added unit tests for the terraform package

internal/terraform/local.go

@@ -25,6 +25,7 @@ import (
 
 const (
 	versionPrefix = "terraform_"
+	defaultMirror = "https://releases.hashicorp.com/terraform"
 )
 
 type local struct {
@@ -64,11 +65,11 @@ func (l *local) Run() error {
 
 func (l *local) Prepare() error {
 	var (
-		defaultMirror = "https://releases.hashicorp.com/terraform"
-		path          = ""
+		mirror = defaultMirror
+		path   = ""
 	)
 
-	path, err := installVersion(l.version, &defaultMirror)
+	path, err := installVersion(l.version, &mirror)
 	if err != nil {
 		return err
 	}
@@ -195,7 +196,10 @@ func installVersion(version string, mirrorURL *string) (string, error) {
 		exist := tfswitcher.VersionExist(requestedVersion, tflist) //check if version exist before downloading it
 
 		if exist {
-			Install(requestedVersion, *mirrorURL)
+			err := Install(requestedVersion, *mirrorURL)
+			if err != nil {
+				return "", err
+			}
 		} else {
 			return "", fmt.Errorf("provided terraform version does not exist")
 		}
@@ -227,7 +231,7 @@ func Install(tfversion string, mirrorURL string) error {
 
 	/* if selected version already exists */
 	if fileExist {
-		os.Exit(0)
+		return nil
 	}
 
 	// if it does not have a slash - append it
@@ -243,16 +247,14 @@ func Install(tfversion string, mirrorURL string) error {
 
 	/* If unable to download file from url, exit(1) immediately */
 	if errDownload != nil {
-		fmt.Println(errDownload)
-		os.Exit(1)
+		return errDownload
 	}
 
 	/* unzip the downloaded zipfile */
 	_, errUnzip := tfswitcher.Unzip(zipFile, installLocation)
 	if errUnzip != nil {
 		fmt.Println("[Error] : Unable to unzip downloaded zip file")
-		log.Fatal(errUnzip)
-		os.Exit(1)
+		return errUnzip
 	}
 
