Add specs

Author: davidstosik

spec/overcommit/hook/pre_commit/file_size_spec.rb

@@ -0,0 +1,45 @@
+# frozen_string_literal: true
+
+require 'spec_helper'
+
+describe Overcommit::Hook::PreCommit::FileSize do
+  let(:config) do
+    Overcommit::ConfigurationLoader.default_configuration.merge(
+      Overcommit::Configuration.new(
+        'PreCommit' => {
+          'FileSize' => {
+            'size_limit_bytes' => 10
+          }
+        }
+      )
+    )
+  end
+
+  let(:context) { double('context') }
+  subject { described_class.new(config, context) }
+  let(:staged_file) { 'filename.txt' }
+
+  before do
+    subject.stub(:applicable_files).and_return([staged_file])
+  end
+
+  around do |example|
+    repo do
+      File.open(staged_file, 'w') { |f| f.write(contents) }
+      `git add "#{staged_file}" > #{File::NULL} 2>&1`
+      example.run
+    end
+  end
+
+  context 'when a big file is committed' do
+    let(:contents) { 'longer than 10 bytes' }
+
+    it { should fail_hook }
+  end
+
+  context 'when a small file is committed' do
+    let(:contents) { 'short' }
+
+    it { should_not fail_hook }
+  end
+end