fix: Address function_ent comments around naming and tests

functions/snippets/src/main/java/Env.java → functions/snippets/src/main/java/EnvVars.java

@@ -20,8 +20,14 @@
 import javax.servlet.http.HttpServletRequest;
 import javax.servlet.http.HttpServletResponse;
 
-public class Env {
-  public void env(HttpServletRequest request, HttpServletResponse response)
+public class EnvVars {
+  /**
+   * Returns the environment variable "foo" set during function deployment.
+   * @param request The Servlet HTTP request.
+   * @param response The Servlet HTTP response.
+   * @throws IOException If there is an I/O writer exception.
+   */
+  public void envVar(HttpServletRequest request, HttpServletResponse response)
       throws IOException {
     PrintWriter writer = response.getWriter();
     String foo = System.getenv("FOO");

functions/snippets/src/test/java/SnippetsTests.java

@@ -162,7 +162,8 @@ public void helloBackgroundTest() throws IOException {
 
   @Test
   public void envTest() throws IOException {
-    new Env().env(request, response);
-    assertThat(responseOut.toString(), containsString(""));
+    new EnvVars().envVar(request, response);
+    when(System.getenv("FOO")).thenReturn("BAR");
+    assertThat(responseOut.toString(), containsString("BAR"));
   }
 }