[education/labplot] tests/backend/core: Added a test to check the loading of all example projecs to make sure we don't break anything in the serialization/deserialization

Git commit 4cb516b9eeec08a331ebfcc3e04f540d1f9c0cdb by Alexander Semke.
Committed on 10/08/2026 at 20:55.
Pushed by asemke into branch 'master'.

Added a test to check the loading of all example projecs to make sure we don't break anything in the serialization/deserialization
logic for all aspects available in our examples.

M  +30   -1    tests/backend/core/AbstractAspectTest.cpp
M  +2    -0    tests/backend/core/AbstractAspectTest.h
M  +1    -0    tests/backend/core/CMakeLists.txt

https://invent.kde.org/education/labplot/-/commit/4cb516b9eeec08a331ebfcc3e04f540d1f9c0cdb

diff --git a/tests/backend/core/AbstractAspectTest.cpp b/tests/backend/core/AbstractAspectTest.cpp
index 751778c7ff..59ce7e7351 100644
--- a/tests/backend/core/AbstractAspectTest.cpp
+++ b/tests/backend/core/AbstractAspectTest.cpp
@@ -4,7 +4,7 @@
 	Description          : Tests for AbstractAspect
 	--------------------------------------------------------------------
 	SPDX-FileCopyrightText: 2023 Martin Marmsoler <[email protected]>
-	SPDX-FileCopyrightText: 2023-2025 Alexander Semke <[email protected]>
+	SPDX-FileCopyrightText: 2023-2026 Alexander Semke <[email protected]>
 
 	SPDX-License-Identifier: GPL-2.0-or-later
 */
@@ -23,6 +23,8 @@
 
 #include "backend/lib/UndoStack.h"
 
+#include <QDir>
+
 void AbstractAspectTest::name() {
 	Project project;
 
@@ -963,4 +965,31 @@ void AbstractAspectTest::reparentPreservesOrder() {
 	QCOMPARE(treeModel.data(treeModel.index(0, 0, projectIdx)).toString(), QStringLiteral("Folder"));
 }
 
+/*!
+* \brief AbstractAspectTest::loadExampleProjects
+ * Load all example projects in the examples directory and verify that they can be loaded without errors.
+*/
+void AbstractAspectTest::loadExampleProjects() {
+	const QDir examplesDir(QStringLiteral(LABPLOT_DATA_DIR "/examples"));
+	QVERIFY2(examplesDir.exists(), "examples directory not found");
+
+	// collect .lml files from all subdirectories
+	QFileInfoList files;
+	QDirIterator it(examplesDir.absolutePath(), {QStringLiteral("*.lml")}, QDir::Files, QDirIterator::Subdirectories);
+	while (it.hasNext())
+		files << QFileInfo(it.next());
+
+	QVERIFY2(!files.isEmpty(), "no .lml example files found");
+
+	for (const auto& fi : files) {
+		// skip project that require python or Maxima runtimes that are not available in the CI environment
+		if (fi.fileName() == QLatin1String("Seasonal Decomposition with STL and MSTL.lml") || fi.fileName() == QLatin1String("Maxima Tutorial for Beginners.lml"))
+			continue;
+
+		Project project;
+		const bool ok = project.load(fi.absoluteFilePath());
+		QVERIFY2(ok, qPrintable(QStringLiteral("failed to load: ") + fi.fileName()));
+	}
+}
+
 QTEST_MAIN(AbstractAspectTest)
diff --git a/tests/backend/core/AbstractAspectTest.h b/tests/backend/core/AbstractAspectTest.h
index b19fde44e9..b1113408ce 100644
--- a/tests/backend/core/AbstractAspectTest.h
+++ b/tests/backend/core/AbstractAspectTest.h
@@ -44,6 +44,8 @@ private Q_SLOTS:
 	void reparentToNestedFolder();
 	void reparentFolder();
 	void reparentPreservesOrder();
+
+	void loadExampleProjects();
 };
 
 #endif // ABSTRACTASPECTTEST_H
diff --git a/tests/backend/core/CMakeLists.txt b/tests/backend/core/CMakeLists.txt
index f9aa4e84b0..ea2032d0cc 100644
--- a/tests/backend/core/CMakeLists.txt
+++ b/tests/backend/core/CMakeLists.txt
@@ -4,6 +4,7 @@ if(ENABLE_TEST_BACKEND_CORE)
     add_executable (AbstractAspectTest AbstractAspectTest.cpp)
 
     target_link_libraries(AbstractAspectTest labplotbackendlib labplotlib labplottest)
+    target_compile_definitions(AbstractAspectTest PRIVATE LABPLOT_DATA_DIR="${CMAKE_SOURCE_DIR}/data")
 
     add_test(NAME AbstractAspectTest COMMAND AbstractAspectTest)
 endif()