test_jvm_api.R

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context("JVM API")

sparkSession <- sparkR.session(enableHiveSupport = FALSE)

test_that("Create and call methods on object", {
  jarr <- newJObject("java.util.ArrayList")
  # Add an element to the array
  callJMethod(jarr, "add", 1L)
  # Check if get returns the same element
  expect_equal(callJMethod(jarr, "get", 0L), 1L)
})

test_that("Call static methods", {
  # Convert a boolean to a string
  strTrue <- callJStatic("java.lang.String", "valueOf", TRUE)
  expect_equal(strTrue, "true")
})

test_that("Manually garbage collect objects", {
  jarr <- newJObject("java.util.ArrayList")
  cleanup.jobj(jarr)
  # Using a jobj after GC should throw an error
  expect_error(print(jarr), "Error in invokeJava.*")
})

sparkR.session.stop()