xds_testing: add more header matcher tests

- present_match
- Int64Range range_match

tools/run_tests/run_xds_tests.py

@@ -285,6 +285,9 @@ _TESTS_TO_SEND_METADATA = ['header_matching']
 _TEST_METADATA_KEY = 'xds_md'
 _TEST_METADATA_VALUE_UNARY = 'unary_yranu'
 _TEST_METADATA_VALUE_EMPTY = 'empty_ytpme'
+# Extra RPC metadata whose value is a number, sent with UnaryCall only.
+_TEST_METADATA_NUMERIC_KEY = 'xds_md_numeric'
+_TEST_METADATA_NUMERIC_VALUE = '159'
 _PATH_MATCHER_NAME = 'path-matcher'
 _BASE_TEMPLATE_NAME = 'test-template'
 _BASE_INSTANCE_GROUP_NAME = 'test-ig'
@@ -1158,22 +1161,64 @@ def test_header_matching(gcp, original_backend_service, instance_group,
                     "EmptyCall": alternate_backend_instances,
                     "UnaryCall": original_backend_instances
                 }),
+            (
+                [{
+                    'priority': 0,
+                    # Header 'xds_md_numeric' present -> alternate_backend_service.
+                    # UnaryCall is sent with the metadata, so will be sent to alternative.
+                    'matchRules': [{
+                        'prefixMatch':
+                            '/',
+                        'headerMatches': [{
+                            'headerName': _TEST_METADATA_NUMERIC_KEY,
+                            'presentMatch': True
+                        }]
+                    }],
+                    'service': alternate_backend_service.url
+                }],
+                {
+                    "EmptyCall": original_backend_instances,
+                    "UnaryCall": alternate_backend_instances
+                }),
             (
                 [{
                     'priority': 0,
                     # Header invert ExactMatch -> alternate_backend_service.
-                    # EmptyCall is sent with the metadata, so will be sent to original.
+                    # UnaryCall is sent with the metadata, so will be sent to
+                    # original. EmptyCall will be sent to alternative.
                     'matchRules': [{
                         'prefixMatch':
                             '/',
                         'headerMatches': [{
                             'headerName': _TEST_METADATA_KEY,
-                            'exactMatch': _TEST_METADATA_VALUE_EMPTY,
+                            'exactMatch': _TEST_METADATA_VALUE_UNARY,
                             'invertMatch': True
                         }]
                     }],
                     'service': alternate_backend_service.url
                 }],
+                {
+                    "EmptyCall": alternate_backend_instances,
+                    "UnaryCall": original_backend_instances
+                }),
+            (
+                [{
+                    'priority': 0,
+                    # Header 'xds_md_numeric' range [100,200] -> alternate_backend_service.
+                    # UnaryCall is sent with the metadata in range.
+                    'matchRules': [{
+                        'prefixMatch':
+                            '/',
+                        'headerMatches': [{
+                            'headerName': _TEST_METADATA_NUMERIC_KEY,
+                            'rangeMatch': {
+                                'rangeStart': '100',
+                                'rangeEnd': '200'
+                            }
+                        }]
+                    }],
+                    'service': alternate_backend_service.url
+                }],
                 {
                     "EmptyCall": original_backend_instances,
                     "UnaryCall": alternate_backend_instances
@@ -2214,11 +2259,13 @@ try:
                 rpcs_to_send = '--rpc="UnaryCall"'
 
             if test_case in _TESTS_TO_SEND_METADATA:
-                metadata_to_send = '--metadata="EmptyCall:{keyE}:{valueE},UnaryCall:{keyU}:{valueU}"'.format(
+                metadata_to_send = '--metadata="EmptyCall:{keyE}:{valueE},UnaryCall:{keyU}:{valueU},UnaryCall:{keyNU}:{valueNU}"'.format(
                     keyE=_TEST_METADATA_KEY,
                     valueE=_TEST_METADATA_VALUE_EMPTY,
                     keyU=_TEST_METADATA_KEY,
-                    valueU=_TEST_METADATA_VALUE_UNARY)
+                    valueU=_TEST_METADATA_VALUE_UNARY,
+                    keyNU=_TEST_METADATA_NUMERIC_KEY,
+                    valueNU=_TEST_METADATA_NUMERIC_VALUE)
             else:
                 # Setting the arg explicitly to empty with '--metadata=""'
                 # makes C# client fail