From ecb7aa4876788481193b86f31c42d7f86f230bc0 Mon Sep 17 00:00:00 2001
From: Hiroyuki Mishima <51609+misshie@users.noreply.github.com>
Date: Fri, 9 May 2025 13:47:22 +0900
Subject: [PATCH] Make 2nd arguments of IGV#color_by and IGV#group optional
 (default=nil)

---
 lib/igv.rb       | 4 ++--
 test/igv_test.rb | 4 ++++
 2 files changed, 6 insertions(+), 2 deletions(-)

diff --git a/lib/igv.rb b/lib/igv.rb
index 29efd62..a6e26ae 100644
--- a/lib/igv.rb
+++ b/lib/igv.rb
@@ -559,7 +559,7 @@ def max_panel_height(height)
   # @example
   #   igv.color_by("SAMPLE")
   #   igv.color_by("TAG", "NM")
-  def color_by(option, tag)
+  def color_by(option, tag = nil)
     send :colorBy, option, tag
   end
 
@@ -572,7 +572,7 @@ def color_by(option, tag)
   # @example
   #   igv.group("SAMPLE")
   #   igv.group("TAG", "NM")
-  def group(option, tag)
+  def group(option, tag = nil)
     send :group, option, tag
   end
 
diff --git a/test/igv_test.rb b/test/igv_test.rb
index d9c9562..90ec267 100644
--- a/test/igv_test.rb
+++ b/test/igv_test.rb
@@ -26,6 +26,10 @@ def test_igv
     assert_equal 'OK', @igv.goto('chr2')
     assert_equal 'OK', @igv.snapshot('test.png')
     assert_true File.exist?(File.expand_path('fixtures/test.png', __dir__))
+    assert_equal 'OK', @igv.color_by('READ_STRAND', nil)
+    assert_equal 'OK', @igv.color_by('READ_STRAND')
+    assert_equal 'OK', @igv.group('NONE', nil)
+    assert_equal 'OK', @igv.group('NONE')          
   end
 
   def teardown