Understanding octal converter

Understanding assertions/base_conversion/octal_converter.rb

@@ -0,0 +1,19 @@
+class OctalConverter
+  def initialize(number)
+    @number = number
+  end
+
+  def convert
+    octal = []
+    if @number < 8
+      octal << @number
+    else
+      until @number.zero?
+        remainder = @number % 8
+        @number = @number / 8
+        octal.unshift(remainder)
+      end
+    end
+    octal
+  end
+end

Understanding assertions/base_conversion/test_octal_converter.rb

@@ -0,0 +1,10 @@
+require 'minitest/autorun'
+require_relative 'octal_converter'
+
+describe OctalConverter do
+  it 'should return 137 for 95' do
+    converter = OctalConverter.new(137)
+    result = converter.convert
+    assert_equal [2, 1, 1], result
+  end
+end