Migrate tests to Pest (#8)

Reviewed-on: #8

tests/Unit/Query/CountTest.php

@@ -0,0 +1,51 @@
+<?php
+/**
+ * @author Daniel J. Summers <daniel@bitbadger.solutions>
+ * @license MIT
+ */
+
+declare(strict_types=1);
+
+use BitBadger\PDODocument\{Configuration, DocumentException, Field, Mode};
+use BitBadger\PDODocument\Query\Count;
+
+pest()->group('unit');
+
+afterEach(function () { Configuration::overrideMode(null); });
+
+describe('::all()', function () {
+    test('generates the correct SQL', function () {
+        expect(Count::all('a_table'))->toBe('SELECT COUNT(*) FROM a_table');
+    });
+});
+
+describe('::byFields()', function () {
+    test('generates the correct SQL', function () {
+        Configuration::overrideMode(Mode::SQLite);
+        expect(Count::byFields('somewhere', [Field::greater('errors', 10, ':errors')]))
+            ->toBe("SELECT COUNT(*) FROM somewhere WHERE data->>'errors' > :errors");
+    });
+});
+
+describe('::byContains()', function () {
+    test('generates the correct SQL [PostgreSQL]', function () {
+        Configuration::overrideMode(Mode::PgSQL);
+        expect(Count::byContains('the_table'))->toBe('SELECT COUNT(*) FROM the_table WHERE data @> :criteria');
+    })->group('postgresql');
+    test('throws an exception [SQLite]', function () {
+        Configuration::overrideMode(Mode::SQLite);
+        expect(fn () => Count::byContains(''))->toThrow(DocumentException::class);
+    })->group('sqlite');
+});
+
+describe('::byJsonPath()', function () {
+    test('generates the correct SQL [PostgreSQL]', function () {
+        Configuration::overrideMode(Mode::PgSQL);
+        expect(Count::byJsonPath('a_table'))
+            ->toBe('SELECT COUNT(*) FROM a_table WHERE jsonb_path_exists(data, :path::jsonpath)');
+    })->group('postgresql');
+    test('throws an exception [SQLite]', function () {
+        Configuration::overrideMode(Mode::SQLite);
+        expect(fn () => Count::byJsonPath(''))->toThrow(DocumentException::class);
+    })->group('sqlite');
+});