mirror of
https://github.com/danog/psalm.git
synced 2024-11-27 04:45:20 +01:00
944 lines
32 KiB
PHP
944 lines
32 KiB
PHP
<?php
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namespace Psalm\Tests;
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class TypeAlgebraTest extends TestCase
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{
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use Traits\FileCheckerInvalidCodeParseTestTrait;
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use Traits\FileCheckerValidCodeParseTestTrait;
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/**
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* @return array
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*/
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public function providerFileCheckerValidCodeParse()
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{
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return [
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'twoVarLogic' => [
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'<?php
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function takesString(string $s): void {}
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function foo(?string $a, ?string $b): void {
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if ($a !== null || $b !== null) {
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if ($a !== null) {
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$c = $a;
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} else {
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$c = $b;
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}
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takesString($c);
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}
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}',
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],
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'threeVarLogic' => [
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'<?php
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function takesString(string $s): void {}
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function foo(?string $a, ?string $b, ?string $c): void {
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if ($a !== null || $b !== null || $c !== null) {
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if ($a !== null) {
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$d = $a;
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} elseif ($b !== null) {
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$d = $b;
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} else {
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$d = $c;
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}
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takesString($d);
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}
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}',
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],
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'twoVarLogicNotNested' => [
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'<?php
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function foo(?string $a, ?string $b): string {
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if (!$a && !$b) return "bad";
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if (!$a) return $b;
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return $a;
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}',
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],
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'twoVarLogicNotNestedWithAllPathsReturning' => [
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'<?php
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function foo(?string $a, ?string $b): string {
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if (!$a && !$b) {
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return "bad";
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} else {
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if (!$a) {
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return $b;
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} else {
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return $a;
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}
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}
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}',
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],
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'twoVarLogicNotNestedWithAssignmentBeforeReturn' => [
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'<?php
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function foo(?string $a, ?string $b): string {
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if (!$a && !$b) {
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$a = 5;
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return "bad";
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}
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if (!$a) {
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$a = 7;
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return $b;
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}
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return $a;
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}',
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],
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'invertedTwoVarLogicNotNested' => [
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'<?php
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function foo(?string $a, ?string $b): string {
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if ($a || $b) {
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// do nothing
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} else {
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return "bad";
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}
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if (!$a) return $b;
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return $a;
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}',
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],
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'invertedTwoVarLogicNotNestedWithAssignmentBeforeReturn' => [
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'<?php
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function foo(?string $a, ?string $b): string {
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if ($a || $b) {
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// do nothing
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} else {
