test: favor Process.spawn when possible

Process.spawn allows vfork() + execve() usage in Ruby 2.2.0 to
improve performance over normal fork() + execve().

2 files changed, 5 insertions, 6 deletions

diff --git a/test/test_player_integration.rb b/test/test_player_integration.rb
index d4bae8d..66f599e 100644
--- a/test/test_player_integration.rb
+++ b/test/test_player_integration.rb
@@ -5,10 +5,9 @@ class TestPlayerIntegration < Testcase
   include PlayerIntegration
 
   def test_cmd_rate
-    pid = fork do
-      @fmt.to_env.each { |k,v| ENV[k] = v }
-      exec("sox -n $SOXFMT - synth 3 pinknoise | #@cmd")
-    end
+    env = ENV.to_hash.merge(@fmt.to_env)
+    cmd = "sox -n $SOXFMT - synth 3 pinknoise | #@cmd"
+    pid = Process.spawn(env, cmd)
     t = Time.now
     _, _ = Process.waitpid2(pid)
     elapsed = Time.now - t
diff --git a/test/test_splitfx.rb b/test/test_splitfx.rb
index fd1873e..ab0dcd2 100644
--- a/test/test_splitfx.rb
+++ b/test/test_splitfx.rb
@@ -31,9 +31,9 @@ class TestSplitfx < Testcase
 
         # compare results with expected output
         res_cmd = "sox 1.flac 2.flac -ts32 -c2 -r44100 result.s32"
-        res_pid = fork { exec res_cmd }
+        res_pid = Process.spawn(res_cmd)
         exp_cmd = "sox foo.flac -ts32 -c2 -r44100 expect.s32 trim 4"
-        exp_pid = fork { exec exp_cmd }
+        exp_pid = Process.spawn(exp_cmd)
         _, s = Process.waitpid2(res_pid)
         assert s.success?, "#{res_cmd}: #{s.inspect}"
         _, s = Process.waitpid2(exp_pid)