From 5d8533f29038b74d58a5c724708a989b8264bc1e Mon Sep 17 00:00:00 2001
From: Twooey <twooey@rhone.dev>
Date: Fri, 28 Aug 2026 10:58:29 -0400
Subject: [PATCH] Add automated tests for the 25% pricing formula and $25/$15
 shipping thresholds
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

Launch gate (design doc §5/§8) requires automated tests for both; the repo
had zero test infra until now. PHPUnit + Brain Monkey, run via `make test`
against the existing wordpress dev container.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01MqhgnCRjjVLFnZ3Jpn93Vg
---
 .gitignore                                    |    1 +
 Makefile                                      |   13 +-
 .../plugins/bookstore-core/composer.json      |    9 +
 .../plugins/bookstore-core/composer.lock      | 1928 +++++++++++++++++
 .../plugins/bookstore-core/phpunit.xml.dist   |   11 +
 .../plugins/bookstore-core/tests/TestCase.php |   21 +
 .../tests/Unit/Pricing/PricingEngineTest.php  |   65 +
 .../Unit/Shipping/BSCFreeShippingTest.php     |   74 +
 .../bookstore-core/tests/bootstrap.php        |   22 +
 9 files changed, 2143 insertions(+), 1 deletion(-)
 create mode 100644 wp-content/plugins/bookstore-core/composer.lock
 create mode 100644 wp-content/plugins/bookstore-core/phpunit.xml.dist
 create mode 100644 wp-content/plugins/bookstore-core/tests/TestCase.php
 create mode 100644 wp-content/plugins/bookstore-core/tests/Unit/Pricing/PricingEngineTest.php
 create mode 100644 wp-content/plugins/bookstore-core/tests/Unit/Shipping/BSCFreeShippingTest.php
 create mode 100644 wp-content/plugins/bookstore-core/tests/bootstrap.php

diff --git a/.gitignore b/.gitignore
index 4704ee0..9e49c24 100644
--- a/.gitignore
+++ b/.gitignore
@@ -7,6 +7,7 @@
 /.poll-deploy-*.lock
 vendor/
 node_modules/
+.phpunit.result.cache
 *.log
 .DS_Store
 /.claude/
diff --git a/Makefile b/Makefile
index ebf000e..6acf64d 100644
--- a/Makefile
+++ b/Makefile
@@ -21,7 +21,7 @@ $(shell grep -Ev '^(DB_PASSWORD|DB_ROOT_PASSWORD)=' .env.$(ENV) > $(COMPOSE_ENV_
 COMPOSE = docker compose -p bookstore-$(ENV) -f docker-compose.yml -f docker-compose.$(ENV).yml --env-file $(COMPOSE_ENV_FILE)
 CLEANUP = trap 'rm -f $(COMPOSE_ENV_FILE)' EXIT;
 
-.PHONY: up down ps logs shell wp deploy backup
+.PHONY: up down ps logs shell wp test deploy backup
 
 up:
 	$(CLEANUP) $(COMPOSE) up -d --build
@@ -43,6 +43,17 @@ shell:
 wp:
 	$(CLEANUP) $(COMPOSE) exec -u www-data wordpress wp $(ARGS)
 
+# bookstore-core's PHPUnit suite; composer install is idempotent so this
+# stays a single target rather than a separate "test-install" step. The
+# plugin dir is bind-mounted from the host at the host user's uid, which
+# www-data (uid 33 in the container) can't write into — install as root
+# (same "-u root yourself for one-off root debugging" pattern as `shell`
+# above), then chown vendor/composer.lock back to the host uid/gid so
+# they stay normal host-owned files afterward, not root-owned.
