public void executeCommand_givenEnvironmentVariable_echoThatEnvVar() { env.put("SHELL_EXECUTOR", "foo"); String[] command = new String[] {"sh", "-c", "echo ${SHELL_EXECUTOR}"}; shellExecutor.executeCommand(env, asList(command)); List<String> out = shellExecutor.getStdOut(); assertEquals(1, out.size()); assertEquals("foo", out.get(0)); }