Use #inspect to show the exitstatus even if it is nil

Author: eregon

lib/mspec/helpers/ruby_exe.rb

@@ -144,7 +144,7 @@ def ruby_exe(code = :not_given, opts = {})
 
       last_status = Process.last_status
       if last_status.exitstatus != expected_exit_status
-        raise "Expected exit status is #{expected_exit_status} but actual is #{last_status.exitstatus}. Command ruby_exe(#{command})"
+        raise "Expected exit status is #{expected_exit_status.inspect} but actual is #{last_status.exitstatus.inspect} for command ruby_exe(#{command.inspect})"
       end
 
       output

spec/helpers/ruby_exe_spec.rb

@@ -181,7 +181,19 @@ class RubyExeSpecs
 
     expect {
       @script.ruby_exe(code, options)
-    }.to raise_error(%r{Expected exit status is 0 but actual is 4. Command ruby_exe\(.+\)})
+    }.to raise_error(%r{Expected exit status is 0 but actual is 4 for command ruby_exe\(.+\)})
+  end
+
+  it "shows in the exception message if exitstatus is nil (e.g., signal)" do
+    code = "code"
+    options = {}
+
+    status_failed = double(Process::Status, exitstatus: nil)
+    allow(Process).to receive(:last_status).and_return(status_failed)
+
+    expect {
+      @script.ruby_exe(code, options)
+    }.to raise_error(%r{Expected exit status is 0 but actual is nil for command ruby_exe\(.+\)})
   end
 
   describe "with :dir option" do
@@ -231,7 +243,7 @@ class RubyExeSpecs
     it "raises exception when command ends with not expected status" do
       expect {
         @script.ruby_exe("path", exit_status: 1)
-      }.to raise_error(%r{Expected exit status is 1 but actual is 4. Command ruby_exe\(.+\)})
+      }.to raise_error(%r{Expected exit status is 1 but actual is 4 for command ruby_exe\(.+\)})
     end
 
     it "does not raise exception when command ends with expected status" do