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psalm/tests/RedundantConditionTest.php
Matthew Brown da42be175f Apply PHPCS fixes
Fixes #1880
2019-07-05 16:27:53 -04:00

1027 lines
35 KiB
PHP

<?php
namespace Psalm\Tests;
use const DIRECTORY_SEPARATOR;
class RedundantConditionTest extends TestCase
{
use Traits\ValidCodeAnalysisTestTrait;
use Traits\InvalidCodeAnalysisTestTrait;
/**
* @return iterable<string,array{string,assertions?:array<string,string>,error_levels?:string[]}>
*/
public function providerValidCodeParse()
{
return [
'ignoreIssueAndAssign' => [
'<?php
function foo(): stdClass {
return new stdClass;
}
$b = null;
foreach ([0, 1] as $i) {
$a = foo();
if (!empty($a)) {
$b = $a;
}
}',
'assertions' => [
'$b' => 'null|stdClass',
],
'error_levels' => ['RedundantCondition'],
],
'byrefNoRedundantCondition' => [
'<?php
/**
* @param int $min ref
* @param int $other
*/
function testmin(&$min, int $other): void {
if (is_null($min)) {
$min = 3;
} elseif (!is_int($min)) {
$min = 5;
} elseif ($min < $other) {
$min = $other;
}
}',
'assertions' => [],
'error_levels' => [
'RedundantConditionGivenDocblockType',
'DocblockTypeContradiction',
],
],
'assignmentInIf' => [
'<?php
function test(int $x = null): int {
if (!$x && !($x = rand(0, 10))) {
echo "Failed to get non-empty x\n";
return -1;
}
return $x;
}',
],
'noRedundantConditionAfterAssignment' => [
'<?php
/** @param int $i */
function foo($i): void {
if ($i !== null) {
$i = (int) $i;
if ($i) {}
}
}',
'assertions' => [],
'error_levels' => [
'RedundantConditionGivenDocblockType',
],
],
'noRedundantConditionAfterDocblockTypeNullCheck' => [
'<?php
class A {
/** @var ?int */
public $foo;
}
class B {}
/**
* @param A|B $i
*/
function foo($i): void {
if (empty($i)) {
return;
}
switch (get_class($i)) {
case A::class:
if ($i->foo) {}
break;
default:
break;
}
}',
'assertions' => [],
'error_levels' => ['DocblockTypeContradiction'],
],
'noRedundantConditionTypeReplacementWithDocblock' => [
'<?php
class A {}
/**
* @return A
*/
function getA() {
return new A();
}
$maybe_a = rand(0, 1) ? new A : null;
if ($maybe_a === null) {
$maybe_a = getA();
}
if ($maybe_a === null) {}',
'assertions' => [],
'error_levels' => [
'DocblockTypeContradiction',
],
],
'noRedundantConditionAfterPossiblyNullCheck' => [
'<?php
if (rand(0, 1)) {
$a = "hello";
}
if ($a) {}',
'assertions' => [],
'error_levels' => ['PossiblyUndefinedGlobalVariable'],
],
'noRedundantConditionAfterFromDocblockRemoval' => [
'<?php
class A {
public function foo(): bool {
return (bool) rand(0, 1);
}
public function bar(): bool {
return (bool) rand(0, 1);
}
}
/** @return A */
function makeA() {
return new A;
}
$a = makeA();
if ($a === null) {
exit;
}
if ($a->foo() || $a->bar()) {}',
'assertions' => [],
'error_levels' => [
'DocblockTypeContradiction',
],
],
'noEmptyUndefinedArrayVar' => [
'<?php
if (rand(0,1)) {
/** @psalm-suppress UndefinedGlobalVariable */
$a = $b[0];
} else {
$a = null;
}
if ($a) {}',
'assertions' => [],
'error_levels' => ['MixedAssignment', 'MixedArrayAccess'],
],
'noComplaintWithIsNumericThenIsEmpty' => [
'<?php
function takesString(string $s): void {
if (!is_numeric($s) || empty($s)) {}
}',
],
'noRedundantConditionOnTryCatchVars' => [
'<?php
function trycatch(): void {
$value = null;
try {
if (rand() % 2 > 0) {
throw new RuntimeException("Failed");
}
$value = new stdClass();
if (rand() % 2 > 0) {
throw new RuntimeException("Failed");
}
} catch (Exception $e) {
if ($value) {
var_export($value);
}
}
if ($value) {}
}',
],
'noRedundantConditionInFalseCheck' => [
'<?php
$ch = curl_init();