+test:
+	$(CLEANUP) $(COMPOSE) exec -u root wordpress bash -c \
+		"cd wp-content/plugins/bookstore-core && composer install --no-cache && chown -R $(shell id -u):$(shell id -g) vendor composer.lock && vendor/bin/phpunit"
+
 deploy:
 	$(CLEANUP) ./deploy/deploy.sh $(ENV)
 
diff --git a/wp-content/plugins/bookstore-core/composer.json b/wp-content/plugins/bookstore-core/composer.json
index 54b2bc7..796a9cf 100644
--- a/wp-content/plugins/bookstore-core/composer.json
+++ b/wp-content/plugins/bookstore-core/composer.json
@@ -5,9 +5,18 @@
     "require": {
         "php": ">=8.1"
     },
+    "require-dev": {
+        "phpunit/phpunit": "^10",
+        "brain/monkey": "^2.6"
+    },
     "autoload": {
         "psr-4": {
             "Bookstore\\Core\\": "includes/"
         }
+    },
+    "autoload-dev": {
+        "psr-4": {
+            "Bookstore\\Core\\Tests\\": "tests/"
+        }
     }
 }
diff --git a/wp-content/plugins/bookstore-core/composer.lock b/wp-content/plugins/bookstore-core/composer.lock
new file mode 100644
index 0000000..b10da1b
--- /dev/null
+++ b/wp-content/plugins/bookstore-core/composer.lock
@@ -0,0 +1,1928 @@
+{
+    "_readme": [
+        "This file locks the dependencies of your project to a known state",
+        "Read more about it at https://getcomposer.org/doc/01-basic-usage.md#installing-dependencies",
+        "This file is @generated automatically"
+    ],
+    "content-hash": "c94fdd43333120406863846372b12f30",
+    "packages": [],
+    "packages-dev": [
+        {
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+                    "inc/api.php"
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+                    "homepage": "https://davedevelopment.co.uk",
+                    "role": "Developer"
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+                    "email": "nathanael.esayeas@protonmail.com",
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+                    "role": "Lead Developer"
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+            "autoload": {
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+                "bin/php-parse"
+            ],
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+                }
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+                }
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+                }
+            ],
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+            ],
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+                "source": "https://github.com/nikic/PHP-Parser/tree/v5.8.0"
+            },
+            "time": "2026-07-04T14:30:18+00:00"
+        },
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+            "source": {
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+                "type": "zip",
+                "url": "https://api.github.com/repos/sebastianbergmann/version/zipball/c51fa83a5d8f43f1402e3f32a005e6262244ef17",
+                "reference": "c51fa83a5d8f43f1402e3f32a005e6262244ef17",
+                "shasum": ""
+            },
+            "require": {
+                "php": ">=8.1"
+            },
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-main": "4.0-dev"
+                }
+            },
+            "autoload": {
+                "classmap": [
+                    "src/"
+                ]
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "BSD-3-Clause"
+            ],
+            "authors": [
+                {
+                    "name": "Sebastian Bergmann",
+                    "email": "sebastian@phpunit.de",
+                    "role": "lead"
+                }
+            ],
+            "description": "Library that helps with managing the version number of Git-hosted PHP projects",
+            "homepage": "https://github.com/sebastianbergmann/version",
+            "support": {
+                "issues": "https://github.com/sebastianbergmann/version/issues",
+                "source": "https://github.com/sebastianbergmann/version/tree/4.0.1"
+            },
+            "funding": [
+                {
+                    "url": "https://github.com/sebastianbergmann",
+                    "type": "github"
+                }
+            ],
+            "time": "2023-02-07T11:34:05+00:00"
+        },
+        {
+            "name": "theseer/tokenizer",
+            "version": "1.3.1",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/theseer/tokenizer.git",
+                "reference": "b7489ce515e168639d17feec34b8847c326b0b3c"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/theseer/tokenizer/zipball/b7489ce515e168639d17feec34b8847c326b0b3c",
+                "reference": "b7489ce515e168639d17feec34b8847c326b0b3c",
+                "shasum": ""
+            },
+            "require": {
+                "ext-dom": "*",
