Add a test for the link group.

src/file.cpp

@@ -261,7 +261,7 @@ bool SolveSpaceUI::SaveToFile(const std::string &filename) {
     // will be exported. We reload the linked files because that rewrites
     // the linkFileRel for our possibly-new filename.
     SS.ScheduleShowTW();
-    SS.ReloadAllImported();
+    SS.ReloadAllImported(filename);
     SS.GenerateAll(SolveSpaceUI::Generate::ALL);
 
     fh = ssfopen(filename, "wb");

test/CMakeLists.txt

@@ -55,6 +55,7 @@ set(testsuite_SOURCES
     request/datum_point/test.cpp
     request/line_segment/test.cpp
     request/ttf_text/test.cpp
+    group/link/test.cpp
     group/translate_asy/test.cpp
     group/translate_nd/test.cpp
 )

test/group/link/test.cpp

@@ -0,0 +1,17 @@
+#include "harness.h"
+
+TEST_CASE(normal_roundtrip) {
+    CHECK_LOAD("normal.slvs");
+    CHECK_RENDER("normal.png");
+    CHECK_SAVE("normal.slvs");
+}
+
+TEST_CASE(normal_migrate_from_v20) {
+    CHECK_LOAD("normal_v20.slvs");
+    CHECK_SAVE("normal.slvs");
+}
+
+TEST_CASE(normal_migrate_from_v22) {
+    CHECK_LOAD("normal_v22.slvs");
+    CHECK_SAVE("normal.slvs");
+}

test/harness.cpp

@@ -116,6 +116,7 @@ static std::string PrepareSavefile(std::string data) {
         if(eqPos < nextLineBegin) {
             std::string key   = data.substr(lineBegin, eqPos - lineBegin),
                         value = data.substr(eqPos + 1, nextLineBegin - eqPos - 2);
+
             for(int i = 0; SolveSpaceUI::SAVED[i].type != 0; i++) {
                 if(SolveSpaceUI::SAVED[i].fmt  != 'f') continue;
                 if(SolveSpaceUI::SAVED[i].desc != key) continue;
@@ -126,6 +127,11 @@ static std::string PrepareSavefile(std::string data) {
                 std::copy(newValue.begin(), newValue.end(),
                           data.begin() + eqPos + 1);
             }
+
+            if(key == "Group.impFile") {
+                data.erase(lineBegin, nextLineBegin - lineBegin);
+                nextLineBegin = lineBegin;
+            }
         }
 
         size_t spPos = data.find(' ', lineBegin);