if (!$ch) {}',
],
'noRedundantConditionInForCheck' => [
'<?php
class Node
{
/** @var Node|null */
public $next;
public function iterate(): void
{
for ($node = $this; $node !== null; $node = $node->next) {}
}
}',
],
'noRedundantConditionComparingBool' => [
'<?php
function getBool(): bool {
return (bool)rand(0, 1);
}
function takesBool(bool $b): void {
if ($b === getBool()) {}
}',
],
'evaluateElseifProperly' => [
'<?php
/** @param string $str */
function foo($str): int {
if (is_null($str)) {
return 1;
} else if (strlen($str) < 1) {
return 2;
}
return 2;
}',
'assertions' => [],
'error_levels' => [
'DocblockTypeContradiction',
'RedundantConditionGivenDocblockType',
],
],
'evaluateArrayCheck' => [
'<?php
function array_check(): void {
$data = ["f" => false];
while (rand(0, 1) > 0 && !$data["f"]) {
$data = ["f" => true];
}
}',
],
'mixedArrayAssignment' => [
'<?php
/** @param mixed $arr */
function foo($arr): void {
if ($arr["a"] === false) {
$arr["a"] = (bool) rand(0, 1);
if ($arr["a"] === false) {}
}
}',
'assertions' => [],
'error_levels' => ['MixedAssignment', 'MixedArrayAccess'],
],
'hardPhpTypeAssertionsOnDocblockBoolType' => [
'<?php
/** @param bool|null $bar */
function foo($bar): void {
if (!is_null($bar) && !is_bool($bar)) {
throw new \Exception("bad");
}
if ($bar !== null) {}
}',
'assertions' => [],
'error_levels' => ['DocblockTypeContradiction'],
],
'hardPhpTypeAssertionsOnDocblockStringType' => [
'<?php
/** @param string|null $bar */
function foo($bar): void {
if (!is_null($bar) && !is_string($bar)) {
throw new \Exception("bad");
}
if ($bar !== null) {}
}',
'assertions' => [],
'error_levels' => ['DocblockTypeContradiction'],
],
'isObjectAssertionOnDocblockType' => [
'<?php
class A {}
class B {}
/** @param A|B $a */
function foo($a) : void {
if (!is_object($a)) {
return;
}
if ($a instanceof A) {
} elseif ($a instanceof B) {
} else {
throw new \Exception("bad");
}
}',
'assertions' => [],
'error_levels' => ['RedundantConditionGivenDocblockType', 'DocblockTypeContradiction'],
],
'nullToMixedWithNullCheckWithArraykey' => [
'<?php
/** @return array<array-key, mixed> */
function getStrings(): array {
return ["hello", "world", 50];
}
$a = getStrings();
if (is_string($a[0]) && strlen($a[0]) > 3) {}',
'assignments' => [],
'error_levels' => [],
],
'nullToMixedWithNullCheckWithIntKey' => [
'<?php
/** @return array<int, mixed> */
function getStrings(): array {
return ["hello", "world", 50];
}
$a = getStrings();
if (is_string($a[0]) && strlen($a[0]) > 3) {}',
'assignments' => [],
'error_levels' => [],
],
'replaceFalseTypeWithTrueConditionalOnMixedEquality' => [
'<?php
function getData() {
return rand(0, 1) ? [1, 2, 3] : false;
}
$a = false;
while ($i = getData()) {
if (!$a && $i[0] === 2) {
$a = true;
}
if ($a === false) {}
}',
'assignments' => [],
'error_levels' => ['MixedAssignment', 'MissingReturnType', 'MixedArrayAccess'],
],
'nullCoalescePossiblyUndefined' => [
'<?php
if (rand(0,1)) {
$options = ["option" => true];
}
$option = $options["option"] ?? false;
if ($option) {}',
'assignments' => [],
'error_levels' => ['MixedAssignment', 'MixedArrayAccess'],
],
'allowIntValueCheckAfterComparisonDueToOverflow' => [
'<?php
function foo(int $x) : void {
$x = $x + 1;
if (!is_int($x)) {
echo "Is a float.";
} else {
echo "Is an int.";
}
}
function bar(int $x) : void {
$x = $x + 1;
if (is_float($x)) {
echo "Is a float.";
} else {
echo "Is an int.";
}
}',
],
'allowIntValueCheckAfterComparisonDueToOverflowInc' => [
'<?php
function foo(int $x) : void {
$x++;
if (!is_int($x)) {
echo "Is a float.";
} else {
