Add boxing spec

spec/boxing_spec.rb

@@ -0,0 +1,64 @@
+require File.expand_path(File.dirname(__FILE__) + '/spec_helper')
+
+describe "boxing support" do
+
+  def box expected
+    expected = remove_common_indent(expected)
+    unless expected.lines.first.strip =~ %r,^- \(id\)box:\(([^)]+)\)(\w+) \{$,
+      raise StandardError, "Invalid first line: #{expected.lines.first}"
+    end
+    type_string, var_name = $1.strip, $2.strip
+    type = XDry::VarType.parse(type_string)
+    raise "Invalid variable type '#{type_string}'" if type.nil?
+    boxer = XDry::Boxing.converter_for(type)
+    raise "No boxer available for variable type '#{type_string}'" if boxer.nil?
+    lines = XDry::Emitter.capture do |o|
+      o.block "- (id)box:(#{type.to_s})#{var_name}" do
+        o << "return " + boxer.box(o, var_name, "#{var_name}fix") + ";"
+      end
+    end
+    result = lines.join("\n").gsub("\t", "  ")
+    result.strip.should == expected.strip
+  end
+
+  it "should box NSString verbatim" do
+    box <<-END
+      - (id)box:(NSString *)foo {
+        return foo;
+      }
+    END
+  end
+
+  it "should box int via NSNumber" do
+    box <<-END
+      - (id)box:(int)foo {
+        return [NSNumber numberWithInt:foo];
+      }
+    END
+  end
+
+  it "should box NSInteger via NSNumber" do
+    box <<-END
+      - (id)box:(NSInteger)foo {
+        return [NSNumber numberWithInteger:foo];
+      }
+    END
+  end
+
+  it "should box float via NSNumber" do
+    box <<-END
+      - (id)box:(float)foo {
+        return [NSNumber numberWithFloat:foo];
+      }
+    END
+  end
+
+  it "should box double via NSNumber" do
+    box <<-END
+      - (id)box:(double)foo {
+        return [NSNumber numberWithDouble:foo];
+      }
+    END
+  end
+
+end

spec/spec_helper.rb

@@ -4,6 +4,11 @@
 require 'spec'
 require 'spec/autorun'
 
+def remove_common_indent content
+  first_line_indent = content.split("\n", 2).first.gsub(/\S.*$/, '')
+  content.gsub(/^#{first_line_indent}/, '')
+end
+
 def xdry gens, content
   config = XDry::Config.new
   config.verbose = ((ENV['VERBOSE'] || '0').to_i != 0)