More tests, filtering iterator, cleanup

tests/test/test/data/data.csv

@@ -0,0 +1,6 @@
+"a";"b"
+1;a
+2;b
+3;c
+4;d
+5;e

tests/test/test/data/data.json

@@ -0,0 +1,7 @@
+[
+    { "a": 1, "b": "a" },
+    { "a": 2, "b": "b" },
+    { "a": 3, "b": "c" },
+    { "a": 4, "b": "d" },
+    { "a": 5, "b": "e" }
+]

tests/test/test/dataset.json

@@ -0,0 +1,10 @@
+{
+    "datasets": {
+        "csv": {
+            "filename": "data/data.csv"
+        },
+        "json": {
+            "filename": "data/data.json"
+        }
+    }
+}