Introduce io_result wrapper for passing `[-errno, size]` in VALUE.

1 files changed, 114 insertions, 0 deletions

diff --git a/test/fiber/test_io_buffer.rb b/test/fiber/test_io_buffer.rb
new file mode 100644
index 0000000000..e48764242f
--- /dev/null
+++ b/test/fiber/test_io_buffer.rb
@@ -0,0 +1,114 @@
+# frozen_string_literal: true
+require 'test/unit'
+require_relative 'scheduler'
+
+require 'timeout'
+
+class TestFiberIOBuffer < Test::Unit::TestCase
+  MESSAGE = "Hello World"
+
+  def test_read_write_blocking
+    skip "UNIXSocket is not defined!" unless defined?(UNIXSocket)
+
+    i, o = UNIXSocket.pair
+    i.nonblock = false
+    o.nonblock = false
+
+    message = nil
+
+    thread = Thread.new do
+      scheduler = IOBufferScheduler.new
+      Fiber.set_scheduler scheduler
+
+      Fiber.schedule do
+        message = i.read(20)
+        i.close
+      end
+
+      Fiber.schedule do
+        o.write(MESSAGE)
+        o.close
+      end
+    end
+
+    thread.join
+
+    assert_equal MESSAGE, message
+    assert_predicate(i, :closed?)
+    assert_predicate(o, :closed?)
+  end
+
+  def test_timeout_after
+    skip "UNIXSocket is not defined!" unless defined?(UNIXSocket)
+
+    i, o = UNIXSocket.pair
+    i.nonblock = false
+    o.nonblock = false
+
+    message = nil
+    error = nil
+
+    thread = Thread.new do
+      scheduler = IOBufferScheduler.new
+      Fiber.set_scheduler scheduler
+
+      Fiber.schedule do
+        Timeout.timeout(0.1) do
+          message = i.read(20)
+        end
+      rescue Timeout::Error => error
+        # Assertions below.
+      ensure
+        i.close
+      end
+    end
+
+    thread.join
+
+    assert_nil message
+    assert_kind_of Timeout::Error, error
+  end
+
+  def test_read_nonblock
+    skip "UNIXSocket is not defined!" unless defined?(UNIXSocket)
+
+    i, o = UNIXSocket.pair
+
+    message = nil
+
+    thread = Thread.new do
+      scheduler = IOBufferScheduler.new
+      Fiber.set_scheduler scheduler
+
+      Fiber.schedule do
+        message = i.read_nonblock(20, exception: false)
+        i.close
+      end
+    end
+
+    thread.join
+
+    assert_equal :wait_readable, message
+    o.close
+  end
+
+  def test_write_nonblock
+    skip "UNIXSocket is not defined!" unless defined?(UNIXSocket)
+
+    i, o = UNIXSocket.pair
+
+    thread = Thread.new do
+      scheduler = IOBufferScheduler.new
+      Fiber.set_scheduler scheduler
+
+      Fiber.schedule do
+        o.write_nonblock(MESSAGE, exception: false)
+        o.close
+      end
+    end
+
+    thread.join
+
+    assert_equal MESSAGE, i.read
+  end
+end