Nothing
test_that("test str equality", {
expect_true(is_equal_str("", ""))
expect_true(is_equal_str("asfw", "asfw"))
expect_true(is_equal_str("asfw", "asfw"))
expect_false(is_equal_str("asfwd", "asfw"))
expect_false(is_equal_str("", "-1"))
expect_false(is_equal_str("asfw", "atfw"))
})
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