Add assignments

materials/tutorial_04/tests_tutorial_04.R

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+library(digest)
+library(testthat)
+
+test_1.1 <- function() {
+  test_that('Did not assign answer to an object called "crabs_vs_width_scatterplot"', {
+    expect_true(exists("crabs_vs_width_scatterplot"))
+  })
+
+  test_that("Solution should be a ggplot object", {
+    expect_true(is.ggplot(crabs_vs_width_scatterplot))
+  })
+
+  properties <- c(crabs_vs_width_scatterplot$layers[[1]]$mapping, crabs_vs_width_scatterplot$mapping)
+
+  test_that("Plot should have width on the x-axis", {
+    expect_true("width" == rlang::get_expr(properties$x))
+  })
+
+  test_that("Plot does not have the correct layers", {
+    expect_true("GeomPoint" %in% class(crabs_vs_width_scatterplot$layers[[1]]$geom))
+
+    # Remove if not needed:
+    # expect_true("GeomVline" %in% class(crabs_vs_width_scatterplot$layers[[2]]$geom))
+  })
+
+  test_that("Plot does not use the correct data", {
+    expect_equal(digest(nrow(crabs_vs_width_scatterplot$data)), "8c2afe893b01f3a8c63e1aef3b5aad9e")
+    expect_equal(digest(round(sum(crabs_vs_width_scatterplot$data$width))), "17a701ffb51e7429bcd57678dd80b402")
+
+    # If width is not known:
+    # expect_equal(digest(round(sum(pull(crabs_vs_width_scatterplot$data, rlang::get_expr(properties$x))))), "HASH_HERE")
+  })
+
+  test_that("x-axis label should be descriptive and human readable", {
+    expect_false(crabs_vs_width_scatterplot$labels$x == toString(rlang::get_expr(properties$x)))
+  })
+
+  test_that("Plot should have a title", {
+    expect_true("title" %in% names(crabs_vs_width_scatterplot$labels))
+  })
+
+  print("Success!")
+}
+
+test_1.2 <- function() {
+  test_that('Did not assign answer to an object called "crabs_group_avg_width"', {
+    expect_true(exists("crabs_group_avg_width"))
+  })
+
+  test_that("Solution should be a data frame", {
+    expect_true("data.frame" %in% class(crabs_group_avg_width))
+  })
+
+  expected_colnames <- c("width_intervals", "mean_n_males")
+  given_colnames <- colnames(crabs_group_avg_width)
+  test_that("Data frame does not have the correct columns", {
+    expect_equal(length(setdiff(
+      union(expected_colnames, given_colnames),
+      intersect(expected_colnames, given_colnames)
+    )), 0)
+  })
+
+  test_that("Data frame does not contain the correct number of rows", {
+    expect_equal(digest(as.integer(nrow(crabs_group_avg_width))), "71db8a6cad03244e6e50f0ad8bc95a65")
+  })
+
+  test_that("Data frame does not contain the correct data", {
+    expect_equal(digest(as.integer(sum(crabs_group_avg_width$mean_n_males) * 10e4)), "12273d78c0faff1ea67c8f8e9c42edd0")
+  })
+
+  print("Success!")
+}
+
+test_1.3 <- function() {
+  test_that('Did not assign answer to an object called "crabs_avg_width_scatterplot"', {
+    expect_true(exists("crabs_avg_width_scatterplot"))
+  })
+
+  test_that("Solution should be a ggplot object", {
+    expect_true(is.ggplot(crabs_avg_width_scatterplot))
+  })
+
+  properties <- c(crabs_avg_width_scatterplot$layers[[1]]$mapping, crabs_avg_width_scatterplot$mapping)
+
+  test_that("Plot should have width_intervals on the x-axis", {
+    expect_true("width_intervals" == rlang::get_expr(properties$x))
+  })
+
+  test_that("Plot does not have the correct layers", {
+    expect_true("GeomPoint" %in% class(crabs_avg_width_scatterplot$layers[[1]]$geom))
+
+    # Remove if not needed:
+    # expect_true("GeomVline" %in% class(crabs_avg_width_scatterplot$layers[[2]]$geom))
+  })
+
+  test_that("Plot does not use the correct data", {
+    expect_equal(digest(nrow(crabs_avg_width_scatterplot$data)), "71db8a6cad03244e6e50f0ad8bc95a65")
+    expect_equal(digest(round(sum(crabs_avg_width_scatterplot$data$mean_n_males))), "e1d9279a9999b2d3bb972ab3267b49c7")
+
+    # If width_intervals is not known:
+    # expect_equal(digest(round(sum(pull(crabs_avg_width_scatterplot$data, rlang::get_expr(properties$x))))), "HASH_HERE")
+  })
+
+  test_that("x-axis label should be descriptive and human readable", {
+    expect_false(crabs_avg_width_scatterplot$labels$x == toString(rlang::get_expr(properties$x)))
+  })
+
+  test_that("Plot should have a title", {
+    expect_true("title" %in% names(crabs_avg_width_scatterplot$labels))
+  })
+
+  print("Success!")
