cache_check work

features/cache_check.feature

@@ -0,0 +1,76 @@
+Feature: cache_check
+  Scenario: print version (-V flag)
+    When I run `cache_check -V`
+    
+    Then it should pass
+    And version to stdout
+
+  Scenario: print version (--version flag)
+    When I run `cache_check --version`
+
+    Then it should pass
+    And version to stdout
+
+  Scenario: print help
+    When I run `cache_check --help`
+
+    Then it should pass
+    And usage to stdout
+
+  Scenario: print help
+    When I run `cache_check -h`
+
+    Then it should pass
+    And usage to stdout
+
+  Scenario: Metadata file must be specified
+    When I run `cache_check`
+
+    Then it should fail
+    And usage to stderr
+    And the stderr should contain:
+
+    """
+    No input file provided.
+    """
+
+  Scenario: Metadata file doesn't exist
+    When I run `cache_check /arbitrary/filename`
+
+    Then it should fail
+    And the stderr should contain:
+    """
+    /arbitrary/filename: No such file or directory
+    """
+
+  Scenario: Metadata file cannot be a directory
+    Given a directory called foo
+
+    When I run `cache_check foo`
+
+    Then it should fail
+    And the stderr should contain:
+    """
+    foo: Not a block device or regular file
+    """
+
+  Scenario: Metadata file exists, but can't be opened
+    Given input without read permissions
+
+    When I run `cache_check input`
+
+    Then it should fail
+    And the stderr should contain:
+    """
+    input: Permission denied
+    """
+
+  Scenario: Metadata file full of zeroes
+    Given input file
+    And block 1 is zeroed
+
+    When I run `cache_check input`
+    And the stderr should contain:
+    """
+    input: No superblock found
+    """

features/step_definitions/cache_check_steps.rb

@@ -0,0 +1,57 @@
+DEFAULT_INPUT = 'input'
+BLOCK_SIZE = 4096
+
+Given /^a directory called (.*)\s*$/ do |dir|
+  create_dir(dir)
+end
+
+Given /^input without read permissions$/ do
+  write_file(DEFAULT_INPUT, "\0" * 4096)
+  in_current_dir do
+    f = File.new(DEFAULT_INPUT)
+    f.chmod(0000)
+  end
+end
+
+Given(/^input file$/) do
+  write_file(DEFAULT_INPUT, "\0" * BLOCK_SIZE * 1024)
+end
+
+Given(/^block (\d+) is zeroed$/) do |b|
+  in_current_dir do
+    File.open(DEFAULT_INPUT, 'w') do |f|
+      f.seek(BLOCK_SIZE * b.to_i, IO::SEEK_SET)
+      f.write("\0" * BLOCK_SIZE)
+    end
+  end
+end
+
+Then /^it should pass$/ do
+  assert_success(true)
+end
+
+Then /^it should fail$/ do
+  assert_success(false)
+end
+
+VERSION="0.1.6\n"
+
+Then /^version to stdout$/ do
+  assert_exact_output(VERSION, all_stdout)
+end
+
+USAGE =<<EOF
+Usage: cache_check [options] {device|file}
+Options:
+  {-q|--quiet}
+  {-h|--help}
+  {-V|--version}
+EOF
+
+Then /^usage to stdout$/ do
+  assert_partial_output(USAGE, all_stdout)
+end
+
+Then /^usage to stderr$/ do
+  assert_partial_output(USAGE, all_stderr)
+end

features/support/aruba.rb

@@ -1,4 +1,3 @@
 require 'aruba/cucumber'
 
-STDERR.puts "pwd = #{Dir::pwd}"
 ENV['PATH'] = "#{Dir::pwd}:#{ENV['PATH']}"