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$a = 5;
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return "bad";
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}
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if (!$a) return $b;
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return $a;
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}',
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],
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'twoVarLogicNotNestedWithElseifAndNoNegations' => [
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'<?php
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function foo(?string $a, ?string $b): string {
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if ($a) {
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// do nothing
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} elseif ($b) {
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// do nothing here
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} else {
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return "bad";
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}
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if (!$a) return $b;
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return $a;
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}',
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],
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'threeVarLogicNotNestedWithNoRedefinitionsWithClasses' => [
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'<?php
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function foo(?stdClass $a, ?stdClass $b, ?stdClass $c): stdClass {
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if ($a) {
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// do nothing
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} elseif ($b) {
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// do nothing here
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} elseif ($c) {
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// do nothing here
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} else {
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return new stdClass;
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}
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if (!$a && !$b) return $c;
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if (!$a) return $b;
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return $a;
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}',
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],
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'threeVarLogicNotNestedWithNoRedefinitionsWithStrings' => [
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'<?php
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function foo(?string $a, ?string $b, ?string $c): string {
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if ($a) {
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// do nothing
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} elseif ($b) {
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// do nothing here
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} elseif ($c) {
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// do nothing here
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} else {
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return "bad";
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}
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if (!$a && !$b) return $c;
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if (!$a) return $b;
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return $a;
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}',
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],
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'threeVarLogicNotNestedAndOrWithNoRedefinitions' => [
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'<?php
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function foo(?string $a, ?string $b, ?string $c): string {
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if ($a) {
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// do nothing
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} elseif ($b || $c) {
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// do nothing here
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} else {
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return "bad";
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}
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if (!$a && !$b) return $c;
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if (!$a) return $b;
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return $a;
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}',
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],
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'twoVarLogicNotNestedWithElseifCorrectlyNegatedInElseIf' => [
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'<?php
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function foo(?string $a, ?string $b): string {
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if ($a) {
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// do nothing here
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} elseif ($b) {
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$a = null;
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} else {
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return "bad";
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}
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if (!$a) return $b;
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return $a;
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}',
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],
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'nestedReassignment' => [
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'<?php
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function foo(?string $a): void {
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if ($a === null) {
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$a = "blah-blah";
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} else {
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$a = rand(0, 1) ? "blah" : null;
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if ($a === null) {
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}
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}
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}',
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],
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'twoVarLogicNotNestedWithElseifCorrectlyReinforcedInIf' => [
