add more tests (#22)

README.md

@@ -42,7 +42,7 @@ foo([95, 96, null, 98]);
 
 ## Installation
 
-This package doesn't not have a stable release yet, but you can still install it using composer :
+This package doesn't have a stable release yet, but you can still install it using composer :
 
 ```console
 $ composer require azjezz/psl:dev-develop

psalm.xml

@@ -2,6 +2,11 @@
 <psalm
         totallyTyped="true"
         resolveFromConfigFile="true"
+        forbidEcho="true"
+        strictBinaryOperands="true"
+        phpVersion="7.4"
+        allowPhpStormGenerics="true"
+        allowStringToStandInForClass="true"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xmlns="https://getpsalm.org/schema/config"
         xsi:schemaLocation="https://getpsalm.org/schema/config vendor/vimeo/psalm/config.xsd"

tests/Psl/Arr/CountValuesTest.php

@@ -56,4 +56,14 @@ class CountValuesTest extends TestCase
             ],
         ];
     }
+
+    public function testCountThrowsForNonArrayKeyValues(): void
+    {
+        $this->expectException(Exception\InvariantViolationException::class);
+        $this->expectExceptionMessage('Expected all values to be of type array-key, value of type (object) provided.');
+
+        Arr\count_values([
+            new Collection\Map([]),
+        ]);
+    }
 }

tests/Psl/InvariantTest.php

@@ -0,0 +1,27 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Psl\Tests;
+
+use PHPUnit\Framework\TestCase;
+use Psl;
+use Psl\Exception\InvariantViolationException;
+
+class InvariantTest extends TestCase
+{
+    public function testInvariant(): void
+    {
+        $this->expectException(InvariantViolationException::class);
+        $this->expectExceptionMessage('Something went wrong!');
+
+        Psl\invariant(false, 'Something %s %s!', 'went', 'wrong');
+    }
+
+    public function testInvariantDoesNotThrowWhenTheFactIsTrue(): void
+    {
+        Psl\invariant(2 === (1 + 1), 'Unless?');
+
+        $this->addToAssertionCount(1);
+    }
+}

tests/Psl/Iter/AllTest.php

@@ -5,8 +5,31 @@ declare(strict_types=1);
 namespace Psl\Tests\Iter;
 
 use PHPUnit\Framework\TestCase;
+use Psl\Iter;
 
 class AllTest extends TestCase
 {
-    // TODO: add tests.
+    /**
+     * @dataProvider provideData
+     */
+    public function testAll(bool $expected, iterable $iterable, callable $predicate): void
+    {
+        $this->assertSame($expected, Iter\all($iterable, $predicate));
+    }
+
+    public function provideData(): iterable
+    {
+        yield [false, [false, true, true], fn (bool $value): bool => $value];
+        yield [false, [false, true, true], fn (bool $value): bool => !$value];
+        yield [true, [true, true, true], fn (bool $value): bool => $value];
+        yield [false, [true, true, true], fn (bool $value): bool => !$value];
+        yield [false, [false, false, false], fn (bool $value): bool => $value];
+        yield [true, [false, false, false], fn (bool $value): bool => !$value];
+        yield [true, [false, false, false], fn (bool $value): bool => true];
+        yield [false, [false, false, false], fn (bool $value): bool => false];
+        yield [false, [1, 2, 3], fn (int $i): bool => $i > 3];
+        yield [true, [4, 5, 6], fn (int $i): bool => $i > 3];
+        yield [false, [1, 2, 3, 4, 5, 6], fn (int $i): bool => $i > 3];
+        yield [true, [], fn (bool $value): bool => false];
+    }
 }

tests/Psl/Iter/AnyTest.php

@@ -5,8 +5,31 @@ declare(strict_types=1);
 namespace Psl\Tests\Iter;
 
 use PHPUnit\Framework\TestCase;
+use Psl\Iter;
 
 class AnyTest extends TestCase
 {
-    // TODO: add tests.
+    /**
+     * @dataProvider provideData
+     */
+    public function testAny(bool $expected, iterable $iterable, callable $predicate): void
