Add tests for the info command

test/debug/info_test.rb

@@ -0,0 +1,67 @@
+# frozen_string_literal: true
+
+require_relative '../support/test_case'
+
+module DEBUGGER__
+  class BasicInfoTest < TestCase
+    def program
+      <<~RUBY
+     1| def foo
+     2|   @var = 10
+     3|   a = 1
+     4|   @var + 1
+     5| end
+     6|
+     7| foo
+      RUBY
+    end
+
+    def test_info_prints_locals_by_default
+      debug_code(program) do
+        type 'b 5'
+        type 'c'
+        type 'info'
+        assert_line_text(
+" %self => main\n" \
+" %return => 11\n" \
+" a => 1\n" \
+" @var => 10\n"
+        )
+        type 'q!'
+      end
+    end
+  end
+
+  class InfoThreadsTest < TestCase
+    def program
+      <<~RUBY
+       1| def foo
+       2|   Thread.new { sleep 30 }
+       3| end
+       4|
+       5| foo
+       6| "placeholder"
+      RUBY
+    end
+
+    def test_prints_current_thread
+      debug_code(program) do
+        type 'b 6'
+        type 'c'
+        type 'info threads'
+        assert_line_text(/#0 \(sleep\)@.*:6:in `<main>'/)
+        type 'q!'
+      end
+    end
+
+    def test_prints_the_other_thread
+      debug_code(program) do
+        type 'b 6'
+        type 'c'
+        type 'info threads'
+        assert_line_text(/#1 \(sleep\)@.*:2 sleep_forever/)
+        type 'q!'
+      end
+    end
+  end
+end