# To run tests for one dbms and one cdmVersion use the variables below
# dbms <- "postgresql"; cdmVersion <- "5.4"

# testDatabases <- c("oracle", "postgresql", "sql server", "redshift")
testDatabases <- c("postgresql", "redshift")

test_that("getConnectionDetails works", {
  for(dbms in testDatabases) {
    expect_s3_class(getConnectionDetails(dbms), "connectionDetails")
  }
})

test_that("getSchema works", {
  for(dbms in testDatabases) {
    expect_type(getSchema(dbms), "character")
  }
})

for(dbms in testDatabases) {
  connectionDetails <- getConnectionDetails(dbms)
  cdmDatabaseSchema <- getSchema(dbms)

  test_that(paste("Can connect to", dbms), {
    expect_error({con <- connect(connectionDetails)}, NA)
    disconnect(con)
  })


  # for(cdmVersion in listSupportedVersions()) {
  #   test_that(paste("DDL", cdmVersion, "runs on", dbms), {
  #     dropAllTablesFromSchema(connectionDetails, cdmDatabaseSchema)
  #     tables <- listTablesInSchema(connectionDetails, cdmDatabaseSchema)
  #     expect_equal(tables, character(0))
  #
  #     executeDdl(connectionDetails,
  #                cdmVersion = cdmVersion,
  #                cdmDatabaseSchema = cdmDatabaseSchema,
  #                executeDdl = TRUE,
  #                executePrimaryKey = TRUE,
  #                executeForeignKey = FALSE)
  #
  #     tables <- listTablesInSchema(connectionDetails, cdmDatabaseSchema)
  #     cdmTableCsvLoc <- system.file(file.path("csv", paste0("OMOP_CDMv", cdmVersion, "_Table_Level.csv")), package = "CommonDataModel", mustWork = TRUE)
  #     tableSpecs <- read.csv(cdmTableCsvLoc, stringsAsFactors = FALSE)$cdmTableName
  #
  #     # check that the tables in the database match the tables in the specification
  #     expect_equal(sort(tolower(tables)), sort(tolower(tableSpecs)))
  #     dropAllTablesFromSchema(connectionDetails, cdmDatabaseSchema)
  #   })
  # }
}