Nothing

```
context("utility functions")
library(testthat)
library(spectralGraphTopology)
test_that("consistency of blockDiag function", {
N1 <- sample(1:10, 1)
N2 <- sample(1:10, 1)
L1 <- matrix(-1, N1, N1)
L2 <- matrix(2, N2, N2)
L <- rbind(cbind(L1, matrix(0, N1, N2)),
cbind(matrix(0, N2, N1), L2))
expect_true(all(L == block_diag(L1, L2)))
})
test_that("upper_view_vec works", {
a <- runif(1)
M <- a * matrix(c(6, -1, -2, -3,
-1, 10, -4, -5,
-2, -4, 12, -6,
-3, -5, -6, 14))
v <- upper_view_vec(M)
expect_true(all(v == - a * c(1:6)))
})
```

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