echo "Is an int.";
}
}
function bar(int $x) : void {
$x++;
if (is_float($x)) {
echo "Is a float.";
} else {
echo "Is an int.";
}
}',
],
'allowIntValueCheckAfterComparisonDueToConditionalOverflow' => [
'<?php
function foo(int $x) : void {
if (rand(0, 1)) {
$x = $x + 1;
}
if (is_float($x)) {
echo "Is a float.";
} else {
echo "Is an int.";
}
}',
],
'changeStringValue' => [
'<?php
$concat = "";
foreach (["x", "y"] as $v) {
if ($concat != "") {
$concat .= ", ";
}
$concat .= "($v)";
}',
],
'arrayCanBeEmpty' => [
'<?php
$x = ["key" => "value"];
if (rand(0, 1)) {
$x = [];
}
if ($x) {
var_export($x);
}',
],
'arrayKeyExistsAccess' => [
'<?php
/** @param array<int, string> $arr */
function foo(array $arr) : void {
if (array_key_exists(1, $arr)) {
$a = ($arr[1] === "b") ? true : false;
}
}',
],
'noRedundantConditionStringNotFalse' => [
'<?php
function foo(string $s) : void {
if ($s != false ) {}
}',
],
'noRedundantConditionStringNotTrue' => [
'<?php
function foo(string $s) : void {
if ($s != true ) {}
}',
],
'noRedundantConditionBoolNotFalse' => [
'<?php
function foo(bool $s) : void {
if ($s !== false ) {}
}',
],
'noRedundantConditionBoolNotTrue' => [
'<?php
function foo(bool $s) : void {
if ($s !== true ) {}
}',
],
'noRedundantConditionNullableBoolIsFalseOrTrue' => [
'<?php
function foo(?bool $s) : void {
if ($s === false ) {} elseif ($s === true) {}
}',
],
'noRedundantConditionNullableBoolIsTrueOrFalse' => [
'<?php
function foo(?bool $s) : void {
if ($s === true ) {} elseif ($s === false) {}
}',
],
'noRedundantConditionAfterCheckingMixedTwice' => [
'<?php
function foo($a) : void {
$b = $a ? 1 : 0;
$c = $a ? 1 : 0;
}',
[],
'error_levels' => ['MissingParamType'],
],
'notAlwaysTrueBinaryOp' => [
'<?php
function foo ($a) : void {
if (!$a) {}
$b = $a && rand(0, 1);
}',
[],
'error_levels' => ['MissingParamType'],
],
'noRedundantConditionAfterAssertingValue' => [
'<?php
function foo(string $t, bool $b) : void {
if (!$b && $t === "a") {
return;
}
if ($t === "c") {
if (!$b && bar($t)) {}
}
}
function bar(string $b) : bool {
return true;
}',
],
'noRedundantConditionBleed' => [
'<?php
$foo = getopt("i");
$i = $foo["i"];
/** @psalm-suppress TypeDoesNotContainNull */
if ($i === null) {
exit;
}
if ($i) {}',
],
'emptyWithoutKnowingArrayType' => [
'<?php
function foo(array $a) : void {
if (!empty($a["foo"])) {
foreach ($a["foo"] as $key => $_) {
if (rand(0, 1)) {
unset($a["foo"][$key]);
}
}
if (empty($a["foo"])) {}
}
}',
[],
['MixedAssignment', 'MixedArrayAccess', 'MixedArrayOffset'],
],
'emptyKnowingArrayType' => [
'<?php
/**
* @param array<string, array<string, int>> $a
*/
function foo(array $a) : void {
if (!empty($a["foo"])) {
foreach ($a["foo"] as $key => $_) {
if (rand(0, 1)) {
unset($a["foo"][$key]);
}
}
if (empty($a["foo"])) {}
}
}',
],
'suppressRedundantConditionAfterAssertNonEmpty' => [
'<?php
/**
* @param array<int> $a
*/
function process(array $a): void {
assert(!empty($a));
/** @psalm-suppress RedundantConditionGivenDocblockType */
assert(is_int($a[0]));
}',
],
'allowChecksOnFalsyIf' => [
'<?php
function foo(?string $s) : string {
if ($s == null) {
if ($s === null) {}
return "hello";
} else {
return $s;
}
}',
],
'updateArrayAfterUnset' => [
'<?php
/**
* @param string[] $arr
*/
function foo(string $s) : void {
$dict = ["a" => 1];
unset($dict[$s]);
if (count($dict)) {}
}',
],
'updateArrayAfterUnsetInLoop' => [
'<?php
/**
* @param string[] $arr
*/
function foo(array $arr) : void {
$dict = ["a" => 1, "b" => 2, "c" => 3];
foreach ($arr as $v) {
unset($dict[$v]);
}
if (count($dict)) {}
}',
],
];
}
/**