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'<?php
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class A {}
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class B extends A {}
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function foo(?A $a, ?A $b): A {
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if ($a) {
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$a = new B;
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} elseif ($b) {
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// do nothing
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} else {
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return new A;
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}
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if (!$a) return $b;
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return $a;
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}',
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],
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'differentValueChecks' => [
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'<?php
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function foo(string $a): void {
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if ($a === "foo") {
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// do something
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} elseif ($a === "bar") {
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// can never get here
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}
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}',
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],
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'repeatedSet' => [
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'<?php
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function foo(): void {
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if ($a = rand(0, 1) ? "" : null) {
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return;
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}
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if (rand(0, 1)) {
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$a = rand(0, 1) ? "hello" : null;
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if ($a) {
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}
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}
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}',
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],
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'repeatedSetInsideWhile' => [
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'<?php
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function foo(): void {
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if ($a = rand(0, 1) ? "" : null) {
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return;
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} else {
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while (rand(0, 1)) {
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$a = rand(0, 1) ? "hello" : null;
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}
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if ($a) {
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}
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}
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}',
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],
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'byRefAssignment' => [
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'<?php
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function foo(): void {
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preg_match("/hello/", "hello molly", $matches);
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if (!$matches) {
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return;
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}
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preg_match("/hello/", "hello dolly", $matches);
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if (!$matches) {
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}
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}',
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],
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'orConditionalAfterAndConditional' => [
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'<?php
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function foo(string $a, string $b): void {
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if ($a && $b) {
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echo "a";
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} elseif ($a || $b) {
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echo "b";
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}
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}',
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],
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'issetOnOneStringAfterAnother' => [
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'<?php
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/** @param string[] $arr */
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function foo(array $arr): void {
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$a = "a";
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if (!isset($arr[$a])) {
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return;
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}
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foreach ([0, 1, 2, 3] as $i) {
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if (!isset($arr[$a . $i])) {
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echo "a";
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}
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$a = "hello";
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}
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}',
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],
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'noParadoxInLoop' => [
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'<?php
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function paradox2(): void {
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$condition = rand() % 2 > 0;
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if (!$condition) {
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foreach ([1, 2] as $value) {
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if ($condition) { }
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$condition = true;
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}
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}
