Change parameter order

lib/strings/wrap.rb

@@ -91,26 +91,26 @@ def format_paragraph(paragraph, wrap_at, ansi_stack)
         end
 
         if char == SPACE # ends with space
-          lines << insert_ansi(ansi_stack, line.join)
+          lines << insert_ansi(line.join, ansi_stack)
           line = []
           line_length = 0
           word << char
           word_length += char_length
         elsif word_length + char_length <= wrap_at
-          lines << insert_ansi(ansi_stack, line.join)
+          lines << insert_ansi(line.join, ansi_stack)
           line = [word.join + char]
           line_length = word_length + char_length
           word = []
           word_length = 0
         else # hyphenate word - too long to fit a line
-          lines << insert_ansi(ansi_stack, word.join)
+          lines << insert_ansi(word.join, ansi_stack)
           line_length = 0
           word = [char]
           word_length = char_length
         end
       end
-      lines << insert_ansi(ansi_stack, line.join) unless line.empty?
-      lines << insert_ansi(ansi_stack, word.join) unless word.empty?
+      lines << insert_ansi(line.join, ansi_stack) unless line.empty?
+      lines << insert_ansi(word.join, ansi_stack) unless word.empty?
       lines
     end
     module_function :format_paragraph
@@ -120,16 +120,16 @@ def format_paragraph(paragraph, wrap_at, ansi_stack)
     # Check if there are any ANSI states, if present
     # insert ANSI codes at given positions unwinding the stack.
     #
-    # @param [Array[Array[String, Integer]]] ansi_stack
-    #   the ANSI codes to apply
-    #
     # @param [String] string
     #   the string to insert ANSI codes into
     #
+    # @param [Array[Array[String, Integer]]] ansi_stack
+    #   the ANSI codes to apply
+    #
     # @return [String]
     #
     # @api private
-    def insert_ansi(ansi_stack, string)
+    def insert_ansi(string, ansi_stack = [])
       return string if ansi_stack.empty?
 
       pairs_to_remove = 0

spec/unit/wrap/insert_ansi_spec.rb

@@ -1,11 +1,19 @@
 # frozen_string_literal: true
 
 RSpec.describe "#insert_ansi" do
+  it "doesn't do anything when empty stack" do
+    text = "Ignorance is the parent of fear."
+
+    val = Strings::Wrap.insert_ansi(text, [])
+
+    expect(val).to eq(text)
+  end
+
   it "inserts ANSI strings in a single line" do
     text = "Ignorance is the parent of fear."
     stack = [["\e[32;44m", 0], ["\e[0m", text.size]]
 
-    val = Strings::Wrap.insert_ansi(stack, text)
+    val = Strings::Wrap.insert_ansi(text, stack)
 
     expect(val).to eq("\e[32;44mIgnorance is the parent of fear.\e[0m")
   end
@@ -14,7 +22,7 @@
     text = "Ignorance is the parent of fear."
     stack = [["\e[32;44m", 0]]
 
-    val = Strings::Wrap.insert_ansi(stack, text)
+    val = Strings::Wrap.insert_ansi(text, stack)
 
     expect(val).to eq("\e[32;44mIgnorance is the parent of fear.\e[0m")
   end
@@ -27,7 +35,7 @@
       ["\e[34m", 27], ["\e[0m", 31]
     ]
 
-    val = Strings::Wrap.insert_ansi(stack, text)
+    val = Strings::Wrap.insert_ansi(text, stack)
 
     expect(val).to eq("\e[32mIgnorance\e[0m is \e[33mthe\e[0m parent of \e[34mfear\e[0m.")
   end
@@ -36,7 +44,7 @@
     text = "Ignorance is the parent of fear."
     stack = [["\e[32m", 10], ["\e[33m", 17], ["\e[0m", 23], ["\e[0m", 26]]
 
-    val = Strings::Wrap.insert_ansi(stack, text)
+    val = Strings::Wrap.insert_ansi(text, stack)
 
     expect(val).to eq("Ignorance \e[32mis the \e[33mparent\e[0m of\e[0m fear.")
   end