* @return iterable<string,array{string,error_message:string,2?:string[],3?:bool,4?:string}>
*/
public function providerInvalidCodeParse()
{
return [
'ifFalse' => [
'<?php
$y = false;
if ($y) {}',
'error_message' => 'TypeDoesNotContainType',
],
'ifNotTrue' => [
'<?php
$y = true;
if (!$y) {}',
'error_message' => 'TypeDoesNotContainType',
],
'ifTrue' => [
'<?php
$y = true;
if ($y) {}',
'error_message' => 'RedundantCondition',
],
'unnecessaryInstanceof' => [
'<?php
class One {
public function fooFoo() : void {}
}
$var = new One();
if ($var instanceof One) {
$var->fooFoo();
}',
'error_message' => 'RedundantCondition',
],
'failedTypeResolution' => [
'<?php
class A { }
/**
* @return void
*/
function fooFoo(A $a) {
if ($a instanceof A) {
}
}',
'error_message' => 'RedundantCondition',
],
'failedTypeResolutionWithDocblock' => [
'<?php
class A { }
/**
* @param A $a
* @return void
*/
function fooFoo(A $a) {
if ($a instanceof A) {
}
}',
'error_message' => 'RedundantCondition',
],
'typeResolutionFromDocblockAndInstanceof' => [
'<?php
class A { }
/**
* @param A $a
* @return void
* @psalm-suppress RedundantConditionGivenDocblockType
*/
function fooFoo($a) {
if ($a instanceof A) {
if ($a instanceof A) {
}
}
}',
'error_message' => 'RedundantCondition',
],
'typeResolutionRepeatingConditionWithSingleVar' => [
'<?php
$a = rand(0, 10) > 5;
if ($a && $a) {}',
'error_message' => 'RedundantCondition',
],
'typeResolutionRepeatingConditionWithVarInMiddle' => [
'<?php
$a = rand(0, 10) > 5;
$b = rand(0, 10) > 5;
if ($a && $b && $a) {}',
'error_message' => 'RedundantCondition',
],
'typeResolutionRepeatingOredConditionWithSingleVar' => [
'<?php
$a = rand(0, 10) > 5;
if ($a || $a) {}',
'error_message' => 'ParadoxicalCondition',
],
'typeResolutionRepeatingOredConditionWithVarInMiddle' => [
'<?php
$a = rand(0, 10) > 5;
$b = rand(0, 10) > 5;
if ($a || $b || $a) {}',
'error_message' => 'ParadoxicalCondition',
],
'typeResolutionIsIntAndIsNumeric' => [
'<?php
$c = rand(0, 10) > 5 ? "hello" : 3;
if (is_int($c) && is_numeric($c)) {}',
'error_message' => 'RedundantCondition',
],
'typeResolutionWithInstanceOfAndNotEmpty' => [
'<?php
$x = rand(0, 10) > 5 ? new stdClass : null;
if ($x instanceof stdClass && $x) {}',
'error_message' => 'RedundantCondition',
],
'methodWithMeaninglessCheck' => [
'<?php
class One {
/** @return void */
public function fooFoo() {}
}
class B {
/** @return void */
public function barBar(One $one) {
if (!$one) {
// do nothing
}
$one->fooFoo();
}
}',
'error_message' => 'TypeDoesNotContainType',
],
'twoVarLogicNotNestedWithElseifNegatedInIf' => [
'<?php
function foo(?string $a, ?string $b): ?string {
if ($a) {
$a = null;
} elseif ($b) {
// do nothing here
} else {
return "bad";
}
if (!$a) return $b;
return $a;
}',
'error_message' => 'RedundantCondition',
],
'refineTypeInMethodCall' => [
'<?php
class A {}
/** @return ?A */
function getA() {
return rand(0, 1) ? new A : null;
}
function takesA(A $a): void {}
$a = getA();
if ($a instanceof A) {}
/** @psalm-suppress PossiblyNullArgument */
takesA($a);
if ($a instanceof A) {}',
'error_message' => 'RedundantCondition - src' . DIRECTORY_SEPARATOR . 'somefile.php:15',
],
'replaceFalseType' => [
'<?php
function foo(bool $b) : void {
if (!$b) {
$b = true;
}
if ($b) {}
}',
'error_message' => 'RedundantCondition',
],
'replaceTrueType' => [
'<?php
function foo(bool $b) : void {
if ($b) {
$b = false;
}
if ($b) {}
}',
'error_message' => 'TypeDoesNotContainType - src' . DIRECTORY_SEPARATOR . 'somefile.php:7',
],
'disallowFloatCheckAfterSettingToVar' => [
'<?php
function foo(int $x) : void {
