feat: add tests in CI

.github/workflows/CD.yml

@@ -0,0 +1,17 @@
+name: Continuous Deployment
+push:
+  branches:
+    - main
+jobs:
+  build:
+    name: Build and publish Docker image
+    runs-on: ubuntu-latest
+    steps:
+      - name: Login to Docker Hub
+        uses: docker/login-action@v3
+        with:
+          username: ${{ secrets.DOCKERHUB_USERNAME }}
+          password: ${{ secrets.DOCKERHUB_TOKEN }}
+      - uses: actions/checkout@v2
+      - name: Build and publish
+        run: ./build.sh

.github/workflows/CI.yml

@@ -1,17 +1,11 @@
-name: Continuous Deployment
-push:
-  branches:
-    - main
+name: Continuous Integration
+on: [pull_request]
+
 jobs:
-  build:
-    name: Build and publish Docker image
+  test:
+    name: Test
     runs-on: ubuntu-latest
     steps:
-      - name: Login to Docker Hub
-        uses: docker/login-action@v3
-        with:
-          username: ${{ secrets.DOCKERHUB_USERNAME }}
-          password: ${{ secrets.DOCKERHUB_TOKEN }}
       - uses: actions/checkout@v2
-      - name: Build and publish
-        run: ./build.sh
+      - name: Test
+        run: go test -v ./...

utils/date.go

@@ -0,0 +1,10 @@
+package utils
+
+import (
+	"time"
+)
+
+func GetBeginningOfMonth() time.Time {
+	now := time.Now()
+	return time.Date(now.Year(), now.Month(), 1, 0, 0, 0, 0, time.UTC)
+}

utils/date_test.go

@@ -0,0 +1,23 @@
+package utils
+
+import "testing"
+
+func TestGetBeginningOfMonth(t *testing.T) {
+	date := GetBeginningOfMonth()
+	println(date.String())
+	if date.Day() != 1 {
+		t.Fatalf("Expected day to be 1, got %d", date.Day())
+	}
+	if date.Hour() != 0 {
+		t.Fatalf("Expected hour to be 0, got %d", date.Hour())
+	}
+	if date.Minute() != 0 {
+		t.Fatalf("Expected minute to be 0, got %d", date.Minute())
+	}
+	if date.Second() != 0 {
+		t.Fatalf("Expected second to be 0, got %d", date.Second())
+	}
+	if date.Nanosecond() != 0 {
+		t.Fatalf("Expected nanosecond to be 0, got %d", date.Nanosecond())
+	}
+}