move some code around, ending up with fewer files logically grouped

testing/test_looponfail.py

@@ -1,5 +1,65 @@
 import py
 from xdist.looponfail import RemoteControl
+from xdist.looponfail import StatRecorder
+
+class TestStatRecorder:
+    def test_filechange(self, tmpdir):
+        tmp = tmpdir
+        hello = tmp.ensure("hello.py")
+        sd = StatRecorder([tmp])
+        changed = sd.check()
+        assert not changed
+
+        hello.write("world")
+        changed = sd.check()
+        assert changed
+
+        tmp.ensure("new.py")
+        changed = sd.check()
+        assert changed
+
+        tmp.join("new.py").remove()
+        changed = sd.check()
+        assert changed
+
+        tmp.join("a", "b", "c.py").ensure()
+        changed = sd.check()
+        assert changed
+
+        tmp.join("a", "c.txt").ensure()
+        changed = sd.check()
+        assert changed
+        changed = sd.check()
+        assert not changed
+
+        tmp.join("a").remove()
+        changed = sd.check()
+        assert changed
+
+    def test_pycremoval(self, tmpdir):
+        tmp = tmpdir
+        hello = tmp.ensure("hello.py")
+        sd = StatRecorder([tmp])
+        changed = sd.check()
+        assert not changed
+
+        pycfile = hello + "c"
+        pycfile.ensure()
+        changed = sd.check()
+        assert not changed
+
+        hello.write("world")
+        changed = sd.check()
+        assert not pycfile.check()
+
+    def test_waitonchange(self, tmpdir, monkeypatch):
+        tmp = tmpdir
+        sd = StatRecorder([tmp])
+
+        l = [True, False]
+        monkeypatch.setattr(StatRecorder, 'check', lambda self: l.pop())
+        sd.waitonchange(checkinterval=0.2)
+        assert not l
 
 class TestRemoteControl:
     def test_nofailures(self, testdir):
@@ -174,3 +234,4 @@ def removepyc(path):
     pyc = path + "c"
     if pyc.check():
         pyc.remove()
+