Add test to beacon node fallback feature

Cargo.toml

@@ -150,6 +150,7 @@ log = "0.4"
 lru = "0.12"
 maplit = "1"
 milhouse = "0.3"
+mockito = "1.5.0"
 num_cpus = "1"
 parking_lot = "0.12"
 paste = "1"
@@ -240,6 +241,7 @@ malloc_utils = { path = "common/malloc_utils" }
 merkle_proof = { path = "consensus/merkle_proof" }
 monitoring_api = { path = "common/monitoring_api" }
 network = { path = "beacon_node/network" }
+node_test_rig = { path = "testing/node_test_rig"}
 operation_pool = { path = "beacon_node/operation_pool" }
 pretty_reqwest_error = { path = "common/pretty_reqwest_error" }
 proto_array = { path = "consensus/proto_array" }

validator_client/Cargo.toml

@@ -10,6 +10,10 @@ path = "src/lib.rs"
 
 [dev-dependencies]
 tokio = { workspace = true }
+mockito = { workspace = true }
+regex = { workspace = true }
+env_logger = { workspace = true }
+node_test_rig = { workspace = true }
 
 [dependencies]
 account_utils = { workspace = true }
@@ -24,15 +28,19 @@ environment = { workspace = true }
 graffiti_file = { workspace = true }
 hyper = { workspace = true }
 initialized_validators = { workspace = true }
+logging = { workspace = true }
 metrics = { workspace = true }
 monitoring_api = { workspace = true }
 parking_lot = { workspace = true }
 reqwest = { workspace = true }
 sensitive_url = { workspace = true }
 slashing_protection = { workspace = true }
 serde = { workspace = true }
+serde_json = { workspace = true }
 slog = { workspace = true }
 slot_clock = { workspace = true }
+task_executor = { workspace = true }
+tempfile = { workspace = true }
 types  = { workspace = true }
 validator_http_api = { workspace = true }
 validator_http_metrics = { workspace = true }
@@ -41,3 +49,7 @@ validator_services = { workspace = true }
 validator_store = { workspace = true }
 tokio = { workspace = true }
 fdlimit = "0.3.0"
+env_logger = { workspace = true }
+mockito = { workspace = true }
+regex = { workspace = true }
+eth2_config = { workspace = true }

validator_client/beacon_node_fallback/Cargo.toml

@@ -20,3 +20,11 @@ strum = { workspace = true }
 tokio = { workspace = true }
 types = { workspace = true }
 validator_metrics = { workspace = true }
+
+[dev-dependencies]
+env_logger = { workspace = true }
+eth2_config = { workspace = true }
+mockito = { workspace = true }
+validator_client = { workspace = true }
+validator_services = { workspace = true }
+logging = { workspace = true }