How to use capture_io method of Assertions Package

Best Minitest_ruby code snippet using Assertions.capture_io

test_rake_application.rb

Source:test_rake_application.rb

...5    @app = Rake.application6    @app.options.rakelib = []7  end8  def test_constant_warning9    _, err = capture_io do @app.instance_eval { const_warning("Task") } end10    assert_match(/warning/i, err)11    assert_match(/deprecated/i, err)12    assert_match(/Task/i, err)13  end14  def test_display_tasks15    @app.options.show_tasks = :tasks16    @app.options.show_task_pattern = //17    @app.last_description = "COMMENT"18    @app.define_task(Rake::Task, "t")19    out, = capture_io do @app.instance_eval { display_tasks_and_comments } end20    assert_match(/^rake t/, out)21    assert_match(/# COMMENT/, out)22  end23  def test_display_tasks_with_long_comments24    @app.terminal_columns = 8025    @app.options.show_tasks = :tasks26    @app.options.show_task_pattern = //27    @app.last_description = "1234567890" * 828    @app.define_task(Rake::Task, "t")29    out, = capture_io do @app.instance_eval { display_tasks_and_comments } end30    assert_match(/^rake t/, out)31    assert_match(/# 12345678901234567890123456789012345678901234567890123456789012345\.\.\./, out)32  end33  def test_display_tasks_with_task_name_wider_than_tty_display34    @app.terminal_columns = 8035    @app.options.show_tasks = :tasks36    @app.options.show_task_pattern = //37    task_name = "task name" * 8038    @app.last_description = "something short"39    @app.define_task(Rake::Task, task_name )40    out, = capture_io do @app.instance_eval { display_tasks_and_comments } end41    # Ensure the entire task name is output and we end up showing no description42    assert_match(/rake #{task_name}  # .../, out)43  end44  def test_display_tasks_with_very_long_task_name_to_a_non_tty_shows_name_and_comment45    @app.options.show_tasks = :tasks46    @app.options.show_task_pattern = //47    @app.tty_output = false48    description = "something short"49    task_name = "task name" * 8050    @app.last_description = "something short"51    @app.define_task(Rake::Task, task_name )52    out, = capture_io do @app.instance_eval { display_tasks_and_comments } end53    # Ensure the entire task name is output and we end up showing no description54    assert_match(/rake #{task_name}  # #{description}/, out)55  end56  def test_display_tasks_with_long_comments_to_a_non_tty_shows_entire_comment57    @app.options.show_tasks = :tasks58    @app.options.show_task_pattern = //59    @app.tty_output = false60    @app.last_description = "1234567890" * 861    @app.define_task(Rake::Task, "t")62    out, = capture_io do @app.instance_eval { display_tasks_and_comments } end63    assert_match(/^rake t/, out)64    assert_match(/# #{@app.last_description}/, out)65  end66  def test_display_tasks_with_long_comments_to_a_non_tty_with_columns_set_truncates_comments67    @app.terminal_columns = 8068    @app.options.show_tasks = :tasks69    @app.options.show_task_pattern = //70    @app.tty_output = false71    @app.last_description = "1234567890" * 872    @app.define_task(Rake::Task, "t")73    out, = capture_io do @app.instance_eval { display_tasks_and_comments } end74    assert_match(/^rake t/, out)75    assert_match(/# 12345678901234567890123456789012345678901234567890123456789012345\.\.\./, out)76  end77  def test_describe_tasks78    @app.options.show_tasks = :describe79    @app.options.show_task_pattern = //80    @app.last_description = "COMMENT"81    @app.define_task(Rake::Task, "t")82    out, = capture_io do @app.instance_eval { display_tasks_and_comments } end83    assert_match(/^rake t$/, out)84    assert_match(/^ {4}COMMENT$/, out)85  end86  def test_show_lines87    @app.options.show_tasks = :lines88    @app.options.show_task_pattern = //89    @app.last_description = "COMMENT"90    @app.define_task(Rake::Task, "t")91    @app['t'].locations << "HERE:1"92    out, = capture_io do @app.instance_eval { display_tasks_and_comments } end93    assert_match(/^rake t +[^:]+:\d+ *$/, out)94  end95  def test_finding_rakefile96    rakefile_default97    assert_match(/Rakefile/i, @app.instance_eval { have_rakefile })98  end99  def test_not_finding_rakefile100    @app.instance_eval { @rakefiles = ['NEVER_FOUND'] }101    assert( ! @app.instance_eval do have_rakefile