1 files changed, 72 insertions, 0 deletions
diff --git a/spec/ruby/core/thread/priority_spec.rb b/spec/ruby/core/thread/priority_spec.rb
new file mode 100644
index 0000000000..e13ad478b5
--- /dev/null
+++ b/spec/ruby/core/thread/priority_spec.rb
@@ -0,0 +1,72 @@
+require_relative '../../spec_helper'
+require_relative 'fixtures/classes'
+
+describe "Thread#priority" do
+  before :each do
+    @current_priority = Thread.current.priority
+    ThreadSpecs.clear_state
+    @thread = Thread.new { Thread.pass until ThreadSpecs.state == :exit }
+    Thread.pass until @thread.alive?
+  end
+
+  after :each do
+    ThreadSpecs.state = :exit
+    @thread.join
+  end
+
+  it "inherits the priority of the current thread while running" do
+    @thread.alive?.should be_true
+    @thread.priority.should == @current_priority
+  end
+
+  it "maintain the priority of the current thread after death" do
+    ThreadSpecs.state = :exit
+    @thread.join
+    @thread.alive?.should be_false
+    @thread.priority.should == @current_priority
+  end
+
+  it "returns an integer" do
+    @thread.priority.should be_kind_of(Integer)
+  end
+end
+
+describe "Thread#priority=" do
+  before :each do
+    ThreadSpecs.clear_state
+    @thread = Thread.new { Thread.pass until ThreadSpecs.state == :exit }
+    Thread.pass until @thread.alive?
+  end
+
+  after :each do
+    ThreadSpecs.state = :exit
+    @thread.join
+  end
+
+  describe "when set with an integer" do
+    it "returns an integer" do
+      value = (@thread.priority = 3)
+      value.should == 3
+    end
+
+    it "clamps the priority to -3..3" do
+      @thread.priority = 42
+      @thread.priority.should == 3
+      @thread.priority = -42
+      @thread.priority.should == -3
+    end
+  end
+
+  describe "when set with a non-integer" do
+    it "raises a type error" do
+      ->{ @thread.priority = Object.new }.should raise_error(TypeError)
+    end
+  end
+
+  it "sets priority even when the thread has died" do
+    thread = Thread.new {}
+    thread.join
+    thread.priority = 3
+    thread.priority.should == 3
+  end
+end