1 files changed, 89 insertions, 0 deletions
diff --git a/spec/ruby/core/exception/system_call_error_spec.rb b/spec/ruby/core/exception/system_call_error_spec.rb
new file mode 100644
index 0000000000..edcc8d3734
--- /dev/null
+++ b/spec/ruby/core/exception/system_call_error_spec.rb
@@ -0,0 +1,89 @@
+require File.expand_path('../../../spec_helper', __FILE__)
+require File.expand_path('../fixtures/common', __FILE__)
+
+describe "SystemCallError" do
+  before :each do
+    ScratchPad.clear
+  end
+
+  it "can be subclassed" do
+    ExceptionSpecs::SCESub = Class.new(SystemCallError) do
+      def initialize
+        ScratchPad.record :initialize
+      end
+    end
+
+    exc = ExceptionSpecs::SCESub.new
+    ScratchPad.recorded.should equal(:initialize)
+    exc.should be_an_instance_of(ExceptionSpecs::SCESub)
+  end
+end
+
+describe "SystemCallError.new" do
+  it "requires at least one argument" do
+    lambda { SystemCallError.new }.should raise_error(ArgumentError)
+  end
+
+  it "accepts single Fixnum argument as errno" do
+    SystemCallError.new(-2**24).errno.should == -2**24
+    SystemCallError.new(42).errno.should == 42
+    SystemCallError.new(2**24).errno.should == 2**24
+  end
+
+  it "constructs the appropriate Errno class" do
+    # EINVAL should be more or less mortable across the platforms,
+    # so let's use it then.
+    SystemCallError.new(22).should be_kind_of(SystemCallError)
+    SystemCallError.new(22).should be_an_instance_of(Errno::EINVAL)
+    SystemCallError.new(2**28).should be_an_instance_of(SystemCallError)
+  end
+
+  it "accepts an optional custom message preceding the errno" do
+    exc = SystemCallError.new("custom message", 22)
+    exc.should be_an_instance_of(Errno::EINVAL)
+    exc.errno.should == 22
+    exc.message.should == "Invalid argument - custom message"
+  end
+
+  it "accepts an optional third argument specifying the location" do
+    exc = SystemCallError.new("custom message", 22, "location")
+    exc.should be_an_instance_of(Errno::EINVAL)
+    exc.errno.should == 22
+    exc.message.should == "Invalid argument @ location - custom message"
+  end
+
+  it "returns an arity of -1 for the initialize method" do
+    SystemCallError.instance_method(:initialize).arity.should == -1
+  end
+end
+
+describe "SystemCallError#errno" do
+  it "returns nil when no errno given" do
+    SystemCallError.new("message").errno.should == nil
+  end
+
+  it "returns the errno given as optional argument to new" do
+    SystemCallError.new("message", -2**20).errno.should == -2**20
+    SystemCallError.new("message", -1).errno.should == -1
+    SystemCallError.new("message", 0).errno.should == 0
+    SystemCallError.new("message", 1).errno.should == 1
+    SystemCallError.new("message", 42).errno.should == 42
+    SystemCallError.new("message", 2**20).errno.should == 2**20
+  end
+end
+
+describe "SystemCallError#message" do
+  it "returns the default message when no message is given" do
+    platform_is :aix do
+      SystemCallError.new(2**28).message.should =~ /Error .*occurred/i
+    end
+    platform_is_not :aix do
+      SystemCallError.new(2**28).message.should =~ /Unknown error/i
+    end
+  end
+
+  it "returns the message given as an argument to new" do
+    SystemCallError.new("message", 1).message.should =~ /message/
+    SystemCallError.new("XXX").message.should =~ /XXX/
+  end
+end