From b84733ca333f2b1835aff8756bea91bb068f337e Mon Sep 17 00:00:00 2001
From: Dominik Winter <dominik.winter@klarna.com>
Date: Thu, 25 Jan 2024 12:11:00 +0100
Subject: [PATCH 1/2] fix installation problems

---
 go.mod | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/go.mod b/go.mod
index 2c13fde..b468047 100644
--- a/go.mod
+++ b/go.mod
@@ -1,3 +1,3 @@
-module genpno
+module github.com/dominikwinter/genpno
 
 go 1.21.6

From 9d4fb360fcde846901327f4bcd53441ac88986d8 Mon Sep 17 00:00:00 2001
From: Dominik Winter <dominik.winter@klarna.com>
Date: Thu, 25 Jan 2024 12:11:09 +0100
Subject: [PATCH 2/2] add unit tests

---
 Makefile     |  8 +++++++-
 main_test.go | 32 ++++++++++++++++++++++++++++++++
 2 files changed, 39 insertions(+), 1 deletion(-)
 create mode 100644 main_test.go

diff --git a/Makefile b/Makefile
index 768b912..f947134 100644
--- a/Makefile
+++ b/Makefile
@@ -1,13 +1,19 @@
-.PHONY: default b build i install r release
+.PHONY: default t test b build i install c clean r release
 
 default: build
 
+t test:
+	go test -v
+
 b build:
 	go build
 
 i install:
 	go install
 
+c clean:
+	go mod tidy
+
 r release:
 	mkdir -p bin
 	CGO_ENABLED=0 GOOS=darwin GOARCH=arm64 go build -o bin/genpno-macos-arm64
diff --git a/main_test.go b/main_test.go
new file mode 100644
index 0000000..9db27c1
--- /dev/null
+++ b/main_test.go
@@ -0,0 +1,32 @@
+package main
+
+import (
+	"testing"
+)
+
+func Test_getRandomDate(t *testing.T) {
+	date := getRandomDate()
+
+	if l := len(date); l != 8 {
+		t.Errorf("Date is not 8 characters long, but %d", l)
+	}
+}
+
+func Test_getRandomThreeDigits(t *testing.T) {
+	three := getRandomThreeDigits(true)
+
+	if l := len(three); l != 3 {
+		t.Errorf("Three is not 3 characters long, but %d", l)
+	}
+}
+
+func Test_getChecksum(t *testing.T) {
+	date := "19800101"
+	three := "123"
+
+	checksum := getChecksum(&date, &three)
+
+	if l := len(checksum); l != 1 {
+		t.Errorf("Checksum is not 2 characters long, but %d", l)
+	}
+}