```
library(testthat)
library(Rssa)
test_that("Circular Toeplitz SSA works correct for sines with finite circular rank", {
N <- 640
ii <- 3 * 2*pi * (1:N) / N
Ls <- c(3, 10, 17, 50, 371)
F <- sin(ii)
for (L in Ls) {
for (svd.method in c("eigen", "svd", "nutrlan", "propack")) {
if (identical(svd.method, "nutrlan") && L < 10)
svd.method <- "propack"
ss <- ssa(F, L = L, circular = TRUE, kind = "toeplitz-ssa",
svd.method = svd.method,
neig = 3)
expect_true(sum(ss$lambda[-(1:2)]) < .Machine$double.eps^.25)
expect_equal(reconstruct(ss, groups = list(1:2))$F1, F)
}
}
})
test_that("Lcor computation works correctly for circular case", {
Ls <- c(3, 10, 17, 50, 371, 500, 1000)
Ns <- c(1005, 1500, 2000, 5000)
set.seed(1)
for (N in Ns) {
for (L in Ls) {
F <- rcauchy(N)
C.exact <- convolve(F, F, conj = TRUE)[1:L] / N
C <- Lcor(F, L = L, circular = TRUE)
expect_equal(C, C.exact,
info = sprintf("L = %d, N = %d", L, N))
}
}
})
```

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