add ruby turbine command test (#551)

cmd/meroxa/turbine/ruby/internal/cmd.go

@@ -0,0 +1,24 @@
+package internal
+
+import (
+	"fmt"
+	"os"
+	"os/exec"
+	"path"
+)
+
+func NewTurbineCmd(appPath string, env map[string]string) *exec.Cmd {
+	cmd := exec.Command("ruby", []string{
+		"-r", path.Join(appPath, "app"),
+		"-e", "Turbine.run",
+	}...)
+	cmd.Stdout = os.Stdout
+	cmd.Stderr = os.Stderr
+	cmd.Dir = appPath
+	cmd.Env = os.Environ()
+
+	for k, v := range env {
+		cmd.Env = append(cmd.Env, fmt.Sprintf("%s=%s", k, v))
+	}
+	return cmd
+}

cmd/meroxa/turbine/ruby/internal/cmd_test.go

@@ -0,0 +1,27 @@
+package internal_test
+
+import (
+	"os"
+	"testing"
+
+	"github.com/meroxa/cli/cmd/meroxa/turbine/ruby/internal"
+	"github.com/stretchr/testify/assert"
+)
+
+func Test_NewTurbineCmd(t *testing.T) {
+	cmd := internal.NewTurbineCmd("/my/path", map[string]string{
+		"foo": "bar",
+		"x":   "y",
+	})
+
+	assert.Equal(t, cmd.Stdout, os.Stdout)
+	assert.Equal(t, cmd.Stderr, os.Stderr)
+	assert.Equal(t, cmd.Dir, "/my/path")
+	assert.Equal(t, cmd.Args, []string{
+		"ruby",
+		"-r", "/my/path/app",
+		"-e", "Turbine.run",
+	})
+	assert.Contains(t, cmd.Env, "foo=bar")
+	assert.Contains(t, cmd.Env, "x=y")
+}

cmd/meroxa/turbine/ruby/run.go

@@ -2,24 +2,17 @@ package turbinerb
 
 import (
 	"context"
-	"fmt"
-	"os"
-	"os/exec"
-	"path"
+
+	"github.com/meroxa/cli/cmd/meroxa/turbine/ruby/internal"
 )
 
 func (t *turbineRbCLI) Run(ctx context.Context) error {
 	go t.runServer.Run(ctx)
 	defer t.runServer.GracefulStop()
 
-	cmd := exec.Command("ruby", []string{
-		"-r", path.Join(t.appPath, "app"),
-		"-e", "Turbine.run",
-	}...)
-	cmd.Env = append(os.Environ(), fmt.Sprintf("TURBINE_CORE_SERVER=%s", t.grpcListenAddress))
-	cmd.Stdout = os.Stdout
-	cmd.Stderr = os.Stderr
-	cmd.Dir = t.appPath
+	cmd := internal.NewTurbineCmd(t.appPath, map[string]string{
+		"TURBINE_CORE_SERVER": t.grpcListenAddress,
+	})
 
 	if err := cmd.Start(); err != nil {
 		t.logger.Errorf(ctx, err.Error())