From 33ec37b141e896b47ed642923fd33b0c658ae9fb Mon Sep 17 00:00:00 2001
From: Amir Rajan <ar@amirrajan.net>
Date: Fri, 11 Sep 2020 02:02:01 -0500
Subject: synced samples

---
 .../01_trace_debugging/app/main.rb                 | 53 ++++++++++++++++++++++
 1 file changed, 53 insertions(+)
 create mode 100644 samples/10_advanced_debugging/01_trace_debugging/app/main.rb

(limited to 'samples/10_advanced_debugging/01_trace_debugging/app')

diff --git a/samples/10_advanced_debugging/01_trace_debugging/app/main.rb b/samples/10_advanced_debugging/01_trace_debugging/app/main.rb
new file mode 100644
index 0000000..33f15b3
--- /dev/null
+++ b/samples/10_advanced_debugging/01_trace_debugging/app/main.rb
@@ -0,0 +1,53 @@
+class Game
+  attr_gtk
+
+  def method1 num
+    method2 num
+  end
+
+  def method2 num
+    method3 num
+  end
+
+  def method3 num
+    method4 num
+  end
+
+  def method4 num
+    if num == 1
+      puts "UNLUCKY #{num}."
+      state.unlucky_count += 1
+      if state.unlucky_count > 3
+        raise "NAT 1 finally occurred. Check app/trace.txt for all method invocation history."
+      end
+    else
+      puts "LUCKY #{num}."
+    end
+  end
+
+  def tick
+    state.roll_history ||= []
+    state.roll_history << rand(20) + 1
+    state.countdown ||= 600
+    state.countdown  -= 1
+    state.unlucky_count ||= 0
+    outputs.labels << [640, 360, "A dice roll of 1 will cause an exception.", 0, 1]
+    if state.countdown > 0
+      outputs.labels << [640, 340, "Dice roll countdown: #{state.countdown}", 0, 1]
+    else
+      state.attempts ||= 0
+      state.attempts  += 1
+      outputs.labels << [640, 340, "ROLLING! #{state.attempts}", 0, 1]
+    end
+    return if state.countdown > 0
+    method1 state.roll_history[-1]
+  end
+end
+
+$game = Game.new
+
+def tick args
+  trace! $game # <------------------- TRACING ENABLED FOR THIS OBJECT
+  $game.args = args
+  $game.tick
+end
-- 
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