tests: ensure cmd.execute can handle large output

This test case ensures that cmd.execute can always handle
large command outputs.  This test does so by reading a 700k
file into memory.

Signed-off-by: David Aguilar <davvid@gmail.com>

Author: davvid

test/git/test_git.py

@@ -51,3 +51,7 @@ def test_it_does_not_strip_output_when_using_with_raw_output(self):
                      r"(\. See 'git --help'\.)?" + os.linesep,
                       self.git.this_does_not_exist(with_stderr=True,
                                                    with_raw_output=True))
+
+    def test_it_handles_large_input(self):
+        output = self.git.execute(["cat", "/bin/bash"])
+        assert( len(output) > 4096 * 1024 ) # at least 4k