Pin versions in the offline buildpack

This commit fixes a broken test for the previous commit along with
some formatting issues.

[#93987158]

Author: Christopher Frost

lib/java_buildpack/util/configuration_utils.rb

@@ -64,18 +64,16 @@ def write(identifier, new_content, should_log = true)
             header = header(file)
 
             File.open(file, 'w') do |f|
-              header.each { |line| f.write line}
+              header.each { |line| f.write line }
               # f.write(header.join('\n'))
               # f.write('\n')
               YAML.dump(new_content, f)
             end
           else
             logger.debug { "No configuration file #{file} found" } if should_log
           end
-
         end
 
-
         private
 
         CONFIG_DIRECTORY = Pathname.new(File.expand_path('../../../config', File.dirname(__FILE__))).freeze

spec/java_buildpack/util/configuration_utils_spec.rb

@@ -37,9 +37,12 @@
   end
 
   it 'write configuration file' do
-    described_class.write('test', test_data)
-    expect(described_class.load('test')).to eq(test_data)
-    Pathname.new(File.expand_path('../../../config/test.yml', File.dirname(__FILE__))).delete
+    test_file = Pathname.new(File.expand_path('../../../config/tomcat.yml', File.dirname(__FILE__)))
+    original_content = file_contents test_file
+    loaded_content = described_class.load('tomcat')
+    described_class.write('tomcat', loaded_content)
+    expect(described_class.load('tomcat')).to eq(loaded_content)
+    expect(file_contents test_file).to eq(original_content)
   end
 
   context do
@@ -96,4 +99,16 @@
 
   end
 
+  private
+
+  def file_contents(file)
+    header = []
+    File.open(file, 'r') do |f|
+      f.each do |line|
+        header << line
+      end
+    end
+    header
+  end
+
 end