feat: add an own lock screen with the bubble and your wallpaper

tests/test_lockscreen.cpp

@@ -0,0 +1,85 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+//
+// The password on face-unlock's own lock screen, through real PAM but with
+// PAM files of its own (FU_PAM_CONFDIR), so no test ever counts as a wrong
+// password for the real account.
+
+#include "lockscreencontroller.h"
+
+#include <QCoreApplication>
+#include <QDir>
+#include <QFile>
+#include <QTemporaryDir>
+#include <QTimer>
+
+#include <cstdio>
+
+namespace
+{
+int failures = 0;
+
+void check(bool ok, const char *what)
+{
+    std::printf("%s  %s\n", ok ? "ok  " : "FAIL", what);
+    if (!ok) {
+        ++failures;
+    }
+}
+
+// Types the password into a fresh controller and waits for the verdict:
+// 1 let in, 0 refused, -1 no answer.
+int attempt(const QString &stack, const QString &password, QString *message = nullptr)
+{
+    QTemporaryDir dir;
+    QFile file(dir.filePath(QStringLiteral("face-unlock-lock")));
+    if (!file.open(QIODevice::WriteOnly)) {
+        return -1;
+    }
+    file.write(stack.toUtf8());
+    file.close();
+    qputenv("FU_PAM_CONFDIR", dir.path().toLocal8Bit());
+
+    LockScreenController lock;
+    int verdict = -1;
+    QObject::connect(&lock, &LockScreenController::authenticated, [&] {
+        verdict = 1;
+        QCoreApplication::quit();
+    });
+    QObject::connect(&lock, &LockScreenController::rejected, [&] {
+        verdict = 0;
+        QCoreApplication::quit();
+    });
+    QTimer::singleShot(5000, &QCoreApplication::quit);
+    lock.setPassword(password);
+    lock.submit();
+    QCoreApplication::exec();
+    if (message) {
+        *message = lock.message();
+    }
+    check(lock.password().isEmpty(), "the password is gone once it was checked");
+    return verdict;
+}
+} // namespace
+
+int main(int argc, char **argv)
+{
+    QCoreApplication app(argc, argv);
+
+    check(attempt(QStringLiteral("auth required pam_permit.so\n"), QStringLiteral("secret")) == 1, "a stack that says yes unlocks");
+
+    QString message;
+    check(attempt(QStringLiteral("auth required pam_deny.so\n"), QStringLiteral("secret"), &message) == 0, "a stack that says no does not");
+    check(!message.isEmpty(), "and the screen says so");
+
+    // Nothing typed: nothing to check, and nothing happens.
+    LockScreenController empty;
+    bool answered = false;
+    QObject::connect(&empty, &LockScreenController::authenticated, [&] {
+        answered = true;
+    });
+    empty.submit();
+    check(!empty.busy() && !answered, "an empty password is not sent");
+
+    std::printf("\n%s\n", failures ? "SOME CHECKS FAILED" : "all checks passed");
+    return failures ? 1 : 0;
+}

