[libcxx-commits] [libcxx] [libc++] Make std::filesystem::canonical throw when given empty path (PR #77223)

[Mark de Wever via libcxx-commits]

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@@ -92,6 +92,26 @@ static void test_dne_path()
     }
 }
 
+static void test_empty_path() {
+  std::error_code ec = GetTestEC();
+  {
+    const path ret = canonical(path{}, ec);
+    assert(ec != GetTestEC());
+    assert(ec);
+    assert(ret == path{});
+  }
+  { TEST_THROWS_TYPE(filesystem_error, canonical(path{})); }
+
+  ec = GetTestEC();
+  {
+    const path ret = canonical("", ec);
+    assert(ec != GetTestEC());
+    assert(ec);
+    assert(ret == path{});
+  }
+  { TEST_THROWS_TYPE(filesystem_error, canonical("")); }
+}
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mordante wrote:

We don't need this test, elsewhere should be tested `path{} == ""`.

https://github.com/llvm/llvm-project/pull/77223