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module Rails
module Generators
module Testing
module Assertions
METHOD_DECLARATION_REGEXP = /(\s+)def #{method}(\(.+\))?(.*?)\n\1end/m
# Asserts a given file exists. You need to supply an absolute path or a path relative
# to the configured destination:
#
# assert_file "config/environment.rb"
#
# You can also give extra arguments. If the argument is a regexp, it will check if the
# regular expression matches the given file content. If it's a string, it compares the
# file with the given string:
#
# assert_file "config/environment.rb", /initialize/
#
# Finally, when a block is given, it yields the file content:
#
# assert_file "app/controllers/products_controller.rb" do |controller|
# assert_instance_method :index, controller do |index|
# assert_match(/Product\.all/, index)
# end
# end
def assert_file(relative, *contents)
absolute = File.expand_path(relative, destination_root)
assert File.exists?(absolute), "Expected file #{relative.inspect} to exist, but does not"
read = File.read(absolute) if block_given? || !contents.empty?
yield read if block_given?
contents.each do |content|
case content
when String
assert_equal content, read
when Regexp
assert_match content, read
end
end
end
alias :assert_directory :assert_file
# Asserts a given file does not exist. You need to supply an absolute path or a
# path relative to the configured destination:
#
# assert_no_file "config/random.rb"
def assert_no_file(relative)
absolute = File.expand_path(relative, destination_root)
assert !File.exists?(absolute), "Expected file #{relative.inspect} to not exist, but does"
end
alias :assert_no_directory :assert_no_file
# Asserts a given migration exists. You need to supply an absolute path or a
# path relative to the configured destination:
#
# assert_migration "db/migrate/create_products.rb"
#
# This method manipulates the given path and tries to find any migration which
# matches the migration name. For example, the call above is converted to:
#
# assert_file "db/migrate/003_create_products.rb"
#
# Consequently, assert_migration accepts the same arguments has assert_file.
def assert_migration(relative, *contents, &block)
file_name = migration_file_name(relative)
assert file_name, "Expected migration #{relative} to exist, but was not found"
assert_file file_name, *contents, &block
end
# Asserts a given migration does not exist. You need to supply an absolute path or a
# path relative to the configured destination:
#
# assert_no_migration "db/migrate/create_products.rb"
def assert_no_migration(relative)
file_name = migration_file_name(relative)
assert_nil file_name, "Expected migration #{relative} to not exist, but found #{file_name}"
end
# Asserts the given class method exists in the given content. This method does not detect
# class methods inside (class << self), only class methods which starts with "self.".
# When a block is given, it yields the content of the method.
#
# assert_migration "db/migrate/create_products.rb" do |migration|
# assert_class_method :up, migration do |up|
# assert_match(/create_table/, up)
# end
# end
def assert_class_method(method, content, &block)
assert_instance_method "self.#{method}", content, &block
end
# Asserts the given method exists in the given content. When a block is given,
# it yields the content of the method.
#
# assert_file "app/controllers/products_controller.rb" do |controller|
# assert_instance_method :index, controller do |index|
# assert_match(/Product\.all/, index)
# end
# end
def assert_instance_method(method, content)
assert content =~ METHOD_DECLARATION_REGEXP, "Expected to have method #{method}"
yield $3.strip if block_given?
end
alias :assert_method :assert_instance_method
# Asserts the given attribute type gets translated to a field type
# properly:
#
# assert_field_type :date, :date_select
def assert_field_type(attribute_type, field_type)
assert_equal(field_type, create_generated_attribute(attribute_type).field_type)
end
# Asserts the given attribute type gets a proper default value:
#
# assert_field_default_value :string, "MyString"
def assert_field_default_value(attribute_type, value)
assert_equal(value, create_generated_attribute(attribute_type).default)
end
end
end
end
end
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