trueheart78 · July 9, 2024 15:37 · Jul 9, 2024 · Jul 9, 2024
diff --git a/junklet.rb b/junklet.rb
@@ -1,5 +1,6 @@
 # All credit to Dave Brady & his RSpec-Junklet Project that changed how I think about test data.
-# https://rubygems.org/profiles/dbrady
+# * https://rubygems.org/profiles/dbrady
+# Place in rspec/support/junklet.rb and have the rails_helper.rb load it
 
 # Returns randomized data for when we don't care *what* the data is.
 def junk(length = 32)

diff --git a/junklet.rb b/junklet.rb
@@ -0,0 +1,32 @@
+# All credit to Dave Brady & his RSpec-Junklet Project that changed how I think about test data.
+# https://rubygems.org/profiles/dbrady
+
+# Returns randomized data for when we don't care *what* the data is.
+def junk(length = 32)
+  # hex returns length*2 digits, because it returns a 0..255 byte
+  # as a hex pair. But when we want junk, we want *bytes* of
+  # junk. Get (length+1)/2 chars, which will be correct for even
+  # sizes and 1 char too many for odds, so trim off with [0...length]
+  SecureRandom.hex((length + 1) / 2)[0...length]
+end
+
+# Use in context and describe blocks.
+# Example:
+#  junklet :random_one, :random_two, :random_forty_two
+def junklet(*args)
+  opts = args.size > 1 && !args.last.is_a?(Symbol) && args.pop || {}
+
+  names = args.map(&:to_s)
+
+  separator = opts[:separator] || "_"
+  names = names.map {|name| name.gsub(/_/, separator) }
+
+  args.zip(names).each do |arg, name|
+    make_junklet arg, name, separator
+  end
+end
+
+# Makes the magic happen for the junklet call in describe and context blocks.
+def make_junklet(let_name, name, separator)
+  let(let_name) { "#{name}#{separator}#{junk}" }
+end