defmodule LogParserTest do use ExUnit.Case describe "valid_line?/1" do @tag task_id: 1 test "valid DEBUG message" do assert LogParser.valid_line?("[DEBUG] response time 3ms") == true end @tag task_id: 1 test "valid INFO message" do assert LogParser.valid_line?("[INFO] the latest information") == true end @tag task_id: 1 test "valid WARNING message" do assert LogParser.valid_line?("[WARNING] something might be wrong") == true end @tag task_id: 1 test "valid ERROR message" do assert LogParser.valid_line?("[ERROR] something really bad happened") == true end @tag task_id: 1 test "unknown level" do assert LogParser.valid_line?("[BOB] something really bad happened") == false end @tag task_id: 1 test "line must start with level" do assert LogParser.valid_line?("bad start [DEBUG] ") == false end @tag task_id: 1 test "level must be wrapped in square brackets" do assert LogParser.valid_line?("ERROR something really bad happened") == false assert LogParser.valid_line?("[INFO the latest information") == false assert LogParser.valid_line?("DEBUG] response time 3ms") == false end @tag task_id: 1 test "level must be uppercase" do assert LogParser.valid_line?("[warning] something might be wrong") == false end end describe "split_line/1" do @tag task_id: 2 test "splits into three sections" do assert LogParser.split_line("[INFO] Start.<*>[INFO] Processing...<~~~>[INFO] Success.") == [ "[INFO] Start.", "[INFO] Processing...", "[INFO] Success." ] end @tag task_id: 2 test "symbols =, ~, *, and - can be freely mixed" do assert LogParser.split_line( "[DEBUG] Attempt nr 2<=>[DEBUG] Attempt nr 3<-*~*->[ERROR] Failed to send SMS." ) == [ "[DEBUG] Attempt nr 2", "[DEBUG] Attempt nr 3", "[ERROR] Failed to send SMS." ] end @tag task_id: 2 test "symbols other than =, ~, *, or - do not split" do assert LogParser.split_line( "[INFO] Attempt nr 1<=!>[INFO] Attempt nr 2< >[INFO] Attempt nr 3" ) == [ "[INFO] Attempt nr 1<=!>[INFO] Attempt nr 2< >[INFO] Attempt nr 3" ] end @tag task_id: 2 test "symbols between angular brackets aren't required" do assert LogParser.split_line("[INFO] Attempt nr 1<>[INFO] Attempt nr 2") == [ "[INFO] Attempt nr 1", "[INFO] Attempt nr 2" ] end @tag task_id: 2 test "angular brackets are required" do assert LogParser.split_line("[ERROR] Failed to send SMS**[ERROR] Invalid API key.") == [ "[ERROR] Failed to send SMS**[ERROR] Invalid API key." ] end @tag task_id: 2 test "angular brackets must be closed required" do assert LogParser.split_line("[ERROR] Failed to send SMS<**[ERROR] Invalid API key.") == [ "[ERROR] Failed to send SMS<**[ERROR] Invalid API key." ] end end describe "remove_artifacts/1" do @tag task_id: 3 test "removes a single 'end-of-line' followed by a line number" do assert LogParser.remove_artifacts("[WARNING] Network Failure end-of-line27") == "[WARNING] Network Failure " end @tag task_id: 3 test "leaves other lines unchanged" do assert LogParser.remove_artifacts("[DEBUG] Process started") == "[DEBUG] Process started" end @tag task_id: 3 test "removes multiple 'end-of-line's followed by line numbers" do assert LogParser.remove_artifacts( "[WARNING] end-of-line23033 Network Failure end-of-line27" ) == "[WARNING] Network Failure " end @tag task_id: 3 test "removes 'end-of-line' and line numbers even when not separated form the rest of the log by a space" do assert LogParser.remove_artifacts("[WARNING]end-of-line23033Network Failureend-of-line27") == "[WARNING]Network Failure" end @tag task_id: 3 test "does not remove 'end-of-line' if not followed by a line number" do assert LogParser.remove_artifacts("[INFO] end-of-line User disconnected end-of-lineXYZ") == "[INFO] end-of-line User disconnected end-of-lineXYZ" end @tag task_id: 3 test "does not remove 'end-of-line' if a number is separated by a space" do assert LogParser.remove_artifacts("[DEBUG] Query runtime:end-of-line 6ms") == "[DEBUG] Query runtime:end-of-line 6ms" end @tag task_id: 3 test "is case-insensitive" do assert LogParser.remove_artifacts("[DEBUG] END-of-LINE77 Process started End-Of-Line09") == "[DEBUG] Process started " end end describe "tag_with_user_name/1" do @tag task_id: 4 test "extracts user name and appends it to the line" do assert LogParser.tag_with_user_name("[WARN] User James123 has exceeded storage space") == "[USER] James123 [WARN] User James123 has exceeded storage space" end @tag task_id: 4 test "leaves other lines unchanged" do assert LogParser.tag_with_user_name("[DEBUG] Process started") == "[DEBUG] Process started" end @tag task_id: 4 test "multiple spaces can appear after the word 'User'" do assert LogParser.tag_with_user_name("[INFO] User Bob9 reported post fxa3qa") == "[USER] Bob9 [INFO] User Bob9 reported post fxa3qa" end @tag task_id: 4 test "user name can be delimited by tabs" do assert LogParser.tag_with_user_name( "[ERROR] User\t!!!\tdoes not have a valid payment method" ) == "[USER] !!! [ERROR] User\t!!!\tdoes not have a valid payment method" end @tag task_id: 4 test "user name can be delimited by new lines" do assert LogParser.tag_with_user_name("[DEBUG] Created User\nAlice908101\nat 14:02") == "[USER] Alice908101 [DEBUG] Created User\nAlice908101\nat 14:02" end @tag task_id: 4 test "user name can end with the end of the line" do assert LogParser.tag_with_user_name("[INFO] New log in for User __JOHNNY__") == "[USER] __JOHNNY__ [INFO] New log in for User __JOHNNY__" end @tag task_id: 4 test "works for Ukrainian user names with emoji" do assert LogParser.tag_with_user_name("[INFO] Promoted User АНАСТАСІЯ_🙂 to admin") == "[USER] АНАСТАСІЯ_🙂 [INFO] Promoted User АНАСТАСІЯ_🙂 to admin" end end end