[llvm] [MIR2Vec] Added create factory methods for Vocabulary (PR #162569)

[Mircea Trofin via llvm-commits]

================
@@ -214,4 +225,20 @@ TEST_F(MIR2VecVocabTestFixture, VocabularyConstruction) {
   EXPECT_GT(Count, 0u);
 }
 
+// Test factory method with empty vocabulary
+TEST_F(MIR2VecVocabTestFixture, EmptyVocabularyCreation) {
+  VocabMap EmptyVMap;
+
+  auto VocabOrErr = MIRVocabulary::create(std::move(EmptyVMap), *TII);
+  EXPECT_FALSE(static_cast<bool>(VocabOrErr))
+      << "Factory method should fail with empty vocabulary";
+
+  // Consume the error
+  if (!VocabOrErr) {
+    auto Err = VocabOrErr.takeError();
+    std::string ErrorMsg = toString(std::move(Err));
+    EXPECT_FALSE(ErrorMsg.empty());
+  }
+}
+
 } // namespace
----------------
mtrofin wrote:

newline missing

https://github.com/llvm/llvm-project/pull/162569