(#25) Add a test verifying that the container receives the env vars

compose_test.go

@@ -1,8 +1,11 @@
 package testcontainers
 
 import (
+	"os/exec"
 	"strings"
 	"testing"
+
+	"github.com/stretchr/testify/assert"
 )
 
 func TestLocalDockerCompose(t *testing.T) {
@@ -24,8 +27,47 @@ func TestLocalDockerCompose(t *testing.T) {
 	defer destroyFn()
 }
 
+func TestLocalDockerComposeWithEnvironment(t *testing.T) {
+	path := "./testresources/docker-compose.yml"
+
+	identifier := strings.ToLower(RandomString(6))
+
+	compose := NewLocalDockerCompose(path, identifier)
+	destroyFn := func() {
+		err := compose.Down()
+		checkIfError(t, err)
+	}
+	defer destroyFn()
+
+	err := compose.
+		WithCommand([]string{"up", "-d"}).
+		WithEnv(map[string]string{
+			"foo": "BAR",
+		}).
+		Invoke()
+	checkIfError(t, err)
+
+	args := []string{
+		"exec", compose.Identifier + "_nginx_1", "env",
+	}
+
+	output, err := executeAndGetOutput("docker", args)
+	checkIfError(t, err)
+	assert.Contains(t, output, "bar=BAR")
+}
+
 func checkIfError(t *testing.T, err ExecError) {
 	if err.Error != nil || err.Stdout != nil || err.Stderr != nil {
 		t.Fatal(err)
 	}
 }
+
+func executeAndGetOutput(command string, args []string) (string, ExecError) {
+	cmd := exec.Command(command, args...)
+	out, err := cmd.CombinedOutput()
+	if err != nil {
+		return "", ExecError{Error: err}
+	}
+
+	return string(out), ExecError{Error: nil}
+}

testresources/docker-compose.yml

@@ -1,4 +1,6 @@
 version: '3'
 services:
   nginx:
-    image: nginx:stable-alpine
+    image: nginx:stable-alpine
+    environment:
+      bar: ${foo}