tests/testthat/test-motifs.R

In igraph: Network Analysis and Visualization

test_that("motif finding works", {
  set.seed(123)

  b <- sample_gnp(10000, 4 / 10000, directed = TRUE)

  mno <- count_motifs(b)

  mno0 <- count_motifs(b, cut.prob = c(1 / 3, 0, 0))
  mno1 <- count_motifs(b, cut.prob = c(0, 0, 1 / 3))
  mno2 <- count_motifs(b, cut.prob = c(0, 1 / 3, 0))
  expect_that(
    c(mno0 / mno, mno1 / mno, mno2 / mno),
    equals(c(
      0.654821903845065, 0.666289144345659,
      0.668393831285275
    ))
  )

  mno3 <- count_motifs(b, cut.prob = c(0, 1 / 3, 1 / 3))
  mno4 <- count_motifs(b, cut.prob = c(1 / 3, 0, 1 / 3))
  mno5 <- count_motifs(b, cut.prob = c(1 / 3, 1 / 3, 0))
  expect_that(
    c(mno3 / mno, mno4 / mno, mno5 / mno),
    equals(c(
      0.443959957465819, 0.441952797125797,
      0.446004870037941
    ))
  )

  ######################

  set.seed(123)
  b <- sample_gnp(10000, 4 / 10000, directed = TRUE)

  m <- motifs(b)

  m0 <- motifs(b, cut.prob = c(1 / 3, 0, 0))
  m1 <- motifs(b, cut.prob = c(0, 1 / 3, 0))
  m2 <- motifs(b, cut.prob = c(0, 0, 1 / 3))
  expect_that(m0 / m, equals(c(
    NA, NA, 0.653972107372707, NA,
    0.653993015279859, 0.612244897959184,
    0.657514670174019, 0.63013698630137, NaN,
    0.538461538461538, NaN,
    0.565217391304348, NaN, NaN, NaN, NaN
  )))
  expect_that(m1 / m, equals(c(
    NA, NA, 0.669562138856225, NA,
    0.66808158454082, 0.73469387755102,
    0.670819000404694, 0.657534246575342,
    NaN, 0.769230769230769, NaN,
    0.739130434782609, NaN, NaN, NaN, NaN
  )))
  expect_that(m2 / m, equals(c(
    NA, NA, 0.666451718949538, NA,
    0.665291458452201, 0.591836734693878,
    0.666683528935654, 0.671232876712329,
    NaN, 0.753846153846154, NaN,
    0.565217391304348, NaN, NaN, NaN, NaN
  )))

  m3 <- motifs(b, cut.prob = c(0, 1 / 3, 1 / 3))
  m4 <- motifs(b, cut.prob = c(1 / 3, 1 / 3, 0))
  m5 <- motifs(b, cut.prob = c(1 / 3, 1 / 3, 0))
  expect_that(m3 / m, equals(c(
    NA, NA, 0.445611905574732, NA,
    0.442789875290769, 0.448979591836735,
    0.444695973290166, 0.424657534246575,
    NaN, 0.369230769230769, NaN,
    0.608695652173913, NaN, NaN, NaN, NaN
  )))

  expect_that(m4 / m, equals(c(
    NA, NA, 0.439251981944392, NA,
    0.439284975327761, 0.73469387755102,
    0.445088021044112, 0.465753424657534,
    NaN, 0.630769230769231, NaN,
    0.565217391304348, NaN, NaN, NaN, NaN
  )))

  expect_that(m5 / m, equals(c(
    NA, NA, 0.439985332979302, NA,
    0.440288166730411, 0.346938775510204,
    0.44159753136382, 0.452054794520548, NaN,
    0.323076923076923, NaN,
    0.347826086956522, NaN, NaN, NaN, NaN
  )))
})