```
# Description:
# Test the blockify function.
context("blockify")
test_that("blockify handles empty blocks", {
expression = quote({})
result = blockify(expression, "for")
expect_equal(length(result), 0)
expect_is(result, "list")
})
test_that("blockify correctly makes blocks", {
expression = quote({
if (x < 3) {
x = 3
}
a = 6
b = 7
for (i in 1:10) {
a = a + b
}
z = 10
})
result = blockify(expression, "if")
expect_equal(length(result), 2)
expect_equal(vapply(result, class, ""), c("if", "{"))
})
```

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