From 2ec43b98cea7764fd96faf0fdf040e65c422d832 Mon Sep 17 00:00:00 2001
From: jorg-vr <jorg.vr@live.be>
Date: Mon, 29 Jul 2024 16:19:20 +0200
Subject: [PATCH] Add file function test

---
 .../echo-function-file/solution/correct.cpp   | 26 +++++++++++++++++++
 1 file changed, 26 insertions(+)
 create mode 100644 tests/exercises/echo-function-file/solution/correct.cpp

diff --git a/tests/exercises/echo-function-file/solution/correct.cpp b/tests/exercises/echo-function-file/solution/correct.cpp
new file mode 100644
index 00000000..3e722807
--- /dev/null
+++ b/tests/exercises/echo-function-file/solution/correct.cpp
@@ -0,0 +1,26 @@
+#include <iostream>
+#include <fstream>
+#include <string>
+#include <algorithm>
+#include <cctype>
+
+std::string trim(const std::string& str) {
+    std::string trimmed = str;
+    trimmed.erase(trimmed.begin(), std::find_if(trimmed.begin(), trimmed.end(), [](int ch) {
+        return !std::isspace(ch);
+    }));
+    trimmed.erase(std::find_if(trimmed.rbegin(), trimmed.rend(), [](int ch) {
+        return !std::isspace(ch);
+    }).base(), trimmed.end());
+    return trimmed;
+}
+
+std::string echo_file(const std::string& filename) {
+    std::ifstream file(filename);
+    if (!file) {
+        return "Error: Failed to open file.";
+    }
+
+    std::string content((std::istreambuf_iterator<char>(file)), std::istreambuf_iterator<char>());
+    return trim(content);
+}