end )102    assert_nil @app.rakefile103  end104  def test_load_rakefile105    rakefile_unittest106    @app.instance_eval do107      handle_options108      options.silent = true109      load_rakefile110    end111    assert_equal "rakefile", @app.rakefile.downcase112    assert_equal @tempdir, Dir.pwd113  end114  def test_load_rakefile_doesnt_print_rakefile_directory_from_same_dir115    rakefile_unittest116    _, err = capture_io do117      @app.instance_eval do118        # pretend we started from the unittest dir119        @original_dir = File.expand_path(".")120        raw_load_rakefile121      end122    end123    assert_empty err124  end125  def test_load_rakefile_from_subdir126    rakefile_unittest127    Dir.chdir 'subdir'128    @app.instance_eval do129      handle_options130      options.silent = true131      load_rakefile132    end133    assert_equal "rakefile", @app.rakefile.downcase134    assert_equal @tempdir, Dir.pwd135  end136  def test_load_rakefile_prints_rakefile_directory_from_subdir137    rakefile_unittest138    Dir.chdir 'subdir'139    app = Rake::Application.new140    app.options.rakelib = []141    _, err = capture_io do142      app.instance_eval do143        raw_load_rakefile144      end145    end146    assert_equal "(in #{@tempdir}\)\n", err147  end148  def test_load_rakefile_doesnt_print_rakefile_directory_from_subdir_if_silent149    rakefile_unittest150    Dir.chdir 'subdir'151    _, err = capture_io do152      @app.instance_eval do153        handle_options154        options.silent = true155        raw_load_rakefile156      end157    end158    assert_empty err159  end160  def test_load_rakefile_not_found161    Dir.chdir @tempdir162    ENV['RAKE_SYSTEM'] = 'not_exist'163    @app.instance_eval do164      handle_options165      options.silent = true166    end167    ex = assert_raises(RuntimeError) do168      @app.instance_eval do raw_load_rakefile end169    end170    assert_match(/no rakefile found/i, ex.message)171  end172  def test_load_from_system_rakefile173    rake_system_dir174    @app.instance_eval do175      handle_options176      options.silent = true177      options.load_system = true178      options.rakelib = []179      load_rakefile180    end181    assert_equal @system_dir, @app.system_dir182    assert_nil @app.rakefile183  rescue SystemExit184    flunk 'failed to load rakefile'185  end186  def test_load_from_calculated_system_rakefile187    rakefile_default188    def @app.standard_system_dir189      "__STD_SYS_DIR__"190    end191    ENV['RAKE_SYSTEM'] = nil192    @app.instance_eval do193      handle_options194      options.silent = true195      options.load_system = true196      options.rakelib = []197      load_rakefile198    end199    assert_equal "__STD_SYS_DIR__", @app.system_dir200  rescue SystemExit201    flunk 'failed to find system rakefile'202  end203  def test_terminal_columns204    old_RAKE_COLUMNS = ENV['RAKE_COLUMNS']205    ENV['RAKE_COLUMNS'] = '42'206    app = Rake::Application.new207    assert_equal 42, app.terminal_columns208  ensure209    if old_RAKE_COLUMNS then210      ENV['RAKE_COLUMNS'].delete211    else212      ENV['RAKE_COLUMNS'] = old_RAKE_COLUMNS213    end214  end215  def test_windows216    assert ! (@app.windows? && @app.unix?)217  end218  def test_loading_imports219    loader = util_loader220    @app.instance_eval do221      add_loader("dummy", loader)222      add_import("x.dummy")223      load_imports224    end225    # HACK no assertions226  end227  def test_building_imported_files_on_demand228    loader = util_loader229    @app.instance_eval do230      intern(Rake::Task, "x.dummy").enhance do loader.make_dummy end231      add_loader("dummy", loader)232      add_import("x.dummy")233      load_imports234    end235    # HACK no assertions236  end237  def test_handle_options_should_strip_options_from_ARGV238    assert !@app.options.trace239    valid_option = '--trace'240    ARGV.clear241    ARGV << valid_option242    @app.handle_options243    assert !ARGV.include?