 	/* rename unzipped file to terraform version name - terraform_x.x.x */

internal/terraform/terraform_test.go

@@ -0,0 +1,232 @@
+package terraform
+
+import (
+	"context"
+	"fmt"
+	"github.com/hazelops/ize/internal/config"
+	"github.com/hazelops/ize/pkg/terminal"
+	"io"
+	"os"
+	"testing"
+)
+
+func TestInstall(t *testing.T) {
+	type args struct {
+		tfversion string
+		mirrorURL string
+	}
+	tests := []struct {
+		name    string
+		args    args
+		wantErr bool
+	}{
+		{name: "success", args: args{
+			tfversion: "0.9.0",
+			mirrorURL: defaultMirror,
+		}, wantErr: false},
+		{name: "success exist", args: args{
+			tfversion: "0.9.0",
+			mirrorURL: defaultMirror,
+		}, wantErr: false},
+		{name: "invalid mirror", args: args{
+			tfversion: "1.2.9",
+			mirrorURL: "invalid.com/mirror",
+		}, wantErr: true},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			if err := Install(tt.args.tfversion, tt.args.mirrorURL); (err != nil) != tt.wantErr {
+				t.Errorf("Install() error = %v, wantErr %v", err, tt.wantErr)
+			}
+		})
+	}
+}
+
+func Test_installVersion(t *testing.T) {
+	mirror := defaultMirror
+	hd := home()
+
+	type args struct {
+		version   string
+		mirrorURL *string
+	}
+	tests := []struct {
+		name    string
+		args    args
+		want    string
+		wantErr bool
+	}{
+		{name: "success", args: args{
+			version:   "1.1.3",
+			mirrorURL: &mirror,
+		}, want: fmt.Sprintf("%s/%s", hd, ".ize/versions/terraform/terraform_1.1.3"), wantErr: false},
+		{name: "success exist", args: args{
+			version:   "1.1.3",
+			mirrorURL: &mirror,
+		}, want: fmt.Sprintf("%s/%s", hd, ".ize/versions/terraform/terraform_1.1.3"), wantErr: false},
+		{name: "invalid tf version", args: args{
+			version:   "1.1.X",
+			mirrorURL: &mirror,
+		}, wantErr: true},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			got, err := installVersion(tt.args.version, tt.args.mirrorURL)
+			if (err != nil) != tt.wantErr {
+				t.Errorf("installVersion() error = %v, wantErr %v", err, tt.wantErr)
+				return
+			}
+			if got != tt.want {
+				t.Errorf("installVersion() got = %v, want %v", got, tt.want)
+			}
+		})
+	}
+}
+
+func Test_local_Prepare(t *testing.T) {
+	type fields struct {
+		version string
+		command []string
+		env     []string
+		output  io.Writer
+		tfpath  string
+		project *config.Project
+	}
+	tests := []struct {
+		name    string
+		fields  fields
+		wantErr bool
+	}{
+		{name: "success", fields: fields{
+			version: "1.1.3",
+			command: []string{"version"},
+			env:     nil,
+			output:  os.Stdout,
+			tfpath:  "",
+			project: &config.Project{},
+		}, wantErr: false},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			l := &local{
+				version: tt.fields.version,
+				command: tt.fields.command,
+				env:     tt.fields.env,
+				output:  tt.fields.output,
+				tfpath:  tt.fields.tfpath,
+				project: tt.fields.project,
+			}
+			if err := l.Prepare(); (err != nil) != tt.wantErr {
+				t.Errorf("Prepare() error = %v, wantErr %v", err, tt.wantErr)
+			}
+		})
+	}
+}
+
+func Test_local_Run(t *testing.T) {
+	mirror := defaultMirror
+	version, err := installVersion("1.1.3", &mirror)
+	if err != nil {
+		t.Error(err)
+		return
+	}
+
+	type fields struct {
+		version string
+		command []string
+		env     []string
+		output  io.Writer
+		tfpath  string
+		project *config.Project
+	}
+	tests := []struct {
+		name    string
+		fields  fields
+		wantErr bool
+	}{
+		{name: "success", fields: fields{
+			version: "1.1.3",
+			command: []string{"version"},
+			env:     nil,
+			output:  os.Stdout,
+			tfpath:  version,
+			project: &config.Project{},
+		}, wantErr: false},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			l := &local{
+				version: tt.fields.version,
+				command: tt.fields.command,
+				env:     tt.fields.env,
+				output:  tt.fields.output,
+				tfpath:  tt.fields.tfpath,
+				project: tt.fields.project,
+			}
+			if err := l.Run(); (err != nil) != tt.wantErr {
+				t.Errorf("Run() error = %v, wantErr %v", err, tt.wantErr)
+			}
+		})
+	}
+}
+
+func Test_local_RunUI(t *testing.T) {
+	mirror := defaultMirror
+	version, err := installVersion("1.1.3", &mirror)
+	if err != nil {
+		t.Error(err)
+		return
+	}
+
+	type fields struct {
+		version string
+		command []string
+		env     []string
+		output  io.Writer
+		tfpath  string
+		project *config.Project
+	}
+	type args struct {
+		ui terminal.UI
+	}
+	tests := []struct {
+		name    string
+		fields  fields
+		args    args
+		wantErr bool
+	}{
+		{
+			name: "success",
+			fields: fields{
+				version: "1.1.3",
+				command: []string{"version"},
+				env:     nil,
+				output:  os.Stdout,
+				tfpath:  version,
+				project: &config.Project{},
+			},
+			args:    args{ui: terminal.ConsoleUI(context.TODO(), true)},
+			wantErr: false,
+		},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			l := &local{
+				version: tt.fields.version,
+				command: tt.fields.command,
+				env:     tt.fields.env,
+				output:  tt.fields.output,
+				tfpath:  tt.fields.tfpath,
+				project: tt.fields.project,
+			}
+			if err := l.RunUI(tt.args.ui); (err != nil) != tt.wantErr {
+				t.Errorf("RunUI() error = %v, wantErr %v", err, tt.wantErr)
+			}
+		})
+	}
+}
+
+func home() string {
+	h, _ := os.UserHomeDir()
+	return h
+}