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Discard portion of right subtree that is within the edited region

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This commit is contained in:
Max Brunsfeld 2014-10-12 11:47:00 -07:00
parent 8c3ea6ef30
commit fb38140317
2 changed files with 57 additions and 20 deletions
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30
spec/runtime/parser_spec.cc
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@ -53,6 +53,18 @@ describe("Parser", [&]() {
AssertThat(new_size, Equals(prev_size - length));
};
auto replace_text = [&](size_t position, size_t length, string new_text) {
size_t prev_size = ts_node_size(root).bytes + ts_node_pos(root).bytes;
AssertThat(reader->erase(position, length), IsTrue());
AssertThat(reader->insert(position, new_text), IsTrue());
ts_document_edit(doc, { position, new_text.size(), length });
root = ts_document_root_node(doc);
size_t new_size = ts_node_size(root).bytes + ts_node_pos(root).bytes;
AssertThat(new_size, Equals(prev_size - length + new_text.size()));
};
describe("handling errors", [&]() {
before_each([&]() {
ts_document_set_language(doc, ts_language_json());
@ -362,6 +374,24 @@ describe("Parser", [&]() {
});
});
describe("replacing text", [&]() {
it("does not try to re-use nodes that are within the edited region", [&]() {
ts_document_set_language(doc, ts_language_javascript());
set_text("{ x: (b.c) };");
AssertThat(ts_node_string(root), Equals(
"(DOCUMENT (expression_statement (object "
"(identifier) (expression (property_access (identifier) (identifier))))))"));
replace_text(strlen("{ x: "), strlen("(b.c)"), "b.c");
AssertThat(ts_node_string(root), Equals(
"(DOCUMENT (expression_statement (object "
"(identifier) (property_access (identifier) (identifier)))))"));
});
});
describe("editing text inside a node containing a ubiquitous token", [&]() {
before_each([&]() {
set_text("123 *\n"