```
context("runs test")
test_that("output from runs test matches the expected result", {
reg <- lm(mpg ~ disp, data = mtcars)
resid <- tibble::tibble(residual = residuals(reg))
k <- infer_runs_test(resid, residual)
expect_equal(k$n, 32)
expect_equal(round(k$threshold, 3), -0.963)
expect_equal(k$n_above, 16)
expect_equal(k$n_below, 16)
expect_equal(k$mean, 17)
expect_equal(round(k$var, 3), 7.742)
expect_equal(k$n_runs, 11)
expect_equal(round(k$z, 3), -2.156)
expect_equal(round(k$p, 3), 0.031)
})
test_that("output from runs test matches the expected result", {
reg <- lm(mpg ~ disp, data = mtcars)
resid <- tibble::tibble(residual = residuals(reg))
k <- infer_runs_test(resid, residual, drop = TRUE)
expect_equal(k$n, 32)
expect_equal(round(k$threshold, 3), -0.963)
expect_equal(k$n_above, 16)
expect_equal(k$n_below, 16)
expect_equal(k$mean, 17)
expect_equal(round(k$var, 3), 7.742)
expect_equal(k$n_runs, 11)
expect_equal(round(k$z, 3), -2.156)
expect_equal(round(k$p, 3), 0.031)
})
test_that("output from runs test matches the expected result", {
reg <- lm(mpg ~ disp, data = mtcars)
resid <- tibble::tibble(residual = residuals(reg))
k <- infer_runs_test(resid, residual, split = TRUE)
expect_equal(k$n, 32)
expect_equal(round(k$threshold, 3), -0.963)
expect_equal(k$n_above, 16)
expect_equal(k$n_below, 16)
expect_equal(k$mean, 17)
expect_equal(round(k$var, 3), 7.742)
expect_equal(k$n_runs, 11)
expect_equal(round(k$z, 3), -2.156)
expect_equal(round(k$p, 3), 0.031)
})
test_that("output from runs test matches the expected result", {
reg <- lm(mpg ~ disp, data = mtcars)
resid <- tibble::tibble(residual = residuals(reg))
k <- infer_runs_test(resid, residual, mean = TRUE)
expect_equal(k$n, 32)
expect_equal(k$threshold, -1.127570e-16)
expect_equal(k$n_above, 13)
expect_equal(k$n_below, 19)
expect_equal(k$mean, 1.643750e+01)
expect_equal(round(k$var, 2), 7.19)
expect_equal(k$n_runs, 11)
expect_equal(round(k$z, 2), -2.03)
expect_equal(k$p, 4.257089e-02)
})
test_that("output from runs test matches the expected result", {
reg <- lm(mpg ~ disp, data = mtcars)
resid <- tibble::tibble(residual = residuals(reg))
k <- infer_runs_test(resid, residual, threshold = 0)
expect_equal(k$n, 32)
expect_equal(round(k$threshold, 3), 0)
expect_equal(k$n_above, 13)
expect_equal(k$n_below, 19)
expect_equal(k$mean, 16.4375)
expect_equal(round(k$var, 3), 7.19)
expect_equal(k$n_runs, 11)
expect_equal(round(k$z, 3), -2.028)
expect_equal(round(k$p, 3), 0.043)
})
test_that("output from runs test is as expected", {
x <- cat("Runs Test
Total Cases: 32
Test Value : -0.9630856
Cases < Test Value: 16
Cases > Test Value: 16
Number of Runs: 11
Expected Runs: 17
Variance (Runs): 7.741935
z Statistic: -2.156386
p-value: 0.03105355")
reg <- lm(mpg ~ disp, data = mtcars)
resid <- tibble::tibble(residual = residuals(reg))
expect_equivalent(print(infer_runs_test(resid, residual)), x)
})
```

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