```
context("Sparse")
test_that("Calibrating a sparse diagonal matrix against a vector", {
N <- 5
X_dense <- diag(N)
d <- rep(1, N)
totals <- seq_len(N)
for (sparse in c(TRUE, FALSE)) {
X <- Matrix::Matrix(X_dense, sparse = sparse)
for (method in eval(formals(dss)$method)) {
g <- dss(X, d, totals, method = method)
expect_equal(g, totals, info = method, tolerance = 1e-6)
expect_null(attr(g, "success"))
expect_equal(length(g), N)
expect_is(g, "numeric")
}
}
})
```

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