(valid_option)244    assert @app.options.trace245  end246  def test_good_run247    ran = false248    ARGV << '--rakelib=""'249    @app.options.silent = true250    @app.instance_eval do251      intern(Rake::Task, "default").enhance { ran = true }252    end253    rakefile_default254    out, err = capture_io do255      @app.run256    end257    assert ran258    assert_empty err259    assert_equal "DEFAULT\n", out260  end261  def test_display_task_run262    ran = false263    ARGV.clear264    ARGV << '-f' << '-s' << '--tasks' << '--rakelib=""'265    @app.last_description = "COMMENT"266    @app.define_task(Rake::Task, "default")267    out, = capture_io { @app.run }268    assert @app.options.show_tasks269    assert ! ran270    assert_match(/rake default/, out)271    assert_match(/# COMMENT/, out)272  end273  def test_display_prereqs274    ran = false275    ARGV.clear276    ARGV << '-f' << '-s' << '--prereqs' << '--rakelib=""'277    @app.last_description = "COMMENT"278    t = @app.define_task(Rake::Task, "default")279    t.enhance([:a, :b])280    @app.define_task(Rake::Task, "a")281    @app.define_task(Rake::Task, "b")282    out, = capture_io { @app.run }283    assert @app.options.show_prereqs284    assert ! ran285    assert_match(/rake a$/, out)286    assert_match(/rake b$/, out)287    assert_match(/rake default\n( *(a|b)\n){2}/m, out)288  end289  def test_bad_run290    @app.intern(Rake::Task, "default").enhance { fail }291    ARGV.clear292    ARGV << '-f' << '-s' <<  '--rakelib=""'293    assert_raises(SystemExit) {294      _, err = capture_io { @app.run }295      assert_match(/see full trace/, err)296    }297  ensure298    ARGV.clear299  end300  def test_bad_run_with_trace301    @app.intern(Rake::Task, "default").enhance { fail }302    ARGV.clear303    ARGV << '-f' << '-s' << '-t'304    assert_raises(SystemExit) {305      _, err = capture_io { @app.run }306      refute_match(/see full trace/, err)307    }308  ensure309    ARGV.clear310  end311  def test_run_with_bad_options312    @app.intern(Rake::Task, "default").enhance { fail }313    ARGV.clear314    ARGV << '-f' << '-s' << '--xyzzy'315    assert_raises(SystemExit) {316      capture_io { @app.run }317    }318  ensure319    ARGV.clear320  end321  def test_deprecation_message322    _, err = capture_io do323      @app.deprecate("a", "b", "c")324    end325    assert_match(/'a' is deprecated/i, err)326    assert_match(/use 'b' instead/i, err)327    assert_match(/at c$/i, err)328  end329  def test_standard_exception_handling_invalid_option330    out, err = capture_io do331      e = assert_raises SystemExit do332        @app.standard_exception_handling do333          raise OptionParser::InvalidOption, 'blah'334        end335      end336      assert_equal 1, e.status337    end338    assert_empty out339    assert_equal "invalid option: blah\n", err340  end341  def test_standard_exception_handling_other342    out, err = capture_io do343      e = assert_raises SystemExit do344        @app.standard_exception_handling do345          raise 'blah'346        end347      end348      assert_equal 1, e.status349    end350    assert_empty out351    assert_match "rake aborted!\n", err352    assert_match "blah\n", err353  end354  def test_standard_exception_handling_system_exit355    out, err = capture_io do356      e = assert_raises SystemExit do357        @app.standard_exception_handling do358          exit 0359        end360      end361      assert_equal 0, e.status362    end363    assert_empty out364    assert_empty err365  end366  def test_standard_exception_handling_system_exit_nonzero367    out, err = capture_io do368      e = assert_raises SystemExit do369        @app.standard_exception_handling do370          exit 5371        end372      end373      assert_equal 5, e.status374    end375    assert_empty out376    assert_empty err377  end378  def util_loader379    loader = Object.new380    loader.instance_variable_set :@load_called, false381    def loader.load arg...

capture_io

Using AI Code Generation

1    assert_output("Hello World2") { puts "Hello World" }3    assert_output(nil, "Hello World4") { warn "Hello World" }5    assert_output("Hello World6") { warn "Hello World"; puts "Hello World" }7    assert_output("Hello World8    assert_output("Hello World9    assert_output("Hello World10    assert_output("Hello World

capture_io

Using AI Code Generation

1    assert_equal("hello2", capture_io { puts "hello" })3    assert_equal("hello4", capture_io { $stderr.puts "hello" })5    assert_equal("hello6", capture_io { print "hello" })7    assert_equal("hello8", capture_io { $stderr.print "hello" })

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