+                "ext-tokenizer": "*",
+                "ext-xmlwriter": "*",
+                "php": "^7.2 || ^8.0"
+            },
+            "type": "library",
+            "autoload": {
+                "classmap": [
+                    "src/"
+                ]
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "BSD-3-Clause"
+            ],
+            "authors": [
+                {
+                    "name": "Arne Blankerts",
+                    "email": "arne@blankerts.de",
+                    "role": "Developer"
+                }
+            ],
+            "description": "A small library for converting tokenized PHP source code into XML and potentially other formats",
+            "support": {
+                "issues": "https://github.com/theseer/tokenizer/issues",
+                "source": "https://github.com/theseer/tokenizer/tree/1.3.1"
+            },
+            "funding": [
+                {
+                    "url": "https://github.com/theseer",
+                    "type": "github"
+                }
+            ],
+            "time": "2025-11-17T20:03:58+00:00"
+        }
+    ],
+    "aliases": [],
+    "minimum-stability": "stable",
+    "stability-flags": {},
+    "prefer-stable": false,
+    "prefer-lowest": false,
+    "platform": {
+        "php": ">=8.1"
+    },
+    "platform-dev": {},
+    "plugin-api-version": "2.9.0"
+}
diff --git a/wp-content/plugins/bookstore-core/phpunit.xml.dist b/wp-content/plugins/bookstore-core/phpunit.xml.dist
new file mode 100644
index 0000000..5ab4cba
--- /dev/null
+++ b/wp-content/plugins/bookstore-core/phpunit.xml.dist
@@ -0,0 +1,11 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<phpunit xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:noNamespaceSchemaLocation="https://schema.phpunit.de/10.5/phpunit.xsd"
+         bootstrap="tests/bootstrap.php"
+         colors="true">
+    <testsuites>
+        <testsuite name="Unit">
+            <directory>tests/Unit</directory>
+        </testsuite>
+    </testsuites>
+</phpunit>
diff --git a/wp-content/plugins/bookstore-core/tests/TestCase.php b/wp-content/plugins/bookstore-core/tests/TestCase.php
new file mode 100644
index 0000000..13f0c5b
--- /dev/null
+++ b/wp-content/plugins/bookstore-core/tests/TestCase.php
@@ -0,0 +1,21 @@
+<?php
+
+namespace Bookstore\Core\Tests;
+
+use Brain\Monkey;
+use PHPUnit\Framework\TestCase as PHPUnitTestCase;
+
+abstract class TestCase extends PHPUnitTestCase
+{
+    protected function setUp(): void
+    {
+        parent::setUp();
+        Monkey\setUp();
+    }
+
+    protected function tearDown(): void
+    {
+        Monkey\tearDown();
+        parent::tearDown();
+    }
+}
diff --git a/wp-content/plugins/bookstore-core/tests/Unit/Pricing/PricingEngineTest.php b/wp-content/plugins/bookstore-core/tests/Unit/Pricing/PricingEngineTest.php
new file mode 100644
index 0000000..ad1eae6
--- /dev/null
+++ b/wp-content/plugins/bookstore-core/tests/Unit/Pricing/PricingEngineTest.php
@@ -0,0 +1,65 @@
+<?php
+
+namespace Bookstore\Core\Tests\Unit\Pricing;
+
+use Bookstore\Core\Pricing\PricingEngine;
+use Bookstore\Core\Tests\TestCase;
+
+/**
+ * Launch gate: "25% pricing logic ... have automated tests" (design doc
+ * §5/§8). calculate_retail_price()/round_to_99()/estimate_processing_cost()
+ * are pure math with no WordPress/WooCommerce dependency, so no mocking
+ * is needed here.
+ */
+class PricingEngineTest extends TestCase
+{
+    /**
+     * @dataProvider retailPriceCases
+     */
+    public function test_calculate_retail_price_applies_25_percent_margin_formula(
+        float $supplier_base,
+        float $supplier_shipping,
+        float $expected
+    ): void {
+        $actual = PricingEngine::calculate_retail_price($supplier_base, $supplier_shipping);
+        $this->assertEqualsWithDelta($expected, $actual, 0.001);
+    }
+
+    public static function retailPriceCases(): array
+    {
+        return [
+            'small order' => [10.00, 3.00, 18.99],
+            'no supplier shipping' => [5.00, 0.00, 7.99],
+            'near a .99 boundary' => [14.20, 0.05, 20.99],
+            'zero supplier cost still covers fixed processing' => [0.00, 0.00, 0.99],
+            'larger order' => [100.00, 10.00, 152.99],
+        ];
+    }
+
+    /**
+     * @dataProvider roundTo99Cases
+     */
+    public function test_round_to_99_never_rounds_below_the_input(float $price, float $expected): void
+    {
+        $this->assertEqualsWithDelta($expected, PricingEngine::round_to_99($price), 0.001);
+    }
+
+    public static function roundTo99Cases(): array
+    {
+        return [
+            // The case the class's own docblock calls out: the old
+            // ceil($price) - 0.01 formula gave 20.99 here, which is
+            // below the $20.995 input and would erode the target margin.
