chore: refactor after discussion

tests/README.md

@@ -0,0 +1,31 @@
+# Pebble Integration Tests
+
+## Run Tests
+
+```bash
+go test -tags=integration ./tests/
+```
+
+## Developing
+
+### Clean Test Cache
+
+If you are adding tests and debugging, remember to clean test cache:
+
+```bash
+go clean -testcache && go test -v -tags=integration ./tests/
+```
+
+### Visual Studio Code Settings
+
+For the VSCode Go extention to work properly with files with build tags, add the following:
+
+```json
+{
+    "gopls": {
+        "build.buildFlags": [
+            "-tags=integration"
+        ]
+    }
+}
+```

tests/main_test.go

@@ -0,0 +1,67 @@
+//go:build integration
+
+// Copyright (c) 2024 Canonical Ltd
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License version 3 as
+// published by the Free Software Foundation.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+package tests_test
+
+import (
+	"fmt"
+	"os"
+	"os/exec"
+	"testing"
+	"time"
+
+	. "github.com/canonical/pebble/tests"
+)
+
+func TestMain(m *testing.M) {
+	goBuild := exec.Command("go", "build", "-o", "../pebble", "../cmd/pebble")
+	if err := goBuild.Run(); err != nil {
+		fmt.Println("Setup failed with error:", err)
+		os.Exit(1)
+	}
+
+	exitVal := m.Run()
+	os.Exit(exitVal)
+}
+
+func TestPebbleRunNormal(t *testing.T) {
+	pebbleDir := t.TempDir()
+
+	layerYAML := `
+services:
+    demo-service:
+        override: replace
+        command: sleep 1000
+        startup: enabled
+    demo-service2:
+        override: replace
+        command: sleep 1000
+        startup: enabled
+`[1:]
+
+	CreateLayer(t, pebbleDir, "001-simple-layer.yaml", layerYAML)
+
+	logsCh := PebbleRun(t, pebbleDir)
+	expected := []string{
+		"Started daemon",
+		"Service \"demo-service\" starting",
+		"Service \"demo-service2\" starting",
+		"Started default services with change",
+	}
+	if err := WaitForLogs(logsCh, expected, time.Second*3); err != nil {
+		t.Errorf("Error waiting for logs: %v", err)
+	}
+}