+}
+
+test_1.4 <- function() {
+  test_that('Did not assign answer to an object called "answer1.4"', {
+    expect_true(exists("answer1.4"))
+  })
+
+  test_that('Solution should be a single character ("A", "B", or "C")', {
+    expect_match(answer1.4, "a|b|c", ignore.case = TRUE)
+  })
+
+  answer_hash <- digest(tolower(answer1.4))
+
+  test_that("Solution is incorrect", {
+    expect_equal(answer_hash, "127a2ec00989b9f7faf671ed470be7f8")
+  })
+
+  print("Success!")
+}
+
+test_1.5 <- function() {
+  test_that('Did not assign answer to an object called "crabs_vs_width_scatterplot"', {
+    expect_true(exists("crabs_vs_width_scatterplot"))
+  })
+
+  test_that("Solution should be a ggplot object", {
+    expect_true(is.ggplot(crabs_vs_width_scatterplot))
+  })
+
+  properties <- c(crabs_vs_width_scatterplot$layers[[1]]$mapping, crabs_vs_width_scatterplot$mapping)
+
+  test_that("Plot should have width on the x-axis", {
+    expect_true("width" == rlang::get_expr(properties$x))
+  })
+
+  test_that("Plot does not have the correct layers", {
+    expect_true("GeomPoint" %in% class(crabs_vs_width_scatterplot$layers[[1]]$geom))
+  })
+
+
+  test_that("Plot does not use the correct data", {
+    expect_equal(digest(nrow(crabs_vs_width_scatterplot$data)), "8c2afe893b01f3a8c63e1aef3b5aad9e")
+    expect_equal(digest(round(sum(crabs_vs_width_scatterplot$data$width))), "17a701ffb51e7429bcd57678dd80b402")
+
+    # If width is not known:
+    # expect_equal(digest(round(sum(pull(crabs_vs_width_scatterplot$data, rlang::get_expr(properties$x))))), "HASH_HERE")
+  })
+
+  test_that("x-axis label should be descriptive and human readable", {
+    expect_false(crabs_vs_width_scatterplot$labels$x == toString(rlang::get_expr(properties$x)))
+  })
+
+  test_that("Plot should have a title", {
+    expect_true("title" %in% names(crabs_vs_width_scatterplot$labels))
+  })
+
+  print("Success!")
+}
+
+
+test_1.6 <- function() {
+  test_that('Did not assign answer to an object called "crabs_poisson_model"', {
+    expect_true(exists("crabs_poisson_model"))
+  })
+
+  test_that("Solution should be a glm object", {
+    expect_true("glm" %in% class(crabs_poisson_model))
+  })
+
+  test_that("Data frame does not contain the correct data", {
+    expect_equal(digest(as.integer(sum(crabs_poisson_model$residuals) * 10e4)), "5ab35ebc157c4f75476569c445d5a1cc")
+  })
+
+  print("Success!")
+}
+
+test_1.7 <- function() {
+  test_that('Did not assign answer to an object called "crabs_poisson_model_results"', {
+    expect_true(exists("crabs_poisson_model_results"))
+  })
+
+  test_that("Solution should be a data frame", {
+    expect_true("data.frame" %in% class(crabs_poisson_model_results))
+  })
+
+  expected_colnames <- c('term','estimate','std.error','statistic','p.value','conf.low','conf.high')
+
+
+  given_colnames <- colnames(crabs_poisson_model_results)
+  test_that("Data frame does not have the correct columns", {
+    expect_equal(length(setdiff(
+      union(expected_colnames, given_colnames),
+      intersect(expected_colnames, given_colnames)
+    )), 0)
+  })
+
+  test_that("Data frame does not contain the correct number of rows", {
+    expect_equal(digest(as.integer(nrow(crabs_poisson_model_results))), "dd4ad37ee474732a009111e3456e7ed7")
+  })
+
+  test_that("Data frame does not contain the correct data", {
+    expect_equal(digest(as.integer(sum(crabs_poisson_model_results$conf.low) * 10e6)), "79cef645627327fe2632a29728949fa8")
+    expect_equal(digest(as.integer(sum(crabs_poisson_model_results$conf.high) * 10e6)), "b2f64ff96ebb309861a640e306397224")
+    expect_equal(digest(as.integer(sum(crabs_poisson_model_results$statistic) * 10e6)), "09ad422316ee480535d0735aedfb2543")
+  })
+
+  print("Success!")
