From 7ce28c0ba8c4a00e0ed467db7665a20b3e9360a6 Mon Sep 17 00:00:00 2001
From: Brendan Szymanski <hello@bscubed.dev>
Date: Wed, 1 Jul 2026 20:44:30 -0400
Subject: [PATCH] Add MultiPackageAnalyzer dependency resolution tests

---
 .../MultiPackageAnalysisTests.swift           | 91 +++++++++++++++++++
 1 file changed, 91 insertions(+)
 create mode 100644 Tests/SwiftGtkGenCoreTests/MultiPackageAnalysisTests.swift

diff --git a/Tests/SwiftGtkGenCoreTests/MultiPackageAnalysisTests.swift b/Tests/SwiftGtkGenCoreTests/MultiPackageAnalysisTests.swift
new file mode 100644
index 0000000..a6f3c60
--- /dev/null
+++ b/Tests/SwiftGtkGenCoreTests/MultiPackageAnalysisTests.swift
@@ -0,0 +1,91 @@
+import Foundation
+import Testing
+@testable import SwiftGtkGenCore
+
+@Suite("MultiPackageAnalyzer")
+struct MultiPackageAnalysisTests {
+
+    /// Builds a minimal multi-package config from mock GIR XML.
+    private func buildConfig() throws -> MonorepoConfig {
+        let tmpDir = NSTemporaryDirectory() + "monorepo_test_\(UUID().uuidString)"
+        try FileManager.default.createDirectory(atPath: tmpDir, withIntermediateDirectories: true)
+
+        // GLib: root, no includes (real GLib GIR has no <include> elements)
+        let glibGIR = """
+        <?xml version="1.0"?>
+        <repository version="1.2"
+            xmlns="http://www.gtk.org/introspection/core/1.0"
+            xmlns:c="http://www.gtk.org/introspection/c/1.0"
+            xmlns:glib="http://www.gtk.org/introspection/glib/1.0">
+          <c:include name="glib.h"/>
+          <package name="glib-2.0"/>
+          <namespace name="GLib" version="2.0"
+            shared-library="libglib-2.0.so.0"
+            c:identifier-prefixes="G">
+            <class name="Object" c:type="GObject" parent="GObject.InitiallyUnowned"
+                   glib:type-name="GObject" glib:get-type="g_object_get_type"/>
+            <enumeration name="TestEnum" glib:type-name="GTestEnum"
+                glib:get-type="g_test_enum_get_type" c:type="GTestEnum">
+              <member name="value" value="0" c:identifier="G_TEST_ENUM_VALUE"/>
+            </enumeration>
+          </namespace>
+        </repository>
+        """
+        let glibPath = tmpDir + "/GLib-2.0.gir"
+        try glibGIR.write(toFile: glibPath, atomically: true, encoding: .utf8)
+
+        // GObject: includes GLib
+        let gobjectGIR = """
+        <?xml version="1.0"?>
+        <repository version="1.2"
+            xmlns="http://www.gtk.org/introspection/core/1.0"
+            xmlns:c="http://www.gtk.org/introspection/c/1.0"
+            xmlns:glib="http://www.gtk.org/introspection/glib/1.0">
+          <include name="GLib" version="2.0"/>
+          <c:include name="glib-object.h"/>
+          <package name="gobject-2.0"/>
+          <namespace name="GObject" version="2.0"
+            shared-library="libgobject-2.0.so.0"
+            c:identifier-prefixes="G">
+            <class name="InitiallyUnowned" c:type="GInitiallyUnowned"
+                   parent="GObject.Object" glib:type-name="GInitiallyUnowned"
+                   glib:get-type="g_initially_unowned_get_type"/>
+            <class name="ParamSpec" c:type="GParamSpec" parent="GObject.InitiallyUnowned"
+                   glib:type-name="GParamSpec" glib:get-type="g_param_spec_get_type"/>
+          </namespace>
+        </repository>
+        """
+        let gobjPath = tmpDir + "/GObject-2.0.gir"
+        try gobjectGIR.write(toFile: gobjPath, atomically: true, encoding: .utf8)
+
+        let packages: [PackageEntry] = [
+            PackageEntry(name: "GLib", girPath: glibPath),
+            PackageEntry(name: "GObject", girPath: gobjPath),
+        ]
+
+        return MonorepoConfig(outputDir: tmpDir, packages: packages)
+    }
+
+    @Test func resolvesDependencyGraph() throws {
+        let config = try buildConfig()
+        let analyzer = MultiPackageAnalyzer(config: config)
+        let analysis = try analyzer.analyze()
+
+        #expect(analysis.repositories.count == 2)
+        #expect(analysis.directDependencies["GLib"] == [])
+        #expect(analysis.directDependencies["GObject"]?.contains("GLib") == true)
+        #expect(analysis.transitiveDependencies["GObject"]?.contains("GLib") == true)
+        #expect(analysis.transitiveDependencies["GLib"]?.isEmpty == true)
+    }
+
+    @Test func generatesPerPackageConfigs() throws {
+        let config = try buildConfig()
+        let analyzer = MultiPackageAnalyzer(config: config)
+        let analysis = try analyzer.analyze()
+
+        #expect(analysis.packageConfigs["GLib"]?.library == "GLib")
+        // GObject depends on GLib
+        let gobjExtLibs = analysis.packageConfigs["GObject"]?.externalLibraries
+        #expect(gobjExtLibs?.contains("GLib") == true)
+    }
+}