tests/testthat/test_word_imp.R

In MAnalytics/opitools: Analyzing the Opinions in a Big Text Document

context("Testing word_imp.R function")

#create new fake text document

#small doc
set.seed(1000)
doc1 <- data.frame(text=sample(c("I love research because it is good!",
               "I do not like research, it is time-consuming",
               "I have no opinion on it"), size=7,
               replace = TRUE, prob = c(0.5, 0.3, 0.2)))

#append one more column
doc1_ <- data.frame(doc1, ID=seq.int(nrow(doc1)))

#large doc
set.seed(1000)
doc2 <- data.frame(text=sample(c("I love research because it is good!",
             "I do not like research, it is time-consuming",
             "I have no opinion on it"), size=50,
              replace = TRUE, prob = c(0.5, 0.3, 0.2)))

#append one more column
doc2_ <- data.frame(doc2, ID=seq.int(nrow(doc2)))


#checking that error msg outputs are correct
test_that("print out correct error msgs", {

  expect_error(word_imp(doc1_,
             prints_text(paste("Length of document is too small!!",
             "The minimum allowable length is 20!",
             "Process terminated!!", sep=" "))))
})

#run analysis
output1 <- word_imp(doc2_)

test_that('check that output is complete', {
  #check completeness of result..
  expect_equal(length(output1), 3)
  expect_equal(length(output1$metric), 1)
  expect_equal(ncol(output1$table), 2)
})

test_that('output type are correct', {
  expect_is(output1, 'list')
  expect_is(output1$table, 'data.frame')

})