Add zip test

Author: adazem009

test/CMakeLists.txt

@@ -14,3 +14,4 @@ set(gtest_force_shared_crt ON CACHE BOOL "" FORCE)
 enable_testing()
 
 include(GoogleTest)
+add_subdirectory(zip)

test/zip/CMakeLists.txt

@@ -0,0 +1,12 @@
+add_executable(
+  zip_test
+  zip_test.cpp
+)
+
+target_link_libraries(
+  zip_test
+  GTest::gtest_main
+  zip
+)
+
+gtest_discover_tests(zip_test)

test/zip/zip_test.cpp

@@ -0,0 +1,52 @@
+#include <gtest/gtest.h>
+#include <zip.h>
+#include <filesystem>
+#include "../common.h"
+
+std::string readSb3Json(const std::string &fileName)
+{
+    // TODO: Move this to a class and use it in Scratch3Reader
+    // Open the zip file
+    unsigned char *buf;
+    size_t bufsize;
+    struct zip_t *zip = zip_open(fileName.c_str(), 0, 'r');
+
+    // Extract project.json
+    zip_entry_open(zip, "project.json");
+    bufsize = zip_entry_size(zip);
+    buf = (unsigned char *)calloc(sizeof(unsigned char), bufsize);
+    zip_entry_noallocread(zip, (void *)buf, bufsize);
+    zip_entry_close(zip);
+    std::string str(reinterpret_cast<char const *>(buf));
+    free(buf);
+
+    // Remove garbage after the JSON
+    int end;
+    for (end = str.size(); end >= 0; end--) {
+        char ch = str[end];
+        if (ch == '}') {
+            break;
+        }
+    }
+    return str.substr(0, end + 1);
+}
+
+TEST(ZipTest, EmptyProject)
+{
+    ASSERT_EQ(readSb3Json("empty_project.sb3"), readFileStr("empty_project.json"));
+}
+
+TEST(ZipTest, DefaultProject)
+{
+    ASSERT_EQ(readSb3Json("default_project.sb3"), readFileStr("default_project.json"));
+}
+
+TEST(ZipTest, BubbleSort)
+{
+    ASSERT_EQ(readSb3Json("bubble_sort.sb3"), readFileStr("bubble_sort.json"));
+}
+
+TEST(ZipTest, FileManager)
+{
+    ASSERT_EQ(readSb3Json("file_manager.sb3"), readFileStr("file_manager.json"));
+}