Accept only valid snake case in interactive input

Author: ChillerDragon

lib/cli.rb

@@ -139,9 +139,19 @@ def gets_number
     end
   end
 
+  def gets_snake_case
+    loop do
+      print '> '
+      val = $stdin.gets.chomp
+      return val if val.lower_snake_case?
+
+      puts 'Value has to be lower_snake_caase. Please try again.'
+    end
+  end
+
   def fetch_args_interactive
     puts 'Choose your controller name (use lower_snake_case)'
-    @args[:name] = gets_non_empty
+    @args[:name] = gets_snake_case
 
     puts 'Choose your parent controller'
     # passing parent as a string if we already have an object is hacky

lib/strings.rb

@@ -16,6 +16,10 @@ def to_camel
     self
   end
 
+  def lower_snake_case?
+    match?(/^[a-z_]+$/)
+  end
+
   def to_snake
     return self if match?(/_/)
 

spec/strings_spec.rb

@@ -20,5 +20,12 @@
       expect('hello_world'.to_camel).to eq('HelloWorld')
       expect('hello'.to_camel).to eq('Hello')
     end
+    it 'Should detect snake case' do
+      expect('HelloWorld'.lower_snake_case?).to eq(false)
+      expect('helloW'.lower_snake_case?).to eq(false)
+      expect('HellO__'.lower_snake_case?).to eq(false)
+      expect('hello'.lower_snake_case?).to eq(true)
+      expect('hello_world'.lower_snake_case?).to eq(true)
+    end
   end
 end