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windows smoke: fake capture devices in the opt-in test mode

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The CI VM has no microphone (getUserMedia → NotFoundError). With
LOTUS_WEBVIEW2_DEBUG_PORT set the app also passes
--use-fake-device-for-media-stream; permission requests still go through
the real PermissionRequested handler.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01PPmy3tPq869XDW4njjVaKA
This commit is contained in:
Lotus CI
2026-09-30 10:32:45 -04:00
co-authored by Claude Opus 5.5
parent e2e43aa08c
commit 12ad4bf681
1 changed files with 11 additions and 5 deletions
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src-tauri/src/lib.rs
+11 -5
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@@ -1294,9 +1294,12 @@ pub fn run() {
///
/// cinny-desktop #19: `LOTUS_WEBVIEW2_DEBUG_PORT=<port>` in the environment
/// opens WebView2's DevTools port on localhost so the Windows smoke test can
/// drive the installed app. WebView2's own `WEBVIEW2_ADDITIONAL_BROWSER_ARGUMENTS`
/// doesn't apply because the app sets its arguments explicitly. Off unless the
/// variable holds a valid port; only whoever launches the app can set it.
/// drive the installed app, and gives it Chromium's fake capture devices (the
/// CI VM has no microphone; permission requests still go through the app's
/// real PermissionRequested handler). WebView2's own
/// `WEBVIEW2_ADDITIONAL_BROWSER_ARGUMENTS` doesn't apply because the app sets
/// its arguments explicitly. Off unless the variable holds a valid port; only
/// whoever launches the app can set it.
pub(crate) fn webview2_browser_args(debug_port: Option<&str>) -> String {
let mut args = String::from(
"--disable-features=msWebOOUI,msPdfOOUI --disable-background-timer-throttling --disable-renderer-backgrounding --disable-backgrounding-occluded-windows",
@@ -1306,7 +1309,9 @@ pub(crate) fn webview2_browser_args(debug_port: Option<&str>) -> String {
.filter(|p| *p >= 1024)
{
eprintln!("webview: DevTools port {port} open (LOTUS_WEBVIEW2_DEBUG_PORT)");
args.push_str(&format!(" --remote-debugging-port={port}"));
args.push_str(&format!(
" --remote-debugging-port={port} --use-fake-device-for-media-stream"
));
}
args
}
@@ -1320,7 +1325,8 @@ mod webview2_args_tests {
let base = webview2_browser_args(None);
assert!(base.contains("--disable-renderer-backgrounding"));
assert!(!base.contains("remote-debugging"));
assert!(webview2_browser_args(Some("9222")).ends_with(" --remote-debugging-port=9222"));
assert!(webview2_browser_args(Some("9222"))
.ends_with(" --remote-debugging-port=9222 --use-fake-device-for-media-stream"));
for bad in ["", "abc", "80", "70000", "9222 --evil", "-1"] {
assert_eq!(webview2_browser_args(Some(bad)), base, "{bad}");
}