Tests for ParsingInput

Author: gapple

src/ParsingInput.php

@@ -58,6 +58,7 @@ public function getChar(): string
     public function consume(int $length, string $expected = null): string
     {
         assert($length > 0);
+        assert($expected === null || strlen($expected) === $length);
 
         if ($length > strlen($this->value) - $this->position) {
             throw new \RuntimeException('Reached end of value');

tests/ParsingInputTest.php

@@ -0,0 +1,55 @@
+<?php
+
+namespace gapple\Tests\StructuredFields;
+
+use gapple\StructuredFields\ParsingInput;
+use PHPUnit\Framework\TestCase;
+
+class ParsingInputTest extends TestCase
+{
+    public function testGetEmptyChar(): void
+    {
+        $input = new ParsingInput('');
+        $this->expectException(\RuntimeException::class);
+        $input->getChar();
+    }
+
+    /**
+     * @return array<string, array{string, bool, string}>
+     */
+    public static function trimProvider(): array
+    {
+        return [
+            'space' => ['  test ', false, 'test '],
+            'ows' => [" \t test ", true, 'test '],
+            'non-ows' => [" \t test ", false, "\t test "],
+        ];
+    }
+
+    /**
+     * @dataProvider trimProvider
+     */
+    public function testTrim(string $value, bool $ows, string $expected): void
+    {
+        $input = new ParsingInput($value);
+        $input->trim($ows);
+
+        $this->assertEquals($expected, $input->remaining());
+    }
+
+    public function testConsumeExcess(): void
+    {
+        $input = new ParsingInput('test');
+        $this->expectException(\RuntimeException::class);
+        $this->expectExceptionMessage('Reached end of value');
+        $input->consume(5);
+    }
+
+    public function testConsumeNotMatched(): void
+    {
+        $input = new ParsingInput('test');
+        $this->expectException(\RuntimeException::class);
+        $this->expectExceptionMessage('Unexpected character');
+        $input->consumeString('foo');
+    }
+}