
library(testthat)

source("user_code.R")
test_that("returns a labeled string with all components", {
  out <- format_statistical_results(1.5, 0.05, 0.2, "Some effect detected.")
  expect_type(out, "character")
  expect_true(grepl("Statistic: 1.5", out), info = "Should include labeled statistic with value.")
  expect_true(grepl("p-value: 0.05", out), info = "Should include labeled p-value with value.")
  expect_true(grepl("Effect size: 0.2", out), info = "Should include labeled effect size with value.")
  expect_true(grepl("Interpretation: Some effect detected.", out), info = "Should include labeled interpretation with value.")
})

test_that("combines values correctly in output string", {
  out <- format_statistical_results(-2.4, 0.001, 0.78, "Strong negative association.")
  expect_match(out, "^Statistic: -2.4; p-value: 0.001; Effect size: 0.78; Interpretation: Strong negative association.$", 
    info = "Should match the exact required format and value order.")
})

test_that("handles both positive and negative statistic values", {
  out_pos <- format_statistical_results(3.2, 0.04, 0.5, "Positive effect.")
  out_neg <- format_statistical_results(-3.2, 0.04, 0.5, "Negative effect.")
  expect_true(grepl("Statistic: 3.2", out_pos), info = "Should correctly handle positive statistic.")
  expect_true(grepl("Statistic: -3.2", out_neg), info = "Should correctly handle negative statistic.")
})

test_that("handles significant and non-significant p-values", {
  out_sig <- format_statistical_results(1.1, 0.02, 0.3, "Significant effect.")
  out_nonsig <- format_statistical_results(1.1, 0.3, 0.3, "No significant effect.")
  expect_true(grepl("p-value: 0.02", out_sig), info = "Should correctly handle significant p-value.")
  expect_true(grepl("p-value: 0.3", out_nonsig), info = "Should correctly handle non-significant p-value.")
})

test_main.R

A hands-on introduction to R programming tailored for biologists and bioinformaticians. Learn to analyze, visualize, and interpret biological data using R, with real-world examples from genomics, ecology, and experimental biology.

Learn the essentials of R programming with a focus on biological data, including variables, data types, and basic data manipulation.

Dive into statistical methods for analyzing biological data, including summary statistics, hypothesis testing, and interpreting results.

Master the art of visualizing biological data using R, from basic plots to more advanced visualizations relevant to experiments.

Learn to work with genomic-style data and develop reproducible workflows for scientific research in R.

Challenge: Reporting Biological Results

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