Add tests for successful loading of image files

with image files that represent different tiff encodings

test_package/CMakeLists.txt

@@ -9,3 +9,9 @@ CONAN_BASIC_SETUP()
 
 ADD_EXECUTABLE(lena  lena.cpp)
 TARGET_LINK_LIBRARIES(lena ${CONAN_LIBS})
+
+ADD_EXECUTABLE(load-image load-image.cpp)
+TARGET_LINK_LIBRARIES(load-image ${CONAN_LIBS})
+configure_file(normal.tiff "${CMAKE_BINARY_DIR}/bin" COPYONLY)
+configure_file(jbig.tiff "${CMAKE_BINARY_DIR}/bin" COPYONLY)
+configure_file(lzma.tiff "${CMAKE_BINARY_DIR}/bin" COPYONLY)

test_package/conanfile.py

@@ -27,3 +27,5 @@ def test(self):
         shutil.copy(img_path, 'bin')
         with tools.chdir('bin'):
             self.run('lena.exe' if self.settings.os == 'Windows' else './lena', run_environment=True)
+            for image in ['lena.jpg', 'normal.tiff', 'lzma.tiff', 'jbig.tiff']:
+                self.run(('load-image.exe' if self.settings.os == 'Windows' else './load-image') + ' ' + image, run_environment=True)

test_package/load-image.cpp

@@ -0,0 +1,25 @@
+#include "opencv2/opencv.hpp"
+#include "opencv2/core/utils/logger.hpp"
+#include <iostream>
+#include <fstream>
+
+bool file_exists(const char *filepath) {
+	std::ifstream file(filepath);
+	return file.good();
+}
+
+int main( int argc, const char** argv ){
+    cv::utils::logging::setLogLevel(cv::utils::logging::LOG_LEVEL_DEBUG);
+    cv::Mat image = cv::imread(argv[1]);
+    if(!file_exists(argv[1])) {
+	    std::cerr << "File " << argv[1] << " does not exist!\n";
+	    return 1;
+    }
+    if(image.data == nullptr) {
+	std::cerr << "Error: could not load image " << argv[1] << "\n";
+	return 1;
+    } else {
+	std::cout << "Successfully load image " << argv[1] << " of size " << image.size() << "\n";
+	return 0;
+    }
+}