304 lines
10 KiB
C++
304 lines
10 KiB
C++
#include "runtime/runtime_spec_helper.h"
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#include "runtime/helpers/spy_reader.h"
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extern "C" const TSLanguage * ts_language_json();
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extern "C" const TSLanguage * ts_language_javascript();
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START_TEST
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describe("Document", [&]() {
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TSDocument *doc;
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before_each([&]() {
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doc = ts_document_make();
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});
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after_each([&]() {
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ts_document_free(doc);
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});
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describe("set_input", [&]() {
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SpyReader *reader;
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before_each([&]() {
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reader = new SpyReader("{ \"key\": [1, 2] }", 5);
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});
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after_each([&]() {
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delete reader;
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});
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describe("when the language is set", [&]() {
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before_each([&]() {
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ts_document_set_language(doc, ts_language_json());
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});
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it("parses the document", [&]() {
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SpyReader *reader = new SpyReader("{ \"key\": [1, 2] }", 5);
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ts_document_set_input(doc, reader->input);
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AssertThat(string(ts_node_string(ts_document_root_node(doc))), Equals(
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"(DOCUMENT (object (string) (array (number) (number))))"
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));
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});
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it("reads the entire input", [&]() {
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SpyReader *reader = new SpyReader("{ \"key\": [1, 2] }", 5);
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ts_document_set_input(doc, reader->input);
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AssertThat(reader->strings_read, Equals(vector<string>({
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"{ \"key\": [1, 2] }"
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})));
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});
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});
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describe("when the language is not set", [&]() {
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it("does not try to parse the document", [&]() {
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ts_document_set_input(doc, reader->input);
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AssertThat(ts_document_root_node(doc), Equals<TSNode *>(nullptr));
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});
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});
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});
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describe("edit", [&]() {
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SpyReader *reader;
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before_each([&]() {
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reader = new SpyReader("{ \"key\": [1, 2] }", 5);
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ts_document_set_language(doc, ts_language_json());
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ts_document_set_input(doc, reader->input);
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AssertThat(ts_node_string(ts_document_root_node(doc)), Equals(
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"(DOCUMENT (object (string) (array (number) (number))))"));
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});
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after_each([&]() {
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delete reader;
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});
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auto insert_text = [&](size_t position, string text) {
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reader->content.insert(position, text);
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ts_document_edit(doc, { position, 0, text.length() });
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};
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auto delete_text = [&](size_t position, size_t length) {
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reader->content.erase(position, length);
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ts_document_edit(doc, { position, length, 0 });
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};
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describe("inserting tokens near the end of the input", [&]() {
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it("updates the parse tree", [&]() {
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insert_text(
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string("{ \"key\": [1, 2]").length(),
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", \"key2\": 4");
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AssertThat(string(ts_node_string(ts_document_root_node(doc))), Equals(
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"(DOCUMENT (object (string) (array (number) (number)) (string) (number)))"));
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});
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it("re-reads only the changed portion of the input", [&]() {
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insert_text(
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string("{ \"key\": [1, 2]").length(),
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", \"key2\": 4");
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AssertThat(reader->strings_read.size(), Equals<size_t>(2));
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AssertThat(reader->strings_read[1], Equals(", \"key2\": 4 }"));
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});
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});
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describe("inserting text into an existing token", [&]() {
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it("updates the parse three", [&]() {
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insert_text(
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string("{ \"key").length(),
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"12345");
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AssertThat(string(ts_node_string(ts_document_root_node(doc))), Equals(
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"(DOCUMENT (object (string) (array (number) (number))))"));
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});
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});
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describe("deleting an important part of a token", [&]() {
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it("updates the parse tree, creating an error", [&]() {
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delete_text(
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string("{ \"key").length(),
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1);
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AssertThat(string(ts_node_string(ts_document_root_node(doc))), Equals(
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"(DOCUMENT (end))"));
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});
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});
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describe("inserting tokens near the beginning of the input", [&]() {
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it("updates the parse tree", [&]() {
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insert_text(
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string("{ ").length(),
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"\"key2\": 4, ");
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AssertThat(string(ts_node_string(ts_document_root_node(doc))), Equals(
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"(DOCUMENT (object (string) (number) (string) (array (number) (number))))"));
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});
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it_skip("re-reads only the changed portion of the input", [&]() {
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insert_text(
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string("{ ").length(),
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"\"key2\": 4, ");
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AssertThat(reader->strings_read.size(), Equals<size_t>(2));
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AssertThat(reader->strings_read[1], Equals("\"key2\": 4, "));
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});
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});
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});
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describe("parsing", [&]() {
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TSNode *root;
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describe("handling errors", [&]() {
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before_each([&]() {
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ts_document_set_language(doc, ts_language_json());
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});
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describe("when the error occurs at the beginning of a token", [&]() {
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it("computes the error node's size and position correctly", [&]() {
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ts_document_set_input_string(doc, " [123, @@@@@, true]");
