test_that("CMDist works on different DTMtypes", {
  ## base R matrix ##
  out.bse <- CMDist(
    dtm = dtm.bse,
    cw = cw,
    cv = NULL,
    wv = fake_word_vectors,
    missing = "stop"
  )

  expect_s3_class(out.bse, "data.frame")
  expect_type(out.bse[, 2], "double")
  expect_identical(out.bse$doc_id, rownames(dtm.bse))

  ## dgCMatrix matrix ##
  out.dgc <- CMDist(
    dtm = dtm.dgc,
    cw = cw,
    cv = NULL,
    wv = fake_word_vectors,
    missing = "stop"
  )

  expect_s3_class(out.dgc, "data.frame")
  expect_type(out.dgc[, 2], "double")
  expect_identical(out.dgc$doc_id, rownames(dtm.dgc))

  ## dfm//dgCMatrix matrix ##
  out.dfm <- CMDist(
    dtm = dtm.dfm,
    cw = cw,
    cv = NULL,
    wv = fake_word_vectors,
    missing = "stop"
  )

  expect_s3_class(out.dfm, "data.frame")
  expect_type(out.dfm[, 2], "double")
  expect_identical(out.dfm$doc_id, rownames(dtm.dfm))

  ## tm//simple_triplet_matrix matrix ##
  out.tm <- CMDist(
    dtm = dtm.tm,
    cw = cw,
    cv = NULL,
    wv = fake_word_vectors,
    missing = "stop"
  )

  expect_s3_class(out.tm, "data.frame")
  expect_type(out.tm[, 2], "double")
  expect_identical(out.tm$doc_id, rownames(dtm.tm))

  expect_identical(out.bse, out.dgc, out.dfm, out.tm)
})

test_that("CMDist, the same doc has identical outputs across
          different runs with scale=FALSE", {
  out.2 <- CMDist(
    dtm = dtm.dgc[1:2, ],
    cw = cw,
    cv = NULL,
    wv = fake_word_vectors,
    scale = FALSE,
    missing = "stop"
  )

  out.4 <- CMDist(
    dtm = dtm.dgc[1:4, ],
    cw = cw,
    cv = NULL,
    wv = fake_word_vectors,
    scale = FALSE,
    missing = "stop"
  )

  expect_identical(out.2[1, 2], out.4[1, 2])
  expect_identical(out.2[2, 2], out.4[2, 2])
})

test_that("CMDist, handles dtm's with zero words", {
  out <- CMDist(
    dtm = dtm.dgc[, 1:35],
    cw = cw,
    cv = sd.01,
    wv = fake_word_vectors,
    scale = FALSE,
    missing = "remove"
  )

  expect_identical(out[10, 2], 0)
  expect_identical(out[10, 3], 0)
})

test_that("CMDist works with multiple words/compound concepts", {
  ## two concept words ##
  out <- CMDist(
    dtm = dtm.dgc,
    cw = cw.2,
    cv = NULL,
    wv = fake_word_vectors,
    missing = "stop"
  )

  expect_s3_class(out, "data.frame")
  expect_type(out[, 2], "double")
  expect_type(out[, 3], "double")
  expect_identical(out$doc_id, rownames(dtm.dgc))
  expect_identical(colnames(out), c("doc_id", cw.2))

  ## compound concept ##
  out <- CMDist(
    dtm = dtm.dgc,
    cw = cw.3,
    cv = NULL,
    wv = fake_word_vectors,
    missing = "stop"
  )

  expect_s3_class(out, "data.frame")
  expect_type(out[, 2], "double")
  expect_type(out[, 3], "double")
  expect_type(out[, 4], "double")
  expect_identical(out$doc_id, rownames(dtm.dgc))
  expect_identical(colnames(out), c("doc_id", "choose", "decade", "the"))

  ## compound concept with duplicated first words ##
  out <- CMDist(
    dtm = dtm.dgc,
    cw = cw.4,
    cv = NULL,
    wv = fake_word_vectors,
    missing = "stop"
  )

  expect_s3_class(out, "data.frame")
  expect_type(out[, 2], "double")
  expect_type(out[, 3], "double")
  expect_type(out[, 4], "double")
  expect_identical(out$doc_id, rownames(dtm.dgc))
  expect_identical(colnames(out), c("doc_id", "choose", "decade", "decade_1"))

  ## compound concept with duplicated vector labels ##

  sem.dirs <- rbind(
    get_centroid(anchor.solo.c, fake_word_vectors),
    get_centroid(anchor.solo.c, fake_word_vectors)
  )

  out <- CMDist(
    dtm = dtm.dgc,
    cw = cw.4,
    cv = sem.dirs,
    wv = fake_word_vectors,
    missing = "stop"
  )

  expect_s3_class(out, "data.frame")
  expect_type(out[, 2], "double")
  expect_type(out[, 3], "double")
  expect_type(out[, 4], "double")
  expect_identical(out$doc_id, rownames(dtm.dgc))
  expect_identical(
    colnames(out),
    c(
      "doc_id", "choose", "decade", "decade_1",
      "choose_centroid", "choose_centroid_1"
    )
  )
})