helm_test.rb

require "minitest/autorun"
require 'yaml'

`make test-render`

def flatten_hash(object, current_path = [], result = {})
  case object
  when Hash
    object.each do |key, value|
      flatten_hash(value, current_path + [key], result)
    end
  when Array
    object.each_with_index do |value, index|
      flatten_hash(value, current_path + [index], result)
    end
  else
    result[current_path.join('.')] = object
  end
  result
end

def flatten_hashes(a)
  a.map { |x| flatten_hash(x) }
end

RENDERED_YAML = flatten_hashes(YAML.load_stream(File.read("test-render.yaml")).compact)

class MatchResult
  attr_reader :matched, :path, :expected, :got

  def initialize(matched, path, expected, got)
    @matched = matched
    @path = path
    @expected = expected
    @got = got
  end

  def inspect
    "matched: #{@matched}, path: #{@path}, expected: #{@expected}, got: #{@got}"
  end
end

def must_match_all_paths(paths_and_values)
  results = RENDERED_YAML.map do |x|
    paths_and_values.map do |path, value|
      v = x[path]

      MatchResult.new(v == value, path, value, v)
    end
  end

  if results.any? { |x| x.all?(&:matched) }
    return
  else
    results_with_any_matches = results.select { |x| x.any?(&:matched) }
    raise "No match for #{paths_and_values.inspect}\n\nfound partial matches:\n#{results_with_any_matches.map { |x| x.map {|v| "  #{v.inspect}"}.join("\n") }.join("\n\n")}\n\n"
  end
end

describe 'test-render.yaml' do
  it 'uses correct image for app deployment' do
    must_match_all_paths({
      "kind" =>
        "Deployment",
      "metadata.name" =>
        "release-name-app",
      "spec.template.spec.containers.0.image" =>
        "test-repository/test-app:yourAppImage-app",
    })
  end

  it 'uses correct image for sidekiq monitor deployment' do
    must_match_all_paths({
      "kind" =>
        "Deployment",
      "metadata.name" =>
        "release-name-sidekiq-monitor",
      "spec.template.spec.containers.0.image" =>
        "test-repository/test-app:yourAppImage-app",
    })
  end

  it 'uses correct image for sidekiq worker deployment' do
    must_match_all_paths({
      "kind" =>
        "Deployment",
      "metadata.name" =>
        "release-name-default-worker",
      "spec.template.spec.containers.0.image" =>
        "test-repository/test-app:yourAppImage-app",
    })
  end
end