ci: add a workflow for tests

- Added an action for running mage targets
- Added a workflow for running tests
- Add our first unit test

PR: #52

.forgejo/actions/mage/Dockerfile

@@ -0,0 +1,6 @@
+# syntax=docker/dockerfile:1
+FROM golang:1.23.0
+
+RUN go install github.com/magefile/mage@v1.15.0
+
+ENTRYPOINT ["mage"]

.forgejo/actions/mage/action.yaml

@@ -0,0 +1,16 @@
+---
+name: "Enbas Mage Action"
+description: "Runs a mage target in the Enbas project"
+
+inputs:
+  target:
+    description: "The mage target to run"
+    required: true
+
+runs:
+  using: "docker"
+  image: "Dockerfile"
+  entrypoint: "mage"
+  args:
+  - -v
+  - ${{ inputs.target }}

.forgejo/workflows/Tests.yaml

@@ -0,0 +1,23 @@
+---
+name: Tests
+
+on:
+  pull_request:
+    types:
+    - opened
+    - synchronize
+
+jobs:
+  test:
+    if: ${{ ! github.event.pull_request.draft }}
+    runs-on: docker
+    steps:
+    - name: Checkout Repository
+      uses: https://code.forgejo.org/actions/checkout@v4
+    - name: Test
+      uses: ./.forgejo/actions/mage
+      with:
+        target: test
+      env:
+        ENBAS_TEST_VERBOSE: "1"
+        ENBAS_TEST_COVER: "1"

internal/utilities/utilities_test.go

@@ -0,0 +1,38 @@
+package utilities_test
+
+import (
+	"testing"
+
+	"codeflow.dananglin.me.uk/apollo/enbas/internal/utilities"
+)
+
+func TestGetFQDN(t *testing.T) {
+	t.Parallel()
+
+	cases := []struct {
+		instance string
+		want     string
+	}{
+		{
+			instance: "https://gts.red-crow.private",
+			want:     "gts.red-crow.private",
+		},
+		{
+			instance: "http://gotosocial.yellow-desert.social",
+			want:     "gotosocial.yellow-desert.social",
+		},
+		{
+			instance: "fedi.blue-mammoth.party",
+			want:     "fedi.blue-mammoth.party",
+		},
+	}
+
+	for _, c := range cases {
+		got := utilities.GetFQDN(c.instance)
+		if c.want != got {
+			t.Errorf("Unexpected result: want %s, got %s", c.want, got)
+		} else {
+			t.Logf("Expected result: got %s", got)
+		}
+	}
+}