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rails--rails/railties/test/application/test_test.rb

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require 'isolation/abstract_unit'
module ApplicationTests
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class TestTest < ActiveSupport::TestCase
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include ActiveSupport::Testing::Isolation
def setup
build_app
boot_rails
end
def teardown
teardown_app
end
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test "truth" do
app_file 'test/unit/foo_test.rb', <<-RUBY
require 'test_helper'
class FooTest < ActiveSupport::TestCase
def test_truth
assert true
end
end
RUBY
assert_successful_test_run 'unit/foo_test.rb'
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end
test "integration test" do
controller 'posts', <<-RUBY
class PostsController < ActionController::Base
end
RUBY
app_file 'app/views/posts/index.html.erb', <<-HTML
Posts#index
HTML
app_file 'test/integration/posts_test.rb', <<-RUBY
require 'test_helper'
class PostsTest < ActionDispatch::IntegrationTest
def test_index
get '/posts'
assert_response :success
assert_template "index"
end
end
RUBY
assert_successful_test_run 'integration/posts_test.rb'
end
test "enable full backtraces on test failures" do
app_file 'test/unit/failing_test.rb', <<-RUBY
require 'test_helper'
class FailingTest < ActiveSupport::TestCase
def test_failure
raise "fail"
end
end
RUBY
output = run_test_file('unit/failing_test.rb', env: { "BACKTRACE" => "1" })
assert_match %r{/app/test/unit/failing_test\.rb}, output
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assert_match %r{/app/test/unit/failing_test\.rb:4}, output
end
test "ruby schema migrations" do
output = script('generate model user name:string')
version = output.match(/(\d+)_create_users\.rb/)[1]
app_file 'test/models/user_test.rb', <<-RUBY
require 'test_helper'
class UserTest < ActiveSupport::TestCase
test "user" do
User.create! name: "Jon"
end
end
RUBY
app_file 'db/schema.rb', ''
assert_unsuccessful_run "models/user_test.rb", "Migrations are pending"
app_file 'db/schema.rb', <<-RUBY
ActiveRecord::Schema.define(version: #{version}) do
create_table :users do |t|
t.string :name
end
end
RUBY
app_file 'config/initializers/disable_maintain_test_schema.rb', <<-RUBY
Rails.application.config.active_record.maintain_test_schema = false
RUBY
assert_unsuccessful_run "models/user_test.rb", "Could not find table 'users'"
File.delete "#{app_path}/config/initializers/disable_maintain_test_schema.rb"
result = assert_successful_test_run('models/user_test.rb')
assert !result.include?("create_table(:users)")
end
test "sql structure migrations" do
output = script('generate model user name:string')
version = output.match(/(\d+)_create_users\.rb/)[1]
app_file 'test/models/user_test.rb', <<-RUBY
require 'test_helper'
class UserTest < ActiveSupport::TestCase
test "user" do
User.create! name: "Jon"
end
end
RUBY
app_file 'db/structure.sql', ''
app_file 'config/initializers/enable_sql_schema_format.rb', <<-RUBY
Rails.application.config.active_record.schema_format = :sql
RUBY
assert_unsuccessful_run "models/user_test.rb", "Migrations are pending"
app_file 'db/structure.sql', <<-SQL
CREATE TABLE "schema_migrations" ("version" varchar(255) NOT NULL);
CREATE UNIQUE INDEX "unique_schema_migrations" ON "schema_migrations" ("version");
CREATE TABLE "users" ("id" INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL, "name" varchar(255));
INSERT INTO schema_migrations (version) VALUES ('#{version}');
SQL
app_file 'config/initializers/disable_maintain_test_schema.rb', <<-RUBY
Rails.application.config.active_record.maintain_test_schema = false
RUBY
assert_unsuccessful_run "models/user_test.rb", "Could not find table 'users'"
File.delete "#{app_path}/config/initializers/disable_maintain_test_schema.rb"
assert_successful_test_run('models/user_test.rb')
end
test "sql structure migrations when adding column to existing table" do
output_1 = script('generate model user name:string')
version_1 = output_1.match(/(\d+)_create_users\.rb/)[1]
app_file 'test/models/user_test.rb', <<-RUBY
require 'test_helper'
class UserTest < ActiveSupport::TestCase
test "user" do
User.create! name: "Jon"
end
end
RUBY
