Changes the default value to stdout if no argument is specified with the -o option

#9

lib/youplot/command/parser.rb

@@ -35,12 +35,13 @@ module YouPlot
           opt.on_tail('') # Add a blank line at the end
           opt.separator('')
           opt.on('Common options:')
-          opt.on('-O', '--pass [VAL]', 'file to output standard input data to [stdout]',
+          opt.on('-O', '--pass [FILE]', 'file to output input data to [stdout]',
                  'for inserting YouPlot in the middle of Unix pipes') do |v|
             @options[:pass] = v || $stdout
           end
-          opt.on('-o', '--output VAL', 'file to output results to [stderr]') do |v|
+          opt.on('-o', '--output [FILE]', 'file to output plots to [stdout]',
-            @options[:output] = v
+                 'If no option is specified, plot will print to stderr') do |v|
+            @options[:output] = v || $stdout
           end
           opt.on('-d', '--delimiter VAL', String, 'use DELIM instead of TAB for field delimiter') do |v|
             @options[:delimiter] = v

test/youplot/command_test.rb

@@ -7,23 +7,27 @@ class YouPlotCommandTest < Test::Unit::TestCase
   class << self
     def startup
       @stdin  = $stdin.dup
+      @stdout = $stdout.dup
       @stderr = $stderr.dup
     end
 
     def shutdown
       $stdin  = @stdin
+      $stdout = @stdout
       $stderr = @stderr
     end
   end
 
   def setup
     $stdin = File.open(File.expand_path('../fixtures/iris.csv', __dir__), 'r')
-    @tmp_file = Tempfile.new
+    @stderr_file = Tempfile.new
-    $stderr = @tmp_file
+    @stdout_file = Tempfile.new
+    $stderr = @stderr_file
+    $stdout = @stdout_file
   end
 
   def teardown
-    @tmp_file.close
+    @stderr_file.close
   end
 
   def fixture(fname)
@@ -32,71 +36,82 @@ class YouPlotCommandTest < Test::Unit::TestCase
 
   test :bar do
     YouPlot::Command.new(['bar', '-H', '-d,', '-t', 'IRIS-BARPLOT']).run
-    assert_equal fixture('iris-barplot.txt'), @tmp_file.read
+    assert_equal fixture('iris-barplot.txt'), @stderr_file.read
   end
 
   test :barplot do
     YouPlot::Command.new(['barplot', '-H', '-d,', '-t', 'IRIS-BARPLOT']).run
-    assert_equal fixture('iris-barplot.txt'), @tmp_file.read
+    assert_equal fixture('iris-barplot.txt'), @stderr_file.read
   end
 
   test :hist do
     YouPlot::Command.new(['hist', '-H', '-d,', '-t', 'IRIS-HISTOGRAM']).run
-    assert_equal fixture('iris-histogram.txt'), @tmp_file.read
+    assert_equal fixture('iris-histogram.txt'), @stderr_file.read
   end
 
   test :histogram do
     YouPlot::Command.new(['histogram', '-H', '-d,', '-t', 'IRIS-HISTOGRAM']).run
-    assert_equal fixture('iris-histogram.txt'), @tmp_file.read
+    assert_equal fixture('iris-histogram.txt'), @stderr_file.read
   end
 
   test :line do
     YouPlot::Command.new(['line', '-H', '-d,', '-t', 'IRIS-LINEPLOT']).run
-    assert_equal fixture('iris-lineplot.txt'), @tmp_file.read
+    assert_equal fixture('iris-lineplot.txt'), @stderr_file.read
   end
 
   test :lineplot do
     YouPlot::Command.new(['lineplot', '-H', '-d,', '-t', 'IRIS-LINEPLOT']).run
-    assert_equal fixture('iris-lineplot.txt'), @tmp_file.read
+    assert_equal fixture('iris-lineplot.txt'), @stderr_file.read
   end
 
   test :lines do
     YouPlot::Command.new(['lines', '-H', '-d,', '-t', 'IRIS-LINEPLOTS']).run
-    assert_equal fixture('iris-lineplots.txt'), @tmp_file.read
+    assert_equal fixture('iris-lineplots.txt'), @stderr_file.read
   end
 
   test :lineplots do
     YouPlot::Command.new(['lineplots', '-H', '-d,', '-t', 'IRIS-LINEPLOTS']).run
-    assert_equal fixture('iris-lineplots.txt'), @tmp_file.read
+    assert_equal fixture('iris-lineplots.txt'), @stderr_file.read
   end
 
   test :s do
     YouPlot::Command.new(['s', '-H', '-d,', '-t', 'IRIS-SCATTER']).run
-    assert_equal fixture('iris-scatter.txt'), @tmp_file.read
+    assert_equal fixture('iris-scatter.txt'), @stderr_file.read
   end
 
   test :scatter do
     YouPlot::Command.new(['scatter', '-H', '-d,', '-t', 'IRIS-SCATTER']).run
-    assert_equal fixture('iris-scatter.txt'), @tmp_file.read
+    assert_equal fixture('iris-scatter.txt'), @stderr_file.read
   end
 
   test :d do
     YouPlot::Command.new(['d', '-H', '-d,', '-t', 'IRIS-DENSITY']).run
-    assert_equal fixture('iris-density.txt'), @tmp_file.read
+    assert_equal fixture('iris-density.txt'), @stderr_file.read
   end
 
   test :density do
     YouPlot::Command.new(['density', '-H', '-d,', '-t', 'IRIS-DENSITY']).run
-    assert_equal fixture('iris-density.txt'), @tmp_file.read
+    assert_equal fixture('iris-density.txt'), @stderr_file.read
   end
 
   test :box do
     YouPlot::Command.new(['box', '-H', '-d,', '-t', 'IRIS-BOXPLOT']).run
-    assert_equal fixture('iris-boxplot.txt'), @tmp_file.read
+    assert_equal fixture('iris-boxplot.txt'), @stderr_file.read
   end
 
   test :boxplot do
     YouPlot::Command.new(['boxplot', '-H', '-d,', '-t', 'IRIS-BOXPLOT']).run
-    assert_equal fixture('iris-boxplot.txt'), @tmp_file.read
+    assert_equal fixture('iris-boxplot.txt'), @stderr_file.read
+  end
+
+  test :plot_output_stdout do
+    YouPlot::Command.new(['bar', '-o', '-H', '-d,', '-t', 'IRIS-BARPLOT']).run
+    assert_equal "", @stderr_file.read
+  end
+
+  test :data_output_stdout do
+    YouPlot::Command.new(['bar', '-O', '-H', '-d,', '-t', 'IRIS-BARPLOT']).run
+    assert_equal fixture('iris-barplot.txt'), @stderr_file.read
+    assert_equal File.read(File.expand_path('../fixtures/iris.csv', __dir__)), @stdout_file.read
   end
 end