test: add test for bare-metal deployer

.github/codecov.yml

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+coverage:
+  status:
+    project: on
+    patch: on

README.md

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 # gtctl
 
-[![codecov](https://codecov.io/github/GreptimeTeam/gtctl/branch/main/graph/badge.svg?token=287NUSEH5D)](https://codecov.io/github/GreptimeTeam/gtctl)
+[![codecov](https://codecov.io/github/GreptimeTeam/gtctl/branch/develop/graph/badge.svg?token=287NUSEH5D)](https://app.codecov.io/github/GreptimeTeam/gtctl/tree/develop)
 
 ## Overview
 

pkg/deployer/baremetal/deployer_test.go

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+// Copyright 2023 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package baremetal
+
+import (
+	"context"
+	"os"
+	"path"
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+
+	"github.com/GreptimeTeam/gtctl/pkg/deployer/baremetal/component"
+	"github.com/GreptimeTeam/gtctl/pkg/deployer/baremetal/config"
+	"github.com/GreptimeTeam/gtctl/pkg/logger"
+)
+
+var L = logger.New(os.Stdout, 1, logger.WithColored())
+
+func TestNewDeployer(t *testing.T) {
+	homedir, err := os.UserHomeDir()
+	assert.NoError(t, err)
+	clusterName := "test"
+
+	// New Deployer with no options
+	deployer, err := NewDeployer(L, clusterName)
+	assert.NoError(t, err)
+	d1, ok := deployer.(*Deployer)
+	assert.True(t, ok)
+	assert.NotNil(t, d1)
+	assert.Equal(t, d1.baseDir, path.Join(homedir, config.GtctlDir))
+	assert.Equal(t, d1.clusterDir, path.Join(homedir, config.GtctlDir, clusterName))
+	assert.Equal(t, d1.workingDirs, component.WorkingDirs{
+		DataDir: path.Join(homedir, config.GtctlDir, clusterName, "data"),
+		LogsDir: path.Join(homedir, config.GtctlDir, clusterName, "logs"),
+		PidsDir: path.Join(homedir, config.GtctlDir, clusterName, "pids"),
+	})
+	assert.False(t, d1.alwaysDownload)
+
+	// New Deployer with always download option
+	deployer, err = NewDeployer(L, clusterName, WithAlawaysDownload(true))
+	assert.NoError(t, err)
+	d2, ok := deployer.(*Deployer)
+	assert.True(t, ok)
+	assert.NotNil(t, d2)
+	assert.True(t, d2.alwaysDownload)
+
+	// New Deployer with config option
+	newConfig := config.DefaultConfig()
+	newConfig.Cluster.Frontend.Replicas = 3
+	deployer, err = NewDeployer(L, clusterName, WithConfig(newConfig))
+	assert.NoError(t, err)
+	d3, ok := deployer.(*Deployer)
+	assert.True(t, ok)
+	assert.NotNil(t, d3)
+	assert.Equal(t, newConfig, d3.config)
+
+	// New Deployer with specific version
+	version := "foobar"
+	deployer, err = NewDeployer(L, clusterName, WithGreptimeVersion(version))
+	assert.NoError(t, err)
+	d4, ok := deployer.(*Deployer)
+	assert.True(t, ok)
+	assert.NotNil(t, d4)
+	assert.Equal(t, version, d4.config.Cluster.Artifact.Version)
+}
+
+func TestDeleteGreptimeClusterForeground(t *testing.T) {
+	clusterName := "test"
+
+	d, err := NewDeployer(L, clusterName)
+	assert.NoError(t, err)
+	deployer, ok := d.(*Deployer)
+	assert.True(t, ok)
+	assert.NotNil(t, deployer)
+
+	err = deployer.deleteGreptimeDBClusterForeground(context.Background(), component.DeleteOptions{})
+	assert.NoError(t, err)
+
+	info, err := os.Stat(deployer.clusterDir)
+	if os.IsExist(err) {
+		t.Errorf("cluster dir %s should not exist: %v", deployer.clusterDir, err)
+	}
+	if info != nil && !info.IsDir() {
+		t.Errorf("cluster dir %s is not a dir", deployer.clusterDir)
+	}
+}