diff --git a/.gitignore b/.gitignore
index 6e54925..930ecc9 100644
--- a/.gitignore
+++ b/.gitignore
@@ -24,10 +24,13 @@ csv_metadata
 scripts
 
 # test
-*.csv
+# *.csv
 
 # Exclude macOS Finder (System Explorer) View States
 .DS_Store
 
 # Test coverage reports
 coverage/
+
+# currently local
+test/complex-test.csv
diff --git a/test/test-sample.csv b/test/test-sample.csv
new file mode 100644
index 0000000..53a157f
--- /dev/null
+++ b/test/test-sample.csv
@@ -0,0 +1,53 @@
+name,age,email,description,notes
+John Doe,25,john@example.com,Simple record,No special characters
+"Jane Smith",30,"jane@test.com","Contains, comma","Normal quoted field"
+Bob,,"bob@mail.com","Missing age field",
+"Alice ""Wonder"" Land",28,alice@wonder.com,"Contains ""quotes"" inside","Escaped quotes test"
+"Charlie
+Multi-line",35,charlie@test.com,"This description
+spans multiple lines","Multi-line content"
+"Eve,Comma",22,"eve,comma@test.com","Name with, comma","Email with, comma"
+,40,empty@name.com,Empty name field,Missing first field
+"Frank O'Connor",45,frank@test.com,"Name with apostrophe","Single quote test"
+"   Leading Spaces",50,"  spaces@test.com  ","   Padded content   ","Whitespace handling"
+"Trailing comma test",60,trailing@test.com,"Description,","Field ends with comma"
+"Unicode测试",25,unicode@测试.com,"包含中文字符","Unicode content test"
+"Special chars !@#$%",30,special@test.com,"Contains !@#$%^&*()","Special characters"
+"",0,"","","All empty quoted fields"
+'Single quotes',35,'single@test.com','Single quoted fields','Non-standard quoting'
+"Very long field with lots of text that goes on and on and on to test how the parser handles really long content without breaking or causing memory issues",99,long@test.com,"Another very long field that contains a lot of descriptive text to see how well the CSV parser can handle large amounts of data in a single field","Long content stress test"
+"Test User 16",16,user16@test.com,"Standard test case","Normal data"
+"Test User 17",17,user17@test.com,"Standard test case","Normal data"
+"Test User 18",18,user18@test.com,"Standard test case","Normal data"
+"Test User 19",19,user19@test.com,"Standard test case","Normal data"
+"Test User 20",20,user20@test.com,"Standard test case","Normal data"
+"Test User 21",21,user21@test.com,"Standard test case","Normal data"
+"Test User 22",22,user22@test.com,"Standard test case","Normal data"
+"Test User 23",23,user23@test.com,"Standard test case","Normal data"
+"Test User 24",24,user24@test.com,"Standard test case","Normal data"
+"Test User 25",25,user25@test.com,"Standard test case","Normal data"
+"Test User 26",26,user26@test.com,"Standard test case","Normal data"
+"Test User 27",27,user27@test.com,"Standard test case","Normal data"
+"Test User 28",28,user28@test.com,"Standard test case","Normal data"
+"Test User 29",29,user29@test.com,"Standard test case","Normal data"
+"Test User 30",30,user30@test.com,"Standard test case","Normal data"
+"Test User 31",31,user31@test.com,"Standard test case","Normal data"
+"Test User 32",32,user32@test.com,"Standard test case","Normal data"
+"Test User 33",33,user33@test.com,"Standard test case","Normal data"
+"Test User 34",34,user34@test.com,"Standard test case","Normal data"
+"Test User 35",35,user35@test.com,"Standard test case","Normal data"
+"Test User 36",36,user36@test.com,"Standard test case","Normal data"
+"Test User 37",37,user37@test.com,"Standard test case","Normal data"
+"Test User 38",38,user38@test.com,"Standard test case","Normal data"
+"Test User 39",39,user39@test.com,"Standard test case","Normal data"
+"Test User 40",40,user40@test.com,"Standard test case","Normal data"
+"Test User 41",41,user41@test.com,"Standard test case","Normal data"
+"Test User 42",42,user42@test.com,"Standard test case","Normal data"
+"Test User 43",43,user43@test.com,"Standard test case","Normal data"
+"Test User 44",44,user44@test.com,"Standard test case","Normal data"
+"Test User 45",45,user45@test.com,"Standard test case","Normal data"
+"Test User 46",46,user46@test.com,"Standard test case","Normal data"
+"Test User 47",47,user47@test.com,"Standard test case","Normal data"
+"Test User 48",48,user48@test.com,"Standard test case","Normal data"
+"Test User 49",49,user49@test.com,"Standard test case","Normal data"
+"Test User 50",50,user50@test.com,"Standard test case","Normal data"