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}',
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],
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'noParadoxInListAssignment' => [
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'<?php
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function foo(string $a): void {
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if (!$a) {
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list($a) = explode(":", "a:b");
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if ($a) { }
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}
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}',
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],
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'noParadoxAfterAssignment' => [
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'<?php
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function get_bool(): bool {
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return rand() % 2 > 0;
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}
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function leftover(): bool {
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$res = get_bool();
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if ($res === false) {
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return true;
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}
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$res = get_bool();
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if ($res === false) {
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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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'noParadoxAfterArrayAppending' => [
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'<?php
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/** @return array|false */
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function array_append2(array $errors) {
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if ($errors) {
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return $errors;
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}
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$errors[] = "deterministic";
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if ($errors) {
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return false;
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}
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return $errors;
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}
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/** @return array|false */
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function array_append(array $errors) {
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if ($errors) {
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return $errors;
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}
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if (rand() % 2 > 0) {
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$errors[] = "unlucky";
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}
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if ($errors) {
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return false;
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}
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return $errors;
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}',
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],
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'noParadoxInCatch' => [
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'<?php
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function maybe_returns_array(): ?array {
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if (rand() % 2 > 0) {
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return ["key" => "value"];
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}
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if (rand() % 3 > 0) {
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throw new Exception("An exception occurred");
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}
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return null;
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}
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function try_catch_check(): array {
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$arr = null;
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try {
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$arr = maybe_returns_array();
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if (!$arr) { return []; }
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} catch (Exception $e) {
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if (!$arr) { return []; }
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}
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return $arr;
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}',
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],
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'lotsaTruthyStatements' => [
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'<?php
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class A {
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/**
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* @var ?string
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*/
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public $a = null;
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/**
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* @var ?string
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*/
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public $b = null;
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}
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function f(A $obj): string {
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if (($obj->a !== null) == true) {
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return $obj->a; // definitely not null
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} elseif (!is_null($obj->b) == true) {
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return $obj->b;
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} else {
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throw new \InvalidArgumentException("$obj->a or $obj->b must be set");
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}
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}',
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],
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'lotsaFalsyStatements' => [
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'<?php
