tzssangglass commented on a change in pull request #6256:
URL: https://github.com/apache/apisix/pull/6256#discussion_r815540454



##########
File path: t/plugin/error-log-logger-clickhouse.t
##########
@@ -0,0 +1,279 @@
+#
+# Licensed to the Apache Software Foundation (ASF) under one or more
+# contributor license agreements.  See the NOTICE file distributed with
+# this work for additional information regarding copyright ownership.
+# The ASF licenses this file to You under the Apache License, Version 2.0
+# (the "License"); you may not use this file except in compliance with
+# the License.  You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+use t::APISIX 'no_plan';
+
+log_level("info");
+repeat_each(1);
+no_long_string();
+no_root_location();
+
+add_block_preprocessor(sub {
+    my ($block) = @_;
+
+    if ((!defined $block->error_log) && (!defined $block->no_error_log)) {
+        $block->set_value("no_error_log", "[error]");
+    }
+
+    if (!defined $block->request) {
+        $block->set_value("request", "GET /t");
+    }
+
+    my $http_config = $block->http_config // <<_EOC_;
+    server {
+        listen 10420;
+        location /error-logger-clickhouse/test {
+            content_by_lua_block {
+                ngx.req.read_body()
+                local data = ngx.req.get_body_data()
+                local headers = ngx.req.get_headers()
+                ngx.log(ngx.WARN, "clickhouse error log body: ", data)
+                for k, v in pairs(headers) do
+                    ngx.log(ngx.WARN, "clickhouse headers: " .. k .. ":" .. v)
+                end
+                ngx.say("ok")
+            }
+        }
+    }
+_EOC_
+
+    $block->set_value("http_config", $http_config);
+});
+
+run_tests();
+
+__DATA__
+
+=== TEST 1: test schema checker
+--- config
+    location /t {
+        content_by_lua_block {
+        local core = require("apisix.core")
+            local plugin = require("apisix.plugins.error-log-logger")
+            local ok, err = plugin.check_schema(
+                {
+                    clickhouse = {
+                                user = "default",
+                                password = "a",
+                                database = "default",
+                                logtable = "t",
+                                endpoint_addr = 
"http://127.0.0.1:10420/error-logger-clickhouse/test";
+                    }
+                },
+                core.schema.TYPE_METADATA
+            )
+            if not ok then
+                ngx.say(err)
+            end
+
+            ngx.say("done")
+        }
+    }
+--- request
+GET /t
+--- response_body
+done
+--- no_error_log
+[error]
+
+
+
+=== TEST 2: test unreachable server
+--- yaml_config
+apisix:
+    enable_admin: true
+    admin_key: null
+plugins:
+  - error-log-logger
+--- config
+    location /tg {
+        content_by_lua_block {
+            local core = require("apisix.core")
+            local t = require("lib.test_admin").test
+            local code, body = 
t('/apisix/admin/plugin_metadata/error-log-logger',
+                ngx.HTTP_PUT,
+                [[{
+                    "clickhouse": {
+                                "user": "default",
+                                "password": "a",
+                                "database": "default",
+                                "logtable": "t",
+                                "endpoint_addr": 
"http://127.0.0.1:10420/error-logger-clickhouse/test";
+                    },
+                    "inactive_timeout": 1
+                }]]
+                )
+            ngx.sleep(2)
+            core.log.warn("this is a warning message for test2.")
+        }
+    }
+--- request
+GET /tg
+--- response_body
+--- error_log
+clickhouse error log body: INSERT INTO t FORMAT JSONEachRow
+clickhouse headers: x-clickhouse-key:a
+clickhouse headers: x-clickhouse-user:default
+clickhouse headers: x-clickhouse-database:default
+--- wait: 3
+
+
+
+=== TEST 3: put plugin metadata and log an error level message
+--- yaml_config
+apisix:
+    enable_admin: true
+    admin_key: null
+plugins:
+  - error-log-logger
+--- config
+    location /tg {
+        content_by_lua_block {
+            local core = require("apisix.core")
+            local t = require("lib.test_admin").test
+            local code, body = 
t('/apisix/admin/plugin_metadata/error-log-logger',
+                ngx.HTTP_PUT,
+                [[{
+                    "clickhouse": {
+                                "user": "default",
+                                "password": "a",
+                                "database": "default",
+                                "logtable": "t",
+                                "endpoint_addr": 
"http://127.0.0.1:10420/error-logger-clickhouse/test";
+                    },
+                    "batch_max_size": 15,
+                    "inactive_timeout": 1
+                }]]
+                )
+            ngx.sleep(2)
+            core.log.warn("this is an error message for test3.")
+        }
+    }
+--- request
+GET /tg
+--- response_body
+--- error_log
+clickhouse error log body: INSERT INTO t FORMAT JSONEachRow
+clickhouse headers: x-clickhouse-key:a
+clickhouse headers: x-clickhouse-user:default
+clickhouse headers: x-clickhouse-database:default
+--- wait: 5
+
+
+
+=== TEST 4: log a warn level message
+--- yaml_config
+apisix:
+    enable_admin: true
+    admin_key: null
+plugins:
+  - error-log-logger
+--- config
+    location /tg {
+        content_by_lua_block {
+            local core = require("apisix.core")
+            core.log.warn("this is a warning message for test4.")
+        }
+    }
+--- request
+GET /tg
+--- response_body
+--- error_log
+clickhouse error log body: INSERT INTO t FORMAT JSONEachRow
+clickhouse headers: x-clickhouse-key:a
+clickhouse headers: x-clickhouse-user:default
+clickhouse headers: x-clickhouse-database:default
+--- wait: 5
+
+
+
+=== TEST 5: log some messages
+--- yaml_config
+apisix:
+    enable_admin: true
+    admin_key: null
+plugins:
+  - error-log-logger
+--- config
+    location /tg {
+        content_by_lua_block {
+            local core = require("apisix.core")
+            core.log.warn("this is a warning message for test5.")
+        }
+    }
+--- request
+GET /tg
+--- response_body
+--- error_log
+clickhouse error log body: INSERT INTO t FORMAT JSONEachRow
+clickhouse headers: x-clickhouse-key:a
+clickhouse headers: x-clickhouse-user:default
+clickhouse headers: x-clickhouse-database:default
+--- wait: 5
+
+
+
+=== TEST 6: log an info level message
+--- yaml_config
+apisix:
+    enable_admin: true
+    admin_key: null
+plugins:
+  - error-log-logger
+--- config
+    location /tg {
+        content_by_lua_block {
+            local core = require("apisix.core")
+            core.log.info("this is an info message for test6.")
+        }
+    }
+--- request
+GET /tg
+--- response_body
+--- error_log
+this is an info message for test6
+--- wait: 5
+
+
+
+=== TEST 7: delete metadata for the plugin, recover to the default

Review comment:
       ok, I see that the original test case has covered the: 
https://github.com/apache/apisix/blob/acbb111afbbd096444bdd6dc0307d18187b19829/t/plugin/error-log-logger.t#L259-L334




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