2, force_recompile = TRUE)
   checkmate::expect_r6(fit_mcmc, "CmdStanMCMC")
   expect_equal(fit_mcmc$num_chains(), 2)
 

tests/testthat/test-model-compile.R

@@ -496,15 +496,15 @@ test_that("cpp_options work with settings in make/local", {
 
   rebuild_cmdstan()
   mod <- cmdstan_model(stan_file = stan_program)
-  expect_null(mod$cpp_options()$STAN_THREADS)
+  expect_null(mod$cpp_options()$stan_threads)
 
   file.remove(mod$exe_file())
 
   cmdstan_make_local(cpp_options = list(stan_threads = TRUE), append = TRUE)
 
   file <- file.path(cmdstan_path(), "examples", "bernoulli", "bernoulli.stan")
   mod <- cmdstan_model(file)
-  expect_true(mod$cpp_options()$STAN_THREADS)
+  expect_true(mod$cpp_options()$stan_threads)
 
   file.remove(mod$exe_file())
 
@@ -789,6 +789,8 @@ test_that("overwrite_file works with format()", {
   }
   "
   stan_file_tmp <- write_stan_file(code)
+  on.exit(file.remove(stan_file_tmp))
+
   mod_1 <- cmdstan_model(stan_file_tmp, compile = FALSE)
   expect_false(
     any(