Merge remote-tracking branch 'upstream/v1.0.x' into HEAD

1 files changed, 144 insertions, 0 deletions

diff --git a/src/ruby/spec/generic/rpc_server_pool_spec.rb b/src/ruby/spec/generic/rpc_server_pool_spec.rb
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+# Copyright 2015, Google Inc.
+# All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are
+# met:
+#
+#     * Redistributions of source code must retain the above copyright
+# notice, this list of conditions and the following disclaimer.
+#     * Redistributions in binary form must reproduce the above
+# copyright notice, this list of conditions and the following disclaimer
+# in the documentation and/or other materials provided with the
+# distribution.
+#     * Neither the name of Google Inc. nor the names of its
+# contributors may be used to endorse or promote products derived from
+# this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+require 'grpc'
+
+Thread.abort_on_exception = true
+
+describe GRPC::Pool do
+  Pool = GRPC::Pool
+
+  describe '#new' do
+    it 'raises if a non-positive size is used' do
+      expect { Pool.new(0) }.to raise_error
+      expect { Pool.new(-1) }.to raise_error
+      expect { Pool.new(Object.new) }.to raise_error
+    end
+
+    it 'is constructed OK with a positive size' do
+      expect { Pool.new(1) }.not_to raise_error
+    end
+  end
+
+  describe '#ready_for_work?' do
+    it 'before start it is not ready' do
+      p = Pool.new(1)
+      expect(p.ready_for_work?).to be(false)
+    end
+
+    it 'it stops being ready after all workers jobs waiting or running' do
+      p = Pool.new(5)
+      p.start
+      job = proc { sleep(3) } # sleep so workers busy when done scheduling
+      5.times do
+        expect(p.ready_for_work?).to be(true)
+        p.schedule(&job)
+      end
+      expect(p.ready_for_work?).to be(false)
+    end
+
+    it 'it becomes ready again after jobs complete' do
+      p = Pool.new(5)
+      p.start
+      job = proc {}
+      5.times do
+        expect(p.ready_for_work?).to be(true)
+        p.schedule(&job)
+      end
+      expect(p.ready_for_work?).to be(false)
+      sleep 5 # give the pool time do get at least one task done
+      expect(p.ready_for_work?).to be(true)
+    end
+  end
+
+  describe '#schedule' do
+    it 'return if the pool is already stopped' do
+      p = Pool.new(1)
+      p.stop
+      job = proc {}
+      expect { p.schedule(&job) }.to_not raise_error
+    end
+
+    it 'adds jobs that get run by the pool' do
+      p = Pool.new(1)
+      p.start
+      o, q = Object.new, Queue.new
+      job = proc { q.push(o) }
+      p.schedule(&job)
+      expect(q.pop).to be(o)
+      p.stop
+    end
+
+    it 'it throws an error if all of the workers have tasks to do' do
+      p = Pool.new(5)
+      p.start
+      job = proc {}
+      5.times do
+        expect(p.ready_for_work?).to be(true)
+        p.schedule(&job)
+      end
+      expect { p.schedule(&job) }.to raise_error
+      expect { p.schedule(&job) }.to raise_error
+    end
+  end
+
+  describe '#stop' do
+    it 'works when there are no scheduled tasks' do
+      p = Pool.new(1)
+      expect { p.stop }.not_to raise_error
+    end
+
+    it 'stops jobs when there are long running jobs' do
+      p = Pool.new(1)
+      p.start
+      o, q = Object.new, Queue.new
+      job = proc do
+        sleep(5)  # long running
+        q.push(o)
+      end
+      p.schedule(&job)
+      sleep(1)  # should ensure the long job gets scheduled
+      expect { p.stop }.not_to raise_error
+    end
+  end
+
+  describe '#start' do
+    it 'runs jobs as they are scheduled' do
+      p = Pool.new(5)
+      o, q = Object.new, Queue.new
+      p.start
+      n = 5  # arbitrary
+      n.times do
+        p.schedule(o, &q.method(:push))
+        expect(q.pop).to be(o)
+      end
+      p.stop
+    end
+  end
+end