Start testing the command line interface

lib/youplot/command.rb

@@ -13,14 +13,15 @@ module YouPlot
     attr_accessor :params
     attr_reader :data, :fmt, :parser
 
-    def initialize
+    def initialize(argv = ARGV)
+      @argv    = argv
       @params  = Params.new
       @parser  = Parser.new
       @backend = YouPlot::Backends::UnicodePlotBackend
     end
 
     def run
-      parser.parse_options
+      parser.parse_options(@argv)
       command   = parser.command
       params    = parser.params
       delimiter = parser.delimiter
@@ -62,7 +63,8 @@ module YouPlot
                  raise "unrecognized plot_type: #{command}"
                end
 
-        if output.is_a?(IO)
+        case output
+        when IO
           plot.render(output)
         else
           File.open(output, 'w') do |f|
@@ -70,9 +72,11 @@ module YouPlot
           end
         end
 
-        if pass.is_a?(IO)
-          print input
-        elsif pass
+        case pass
+        when IO
+          pass.print(input)
+        else
+          if pass
             File.open(pass, 'w') do |f|
               f.print(input)
             end
@@ -81,3 +85,4 @@ module YouPlot
       end
     end
   end
+end

test/fixtures/iris-scatter.txt

@@ -0,0 +1,20 @@
+                         IRIS
+       ┌────────────────────────────────────────┐             
+   6.9 │⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠄⠃⠀⠀│ sepal_width 
+       │⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⡀⠀⠀⠀⠀⠀⠀⠀⠀⡄⠂⠄⠀⠀⠄⠀⠁│ petal_length
+       │⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⢀⠀⠀⡀⡀⠂⠀⡆⠁⠄⠈⠀⠂⠀⠀⠀⠀⠀⠀⠀│ petal_width 
+       │⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⡀⡀⡀⠀⠂⡀⠃⡅⠀⠄⠁⡂⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀│ species     
+       │⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠐⠀⠁⠀⠄⢕⠀⠄⡃⠀⠀⠀⡁⠄⠂⡀⠀⠀⠀⠀⠀⠀⠀⠀⠀│             
+       │⠀⠀⠀⠀⠀⠀⠀⠀⠀⠁⠀⠀⠀⠀⠁⣊⠀⡃⠀⡀⠉⠀⠅⠂⠅⠙⠀⠂⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀│             
+       │⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⢠⠀⢅⠀⡄⡮⠀⠅⠇⠀⠒⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠄⠀⠄│             
+       │⠀⠀⠀⠀⠀⠨⠀⠠⠀⡀⣷⠀⠆⠀⠄⠊⠀⠂⠀⠀⠄⠀⠄⡄⠀⠀⠀⡀⠀⠀⠀⠀⠁⠀⠀⠀⠀⠀⠀⠀│             
+       │⠀⠀⠐⠀⠇⠘⠀⠑⠀⠂⠓⠀⠀⠀⠂⢰⠀⡆⡀⠃⢶⠀⡄⡄⡇⡳⠀⠂⡃⠃⠑⠀⠃⠄⡀⠀⠂⡂⠀⠀│             
+       │⠀⠀⠀⠀⠀⠀⠀⠀⠀⡄⠠⠀⠁⠀⠀⡮⠀⠆⡃⠀⠑⠀⠀⡅⠁⠀⠀⡄⠀⠀⠀⠀⠄⠀⠀⠀⠀⠂⠀⠀│             
+       │⠀⠀⠀⠀⠀⠁⠀⢀⠀⠀⢅⠀⠀⠀⠀⠡⠀⠄⡀⠀⠁⠀⠁⡁⡃⠅⠀⠃⠃⠃⠐⠀⠀⠀⡀⠀⠂⠅⠀⠄│             
+       │⠀⠀⠀⠀⡀⢠⠀⢤⠀⡆⣴⠀⡤⠀⠆⡠⠀⠆⠀⠅⢍⠀⠅⠅⠅⢅⠀⡇⡀⠄⡀⠀⠅⠁⠀⠀⠀⠀⠀⠀│             
+       │⠀⠀⠠⠀⠁⢁⠀⠁⠀⡀⡣⠀⠀⠀⠁⡯⠀⡃⡂⠀⡘⠀⠁⠁⠁⠈⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀│             
+       │⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⢄⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀│             
+     0 │⠀⠀⢀⠀⡄⣲⠀⣴⠀⡄⣿⠀⣤⠀⡅⣄⠀⡃⡄⡀⣀⠀⡀⡀⡀⣀⠀⡀⡀⡀⣀⠀⡀⡀⡀⠀⡀⡀⠀⡀│             
+       └────────────────────────────────────────┘             
+       4                                        8
+                     sepal_length

test/uplot/command_test.rb

@@ -1,6 +1,23 @@
 # frozen_string_literal: true
 
+require "tempfile"
 require_relative '../test_helper'
 
 class YouPlotCommandTest < Test::Unit::TestCase
+  def setup
+    @ta = "ta"
+    @stdin = $stdin.dup
+    @stderr = $stderr.dup
+  end
+
+  test :scatter do
+    $stdin  = File.open(File.expand_path("../fixtures/iris.csv", __dir__), "r")
+    Tempfile.new("iris-scatter") do |tmp_file|
+      $stderr = tmp_file
+      YouPlot::Command.new(["scatter", "-H", "-d,", "-t", "IRIS"]).run
+      assert_equal File.read(File.expand_path("../fixtures/iris-scatter.txt", __dir__)), tmp_file.read
+    end
+    $stdin = @stdin
+    $stderr = @stderr
+  end
 end