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Avoid mutating the root node for out-of-bounds edits

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This commit is contained in:
Max Brunsfeld 2018-07-13 16:03:01 -07:00
parent 0f0adfb681
commit d54412266e
2 changed files with 96 additions and 74 deletions
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37
test/runtime/subtree_test.cc
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@ -378,6 +378,43 @@ describe("Subtree", []() {
AssertThat(tree->children.contents[0]->has_changes, IsTrue());
});
});
describe("insertions at the end of the tree", [&]() {
it("extends the tree's content", [&]() {
TSInputEdit edit;
edit.start_byte = 15;
edit.old_end_byte = 15;
edit.new_end_byte = 16;
edit.start_point = {0, 15};
edit.old_end_point = {0, 15};
edit.new_end_point = {0, 16};
tree = ts_subtree_edit(tree, &edit, &pool);
assert_consistent(tree);
AssertThat(tree->size.bytes, Equals(14u));
AssertThat(tree->children.contents[2]->has_changes, IsTrue());
AssertThat(tree->children.contents[2]->size.bytes, Equals(4u));
});
});
describe("edits beyond the end of the tree", [&]() {
it("does not change the tree", [&]() {
TSInputEdit edit;
edit.start_byte = 15;
edit.old_end_byte = 16;
edit.new_end_byte = 17;
edit.start_point = {0, 15};
edit.old_end_point = {0, 16};
edit.new_end_point = {0, 17};
tree = ts_subtree_edit(tree, &edit, &pool);
assert_consistent(tree);
AssertThat(tree->size.bytes, Equals(13u));
AssertThat(tree->children.contents[2]->size.bytes, Equals(3u));
});
});
});
describe("eq", [&]() {