tests: check show route vrf all json output

Check that "show ip route vrf XXX json" and the JSON at key "XXX" of
"show ip route vrf all json" gives the same output.

Signed-off-by: Louis Scalbert <louis.scalbert@6wind.com>

tests/topotests/bgp_vrf_route_leak_basic/test_bgp-vrf-route-leak-basic.py

@@ -338,6 +338,21 @@ def test_vrf_route_leak_donna_after_eva_down():
     result, diff = topotest.run_and_expect(test_func, None, count=10, wait=0.5)
     assert result, "BGP VRF DONNA check failed:\n{}".format(diff)
 
+    """
+    Check that "show ip route vrf DONNA json" and the JSON at key "DONNA" of
+    "show ip route vrf all json" gives the same result.
+    """
+
+    def check_vrf_table(router, vrf, expect):
+        output = router.vtysh_cmd("show ip route vrf all json", isjson=True)
+        vrf_table = output.get(vrf, {})
+
+        return topotest.json_cmp(vrf_table, expect)
+
+    test_func = partial(check_vrf_table, r1, "DONNA", expect)
+    result, diff = topotest.run_and_expect(test_func, None, count=10, wait=0.5)
+    assert result, "BGP VRF DONNA check failed:\n{}".format(diff)
+
 
 def test_vrf_route_leak_donna_after_eva_up():
     logger.info("Ensure that route states change after EVA interface goes up")