[apps/code] Add test on variable_box_controller

apps/code/test/variable_box_controller.cpp

@@ -0,0 +1,70 @@
+#include <quiz.h>
+#include "../script_store.h"
+#include "../variable_box_controller.h"
+#include <string.h>
+
+using namespace Code;
+
+void assert_variables_are(const char * script, const char * nameToComplete, const char * * expectedVariables, int expectedVariablesCount) {
+  // Clean the store
+  ScriptStore store;
+  store.deleteAllScripts();
+
+  // Add the script
+  store.addNewScript();
+  constexpr int dataBufferSize = 500;
+  char dataBuffer[dataBufferSize];
+  Ion::Storage::Record::Data data = {
+    .buffer = &dataBuffer,
+    .size = dataBufferSize
+  };
+  strcpy(dataBuffer, script);
+  constexpr int scriptIndex = 0;
+  store.scriptAtIndex(scriptIndex).setValue(data);
+
+  // Load the variable box
+  VariableBoxController varBox(&store);
+
+  const size_t nameToCompleteLength = strlen(nameToComplete);
+  varBox.loadFunctionsAndVariables(scriptIndex, nameToComplete, nameToCompleteLength);
+
+  // Compare the variables
+  int index = 0; // Index to make sure we are not cycling through the results
+  int textToInsertLength;
+  bool addParentheses;
+  for (int i = 0; i < expectedVariablesCount; i++) {
+    quiz_assert(i == index);
+    const char * autocompletionI = varBox.autocompletionAlternativeAtIndex(
+        nameToCompleteLength,
+        &textToInsertLength,
+        &addParentheses,
+        i,
+        &index);
+    quiz_assert(i == index); // If false, the autompletion has cycled: there are not as many results as expected
+    quiz_assert(strncmp(*(expectedVariables + i), autocompletionI - nameToCompleteLength, textToInsertLength + nameToCompleteLength) == 0);
+    index++;
+  }
+  varBox.autocompletionAlternativeAtIndex(
+      strlen(nameToComplete),
+      &textToInsertLength,
+      &addParentheses,
+      index,
+      &index);
+  /* Assert the autocompletion has cycles: otherwise, there are more results
+   * than expected. */
+  quiz_assert(index == 0);
+}
+
+QUIZ_CASE(variable_box_controller) {
+  const char * expectedVariables[] = {
+    "froo",
+    "from",
+    "frozenset()"
+  };
+  // FIXME This test does not load imported variables for now
+  assert_variables_are(
+      "from math import *\nfroo=3",
+      "fr",
+      expectedVariables,
+      sizeof(expectedVariables) / sizeof(const char *));
+}