Nothing

```
library(DoE.multi.response)
context("Helper Functions")
#run test with "Ctrl/Cmd + Shift + T" or "devtools::test()"
x<-matrix(c(1,1,1,0,0,
0,1,1,1,0,
1,0,1,0,1,
1,0,0,1,0), nrow = 4,byrow = TRUE)
test_that("checkuf returns a logical indicator of wheather an existing unique facor can be used",{
expect_true(checkuf(x,c(0,0,1,0)))
expect_true(checkuf(x,c(0,0,1,1)))
expect_true(checkuf(x,c(0,0,0,1)))
expect_true(checkuf(x,c(0,1,0,0)))
expect_true(checkuf(x[,1:4],x[,5]))
expect_false(checkuf(x[,1],x[,2]))
expect_false(checkuf(x[,1:2],x[,3]))
expect_false(checkuf(x[,1:3],x[,4]))
})
test_that("minwhichuf returns minimum available existing unique factors that can been assigned", {
expect_equal(minwhichuf(x,c(0,0,1,0)),2)
expect_equal(minwhichuf(x,c(0,0,1,1)),2)
expect_equal(minwhichuf(x,c(0,0,0,1)),2)
expect_equal(minwhichuf(x,c(1,0,1,0)),4)
expect_equal(minwhichuf(x,c(0,1,0,0)),1)
expect_equal(minwhichuf(x[,2],c(0,0,1,0)),1)
expect_equal(minwhichuf(x[,1:4],x[,5]),2)
})
x5to2<-matrix(c(1,1,1,0,
0,1,1,1,
1,1,1,0,
1,0,0,1), nrow = 4,byrow = TRUE)
x5to4<-matrix(c(1,1,1,0,
0,1,1,1,
1,0,1,1,
1,0,0,1), nrow = 4,byrow = TRUE)
test_that("addtouf adds a factor to a unique factor", {
expect_equal(addtouf(x[,1:4],x[,5],2),x5to2)
expect_equal(addtouf(x[,1:4],x[,5],4),x5to4)
expect_equal(addtouf(c(1,0,0,1),c(0,1,0,0),1),c(1,1,0,1))
expect_equal(addtouf(c(0,0,1,0),c(1,0,0,0),1),c(1,0,1,0))
})
```

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