add Path::listdir()

src/core/Path.cc

@@ -2,6 +2,7 @@
 #include <sys/types.h>
 #include <sys/stat.h>
 #include <unistd.h>
+#include <dirent.h>
 
 std::string Path::dirname(const std::string & s)
 {
@@ -54,3 +55,21 @@ bool Path::is_dir(const std::string & s)
     }
     return S_ISDIR(st.st_mode);
 }
+
+std::shared_ptr<std::vector<std::shared_ptr<std::string>>> Path::listdir(const std::string & path)
+{
+    std::shared_ptr<std::vector<std::shared_ptr<std::string>>> result = std::make_shared<std::vector<std::shared_ptr<std::string>>>();
+
+    DIR * dir = opendir(path.c_str());
+    if (dir != nullptr)
+    {
+        struct dirent * ent;
+        while ((ent = readdir(dir)) != nullptr)
+        {
+            result->push_back(std::make_shared<std::string>(ent->d_name));
+        }
+        closedir(dir);
+    }
+
+    return result;
+}

src/core/Path.h

@@ -2,6 +2,8 @@
 #define PATH_H
 
 #include <string>
+#include <vector>
+#include <memory>
 
 class Path
 {
@@ -16,6 +18,7 @@ public:
 
     static bool is_file(const std::string & s);
     static bool is_dir(const std::string & s);
+    static std::shared_ptr<std::vector<std::shared_ptr<std::string>>> listdir(const std::string & path);
 
 protected:
     static std::string _join(const std::string & first, const std::string & second);

test/src/test_Path.cc

@@ -1,5 +1,6 @@
 #include "gtest/gtest.h"
 #include "Path.h"
+#include <algorithm>
 
 TEST(Path_dirname, returns_dot_when_no_directory_component)
 {
@@ -98,3 +99,13 @@ TEST(Path_is_dir, returns_false_for_nonexistent_path)
 {
     EXPECT_FALSE(Path::is_dir("non.existent"));
 }
+
+
+TEST(Path_listdir, returns_list_of_directory_contents)
+{
+    auto dir_ents = Path::listdir("test");
+    EXPECT_NE(dir_ents->end(), std::find_if(dir_ents->begin(), dir_ents->end(), [](std::shared_ptr<std::string> & s) { return *s == "."; }));
+    EXPECT_NE(dir_ents->end(), std::find_if(dir_ents->begin(), dir_ents->end(), [](std::shared_ptr<std::string> & s) { return *s == ".."; }));
+    EXPECT_NE(dir_ents->end(), std::find_if(dir_ents->begin(), dir_ents->end(), [](std::shared_ptr<std::string> & s) { return *s == "src"; }));
+    EXPECT_EQ(dir_ents->end(), std::find_if(dir_ents->begin(), dir_ents->end(), [](std::shared_ptr<std::string> & s) { return *s == "foo"; }));
+}