app_file 'config/initializers/enable_sql_schema_format.rb', <<-RUBY
Rails.application.config.active_record.schema_format = :sql
RUBY
app_file 'db/structure.sql', <<-SQL
CREATE TABLE "schema_migrations" ("version" varchar(255) NOT NULL);
CREATE UNIQUE INDEX "unique_schema_migrations" ON "schema_migrations" ("version");
CREATE TABLE "users" ("id" INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL, "name" varchar(255));
INSERT INTO schema_migrations (version) VALUES ('#{version_1}');
SQL
assert_successful_test_run('models/user_test.rb')
output_2 = script('generate migration add_email_to_users')
version_2 = output_2.match(/(\d+)_add_email_to_users\.rb/)[1]
app_file 'test/models/user_test.rb', <<-RUBY
require 'test_helper'
class UserTest < ActiveSupport::TestCase
test "user" do
User.create! name: "Jon", email: "jon@doe.com"
end
end
RUBY
app_file 'db/structure.sql', <<-SQL
CREATE TABLE "schema_migrations" ("version" varchar(255) NOT NULL);
CREATE UNIQUE INDEX "unique_schema_migrations" ON "schema_migrations" ("version");
CREATE TABLE "users" ("id" INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL, "name" varchar(255), "email" varchar(255));
INSERT INTO schema_migrations (version) VALUES ('#{version_1}');
INSERT INTO schema_migrations (version) VALUES ('#{version_2}');
SQL
assert_successful_test_run('models/user_test.rb')
end
# TODO: would be nice if we could detect the schema change automatically.
# For now, the user has to synchronize the schema manually.
# This test-case serves as a reminder for this use-case.
test "manually synchronize test schema after rollback" do
output = script('generate model user name:string')
version = output.match(/(\d+)_create_users\.rb/)[1]
app_file 'test/models/user_test.rb', <<-RUBY
require 'test_helper'
class UserTest < ActiveSupport::TestCase
test "user" do
assert_equal ["id", "name"], User.columns_hash.keys
end
end
RUBY
app_file 'db/schema.rb', <<-RUBY
ActiveRecord::Schema.define(version: #{version}) do
create_table :users do |t|
t.string :name
end
end
RUBY
assert_successful_test_run "models/user_test.rb"
# Simulate `db:rollback` + edit of the migration file + `db:migrate`
app_file 'db/schema.rb', <<-RUBY
ActiveRecord::Schema.define(version: #{version}) do
create_table :users do |t|
t.string :name
t.integer :age
end
end
RUBY
assert_successful_test_run "models/user_test.rb"
Dir.chdir(app_path) { `bin/rake db:test:prepare` }
assert_unsuccessful_run "models/user_test.rb", <<-ASSERTION
Expected: ["id", "name"]
Actual: ["id", "name", "age"]
ASSERTION
end
test "hooks for plugins" do
output = script('generate model user name:string')
version = output.match(/(\d+)_create_users\.rb/)[1]
app_file 'lib/tasks/hooks.rake', <<-RUBY
task :before_hook do
has_user_table = ActiveRecord::Base.connection.table_exists?('users')
puts "before: " + has_user_table.to_s
end
task :after_hook do
has_user_table = ActiveRecord::Base.connection.table_exists?('users')
puts "after: " + has_user_table.to_s
end
Rake::Task["db:test:prepare"].enhance [:before_hook] do
Rake::Task[:after_hook].invoke
end
RUBY
app_file 'test/models/user_test.rb', <<-RUBY
require 'test_helper'
class UserTest < ActiveSupport::TestCase
test "user" do
User.create! name: "Jon"
end
end
RUBY
# Simulate `db:migrate`
app_file 'db/schema.rb', <<-RUBY
ActiveRecord::Schema.define(version: #{version}) do
create_table :users do |t|
t.string :name
end
end
RUBY
output = assert_successful_test_run "models/user_test.rb"
assert_includes output, "before: false\nafter: true"
# running tests again won't trigger a schema update
output = assert_successful_test_run "models/user_test.rb"
assert_not_includes output, "before:"
assert_not_includes output, "after:"
end
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private
def assert_unsuccessful_run(name, message)
result = run_test_file(name)
assert_not_equal 0, $?.to_i
assert result.include?(message)
result
end
def assert_successful_test_run(name)
result = run_test_file(name)
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assert_equal 0, $?.to_i, result
result
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end
def run_test_file(name, options = {})
Dir.chdir(app_path) { `bin/rails test "#{app_path}/test/#{name}" 2>&1` }
end
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end
end