+    {
+        $this->assertSame($expected, Iter\any($iterable, $predicate));
+    }
+
+    public function provideData(): iterable
+    {
+        yield [true, [false, true, true], fn (bool $value): bool => $value];
+        yield [true, [false, true, true], fn (bool $value): bool => !$value];
+        yield [true, [true, true, true], fn (bool $value): bool => $value];
+        yield [false, [true, true, true], fn (bool $value): bool => !$value];
+        yield [false, [false, false, false], fn (bool $value): bool => $value];
+        yield [true, [false, false, false], fn (bool $value): bool => !$value];
+        yield [true, [false, false, false], fn (bool $value): bool => true];
+        yield [false, [false, false, false], fn (bool $value): bool => false];
+        yield [false, [1, 2, 3], fn (int $i): bool => $i > 3];
+        yield [true, [4, 5, 6], fn (int $i): bool => $i > 3];
+        yield [true, [1, 2, 3, 4, 5, 6], fn (int $i): bool => $i > 3];
+        yield [false, [], fn (bool $value): bool => false];
+    }
 }

tests/Psl/Iter/ApplyTest.php

@@ -5,8 +5,16 @@ declare(strict_types=1);
 namespace Psl\Tests\Iter;
 
 use PHPUnit\Framework\TestCase;
+use Psl\Collection\MutableVector;
+use Psl\Iter;
 
 class ApplyTest extends TestCase
 {
-    // TODO: add tests.
+    public function testApply(): void
+    {
+        $vec = new MutableVector([]);
+        Iter\apply([1, 2, 3], fn (int $i) => $vec->add($i));
+
+        $this->assertSame([1, 2, 3], $vec->toArray());
+    }
 }

tests/Psl/Iter/IteratorTest.php

@@ -5,41 +5,31 @@ declare(strict_types=1);
 namespace Psl\Tests\Iter;
 
 use PHPUnit\Framework\TestCase;
+use Psl\Exception\InvariantViolationException;
+use Psl\Iter;
 
 class IteratorTest extends TestCase
 {
-    public function testCurrent(): void
-    {
-        // TODO: write tests for Iterator::current
-    }
-
-    public function testNext(): void
-    {
-        // TODO: write tests for Iterator::next
-    }
-
-    public function testKey(): void
-    {
-        // TODO: write tests for Iterator::key
-    }
-
-    public function testValid(): void
-    {
-        // TODO: write tests for Iterator::valid
-    }
-
-    public function testRewind(): void
-    {
-        // TODO: write tests for Iterator::rewind
-    }
-
     public function testSeek(): void
     {
-        // TODO: write tests for Iterator::seek
+        $iterator = new Iter\Iterator([1, 2, 3, 4, 5]);
+
+        $this->assertSame(1, $iterator->current());
+        $iterator->next();
+        $this->assertSame(2, $iterator->current());
+        $iterator->next();
+
+        $iterator->seek(0);
+        $this->assertSame(1, $iterator->current());
     }
 
-    public function testCount(): void
+    public function testSeekThrowsForOutOfBoundIndex(): void
     {
-        // TODO: write tests for Iterator::count
+        $iterator = new Iter\Iterator([1, 2, 3, 4, 5]);
+
+        $this->expectException(InvariantViolationException::class);
+        $this->expectExceptionMessage('Position (30) is out-of-bound.');
+
+        $iterator->seek(30);
     }
 }

tests/Psl/SequenceTest.php

@@ -0,0 +1,27 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Psl\Tests;
+
+use PHPUnit\Framework\TestCase;
+use Psl;
+
+class SequenceTest extends TestCase
+{
+    /**
+     * @dataProvider provideData
+     */
+    public function testSequence(array $args, $expected): void
+    {
+        $this->assertSame($expected, Psl\sequence(...$args));
+    }
+
+    public function provideData(): iterable
+    {
+        yield [[], null];
+        yield [[null], null];
+        yield [[1, 2, 3], 3];
+        yield [['foo', 'bar', 'baz', 'qux'], 'qux'];
+    }
+}