if (rand(0, 1)) {
$x = 125;
}
if (is_float($x)) {
echo "Is a float.";
} else {
echo "Is an int.";
}
}',
'error_message' => 'TypeDoesNotContainType - src' . DIRECTORY_SEPARATOR . 'somefile.php:7',
],
'disallowTwoIntValueChecksDueToConditionalOverflow' => [
'<?php
function foo(int $x) : void {
$x = $x + 1;
if (is_int($x)) {
} elseif (is_int($x)) {}
}',
'error_message' => 'TypeDoesNotContainType - src' . DIRECTORY_SEPARATOR . 'somefile.php:6',
],
'redundantEmptyArray' => [
'<?php
$x = ["key" => "value"];
if ($x) {
var_export($x);
}',
'error_message' => 'RedundantCondition',
],
'redundantConditionStringNotFalse' => [
'<?php
function foo(string $s) : void {
if ($s !== false ) {}
}',
'error_message' => 'RedundantCondition',
],
'redundantConditionStringNotTrue' => [
'<?php
function foo(string $s) : void {
if ($s !== true ) {}
}',
'error_message' => 'RedundantCondition',
],
'redundantConditionAfterRemovingFalse' => [
'<?php
$s = rand(0, 1) ? rand(0, 5) : false;
if ($s !== false) {
if (is_int($s)) {}
}',
'error_message' => 'RedundantCondition',
],
'redundantConditionAfterRemovingTrue' => [
'<?php
$s = rand(0, 1) ? rand(0, 5) : true;
if ($s !== true) {
if (is_int($s)) {}
}',
'error_message' => 'RedundantCondition',
],
'impossibleNullEquality' => [
'<?php
$i = 5;
echo $i !== null;',
'error_message' => 'RedundantCondition',
],
'impossibleTrueEquality' => [
'<?php
$i = 5;
echo $i !== true;',
'error_message' => 'RedundantCondition',
],
'impossibleFalseEquality' => [
'<?php
$i = 5;
echo $i !== false;',
'error_message' => 'RedundantCondition',
],
'impossibleNumberEquality' => [
'<?php
$i = 5;
echo $i !== 3;',
'error_message' => 'RedundantCondition',
],
'alwaysTrueBinaryOp' => [
'<?php
function foo ($a) : void {
if (!$a) return;
$b = $a && rand(0, 1);
}',
'error_message' => 'RedundantCondition',
'error_levels' => ['MissingParamType'],
],
'negatedInstanceof' => [
'<?php
class A {}
class B {}
function foo(A $a) : void {
if (!$a instanceof B) {}
}',
'error_message' => 'RedundantCondition',
],
'redundantInstanceof' => [
'<?php
/** @param Exception $a */
function foo($a) : void {
if ($a instanceof \Exception) {}
}',
'error_message' => 'RedundantConditionGivenDocblockType',
],
'preventDocblockTypesBeingIdenticalToTrue' => [
'<?php
class A {}
/**
* @param A $a
*/
function foo($a, $b) : void {
if ($a === true) {}
}',
'error_message' => 'DocblockTypeContradiction',
],
'preventDocblockTypesBeingIdenticalToTrueReversed' => [
'<?php
class A {}
/**
* @param A $a
*/
function foo($a, $b) : void {
if (true === $a) {}
}',
'error_message' => 'DocblockTypeContradiction',
],
'preventDocblockTypesBeingIdenticalToFalse' => [
'<?php
class A {}
/**
* @param A $a
*/
function foo($a, $b) : void {
if ($a === false) {}
}',
'error_message' => 'DocblockTypeContradiction',
],
'preventDocblockTypesBeingIdenticalToFalseReversed' => [
'<?php
class A {}
/**
* @param A $a
*/
function foo($a, $b) : void {
if (false === $a) {}
}',
'error_message' => 'DocblockTypeContradiction',
],
'preventDocblockTypesBeingSameAsEmptyArrayReversed' => [
'<?php
class A {}
/**
* @param A $a
*/
function foo($a, $b) : void {
if ([] == $a) {}
}',
'error_message' => 'DocblockTypeContradiction',
],
'preventDocblockTypesBeingIdenticalToEmptyArrayReversed' => [
'<?php
class A {}
/**
* @param A $a
*/
function foo($a, $b) : void {
if ([] === $a) {}
}',
'error_message' => 'DocblockTypeContradiction',
],
'preventTypesBeingIdenticalToEmptyArrayReversed' => [
'<?php
class A {}
function foo(A $a, $b) : void {
if ([] === $a) {}
}',
'error_message' => 'TypeDoesNotContainType',
],
];
}
}