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class A {
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/**
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* @var ?string
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*/
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public $a = null;
|
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/**
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* @var ?string
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*/
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public $b = null;
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}
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function f(A $obj): string {
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if (($obj->a === null) == false) {
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return $obj->a; // definitely not null
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} elseif (is_null($obj->b) == false) {
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return $obj->b;
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} else {
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throw new \InvalidArgumentException("$obj->a or $obj->b must be set");
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}
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}',
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],
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'ifGetClass' => [
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'<?php
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class A {}
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class B extends A {
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public function foo(): void {}
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}
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function takesA(A $a): void {
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if (get_class($a) === "B") {
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$a->foo();
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}
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}',
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],
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'ifNotEqualsGetClass' => [
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'<?php
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class A {}
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class B extends A {
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public function foo(): void {}
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}
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function takesA(A $a): void {
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if (get_class($a) !== "B") {
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// do nothing
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} else {
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$a->foo();
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}
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}',
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],
|
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'nestedCheckWithSingleVarPerLevel' => [
|
|
'<?php
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function foo(?stdClass $a, ?stdClass $b): void {
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if ($a) {
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if ($b) {}
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}
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}',
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],
|
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'nestedCheckWithTwoVarsPerLevel' => [
|
|
'<?php
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function foo(?stdClass $a, ?stdClass $b, ?stdClass $c, ?stdClass $d): void {
|
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if ($a && $b) {
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if ($c && $d) {}
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}
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}',
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],
|
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'nestedCheckWithReturn' => [
|
|
'<?php
|
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function foo(?stdClass $a, ?stdClass $b): void {
|
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if ($a === null) {
|
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return;
|
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}
|
|
|
|
if ($b) {
|
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echo "hello";
|
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}
|
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}',
|
|
],
|
|
'propertyFetchAfterNotNullCheck' => [
|
|
'<?php
|
|
class A {
|
|
/** @var ?string */
|
|
public $foo;
|
|
}
|
|
|
|
$a = new A;
|
|
|
|
if ($a->foo === null) {
|
|
$a->foo = "hello";
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|
exit;
|
|
}
|
|
|
|
if ($a->foo === "somestring") {}',
|
|
],
|
|
'propertyFetchAfterNotNullCheckInElseif' => [
|
|
'<?php
|
|
class A {
|
|
/** @var ?string */
|
|
public $foo;
|
|
}
|
|
|
|
if (rand(0, 10) > 5) {
|
|
} elseif (($a = new A) && $a->foo) {}',
|
|
],
|
|
'noParadoxForGetopt' => [
|
|
'<?php
|
|
$options = getopt("t:");
|
|
|
|
try {
|
|
if (!isset($options["t"])) {
|
|
throw new Exception("bad");
|
|
}
|
|
} catch (Exception $e) {}',
|
|
],
|
|
'instanceofInOr' => [
|
|
'<?php
|
|
class A {}
|
|
class B extends A {}
|
|
class C extends A {}
|
|
|
|
function takesA(A $a): void {}
|
|
|
|
function foo(?A $a): void {
|
|
if ($a instanceof B
|
|
|| ($a instanceof C && rand(0, 1))
|
|
) {
|
|
takesA($a);
|
|
}
|
|
}',
|
|
],
|
|
'instanceofInOrNegated' => [
|
|
'<?php
|
|
class A {}
|
|
class B extends A {}
|
|
class C extends A {}
|
|
|
|
function takesA(A $a): void {}
|
|
|
|
function foo(?A $a, ?A $b, ?A $c): void {
|
|
if (!$a || ($b && $c)) {
|
|
return;
|
|
}
|
|
|
|
takesA($a);
|
|
}',
|
|
],
|
|
'instanceofInBothOrs' => [
|
|
'<?php
|
|
class A {}
|
|
class B extends A {}
|
|
class C extends A {}
|
|
|
|
function takesA(A $a): void {}
|
|
|
|
function foo(?A $a): void {
|
|
if (($a instanceof B && rand(0, 1))
|
|
|| ($a instanceof C && rand(0, 1))
|
|
) {
|
|
takesA($a);
|
|
}
|
|
}',
|
|
],
|
|
'instanceofInBothOrsWithSecondVar' => [
|
|
'<?php
|
|
class A {}
|
|
class B extends A {}
|
|
class C extends A {}
|
|
|
|
function takesA(A $a): void {}
|
|
|
|
function foo(?A $a, ?A $b): void {
|
|
if (($a instanceof B && $b instanceof B)
|
|
|| ($a instanceof C && $b instanceof C)
|
|
) {
|
|
takesA($a);
|
|
takesA($b);
|
|
}
|
|
}',
|
|
],
|
|
'explosionOfCNF' => [
|
|
'<?php
|
|
class A {
|
|
/** @var ?string */
|
|
public $foo;
|
