diff --git a/day19/day19.py b/day19/day19.py
index b63854a..f8d227d 100644
--- a/day19/day19.py
+++ b/day19/day19.py
@@ -6,12 +6,14 @@
 """
 parsing classes section
 """
+INPUT = "day19/input.txt"
+INPUT_SMALL = "day19/input-small.txt"
 
 
-def get_input() -> tuple[list[Workflow], list[Part]]:
+def get_input(path: str) -> tuple[list[Workflow], list[Part]]:
     workflows: list[Workflow] = []
     parts: list[Part] = []
-    with open("day19/input.txt", encoding="utf8") as file:
+    with open(path, encoding="utf8") as file:
         for line in file:
             if len(line.strip()) == 0:
                 break
@@ -24,20 +26,20 @@ def get_input() -> tuple[list[Workflow], list[Part]]:
     return (workflows, parts)
 
 
-def process_part(workflows: dict[str, Workflow], part: Part) -> bool:
+def process_part(workflows: dict[str, Workflow], part: Part) -> int:
     # ends are `A` and R
     # start is `in`
     workflow = workflows["in"]
     while True:
         workflow_name = workflow.process_part(part)
         if workflow_name == "A":
-            return True
+            return part.rating
         if workflow_name == "R":
-            return False
+            return 0
         workflow = workflows[workflow_name]
 
 
-def solve_part2(workflows: dict[str, Workflow]) -> None:
+def solve_part2(workflows: dict[str, Workflow]) -> int:
     min_xmas = Part(1, 1, 1, 1)
     max_xmas = Part(4001, 4001, 4001, 4001)
     part_range = PartRange(min_xmas, max_xmas)
@@ -57,23 +59,27 @@ def solve_part2(workflows: dict[str, Workflow]) -> None:
                 result += item.part_range.size()
             elif item.destination != "R":
                 to_process.put(item)
-    print(result)
+    return result
 
 
-def main() -> None:
-    # combined
-    workflows, parts = get_input()
+def part1(workflows: list[Workflow], parts: list[Part]) -> int:
     workflows_mapping: dict[str, Workflow] = {wf.name: wf for wf in workflows}
+    total = sum(process_part(workflows_mapping, part) for part in parts)
+
+    return total
 
-    # part 1
-    total = 0
-    for part in parts:
-        if process_part(workflows_mapping, part):
-            total += part.rating
-    print(total)
 
-    # part 2
-    solve_part2(workflows_mapping)
+def part2(workflows: list[Workflow]) -> int:
+    workflows_mapping: dict[str, Workflow] = {wf.name: wf for wf in workflows}
+    return solve_part2(workflows_mapping)
+
+
+def main() -> None:
+    # combined
+    workflows, parts = get_input(INPUT)
+
+    print(part1(workflows, parts))
+    print(part2(workflows))
 
 
 if __name__ == "__main__":
diff --git a/day19/lib/classes.py b/day19/lib/classes.py
index af039a8..3aabd1c 100644
--- a/day19/lib/classes.py
+++ b/day19/lib/classes.py
@@ -177,7 +177,7 @@ def process_part_range(
         return None, fail
 
 
-@dataclass
+@dataclass(eq=True)
 class Workflow:
     name: str
     rules: list[Rule]
diff --git a/day19/tests/test_day19.py b/day19/tests/test_day19.py
new file mode 100644
index 0000000..946c59d
--- /dev/null
+++ b/day19/tests/test_day19.py
@@ -0,0 +1,8 @@
+from day19.day19 import INPUT_SMALL, get_input, part1, part2
+
+
+def test_day19() -> None:
+    workflows, parts = get_input(INPUT_SMALL)
+
+    assert part1(workflows, parts) == 19114
+    assert part2(workflows) == 167409079868000
diff --git a/day19/tests/test_parsers.py b/day19/tests/test_parsers.py
new file mode 100644
index 0000000..216f34c
--- /dev/null
+++ b/day19/tests/test_parsers.py
@@ -0,0 +1,65 @@
+"""parsers"""
+from day19.lib.classes import Comparator, Component, Condition, Part, Rule, Workflow
+from day19.lib.parsers import (
+    parse_condition_string,
+    parse_part_string,
+    parse_rule_string,
+    parse_workflow_string,
+)
+
+
+def test_parse_part_string() -> None:
+    part: Part = parse_part_string("{x=787,m=2655,a=1222,s=2876}\n")
+    assert part == Part(787, 2655, 1222, 2876)
+
+    part = parse_part_string("{x=1,m=2,a=3,s=4}\n")
+    assert part == Part(1, 2, 3, 4)
+
+
+def test_parse_workflow_string() -> None:
+    """
+    returns a workflow from a string representation
+    `px{a<2006:qkq,m>2090:A,rfg}\n`
+    """
+    workflow: Workflow = parse_workflow_string("px{a<2006:qkq,m>2090:A,rfg}\n")
+    rules = [
+        Rule("qkq", Condition(Component.A, Comparator.LessThan, 2006)),
+        Rule("A", Condition(Component.M, Comparator.GreaterThan, 2090)),
+        Rule("rfg", None),
+    ]
+    workflow2 = Workflow("px", rules)
+    assert workflow == workflow2  # confirm that workflow.eq works
+    assert workflow.name == workflow2.name
+    assert workflow.rules[0] == workflow2.rules[0]
+    assert workflow.rules[1] == workflow2.rules[1]
+    assert workflow.rules[2] == workflow2.rules[2]
+    assert workflow.rules == workflow2.rules
+
+
+def test_parse_rule_string() -> None:
+    """
+    `a<2006:qkq` or `rfg`
+    """
+    rule: Rule = parse_rule_string("a<2006:qkq")
+    rule2: Rule = Rule("qkq", Condition(Component.A, Comparator.LessThan, 2006))
+
+    assert rule.destination == rule2.destination
+    assert rule.condition == rule2.condition
+    assert rule == rule2
+
+    rule = parse_rule_string("rfg")
+    rule2 = Rule("rfg")
+
+    assert rule.destination == rule2.destination
+    assert rule.condition == rule2.condition
+    assert rule == rule2
+
+
+def test_parse_condition_string() -> None:
+    """a<2006"""
+    condition: Condition = parse_condition_string("a<2006")
+    condition2: Condition = Condition(Component.A, Comparator.LessThan, 2006)
+    assert condition == condition2
+    assert condition.component == condition2.component
+    assert condition.sign == condition2.sign
+    assert condition.value == condition2.value