mirror of
https://github.com/danog/psalm.git
synced 2024-11-27 04:45:20 +01:00
654 lines
22 KiB
PHP
654 lines
22 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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'twoVarLogicNotNestedWithElseif' => [
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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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'threeVarLogicNotNested' => [
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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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'threeVarLogicNotNestedAndOr' => [
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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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];
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}
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/**
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* @return array
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*/
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public function providerFileCheckerInvalidCodeParse()
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{
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return [
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'threeVarLogicWithChange' => [
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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 || $c !== null) {
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$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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'error_message' => 'PossiblyNullArgument',
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],
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'threeVarLogicWithException' => [
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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 || $c !== null) {
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if ($c !== null) {
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throw new \Exception("bad");
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}
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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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'error_message' => 'PossiblyNullArgument',
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],
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'invertedTwoVarLogicNotNestedWithVarChange' => [
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'<?php
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function foo(?string $a, ?string $b) : string {
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if ($a || $b) {
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$b = 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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'error_message' => 'InvalidReturnType',
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],
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'invertedTwoVarLogicNotNestedWithElseif' => [
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'<?php
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function foo(?string $a, ?string $b) : string {
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if (rand(0, 1)) {
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// do nothing
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} elseif ($a || $b) {
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// do nothing here
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} else {
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return "bad";
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}
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if (!$a) return $b;
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return $a;
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}',
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'error_message' => 'InvalidReturnType',
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],
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'threeVarLogicWithElseifAndAnd' => [
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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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'error_message' => 'InvalidReturnType',
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],
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'twoVarLogicNotNestedWithElseifNegatedInIf' => [
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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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$a = null;
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} elseif ($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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|
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if (!$a) return $b;
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return $a;
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}',
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'error_message' => 'InvalidReturnType',
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],
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'twoVarLogicNotNestedWithElseifIncorrectlyReinforcedInIf' => [
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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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$a = "";
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} elseif ($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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'error_message' => 'InvalidReturnType',
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],
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'repeatedIfStatements' => [
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'<?php
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/** @return string|null */
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function foo(?string $a) {
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if ($a) {
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return $a;
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}
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|
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if ($a) {
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}
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}',
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'error_message' => 'ParadoxicalCondition',
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],
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'repeatedConditionals' => [
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'<?php
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function foo(?string $a) : void {
|
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if ($a) {
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// do something
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} elseif ($a) {
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// can never get here
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}
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}',
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'error_message' => 'ParadoxicalCondition',
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],
|
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'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',
|
|
],
|
|
];
|
|
}
|
|
}
|