feat: solve day 1 part 1

internal/file/file.go

@@ -0,0 +1,28 @@
+// Package file provides useful methods for interacting with files
+package file
+
+import (
+	"bufio"
+	"fmt"
+	"os"
+)
+
+func ReadLines(filePath string) []string {
+	lines := []string{}
+
+	file, openErr := os.Open(filePath)
+
+	if openErr != nil {
+		return lines
+	}
+
+	scanner := bufio.NewScanner(file)
+
+	for hasLine := scanner.Scan(); hasLine; hasLine = scanner.Scan() {
+		line := scanner.Text()
+		fmt.Println(line)
+		lines = append(lines, line)
+	}
+
+	return lines
+}

internal/file/file_test.go

@@ -0,0 +1,21 @@
+package file_test
+
+import (
+	"slices"
+	"testing"
+
+	"github.com/StevanFreeborn/advent-of-code-2025/internal/file"
+)
+
+func TestReadLines(t *testing.T) {
+	expectedLines := []string{
+		"hello",
+		"world",
+	}
+
+	result := file.ReadLines("test.txt")
+
+	if slices.Equal(result, expectedLines) == false {
+		t.Errorf("got %s but expected %s", result, expectedLines)
+	}
+}

internal/file/test.txt

@@ -0,0 +1,2 @@
+hello
+world