import tempfile

from saltunittest import TestCase, TestLoader, TextTestRunner

from salt import config as sconfig
from salt.modules import file as filemod
from salt.modules import cmdmod

filemod.__salt__ = {
    'cmd.run': cmdmod.run,
}

SED_CONTENT = """test
some
content
/var/lib/foo/app/test
here
"""


class FileModuleTestCase(TestCase):
    def test_sed_limit_escaped(self):
        with tempfile.NamedTemporaryFile() as tfile:
            tfile.write(SED_CONTENT)
            tfile.seek(0, 0)

            path = tfile.name
            before = '/var/lib/foo'
            after = ''
            limit = '^{0}'.format(before)

            filemod.sed(path, before, after, limit=limit)

            with open(path, 'rb') as newfile:
                self.assertEquals(SED_CONTENT.replace(before, ''), newfile.read())


if __name__ == "__main__":
    loader = TestLoader()
    tests = loader.loadTestsFromTestCase(FileModuleTestCase)
    TextTestRunner(verbosity=1).run(tests)

@@ -230,16 +230,50 @@
 od.run,%0A
+    'cmd.run_all': cmdmod.run_all%0A
 %7D%0A%0ASED_C
@@ -800,16 +800,37 @@
 tEquals(
+%0A                    
 SED_CONT
@@ -857,23 +857,60 @@
 ''),
- newfile.read()
+%0A                    newfile.read()%0A                
 )%0A%0A%0A

Add `cmd.run_all` to `__salt__`. Required for the unit test.