|
|
|
/** @var ?string */
|
|
public $bar;
|
|
}
|
|
|
|
$a1 = rand(0, 1) ? new A() : null;
|
|
$a4 = rand(0, 1) ? new A() : null;
|
|
$a5 = rand(0, 1) ? new A() : null;
|
|
$a7 = rand(0, 1) ? new A() : null;
|
|
$a8 = rand(0, 1) ? new A() : null;
|
|
|
|
if ($a1 || (($a4 && $a5) || ($a7 && $a8))) {}',
|
|
],
|
|
'instanceofInCNFOr' => [
|
|
'<?php
|
|
class A {}
|
|
class B extends A {}
|
|
class C extends A {}
|
|
|
|
function takesA(A $a): void {}
|
|
|
|
function foo(?A $a): void {
|
|
$c = rand(0, 1);
|
|
if (($a instanceof B || $a instanceof C)
|
|
&& ($a instanceof B || $c)
|
|
) {
|
|
takesA($a);
|
|
}
|
|
}',
|
|
],
|
|
'reconcileNestedOrsInElse' => [
|
|
'<?php
|
|
class A {}
|
|
class B {}
|
|
|
|
function takesA(A $a): void {}
|
|
|
|
function foo(?A $a, ?B $b): void {
|
|
if ($a === null || $b === null || rand(0, 1)) {
|
|
// do nothing
|
|
} else {
|
|
takesA($a);
|
|
}
|
|
}',
|
|
],
|
|
'getClassComparison' => [
|
|
'<?php
|
|
class Foo {
|
|
public function bar() : void {}
|
|
}
|
|
class Bar extends Foo{
|
|
public function bar() : void {}
|
|
}
|
|
|
|
class Baz {
|
|
public function test(Foo $foo) : void {
|
|
if (get_class($foo) !== Foo::class) {
|
|
// do nothing
|
|
} else {
|
|
$foo->bar();
|
|
}
|
|
}
|
|
}',
|
|
],
|
|
'noParadoxAfterConditionalAssignment' => [
|
|
'<?php
|
|
if ($a = rand(0, 5)) {
|
|
echo $a;
|
|
} elseif ($a = rand(0, 5)) {
|
|
echo $a;
|
|
}',
|
|
],
|
|
'callWithNonNullInTernary' => [
|
|
'<?php
|
|
function sayHello(?int $a, ?int $b): void {
|
|
if ($a === null && $b === null) {
|
|
throw new \LogicException();
|
|
}
|
|
|
|
takesInt($a !== null ? $a : $b);
|
|
}
|
|
|
|
function takesInt(int $c) : void {}',
|
|
],
|
|
'callWithNonNullInIf' => [
|
|
'<?php
|
|
function sayHello(?int $a, ?int $b): void {
|
|
if ($a === null && $b === null) {
|
|
throw new \LogicException();
|
|
}
|
|
|
|
if ($a !== null) {
|
|
takesInt($a);
|
|
} else {
|
|
takesInt($b);
|
|
}
|
|
}
|
|
|
|
function takesInt(int $c) : void {}',
|
|
],
|
|
'callWithNonNullInIfWithCallInElseif' => [
|
|
'<?php
|
|
function sayHello(?int $a, ?int $b): void {
|
|
if ($a === null && $b === null) {
|
|
throw new \LogicException();
|
|
}
|
|
|
|
if ($a !== null) {
|
|
takesInt($a);
|
|
} elseif (rand(0, 1)) {
|
|
takesInt($b);
|
|
}
|
|
}
|
|
|
|
function takesInt(int $c) : void {}',
|
|
],
|
|
'typeSimplification' => [
|
|
'<?php
|
|
class A {}
|
|
class B extends A {}
|
|
|
|
function foo(A $a, A $b) : ?B {
|
|
if (($a instanceof B || !$b instanceof B) && $a instanceof B && $b instanceof B) {
|
|
return $a;
|
|
}
|
|
|
|
return null;
|
|
}',
|
|
],
|
|
'instanceofNoRedundant' => [
|
|
'<?php
|
|
function logic(Bar $a, ?Bar $b) : void {
|
|
if ((!$a instanceof Foo || !$b instanceof Foo)
|
|
&& (!$a instanceof Foo || !$b instanceof Bar)
|
|
&& (!$a instanceof Bar || !$b instanceof Foo)
|
|
&& (!$a instanceof Bar || !$b instanceof Bar)
|
|
) {
|
|
|
|
} else {
|
|
if ($b instanceof Foo) {}
|
|
}
|
|
}
|
|
|
|
class Foo {}
|
|
class Bar extends Foo {}
|
|
class Bat extends Foo {}',
|
|
],
|
|
];
|
|
}
|
|
|
|
/**
|
|
* @return array
|
|
*/
|
|
public function providerFileCheckerInvalidCodeParse()
|
|
{
|
|
return [
|
|
'threeVarLogicWithChange' => [
|
|
'<?php
|
|
function takesString(string $s): void {}
|
|
|
|
function foo(?string $a, ?string $b, ?string $c): void {
|
|
if ($a !== null || $b !== null || $c !== null) {
|
|
$c = null;
|
|
|
|
if ($a !== null) {
|
|
$d = $a;
|
|
} elseif ($b !== null) {
|
|
$d = $b;
|
|
} else {
|
|
$d = $c;
|
|
}
|
|
|
|
takesString($d);
|
|
}
|
|
}',
|
|
'error_message' => 'PossiblyNullArgument',
|
|
],
|
|
'threeVarLogicWithException' => [
|
|
'<?php
|
|
function takesString(string $s): void {}
|
|
|
|
function foo(?string $a, ?string $b, ?string $c): void {
|
|
if ($a !== null || $b !== null || $c !== null) {
|
|
if ($c !== null) {
|
|
throw new \Exception("bad");
|
|
}
|
|
|
|
if ($a !== null) {
|
|
$d = $a;
|
|
} elseif ($b !== null) {
|
|
$d = $b;
|
|
} else {
|
|
$d = $c;
|
|
}
|
|
|
|
takesString($d);
|
|
}
|
|
}',
|
|
'error_message' => 'PossiblyNullArgument',
|
|
],
|
|
'invertedTwoVarLogicNotNestedWithVarChange' => [
|
|
'<?php
|
|
function foo(?string $a, ?string $b): string {
|
|
if ($a !== null || $b !== null) {
|
|
$b = null;
|
|
} else {
|
|
return "bad";
|
|
}
|
|
|
|
if ($a !== null) return $b;
|
|
return $a;
|
|
}',
|
|
'error_message' => 'NullableReturnStatement',
|
|
],
|
|
'invertedTwoVarLogicNotNestedWithElseif' => [
|
|
'<?php
|
|
function foo(?string $a, ?string $b): string {
|
|
if (rand(0, 1)) {
|
|
// do nothing
|
|
} elseif ($a || $b) {
|
|
// do nothing here
|
|
} else {
|
|
return "bad";
|
|
}
|
|
|
|
if (!$a) return $b;
|
|
return $a;
|
|
}',
|
|
'error_message' => 'NullableReturnStatement',
|
|
],
|
|
'threeVarLogicWithElseifAndAnd' => [
|
|
'<?php
|
|
function foo(?string $a, ?string $b, ?string $c): string {
|
|
if ($a) {
|
|
// do nothing
|
|
} elseif ($b && $c) {
|
|
// do nothing here
|
|
} else {
|
|
return "bad";
|
|
}
|
|
|
|
if (!$a && !$b) return $c;
|
|
if (!$a) return $b;
|
|
return $a;
|
|
}',
|
|
'error_message' => 'ParadoxicalCondition',
|
|
],
|
|
'twoVarLogicNotNestedWithElseifIncorrectlyReinforcedInIf' => [
|
|
'<?php
|
|
function foo(?string $a, ?string $b): string {
|
|
if ($a) {
|
|
$a = "";
|
|
} elseif ($b) {
|
|
// do nothing
|
|
} else {
|
|
return "bad";
|
|
}
|
|
|
|
if (!$a) return $b;
|
|
return $a;
|
|
}',
|
|
'error_message' => 'RedundantCondition',
|
|
],
|
|
'repeatedIfStatements' => [
|
|
'<?php
|
|
/** @return string|null */
|
|
function foo(?string $a) {
|
|
if ($a) {
|
|
return $a;
|
|
}
|
|
|
|
if ($a) {
|
|
|
|
}
|
|
}',
|
|
'error_message' => 'ParadoxicalCondition',
|
|
],
|
|
'repeatedConditionals' => [
|
|
'<?php
|
|
function foo(?string $a): void {
|
|
if ($a) {
|
|
// do something
|
|
} elseif ($a) {
|
|
// can never get here
|
|
}
|
|
}',
|
|
'error_message' => 'ParadoxicalCondition',
|
|
],
|
|
'repeatedAndConditional' => [
|
|
'<?php
|
|
function foo(string $a, string $b): void {
|
|
if ($a && $b) {
|
|
echo "a";
|
|
} elseif ($a && $b) {
|
|
echo "b";
|
|
}
|
|
}',
|
|
'error_message' => 'ParadoxicalCondition',
|
|
],
|
|
'andConditionalAfterOrConditional' => [
|
|
'<?php
|
|
function foo(string $a, string $b): void {
|
|
if ($a || $b) {
|
|
echo "a";
|
|
} elseif ($a && $b) {
|
|
echo "b";
|
|
}
|
|
}',
|
|
'error_message' => 'ParadoxicalCondition',
|
|
],
|
|
'repeatedVarFromOrConditional' => [
|
|
'<?php
|
|
function foo(string $a, string $b): void {
|
|
if ($a || $b) {
|
|
echo "a";
|
|
} elseif ($a) {
|
|
echo "b";
|
|
}
|
|
}',
|
|
'error_message' => 'ParadoxicalCondition',
|
|
],
|
|
'typeDoesntEqualType' => [
|
|
'<?php
|
|
$a = "hello";
|
|
$b = 5;
|
|
if ($a !== $b) {}',
|
|
'error_message' => 'RedundantCondition',
|
|
],
|
|
];
|
|
}
|
|
}
|