mirror of
https://github.com/danog/psalm.git
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463 lines
16 KiB
PHP
463 lines
16 KiB
PHP
<?php
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namespace Psalm\Tests\TypeReconciliation;
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class EmptyTest extends \Psalm\Tests\TestCase
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{
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use \Psalm\Tests\Traits\InvalidCodeAnalysisTestTrait;
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use \Psalm\Tests\Traits\ValidCodeAnalysisTestTrait;
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/**
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* @return iterable<string,array{string,assertions?:array<string,string>,error_levels?:string[]}>
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*/
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public function providerValidCodeParse(): iterable
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{
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return [
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'ifNotUndefinedAndEmpty' => [
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'<?php
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$a = !empty($b) ? $b : null;',
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'assertions' => [
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'$a' => 'mixed|null',
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],
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'error_levels' => ['MixedAssignment'],
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],
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'emptyArrayVar' => [
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'<?php
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function a(array $in): void
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{
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$r = [];
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foreach ($in as $entry) {
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if (!empty($entry["a"])) {
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$r[] = [];
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}
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if (empty($entry["a"])) {
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$r[] = [];
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}
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}
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}
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function b(array $in): void
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{
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$i = 0;
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foreach ($in as $entry) {
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if (!empty($entry["a"])) {
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$i--;
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}
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if (empty($entry["a"])) {
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$i++;
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}
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}
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}
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function c(array $in): void
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{
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foreach ($in as $entry) {
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if (!empty($entry["a"])) {}
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}
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foreach ($in as $entry) {
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if (empty($entry["a"])) {}
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}
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}',
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'assertions' => [],
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'error_levels' => ['MixedAssignment', 'MixedArrayAccess'],
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],
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'removeEmptyArray' => [
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'<?php
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$arr_or_string = [];
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if (rand(0, 1)) {
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$arr_or_string = "hello";
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}
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/** @return void **/
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function foo(string $s) {}
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if (!empty($arr_or_string)) {
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foo($arr_or_string);
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}',
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],
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'emptyArrayReconciliationThenIf' => [
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'<?php
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/**
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* @param string|string[] $a
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*/
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function foo($a): string {
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if (is_string($a)) {
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return $a;
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} elseif (empty($a)) {
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return "goodbye";
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}
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if (isset($a[0])) {
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return $a[0];
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};
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return "not found";
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}',
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],
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'emptyStringReconciliationThenIf' => [
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'<?php
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/**
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* @param Exception|string|string[] $a
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*/
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function foo($a): string {
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if (is_array($a)) {
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return "hello";
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} elseif (empty($a)) {
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return "goodbye";
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}
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if (is_string($a)) {
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return $a;
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};
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return "an exception";
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}',
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],
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'emptyExceptionReconciliationAfterIf' => [
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'<?php
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/**
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* @param Exception|null $a
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*/
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function foo($a): string {
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if ($a && $a->getMessage() === "hello") {
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return "hello";
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} elseif (empty($a)) {
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return "goodbye";
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}
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return $a->getMessage();
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}',
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],
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'noFalsyLeak' => [
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'<?php
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function foo(string $s): void {
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if (empty($s) || $s === "hello") {}
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}',
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],
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'noRedundantConditionOnMixed' => [
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'<?php
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function testarray(array $data): void {
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foreach ($data as $item) {
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if (!empty($item["a"]) && !empty($item["b"]["c"])) {
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echo "Found\n";
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}
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}
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}',
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'assertions' => [],
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'error_levels' => ['MixedAssignment', 'MixedArrayAccess'],
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],
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'dontBleedEmptyAfterExtract' => [
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'<?php
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function foo(array $args): void {
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extract($args);
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if ((empty($arr) && empty($a)) || $c === 0) {
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} else {
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foreach ($arr as $b) {}
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}
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}',
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'assertions' => [],
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'error_levels' => ['MixedAssignment', 'MixedArgument'],
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],
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'emptyTKeyedArray' => [
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'<?php
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$arr = [
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"profile" => [
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"foo" => "bar",
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],
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"groups" => [
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"foo" => "bar",
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"hide" => rand(0, 5),
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],
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];
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foreach ($arr as $item) {
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if (empty($item["hide"]) || $item["hide"] === 3) {}
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}',
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],
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'alwaysBoolResult' => [
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'<?php
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function takesBool(bool $p): void {}
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takesBool(empty($q));',
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],
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'noRedundantConditionAfterFalsyIntChecks' => [
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'<?php
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function foo(int $t) : void {
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if (!$t) {
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foreach ([0, 1, 2] as $a) {
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if (!$t) {
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$t = $a;
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}
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}
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}
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}',
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],
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'noRedundantConditionAfterEmptyMixedChecks' => [
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'<?php
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function foo($t) : void {
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if (empty($t)) {
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foreach ($_GET["u"] as $a) {
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if (empty($t)) {
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$t = $a;
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}
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}
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}
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}',
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'assertions' => [],
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'error_levels' => ['MixedAssignment', 'MissingParamType'],
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],
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'canBeNonEmptyArray' => [
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'<?php
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function _processScopes($scopes) : void {
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if (!is_array($scopes) && !empty($scopes)) {
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$scopes = explode(" ", trim($scopes));
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} else {
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// false is allowed here
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}
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if (empty($scopes)){}
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}',
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'assertions' => [],
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'error_levels' => ['MixedAssignment', 'MissingParamType', 'MixedArgument'],
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],
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'multipleEmptiesInCondition' => [
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'<?php
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/** @param array<int, int> $o */
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function foo(array $o) : void {
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if (empty($o[0]) && empty($o[1])) {}
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}',
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],
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'multipleEmptiesInConditionWithMixedOffset' => [
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'<?php
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/** @param array $o */
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function foo(array $o) : void {
