Add tests for the progress value object

tests/Feature/ParsingTest.php

@@ -21,3 +21,15 @@ it('parses JSON when calling the helper', function (string $json, array $parsed)
 it('eager loads JSON into an array', function (string $json, array $parsed) {
     expect(JsonParser::parse($json)->toArray())->toBe($parsed);
 })->with(Dataset::forParsing());
+
+it('shows the progress while parsing', function () {
+    $parser = new JsonParser(fixture('json/simple_array.json'));
+
+    expect($parser->progress()->percentage())->toBe($percentage = 0.0);
+
+    foreach ($parser as $value) {
+        expect($percentage)->toBeLessThan($percentage = $parser->progress()->percentage());
+    }
+
+    expect($parser->progress()->percentage())->toBe(100.0);
+});

tests/Unit/ValueObjects/ProgressTest.php

@@ -0,0 +1,24 @@
+<?php
+
+use Cerbero\JsonParser\ValueObjects\Progress;
+
+
+it('tracks the progress', function () {
+    $progress = new Progress();
+
+    expect($progress)
+        ->current()->toBe(0)
+        ->total()->toBeNull()
+        ->format()->toBeNull()
+        ->percentage()->toBeNull()
+        ->fraction()->toBeNull();
+
+    $progress->setTotal(200)->setCurrent(33);
+
+    expect($progress)
+        ->current()->toBe(33)
+        ->total()->toBe(200)
+        ->format()->toBe('16.5%')
+        ->percentage()->toBe(16.5)
+        ->fraction()->toBe(0.165);
+});