implement Path::dirname()

src/lib/src/Path.cc

@@ -16,8 +16,26 @@ namespace jes
 
     Path Path::dirname()
     {
-        // TODO
+        size_t i = m_path.size() - 1;
-        return "";
+        while (m_path[i] == '/')
+        {
+            if (i == 0)
+                return "/";
+            i--;
+        }
+        while (m_path[i] != '/')
+        {
+            if (i == 0)
+                return ".";
+            i--;
+        }
+        while (m_path[i] == '/')
+        {
+            if (i == 0)
+                return "/";
+            i--;
+        }
+        return std::string(m_path, 0, i + 1);
     }
 
     Path Path::join(const Path & other)

test/src/test_Path.cc

@@ -27,3 +27,14 @@ TEST(PathTest, joins_two_paths_together)
     EXPECT_EQ("C:/foo/../baz", Path("C:\\foo").join("../baz").to_s());
     EXPECT_EQ("/xyz/f.txt", Path("/xyz/").join("f.txt").to_s());
 }
+
+TEST(PathTest, dirname)
+{
+    EXPECT_EQ("/one/two", Path("/one/two/f.c").dirname().to_s());
+    EXPECT_EQ("C:/a", Path("C:\\a\\b\\").dirname().to_s());
+    EXPECT_EQ("/", Path("/").dirname().to_s());
+    EXPECT_EQ("/", Path("///foo").dirname().to_s());
+    EXPECT_EQ(".", Path("file.txt").dirname().to_s());
+    EXPECT_EQ(".", Path("folder//").dirname().to_s());
+    EXPECT_EQ("a", Path("a/b").dirname().to_s());
+}