tests/test_wallpaper.cpp

@@ -0,0 +1,74 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+//
+// The desktop's picture for face-unlock's own lock screen, from what the
+// wallpaper programs say (real output of swaybg 1.2, awww 0.12, swww 0.9,
+// hyprpaper 0.7 and 0.8, wpaperd 1.3), and what the setting picks.
+
+#include "wallpaper.h"
+
+#include <QDir>
+#include <QFile>
+#include <QTemporaryDir>
+
+#include <cstdio>
+
+namespace
+{
+int failures = 0;
+
+void check(bool ok, const char *what)
+{
+    std::printf("%s  %s\n", ok ? "ok  " : "FAIL", what);
+    if (!ok) {
+        ++failures;
+    }
+}
+
+using Map = QHash<QString, QString>;
+} // namespace
+
+int main()
+{
+    check(Wallpaper::fromSwaybg({QStringLiteral("-i"), QStringLiteral("/w/a.jpg"), QStringLiteral("-m"), QStringLiteral("fill")})
+              == Map{{QString(), QStringLiteral("/w/a.jpg")}},
+          "swaybg: one picture everywhere");
+    check(Wallpaper::fromSwaybg({QStringLiteral("-o"), QStringLiteral("eDP-1"), QStringLiteral("-i"), QStringLiteral("/w/a.jpg"), QStringLiteral("--output=DP-2"),
+                                 QStringLiteral("--image=/w/b.png"), QStringLiteral("-o"), QStringLiteral("*"), QStringLiteral("-c"), QStringLiteral("000000")})
+              == Map{{QStringLiteral("eDP-1"), QStringLiteral("/w/a.jpg")}, {QStringLiteral("DP-2"), QStringLiteral("/w/b.png")}},
+          "swaybg: one per output, a colour is no picture");
+
+    check(Wallpaper::fromAwww(QStringLiteral(": winit: 1280x742, scale: 1, currently displaying: image: /w/my pic.jpg\n"))
+              == Map{{QStringLiteral("winit"), QStringLiteral("/w/my pic.jpg")}},
+          "awww: with the namespace in front, spaces in the path");
+    check(Wallpaper::fromAwww(QStringLiteral("eDP-1: 1920x1080, scale: 1, currently displaying: image: /w/a.jpg\n"
+                                             "DP-2: 2560x1440, scale: 1, currently displaying: color: 000000\n"))
+              == Map{{QStringLiteral("eDP-1"), QStringLiteral("/w/a.jpg")}},
+          "swww: a colour is no picture");
+
+    check(Wallpaper::fromList(QStringLiteral("WAYLAND-1: /w/a.jpg\nDP-2: /w/b.png\n"))
+              == Map{{QStringLiteral("WAYLAND-1"), QStringLiteral("/w/a.jpg")}, {QStringLiteral("DP-2"), QStringLiteral("/w/b.png")}},
+          "hyprpaper 0.8 and wpaperd");
+    check(Wallpaper::fromList(QStringLiteral("eDP-1 = /w/a.jpg\n")) == Map{{QStringLiteral("eDP-1"), QStringLiteral("/w/a.jpg")}}, "hyprpaper 0.7");
+    check(Wallpaper::fromList(QStringLiteral("no wallpapers active\n")).isEmpty(), "nothing shown, nothing found");
+
+    QTemporaryDir dir;
+    QFile a(dir.filePath(QStringLiteral("a.jpg")));
+    check(a.open(QIODevice::WriteOnly), "a picture to point at");
+    a.close();
+    const QUrl url = QUrl::fromLocalFile(a.fileName());
+
+    check(Wallpaper::forLock(QStringLiteral("none")).isEmpty(), "none is none");
+    check(Wallpaper::forLock(a.fileName()) == QHash<QString, QUrl>{{QString(), url}}, "a picture set goes everywhere");
+    check(Wallpaper::forLock(dir.path()) == QHash<QString, QUrl>{{QString(), url}}, "a folder set gives one from it");
+    check(Wallpaper::forLock(dir.filePath(QStringLiteral("gone.jpg"))).isEmpty(), "a picture that is gone gives none");
+
+    const QUrl b = QUrl::fromLocalFile(QStringLiteral("/w/b.png"));
+    const QHash<QString, QUrl> both{{QStringLiteral("eDP-1"), url}, {QString(), b}};
+    check(Wallpaper::pick(both, QStringLiteral("eDP-1")) == url, "an output gets its own");
+    check(Wallpaper::pick(both, QStringLiteral("DP-2")) == b, "else the one for all");
+    check(Wallpaper::pick({{QStringLiteral("eDP-1"), url}}, QStringLiteral("winit")) == url, "else any of the desktop's");
+    check(Wallpaper::pick({}, QStringLiteral("eDP-1")).isEmpty(), "and none when there is none");
+
+    std::printf("\n%s\n", failures ? "SOME CHECKS FAILED" : "all checks passed");
+    return failures ? 1 : 0;
+}