Add first Linux shell tests (#18159)

BUILD.gn

@@ -106,6 +106,10 @@ group("flutter") {
           "//flutter/shell/platform/windows/client_wrapper:client_wrapper_windows_unittests",
         ]
       }
+      if (is_linux) {
+        public_deps +=
+            [ "//flutter/shell/platform/linux:flutter_linux_unittests" ]
+      }
     }
   }
 }

ci/licenses_golden/licenses_flutter

@@ -1174,6 +1174,7 @@ FILE: ../../../flutter/shell/platform/glfw/text_input_plugin.h
 FILE: ../../../flutter/shell/platform/linux/fl_binary_messenger.cc
 FILE: ../../../flutter/shell/platform/linux/fl_binary_messenger_private.h
 FILE: ../../../flutter/shell/platform/linux/fl_dart_project.cc
+FILE: ../../../flutter/shell/platform/linux/fl_dart_project_test.cc
 FILE: ../../../flutter/shell/platform/linux/fl_engine.cc
 FILE: ../../../flutter/shell/platform/linux/fl_engine_private.h
 FILE: ../../../flutter/shell/platform/linux/fl_renderer.cc

shell/platform/linux/BUILD.gn

@@ -5,6 +5,7 @@
 assert(is_linux)
 
 import("//flutter/shell/platform/glfw/config.gni")
+import("//flutter/testing/testing.gni")
 
 group("linux") {
   deps = [
@@ -80,6 +81,31 @@ source_set("flutter_linux") {
   ]
 }
 
+test_fixtures("flutter_linux_fixtures") {
+  fixtures = []
+}
+
+executable("flutter_linux_unittests") {
+  testonly = true
+
+  sources = [
+    "fl_dart_project_test.cc",
+  ]
+
+  public_configs = [ "//flutter:config" ]
+
+  configs += [ "//flutter/shell/platform/linux/config:gtk" ]
+
+  # Set flag to allow public headers to be directly included (library users should not do this)
+  defines = [ "FLUTTER_LINUX_COMPILATION" ]
+
+  deps = [
+    ":flutter_linux",
+    ":flutter_linux_fixtures",
+    "//flutter/testing",
+  ]
+}
+
 shared_library("flutter_linux_gtk") {
   deps = [
     ":flutter_linux",

shell/platform/linux/fl_dart_project_test.cc

@@ -0,0 +1,37 @@
+// Copyright 2013 The Flutter Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "flutter/shell/platform/linux/public/flutter_linux/fl_dart_project.h"
+#include "gtest/gtest.h"
+
+#include <gmodule.h>
+
+TEST(FlDartProjectTest, GetPath) {
+  g_autoptr(FlDartProject) project =
+      fl_dart_project_new("/projects/my_dart_project");
+  EXPECT_STREQ(fl_dart_project_get_path(project), "/projects/my_dart_project");
+}
+
+TEST(FlDartProjectTest, GetPathRelative) {
+  g_autoptr(FlDartProject) project = fl_dart_project_new("foo");
+  g_autofree gchar* exe_path = g_file_read_link("/proc/self/exe", nullptr);
+  ASSERT_TRUE(exe_path != nullptr);
+  g_autofree gchar* dir = g_path_get_dirname(exe_path);
+  g_autofree gchar* expected_path = g_build_filename(dir, "foo", nullptr);
+  EXPECT_STREQ(fl_dart_project_get_path(project), expected_path);
+}
+
+TEST(FlDartProjectTest, GetAssetsPath) {
+  g_autoptr(FlDartProject) project =
+      fl_dart_project_new("/projects/my_dart_project");
+  g_autofree gchar* assets_path = fl_dart_project_get_assets_path(project);
+  EXPECT_STREQ(assets_path, "/projects/my_dart_project/flutter_assets");
+}
+
+TEST(FlDartProjectTest, GetIcuDataPath) {
+  g_autoptr(FlDartProject) project =
+      fl_dart_project_new("/projects/my_dart_project");
+  g_autofree gchar* assets_path = fl_dart_project_get_icu_data_path(project);
+  EXPECT_STREQ(assets_path, "/projects/my_dart_project/icudtl.dat");
+}

shell/platform/linux/public/flutter_linux/fl_dart_project.h

@@ -71,7 +71,7 @@ const gchar* fl_dart_project_get_path(FlDartProject* project);
  * application.
  *
  * Returns: (type filename): a file path, e.g.
- * "/projects/my_dart_project/assets"
+ * "/projects/my_dart_project/flutter_assets"
  */
 gchar* fl_dart_project_get_assets_path(FlDartProject* project);
 

testing/run_tests.py

@@ -153,6 +153,9 @@ def RunCCTests(build_dir, filter):
   if IsLinux():
     RunEngineExecutable(build_dir, 'txt_unittests', filter, shuffle_flags)
 
+  if IsLinux():
+    RunEngineExecutable(build_dir, 'flutter_linux_unittests', filter, shuffle_flags)
+
 
 def RunEngineBenchmarks(build_dir, filter):
   print("Running Engine Benchmarks.")