Added SaveTest for coverage of writing files

tests/methods/SaveTest.php

@@ -0,0 +1,46 @@
+<?php
+
+class SaveTest extends PHPUnit\Framework\TestCase {
+
+    /** @var parseCSV */
+    private $csv;
+
+    private $temp_filename;
+
+    /**
+     * Setup our test environment objects; will be called before each test.
+     */
+    public function setUp() {
+        $this->csv = new parseCSV();
+        $this->csv->auto(__DIR__ . '/../example_files/single_column.csv');
+
+        // Remove last 2 lines to simplify comparison
+        unset($this->csv->data[2], $this->csv->data[3]);
+
+        $temp_dir = str_replace("\\", '/', sys_get_temp_dir());
+        if (substr($temp_dir, -1) != '/') {
+            // From the PHP.net documentation:
+            // This function does not always add trailing slash. This behaviour
+            // is inconsistent across systems.
+            $temp_dir .= '/';
+        }
+        $this->temp_filename = $temp_dir . 'parsecsv_test_file.csv';
+    }
+
+    public function testSaveWithDefaultSettings() {
+        $expected = "SMS\r0444\r5555\r";
+        $this->saveAndCompare($expected);
+    }
+
+    public function testAllQuotes() {
+        $this->csv->enclose_all = true;
+        $expected = "\"SMS\"\r\"0444\"\r\"5555\"\r";
+        $this->saveAndCompare($expected);
+    }
+
+    private function saveAndCompare($expected) {
+        $this->csv->save($this->temp_filename);
+        $content = file_get_contents($this->temp_filename);
+        $this->assertEquals($expected, $content);
+    }
+}