31798eb957
Reviewers: teon.banek, buda Reviewed By: buda Subscribers: pullbot Differential Revision: https://phabricator.memgraph.io/D891
80 lines
2.6 KiB
C++
80 lines
2.6 KiB
C++
// tests in this suite deal with edge cases in logical operator behavior
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// that's not easily testable with single-phase testing. instead, for
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// easy testing and latter readability they are tested end-to-end.
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#include "gmock/gmock.h"
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#include "gtest/gtest.h"
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#include "communication/result_stream_faker.hpp"
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#include "database/dbms.hpp"
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#include "query/interpreter.hpp"
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class QueryExecution : public testing::Test {
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protected:
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Dbms dbms_;
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std::unique_ptr<GraphDbAccessor> db_ = dbms_.active();
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/** Commits the current transaction and refreshes the db_
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* variable to hold a new accessor with a new transaction */
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void Commit() {
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db_->Commit();
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auto next_db = dbms_.active();
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db_.swap(next_db);
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}
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/** Executes the query and returns the results.
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* Does NOT commit the transaction */
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auto Execute(const std::string &query) {
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ResultStreamFaker results;
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query::Interpreter().Interpret(query, *db_, results, {}, false);
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return results.GetResults();
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}
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};
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TEST_F(QueryExecution, MissingOptionalIntoExpand) {
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// validating bug where expanding from Null (due to a preceeding optional
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// match) exhausts the expansion cursor, even if it's input is still not
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// exhausted
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Execute(
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"CREATE (a:Person {id: 1}), (b:Person "
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"{id:2})-[:Has]->(:Dog)-[:Likes]->(:Food )");
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Commit();
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ASSERT_EQ(Execute("MATCH (n) RETURN n").size(), 4);
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auto Exec = [this](bool desc, const std::string &edge_pattern) {
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// this test depends on left-to-right query planning
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FLAGS_query_cost_planner = false;
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return Execute(std::string("MATCH (p:Person) WITH p ORDER BY p.id ") +
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(desc ? "DESC " : "") +
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"OPTIONAL MATCH (p)-->(d:Dog) WITH p, d "
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"MATCH (d)" +
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edge_pattern +
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"(f:Food) "
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"RETURN p, d, f")
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.size();
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};
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std::string expand = "-->";
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std::string variable = "-[*1]->";
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std::string bfs = "-[*bfs..1]->";
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EXPECT_EQ(Exec(false, expand), 1);
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EXPECT_EQ(Exec(true, expand), 1);
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EXPECT_EQ(Exec(false, variable), 1);
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EXPECT_EQ(Exec(true, bfs), 1);
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EXPECT_EQ(Exec(true, bfs), 1);
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}
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TEST_F(QueryExecution, EdgeUniquenessInOptional) {
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// Validating that an edge uniqueness check can't fail when the edge is Null
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// due to optonal match. Since edge-uniqueness only happens in one OPTIONAL
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// MATCH, we only need to check that scenario.
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Execute("CREATE (), ()-[:Type]->()");
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Commit();
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ASSERT_EQ(Execute("MATCH (n) RETURN n").size(), 3);
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EXPECT_EQ(Execute("MATCH (n) OPTIONAL MATCH (n)-[r1]->(), (n)-[r2]->() "
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"RETURN n, r1, r2")
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.size(),
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3);
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}
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