COMPMID-742: Add image input support for Harris Corners tests

Change-Id: I4833eec0734776d8683fe867bb4f4d827f1a2fb7
Reviewed-on: https://eu-gerrit-1.euhpc.arm.com/115503
Tested-by: Jenkins <bsgcomp@arm.com>
Reviewed-by: Georgios Pinitas <georgios.pinitas@arm.com>
diff --git a/tests/datasets/ImageFileDatasets.h b/tests/datasets/ImageFileDatasets.h
new file mode 100644
index 0000000..90a7f0d
--- /dev/null
+++ b/tests/datasets/ImageFileDatasets.h
@@ -0,0 +1,120 @@
+/*
+ * Copyright (c) 2018 ARM Limited.
+ *
+ * SPDX-License-Identifier: MIT
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to
+ * deal in the Software without restriction, including without limitation the
+ * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
+ * sell copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+#ifndef ARM_COMPUTE_TEST_IMAGE_FILE_DATASET
+#define ARM_COMPUTE_TEST_IMAGE_FILE_DATASET
+
+#include "tests/framework/datasets/Datasets.h"
+
+#include <type_traits>
+
+namespace arm_compute
+{
+namespace test
+{
+namespace datasets
+{
+class ImageFileDataset
+{
+public:
+    struct iterator
+    {
+        iterator(std::vector<std::string>::const_iterator name_it)
+            : _name_it{ std::move(name_it) }
+        {
+        }
+
+        std::string description() const
+        {
+            std::stringstream description;
+            description << "ImageFile=" << *_name_it;
+            return description.str();
+        }
+
+        std::tuple<std::string> operator*() const
+        {
+            return std::make_tuple(*_name_it);
+        }
+
+        iterator &operator++()
+        {
+            ++_name_it;
+
+            return *this;
+        }
+
+    private:
+        std::vector<std::string>::const_iterator _name_it;
+    };
+
+    iterator begin() const
+    {
+        return iterator(_names.begin());
+    }
+
+    int size() const
+    {
+        return _names.size();
+    }
+
+    void add_image_file(std::string name)
+    {
+        _names.emplace_back(std::move(name));
+    }
+
+protected:
+    ImageFileDataset()                    = default;
+    ImageFileDataset(ImageFileDataset &&) = default;
+
+private:
+    std::vector<std::string> _names{};
+};
+
+/** Data set containing names of small image files. */
+class SmallImageFiles final : public ImageFileDataset
+{
+public:
+    SmallImageFiles()
+    {
+        add_image_file("640x480.ppm");
+        add_image_file("800x600.ppm");
+        add_image_file("1280x720.ppm");
+    }
+};
+
+/** Data set containing names of small image files. */
+class LargeImageFiles final : public ImageFileDataset
+{
+public:
+    LargeImageFiles()
+    {
+        add_image_file("1920x1080.ppm");
+        add_image_file("4160x3120.ppm");
+        add_image_file("5120x3200.ppm");
+    }
+};
+
+} // namespace datasets
+} // namespace test
+} // namespace arm_compute
+#endif /* ARM_COMPUTE_TEST_IMAGE_FILE_DATASET */