+            'fractional price above the X.99 ending' => [20.995, 21.99],
+            'exact integer input' => [18.00, 18.99],
+            'already exactly X.99' => [7.99, 7.99],
+            'just above X.99' => [8.00, 8.99],
+        ];
+    }
+
+    public function test_estimate_processing_cost(): void
+    {
+        $this->assertEqualsWithDelta(0.83, PricingEngine::estimate_processing_cost(20.99), 0.001);
+        $this->assertEqualsWithDelta(3.00, PricingEngine::estimate_processing_cost(100.00), 0.001);
+    }
+}
diff --git a/wp-content/plugins/bookstore-core/tests/Unit/Shipping/BSCFreeShippingTest.php b/wp-content/plugins/bookstore-core/tests/Unit/Shipping/BSCFreeShippingTest.php
new file mode 100644
index 0000000..cc722d2
--- /dev/null
+++ b/wp-content/plugins/bookstore-core/tests/Unit/Shipping/BSCFreeShippingTest.php
@@ -0,0 +1,74 @@
+<?php
+
+namespace Bookstore\Core\Tests\Unit\Shipping;
+
+use Bookstore\Core\Shipping\BSC_Free_Shipping;
+use Bookstore\Core\Tests\TestCase;
+use Brain\Monkey\Functions;
+use Mockery;
+
+/**
+ * Launch gate: "$25/$15 shipping thresholds have automated tests" (design
+ * doc §5/§8). threshold_for_current_customer() reads membership via a raw
+ * $wpdb query and thresholds via get_option() (with the $25/$15 launch
+ * numbers as the fallback defaults) — both are stubbed here rather than
+ * hitting WordPress/a real database. The class's own docblock says
+ * thresholds are option-backed "so the launch gate's automated test can
+ * assert against the same source this reads from" — the last test below
+ * proves exactly that.
+ */
+class BSCFreeShippingTest extends TestCase
+{
+    protected function tearDown(): void
+    {
+        global $wpdb;
+        $wpdb = null;
+        parent::tearDown();
+    }
+
+    public function test_guest_gets_default_25_dollar_threshold(): void
+    {
+        Functions\when('get_current_user_id')->justReturn(0);
+        Functions\when('get_option')->alias(fn($name, $default) => $default);
+
+        $this->assertSame(25.00, BSC_Free_Shipping::threshold_for_current_customer());
+    }
+
+    public function test_logged_in_non_member_gets_default_25_dollar_threshold(): void
+    {
+        Functions\when('get_current_user_id')->justReturn(42);
+        Functions\when('get_option')->alias(fn($name, $default) => $default);
+        $this->mock_wpdb_is_free_member(false);
+
+        $this->assertSame(25.00, BSC_Free_Shipping::threshold_for_current_customer());
+    }
+
+    public function test_free_member_gets_15_dollar_threshold(): void
+    {
+        Functions\when('get_current_user_id')->justReturn(7);
+        Functions\when('get_option')->alias(fn($name, $default) => $default);
+        $this->mock_wpdb_is_free_member(true);
+
+        $this->assertSame(15.00, BSC_Free_Shipping::threshold_for_current_customer());
+    }
+
+    public function test_custom_option_override_is_respected_not_the_hardcoded_default(): void
+    {
+        Functions\when('get_current_user_id')->justReturn(0);
+        Functions\expect('get_option')
+            ->once()
+            ->with('bsc_shipping_threshold_guest', 25.00)
+            ->andReturn(29.99);
+
+        $this->assertSame(29.99, BSC_Free_Shipping::threshold_for_current_customer());
+    }
+
+    private function mock_wpdb_is_free_member(bool $is_member): void
+    {
+        global $wpdb;
+        $wpdb = Mockery::mock('wpdb');
+        $wpdb->prefix = 'wp_';
+        $wpdb->shouldReceive('prepare')->once()->andReturn('SELECT is_free_member ...');
+        $wpdb->shouldReceive('get_var')->once()->andReturn($is_member ? '1' : '0');
+    }
+}
diff --git a/wp-content/plugins/bookstore-core/tests/bootstrap.php b/wp-content/plugins/bookstore-core/tests/bootstrap.php
new file mode 100644
index 0000000..71d7262
--- /dev/null
+++ b/wp-content/plugins/bookstore-core/tests/bootstrap.php
@@ -0,0 +1,22 @@
+<?php
+
+/**
+ * Unit-test bootstrap: pure PHPUnit + Brain Monkey, not a full WordPress
+ * bootstrap. includes/*.php all guard on `defined('ABSPATH') || exit;`
+ * at file-load time, and BSC_Free_Shipping extends \WC_Shipping_Method
+ * (a WooCommerce core class) — both need to exist before Composer's
+ * autoloader ever pulls those files in, hence defining/stubbing them
+ * here rather than per test case.
+ */
+
+require __DIR__ . '/../vendor/autoload.php';
+
+if (!defined('ABSPATH')) {
+    define('ABSPATH', __DIR__ . '/');
+}
+
+if (!class_exists(\WC_Shipping_Method::class)) {
+    class WC_Shipping_Method
+    {
+    }
+}