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if (empty($o[0]) && empty($o[1])) {}
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}',
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],
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'unsetChangesArrayEmptiness' => [
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'<?php
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function foo(array $n): void {
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if (empty($n)) {
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return;
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}
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while (!empty($n)) {
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unset($n[rand(0, 10)]);
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}
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}',
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],
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'unsetChangesComplicatedArrayEmptiness' => [
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'<?php
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function contains(array $data, array $needle): bool {
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if (empty($data) || empty($needle)) {
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return false;
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}
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$stack = [];
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while (!empty($needle)) {
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$key = key($needle);
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if ($key === null) continue;
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$val = $needle[$key];
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unset($needle[$key]);
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if (array_key_exists($key, $data) && is_array($val)) {
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$next = $data[$key];
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unset($data[$key]);
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if (!empty($val)) {
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$stack[] = [$val, $next];
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}
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} elseif (!array_key_exists($key, $data) || $data[$key] != $val) {
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return false;
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}
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if (empty($needle) && !empty($stack)) {
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list($needle, $data) = array_pop($stack);
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}
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}
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return true;
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}',
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'assertions' => [],
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'error_levels' => ['MixedAssignment', 'MissingParamType', 'MixedArgument', 'MixedArrayOffset', 'MixedArrayAccess'],
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],
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'possiblyEmptyIterable' => [
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'<?php
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function foo(iterable $i) : void {
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if (empty($i)) {}
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if (!empty($i)) {}
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}',
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],
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'allowEmptyClassConstantOffsetCheck' => [
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'<?php
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class Foo {
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const BAR = "bar";
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const ONE = 1;
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}
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/**
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* @param array<string,string> $data
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*/
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function bat(array $data) : void {
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if (!empty($data["foo"])) {
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if (empty($data[Foo::BAR])) {}
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}
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}
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/**
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* @param array<int,string> $data
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*/
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function baz(array $data) : void {
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if (!empty($data[0])) {
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if (empty($data[Foo::ONE])) {}
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}
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}',
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],
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'doubleEmptyCheckTwoArrays' => [
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'<?php
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function foo(array $a, array $b) : void {
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if (empty($a) && empty($b)) {}
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}',
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],
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'doubleEmptyCheckOnTKeyedArray' => [
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'<?php
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/**
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* @param array{a: array, b: array} $arr
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*/
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function foo(array $arr) : void {
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if (empty($arr["a"]) && empty($arr["b"])) {}
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}',
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],
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'doubleEmptyCheckOnTKeyedArrayVariableOffsets' => [
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'<?php
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function foo(int $i, int $j) : void {
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$arr = [];
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$arr[0] = rand(0, 1);
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$arr[1] = rand(0, 1);
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if (empty($arr[$i]) && empty($arr[$j])) {}
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}',
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],
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'checkArrayEmptyUnknownRoot' => [
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'<?php
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function foo(array $arr) : void {
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if (empty($arr[rand(0, 1)])) {
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if ($arr) {}
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}
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}',
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],
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'allowEmptyCheckOnPossiblyNullPropertyFetch' => [
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'<?php
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class A {
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public bool $b = false;
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}
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function foo(?A $a) : void {
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if (!empty($a->b)) {}
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}',
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],
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'allowNumericEmpty' => [
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'<?php
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/**
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* @param numeric $p
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*/
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function f($p): bool {
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if (empty($p)) {
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return false;
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}
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return true;
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}'
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],
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'possiblyUndefinedArrayOffset' => [
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'<?php
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$d = [];
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if (!rand(0,1)) {
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$d[0] = "a";
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}
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if (empty($d[0])) {}'
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],
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'reconcileNonEmptyArrayKey' => [
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'<?php
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/**
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* @param array{a?: string, b: string} $arr
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*/
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function createFromString(array $arr): void
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{
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if (empty($arr["a"])) {
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return;
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}
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echo $arr["a"];
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}'
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],
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];
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}
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/**
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* @return iterable<string,array{string,error_message:string,2?:string[],3?:bool,4?:string}>
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*/
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public function providerInvalidCodeParse(): iterable
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{
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return [
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'preventImpossibleEmpty' => [
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'<?php
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function foo(array $arr) : void {
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if (empty($ar)) {
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// do something
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}
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}',
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'error_message' => 'UndefinedVariable',
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],
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'reconciliationForMixed' => [
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'<?php
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function foo(array $arr) : void {
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$a = empty($arr["a"]) ? "" : $arr["a"];
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if ($a) {
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if ($a) {}
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}
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}',
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'error_message' => 'RedundantCondition',
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'error_levels' => ['MixedAssignment', 'MissingParamType'],
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],
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'preventEmptyOnBool' => [
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'<?php
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function foo(bool $b) : void {
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if (!empty($b)) {}
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}',
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'error_message' => 'InvalidArgument',
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],
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'preventEmptyCreatingArray' => [
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'<?php
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/** @return array{a:mixed} */
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function foo(array $r) {
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if (!empty($r["a"])) {}
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return $r;
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}',
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'error_message' => 'MixedReturnTypeCoercion'
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],
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'preventEmptyEquivalentCreatingArray' => [
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'<?php
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/** @return array{a:mixed} */
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function foo(array $r) {
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if (isset($r["a"]) && $r["a"]) {}
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return $r;
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}',
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'error_message' => 'MixedReturnTypeCoercion'
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],
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'secondEmptyTwice' => [
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'<?php
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/**
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* @param array{a?:int,b?:string} $p
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*/
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function f(array $p) : void {
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if (empty($p)) {
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throw new RuntimeException("");
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}
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assert(!empty($p));
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}',
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'error_message' => 'RedundantCondition'
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],
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];
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}
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}
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