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AssertThat(ts_node_string(ts_document_root_node(doc)), Equals(
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"(DOCUMENT (array (number) (ERROR '@') (true)))"));
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root = ts_document_root_node(doc);
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TSNode *array = ts_node_child(root, 0);
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TSNode *error = ts_node_child(array, 1);
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TSNode *last = ts_node_child(array, 2);
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AssertThat(ts_node_name(error), Equals("error"));
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AssertThat(ts_node_pos(error), Equals(string(" [123, ").length()))
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AssertThat(ts_node_size(error), Equals(string("@@@@@").length()))
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AssertThat(ts_node_name(last), Equals("true"));
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AssertThat(ts_node_pos(last), Equals(string(" [123, @@@@@, ").length()))
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ts_node_release(last);
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ts_node_release(error);
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ts_node_release(array);
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});
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});
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describe("when the error occurs in the middle of a token", [&]() {
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it("computes the error node's size and position correctly", [&]() {
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ts_document_set_input_string(doc, " [123, faaaaalse, true]");
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AssertThat(ts_node_string(ts_document_root_node(doc)), Equals(
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"(DOCUMENT (array (number) (ERROR 'a') (true)))"));
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root = ts_document_root_node(doc);
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TSNode *array = ts_node_child(root, 0);
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TSNode *error = ts_node_child(array, 1);
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TSNode *last = ts_node_child(array, 2);
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AssertThat(ts_node_name(error), Equals("error"));
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AssertThat(ts_node_pos(error), Equals(string(" [123, ").length()))
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AssertThat(ts_node_size(error), Equals(string("faaaaalse").length()))
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AssertThat(ts_node_name(last), Equals("true"));
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AssertThat(ts_node_pos(last), Equals(string(" [123, faaaaalse, ").length()))
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ts_node_release(last);
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ts_node_release(error);
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ts_node_release(array);
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});
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});
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describe("when the error occurs after one or more tokens", [&]() {
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it("computes the error node's size and position correctly", [&]() {
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ts_document_set_input_string(doc, " [123, true false, true]");
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AssertThat(ts_node_string(ts_document_root_node(doc)), Equals(
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"(DOCUMENT (array (number) (ERROR 'f') (true)))"));
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root = ts_document_root_node(doc);
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TSNode *array = ts_node_child(root, 0);
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TSNode *error = ts_node_child(array, 1);
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TSNode *last = ts_node_child(array, 2);
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AssertThat(ts_node_name(error), Equals("error"));
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AssertThat(ts_node_pos(error), Equals(string(" [123, ").length()))
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AssertThat(ts_node_size(error), Equals(string("true false").length()))
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AssertThat(ts_node_name(last), Equals("true"));
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AssertThat(ts_node_pos(last), Equals(string(" [123, true false, ").length()))
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ts_node_release(last);
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ts_node_release(error);
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ts_node_release(array);
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});
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});
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describe("when the error is an empty string", [&]() {
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it("computes the error node's size and position correctly", [&]() {
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ts_document_set_input_string(doc, " [123, , true]");
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AssertThat(ts_node_string(ts_document_root_node(doc)), Equals(
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"(DOCUMENT (array (number) (ERROR ',') (true)))"));
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root = ts_document_root_node(doc);
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TSNode *array = ts_node_child(root, 0);
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TSNode *error = ts_node_child(array, 1);
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TSNode *last = ts_node_child(array, 2);
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AssertThat(ts_node_name(error), Equals("error"));
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AssertThat(ts_node_pos(error), Equals(string(" [123, ").length()))
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AssertThat(ts_node_size(error), Equals<size_t>(0))
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AssertThat(ts_node_name(last), Equals("true"));
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AssertThat(ts_node_pos(last), Equals(string(" [123, , ").length()))
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ts_node_release(last);
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ts_node_release(error);
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ts_node_release(array);
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});
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});
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});
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describe("handling ubiquitous tokens", [&]() {
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// In the javascript example grammar, ASI works by using newlines as
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// terminators in statements, but also as ubiquitous tokens.
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before_each([&]() {
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ts_document_set_language(doc, ts_language_javascript());
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});
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describe("when the token appears as part of a grammar rule", [&]() {
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it("is incorporated into the tree", [&]() {
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ts_document_set_input_string(doc, "fn()\n");
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AssertThat(ts_node_string(ts_document_root_node(doc)), Equals(
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"(DOCUMENT (program (expression_statement (function_call (identifier)))))"));
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});
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});
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describe("when the token appears somewhere else", [&]() {
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it("is incorporated into the tree", [&]() {
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ts_document_set_input_string(doc,
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"fn()\n"
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" .otherFn();");
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AssertThat(ts_node_string(ts_document_root_node(doc)), Equals(
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"(DOCUMENT (program "
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"(expression_statement (function_call "
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"(property_access (function_call (identifier)) (identifier))))))"));
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});
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describe("when several ubiquitous tokens appear in a row", [&]() {
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it("is incorporated into the tree", [&]() {
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ts_document_set_input_string(doc,
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"fn()\n\n"
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"// This is a comment"
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"\n\n"
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".otherFn();");
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AssertThat(ts_node_string(ts_document_root_node(doc)), Equals(
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"(DOCUMENT (program "
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"(expression_statement (function_call "
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"(property_access (function_call (identifier)) "
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"(comment) "
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"(identifier))))))"));
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});
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});
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});
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});
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});
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});
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END_TEST
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