diff --git a/zig-impl/crystal/some-crystal-app/src/test-app.cr b/zig-impl/crystal/some-crystal-app/src/test-app.cr
new file mode 100644
index 0000000..400fe16
--- /dev/null
+++ b/zig-impl/crystal/some-crystal-app/src/test-app.cr
@@ -0,0 +1,46 @@
+require "./some-crystal-app.cr"
+
+def test_high_level
+	ipc = IPC.new
+	fd = ipc.connect("pong")
+	ipc.write(fd, "hello this is some value")
+	event = ipc.wait()
+
+	m = event.message
+	if m.nil?
+		puts "No message"
+	else
+		pp! String.new(m.to_unsafe, m.size)
+	end
+end
+
+def test_loop
+	ipc = IPC.new
+	fd = ipc.connect("pong")
+	ipc.schedule(fd, "hello this is some value")
+	ipc.loop do |event|
+		case event.type
+		when LibIPC::EventType::MessageRx
+			m = event.message
+			if m.nil?
+				puts "No message"
+			else
+				pp! String.new(m.to_unsafe, m.size)
+			end
+			exit 0
+		when LibIPC::EventType::MessageTx
+			puts "A message has been sent"
+		else
+			puts "Unexpected: #{event.type}"
+			exit 1
+		end
+	end
+end
+
+# TODO: Write documentation for `Some::Crystal::App`
+module Some::Crystal::App
+	VERSION = "0.1.0"
+
+	test_high_level
+	test_loop
+end