+}
+
+test_1.8 <- function() {
+  test_that('Did not assign answer to an object called "crabs_poisson_model_results"', {
+    expect_true(exists("crabs_poisson_model_results"))
+  })
+
+  test_that("Solution should be a data frame", {
+    expect_true("data.frame" %in% class(crabs_poisson_model_results))
+  })
+
+  expected_colnames <- c('term','estimate','std.error','statistic','p.value','conf.low','conf.high', 'exp.estimate', 'exp.conf.low', 'exp.conf.high')
+
+  given_colnames <- colnames(crabs_poisson_model_results)
+  test_that("Data frame does not have the correct columns", {
+    expect_equal(length(setdiff(
+      union(expected_colnames, given_colnames),
+      intersect(expected_colnames, given_colnames)
+    )), 0)
+  })
+
+  test_that("Data frame does not contain the correct number of rows", {
+    expect_equal(digest(as.integer(nrow(crabs_poisson_model_results))), "dd4ad37ee474732a009111e3456e7ed7")
+  })
+
+  test_that("Data frame does not contain the correct data", {
+    expect_equal(digest(as.integer(sum(crabs_poisson_model_results$exp.estimate) * 10e6)), "dd50342cffd6d0cde245787cbdd97021")
+    expect_equal(digest(as.integer(sum(crabs_poisson_model_results$exp.conf.low) * 10e6)), "5aa9e6879f68968bdb958bdc1a4cdf32")
+    expect_equal(digest(as.integer(sum(crabs_poisson_model_results$exp.conf.high) * 10e6)), "b6866c669fd240e038b16d7e35b90592")
+  })
+
+  print("Success!")
+}
+
+test_1.9 <- function() {
+  test_that('Did not assign answer to an object called "answer1.9"', {
+    expect_true(exists("answer1.9"))
+  })
+
+  answer_hash <- digest(tolower(answer1.9))
+  test_that("Solution is incorrect", {
+    expect_equal(answer_hash, "fd4d64bc84d8d1ac10b94c23bda1a016")
+  })
+
+  print("Success!")
+}
+
+test_1.10 <- function() {
+  test_that('Did not assign answer to an object called "answer1.10"', {
+    expect_true(exists("answer1.10"))
+  })
+
+  test_that('Solution should be a single character ("A", "B", "C", or "D")', {
+    expect_match(answer1.10, "a|b|c|d", ignore.case = TRUE)
+  })
+
+  answer_hash <- digest(tolower(answer1.10))
+  test_that("Solution is incorrect", {
+    expect_equal(answer_hash, "6e7a8c1c098e8817e3df3fd1b21149d1")
+  })
+
+  print("Success!")
+}
+
+test_1.11 <- function() {
+  test_that('Did not assign answer to an object called "answer1.11"', {
+    expect_true(exists("answer1.11"))
+  })
+
+  test_that('Solution should be a single character ("A", "B", "C", or "D")', {
+    expect_match(answer1.11, "a|b|c|d", ignore.case = TRUE)
+  })
+
+  answer_hash <- digest(tolower(answer1.11))
+  test_that("Solution is incorrect", {
+    expect_equal(answer_hash, "ddf100612805359cd81fdc5ce3b9fbba")
+  })
+
+  print("Success!")
+}
+
+test_1.12 <- function() {
+  test_that('Did not assign answer to an object called "answer1.12"', {
+    expect_true(exists("answer1.12"))
+  })
+
+  answer_as_numeric <- as.numeric(answer1.12)
+  test_that("Solution should be a number", {
+    expect_false(is.na(answer_as_numeric))
+  })
+
+  test_that("Solution is incorrect", {
+    expect_equal(digest(as.integer(answer_as_numeric * 10e6)), "07660fdc17d69e9b645c10b4a1f810be")
+  })
+
+  print("Success!")
+}