1 files changed, 84 insertions, 0 deletions
diff --git a/spec/ruby/core/kernel/backtick_spec.rb b/spec/ruby/core/kernel/backtick_spec.rb
new file mode 100644
index 0000000000..834d5636c1
--- /dev/null
+++ b/spec/ruby/core/kernel/backtick_spec.rb
@@ -0,0 +1,84 @@
+require_relative '../../spec_helper'
+require_relative 'fixtures/classes'
+
+describe "Kernel#`" do
+  before :each do
+    @original_external = Encoding.default_external
+  end
+
+  after :each do
+    Encoding.default_external = @original_external
+  end
+
+  it "is a private method" do
+    Kernel.should have_private_instance_method(:`)
+  end
+
+  it "returns the standard output of the executed sub-process" do
+    ip = 'world'
+    `echo disc #{ip}`.should == "disc world\n"
+  end
+
+  it "lets the standard error stream pass through to the inherited stderr" do
+    cmd = ruby_cmd('STDERR.print "error stream"')
+    -> {
+      `#{cmd}`.should == ""
+    }.should output_to_fd("error stream", STDERR)
+  end
+
+  it "produces a String in the default external encoding" do
+    Encoding.default_external = Encoding::SHIFT_JIS
+    `echo disc`.encoding.should equal(Encoding::SHIFT_JIS)
+  end
+
+  it "raises an Errno::ENOENT if the command is not executable" do
+    -> { `nonexistent_command` }.should raise_error(Errno::ENOENT)
+  end
+
+  platform_is_not :windows do
+    it "handles invalid UTF-8 bytes in command" do
+      `echo "testing\xC2 a non UTF-8 string"`.b.should == "testing\xC2 a non UTF-8 string\n".b
+    end
+
+    it "sets $? to the exit status of the executed sub-process" do
+      ip = 'world'
+      `echo disc #{ip}`
+      $?.should be_kind_of(Process::Status)
+      $?.should_not.stopped?
+      $?.should.exited?
+      $?.exitstatus.should == 0
+      $?.should.success?
+      `echo disc #{ip}; exit 99`
+      $?.should be_kind_of(Process::Status)
+      $?.should_not.stopped?
+      $?.should.exited?
+      $?.exitstatus.should == 99
+      $?.should_not.success?
+    end
+  end
+
+  platform_is :windows do
+    it "sets $? to the exit status of the executed sub-process" do
+      ip = 'world'
+      `echo disc #{ip}`
+      $?.should be_kind_of(Process::Status)
+      $?.should_not.stopped?
+      $?.should.exited?
+      $?.exitstatus.should == 0
+      $?.should.success?
+      `echo disc #{ip}& exit 99`
+      $?.should be_kind_of(Process::Status)
+      $?.should_not.stopped?
+      $?.should.exited?
+      $?.exitstatus.should == 99
+      $?.should_not.success?
+    end
+  end
+end
+
+describe "Kernel.`" do
+  it "tries to convert the given argument to String using #to_str" do
+    (obj = mock('echo test')).should_receive(:to_str).and_return("echo test")
+    Kernel.`(obj).should == "test\n"  #` fix vim syntax highlighting
+  end
+end