tests/testthat/test-adbcpostgres-package.R

In adbcpostgresql: 'Arrow' Database Connectivity ('ADBC') 'PostgreSQL' Driver

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test_that("adbcpostgresql() works", {
  expect_s3_class(adbcpostgresql(), "adbc_driver")
})

test_that("default options can open a database and execute a query", {
  test_db_uri <- Sys.getenv("ADBC_POSTGRESQL_TEST_URI", "")
  skip_if(identical(test_db_uri, ""))

  db <- adbcdrivermanager::adbc_database_init(
    adbcpostgresql(),
    uri = test_db_uri
  )
  expect_s3_class(db, "adbcpostgresql_database")

  con <- adbcdrivermanager::adbc_connection_init(db)
  expect_s3_class(con, "adbcpostgresql_connection")

  stmt <- adbcdrivermanager::adbc_statement_init(con)
  expect_s3_class(stmt, "adbcpostgresql_statement")

  # Use BIGINT to make sure that endian swapping on Windows works
  adbcdrivermanager::adbc_statement_set_sql_query(
    stmt,
    "CREATE TABLE crossfit (exercise TEXT, difficulty_level BIGINT);"
  )
  adbcdrivermanager::adbc_statement_execute_query(stmt)
  adbcdrivermanager::adbc_statement_release(stmt)

  # If we get this far, remove the table and disconnect when the test is done
  on.exit({
    stmt <- adbcdrivermanager::adbc_statement_init(con)
    adbcdrivermanager::adbc_statement_set_sql_query(
      stmt,
      "DROP TABLE IF EXISTS crossfit;"
    )
    adbcdrivermanager::adbc_statement_execute_query(stmt)
    adbcdrivermanager::adbc_statement_release(stmt)

    adbcdrivermanager::adbc_connection_release(con)
    adbcdrivermanager::adbc_database_release(db)
  })

  stmt <- adbcdrivermanager::adbc_statement_init(con)
  adbcdrivermanager::adbc_statement_set_sql_query(
    stmt,
    "INSERT INTO crossfit values
      ('Push Ups', 3),
      ('Pull Ups', 5),
      ('Push Jerk', 7),
      ('Bar Muscle Up', 10);"
  )
  adbcdrivermanager::adbc_statement_execute_query(stmt)
  adbcdrivermanager::adbc_statement_release(stmt)

  stmt <- adbcdrivermanager::adbc_statement_init(con)
  adbcdrivermanager::adbc_statement_set_sql_query(
    stmt,
    "SELECT * from crossfit ORDER BY difficulty_level"
  )

  stream <- nanoarrow::nanoarrow_allocate_array_stream()
  adbcdrivermanager::adbc_statement_execute_query(stmt, stream)
  expect_identical(
    as.data.frame(stream),
    data.frame(
      exercise = c("Push Ups", "Pull Ups", "Push Jerk", "Bar Muscle Up"),
      difficulty_level = c(3, 5, 7, 10),
      stringsAsFactors = FALSE
    )
  )

  adbcdrivermanager::adbc_statement_release(stmt)
})