hash_assertions
Hash assertions: assert required keys, assert keys with values
Installation
Add this line to your application's Gemfile:
gem "hash_assertions"And then execute:
$ bundleOr install it yourself as:
$ gem install hash_assertionsand require it:
require "hash_assertions"Usage
assert_required_keys
require "hash_assertions/assert_required_keys"
# Raises nothing
{ foo: "bar", baz: "qux" }.assert_required_keys(:foo, :baz)
# Raises ArgumentError, "Missing required key: baz"
{ foo: "bar" }.assert_required_keys(:foo, :baz)
# Raises ArgumentError, "Missing required key: baz"
{ foo: "bar", baz: "qux" }.assert_required_keys(:foo, "baz")
# Raises ArgumentError, "Missing required key: [:foo, :baz]"
# (assert_required_keys doesn't flatten arguments!)
{ foo: "bar", baz: "qux" }.assert_required_keys([:foo, :baz])assert_keys_with_values
require "hash_assertions/assert_keys_with_values"
# Raises nothing
{ foo: "bar", baz: "qux" }.assert_keys_with_values(:foo, :baz)
# Raises nothing
# (blank string or empty array is treated as valid value)
{ foo: "bar", baz: "" }.assert_keys_with_values(:foo, :baz)
# Raises ArgumentError, "No value for key: baz"
{ foo: "bar", baz: nil }.assert_keys_with_values(:foo, :baz)
# Raises ArgumentError, "No value for key: baz"
{ foo: "bar", baz: "qux" }.assert_keys_with_values(:foo, "baz")
# Raises ArgumentError, "No value for key: [:foo, :baz]"
# (assert_keys_with_values doesn't flatten arguments!)
{ foo: "bar", baz: "qux" }.assert_keys_with_values([:foo, :baz])Contributing
- Fork it
- Create your feature branch (
git checkout -b my-new-feature) - Commit your changes (
git commit -am 'Add some feature') - Push to the branch (
git push origin my-new-feature) - Create new Pull Request