Poor man's test suite in Bash

poor_mans_test_suite_in_bash

#!/bin/bash

function setup {
  [ -z "$FILES_HOST"] && FILES_HOST=localhost
}

function teardown {
  echo "REMOVE ALL THE FILES FROM BUCKET"
}

function test_healthcheck_endpoint {
  response=$(curl --verbose $FILES_HOST/check 2>&1)

  assert_contains "$response" "< HTTP/1.1 200 OK" && \
  assert_contains "$response" "Content-Type: application/json" && \
  assert_contains "$response" '{ "service": "files", "status": "healthy" }'
}

function test_upload_endpoint_rejects_get_requests {
  response=$(request GET)

  assert_contains "$response" "< HTTP/1.1 404 Not Found"
}

function test_upload_endpoint_rejects_put_requests {
  response=$(request PUT)

  assert_contains "$response" "< HTTP/1.1 404 Not Found"
}

function test_upload_endpoint_rejects_delete_requests {
  response=$(request DELETE)

  assert_contains "$response" "< HTTP/1.1 404 Not Found"
}

function test_upload_endpoint_rejects_requests_without_content_type {
  response=$(request POST "")

  assert_contains "$response" "< HTTP/1.1 415 Unsupported Media Type"
}

function test_upload_endpoint_rejects_requests_with_unsupported_content_type {
  response=$(request POST application/json)

  assert_contains "$response" "< HTTP/1.1 415 Unsupported Media Type"
}

function test_rejects_multipart_formdata_requests {
  echo "YES"
}

function test_uploads_image_png_files {
  filepath=${BASH_SOURCE%/*}/fixtures/test_4x4.png

  response=$(request POST image/png --data-binary @"$filepath")

  assert_file_uploaded_equal $(get_file_url "$response") $filepath
}

function test_resizes_image_png_files {
  resized_filepath=${BASH_SOURCE%/*}/fixtures/test_2x2.png
  filepath=${BASH_SOURCE%/*}/fixtures/test_4x4.png

  response=$(request POST image/png --data-binary @"$filepath")

  assert_file_uploaded_equal "$(get_file_url "$response")?w=2" $resized_filepath
}

function test_uploads_image_jpeg_files {
  echo "YES"
}

function test_resizes_image_jpeg_files {
  echo "YES"
}

function test_uploads_image_gif_files {
  echo "YES"
}

function test_resizes_image_gif_files {
  echo "YES"
}

function test_resizing_parameters {
  echo "YES"
}

function test_resizing_with_non_compatible_image_files {
  echo "YES"
}

function test_uploads_text_plain_files {
  filepath=${BASH_SOURCE%/*}/fixtures/test.txt

  response=$(request POST text/plain --data-binary @"$filepath")

  assert_file_uploaded_equal $(get_file_url "$response") $filepath
}

function test_ignores_resizing_parameters_with_text_plain_files {
  filepath=${BASH_SOURCE%/*}/fixtures/test.txt

  response=$(request POST text/plain --data-binary @"$filepath")

  assert_file_uploaded_equal "$(get_file_url "$response")?w=20" $filepath
}

function request {
  method=$1; shift
  content_type=$1; shift
  curl --verbose --request $method --header "Content-Type: $content_type" $@ $FILES_HOST 2>&1
}

function get_file_url {
  echo "$1" | grep "X-File-URL" | cut -d " " -f 3 | tr -d '\r'
}

function assert_file_uploaded_equal {
  file_url=$1
  file_url_with_params=${file_url%\?*}
  filename=${file_url_with_params##*/}

  curl -o /tmp/$filename $file_url 2>&1

  cmp /tmp/$filename $2
}

function assert_contains {
  echo "$1" | grep "$2"
}

function run_tests {
  SECONDS=0
  failures_count=0
  test_count=0
  tests=$(grep -E "function test_" $0 | grep -v grep | cut -d " " -f 2)

  setup > /dev/null 2>&1

  for test in $tests
  do
    test_count=$((test_count+1))
    test_output=$(eval $test)

    if [ $? -eq 0 ]
    then
      printf "\33[0;32m.\33[0m"
    else
      failures_count=$((failures_count+1))
      printf "\n\33[0;31mE\n\nTest $test failed\n\nOutput:\n\n$test_output\33[0m\n"
    fi
  done

  teardown > /dev/null 2>&1

  echo
  echo
  echo "Finished in ${SECONDS}s"
  echo
  echo "$test_count tests, $failures_count failures"
  exit $failures_count
}

run_tests