diff --git a/TestData/fewparameters.csv b/TestData/fewparameters.csv
new file mode 100644
index 0000000..56f72ca
--- /dev/null
+++ b/TestData/fewparameters.csv
@@ -0,0 +1,2 @@
+groupNumber,averageGrade,recordBookNumber
+A21,5.0
\ No newline at end of file
diff --git a/TestData/invalid_averagegrade.csv b/TestData/invalid_averagegrade.csv
new file mode 100644
index 0000000..860b9e8
--- /dev/null
+++ b/TestData/invalid_averagegrade.csv
@@ -0,0 +1,2 @@
+groupNumber,averageGrade,recordBookNumber
+A21,-1.0,111
\ No newline at end of file
diff --git a/TestData/invalid_groupnumber.csv b/TestData/invalid_groupnumber.csv
new file mode 100644
index 0000000..12ac7c4
--- /dev/null
+++ b/TestData/invalid_groupnumber.csv
@@ -0,0 +1,2 @@
+groupNumber,averageGrade,recordBookNumber
+A123,4.0,111
\ No newline at end of file
diff --git a/TestData/invalid_header.csv b/TestData/invalid_header.csv
new file mode 100644
index 0000000..a08b1a1
--- /dev/null
+++ b/TestData/invalid_header.csv
@@ -0,0 +1 @@
+groupNumber;averageGrade;recordBookNomber
diff --git a/TestData/invalid_recordbooknumber.csv b/TestData/invalid_recordbooknumber.csv
new file mode 100644
index 0000000..5020f73
--- /dev/null
+++ b/TestData/invalid_recordbooknumber.csv
@@ -0,0 +1,2 @@
+groupNumber,averageGrade,recordBookNumber
+A21,5.0,-1
\ No newline at end of file
diff --git a/TestData/sample.csv b/TestData/sample.csv
new file mode 100644
index 0000000..dc39a74
--- /dev/null
+++ b/TestData/sample.csv
@@ -0,0 +1,3 @@
+groupNumber,averageGrade,recordBookNumber
+A21,5.0,331
+A21,4.0,332
\ No newline at end of file