Add whereami test

Author: st0012

test/console/whereami_test.rb

@@ -0,0 +1,58 @@
+# frozen_string_literal: true
+
+require_relative '../support/console_test_case'
+
+module DEBUGGER__
+  class WhereamiTest < ConsoleTestCase
+    def program
+      <<~RUBY
+         1| a = 1
+         2| a = 1
+         3| a = 1
+         4| a = 1
+         5| a = 1
+         6| a = 1
+         7| a = 1
+         8| a = 1
+         9| a = 1
+        10| a = 1
+        11| b = 1
+        12| b = 1
+        13| b = 1
+        14| b = 1
+        15| b = 1
+        16| b = 1
+        17| b = 1
+        18| b = 1
+        19| b = 1
+        20| b = 1
+        21| c = 1
+      RUBY
+    end
+
+    def test_whereami_displays_current_frames_code
+      debug_code(program) do
+        type "list"
+        type "list"
+
+        # after 2 list commands, we should advance to the next 10 lines and not able to see the current frame's source
+        assert_no_line_text(/=>   1\| a = 1/)
+        assert_line_text(/b = 1/)
+
+        type "whereami"
+
+        # with whereami, we should see the current frame's source but have no visual outside the closest 10 lines
+        assert_no_line_text(/b = 1/)
+        assert_line_text(/=>   1\| a = 1/)
+
+        type "list"
+
+        # list command should work as normal after whereami is executed
+        assert_no_line_text(/b = 1/)
+        assert_line_text(/c = 1/)
+
+        type "continue"
+      end
+    end
+  end
+end