add test for null section symtab

lib/vaporware/compiler/assembler/elf/section/symtab.rb

@@ -1,16 +1,14 @@
 class Vaporware::Compiler::Assembler::ELF::Section::Symtab
   include Vaporware::Compiler::Assembler::ELF::Utils
-  def initialize(name: 0, info: 0, other: 0, shndx: 0, value: 0, size: 0)
-    @name = num2bytes(name, 4)
-    @info = num2bytes(info, 1)
-    @other = num2bytes(other, 1)
-    @shndx = num2bytes(shndx, 4)
-    @value = num2bytes(value, 8)
-    @size = num2bytes(size, 8)
+  def initialize
+    @name = num2bytes(0, 4)
+    @info = num2bytes(0, 1)
+    @other = num2bytes(0, 1)
+    @shndx = num2bytes(0, 2)
+    @value = num2bytes(0, 8)
+    @size = num2bytes(0, 8)
   end
 
-  def build = bytes.flatten.pack("C*")
-
   def set!(name: nil, info: nil, other: nil, shndx: nil, value: nil, size: nil)
     @name = num2bytes(name, 4) if check(name, 4)
     @info = num2bytes(info, 1) if check(info, 4)
@@ -19,4 +17,7 @@ def set!(name: nil, info: nil, other: nil, shndx: nil, value: nil, size: nil)
     @value = num2bytes(value, 8) if check(value, 8)
     @size = num2bytes(size, 8) if check(size, 8)
   end
+
+  private
+  def bytes = [@name, @info, @other, @shndx, @value, @size]
 end

test/vaporware/compiler/assembler/elf/section/test_symtab.rb

@@ -0,0 +1,10 @@
+require "vaporware"
+require "test/unit"
+
+class Vaporware::Compiler::Assembler::ELF::Section::TestSymtab < Test::Unit::TestCase
+  def setup = @symtab = Vaporware::Compiler::Assembler::ELF::Section::Symtab.new
+  def test_set_values
+    binary = "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x01\x00\x00\x00\x10\x00\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00".force_encoding("ASCII-8BIT")
+    assert_equal(@symtab.build.size, binary.size)
+  end
+end