Add ui_test_harness binary implementation

Adds ability to run UI components isolated from main app.

`cargo run --bin ui_test_harness -- AccountLoginView`

Signed-off-by: kernelkind <kernelkind@gmail.com>

Cargo.toml

@@ -3,6 +3,7 @@ name = "notedeck"
 version = "0.1.0"
 authors = ["William Casarin <jb55@jb55.com>"]
 edition = "2021"
+default-run = "notedeck"
 #rust-version = "1.60"
 
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
@@ -93,3 +94,11 @@ name = "android.permission.INTERNET"
 
 [package.metadata.android.application]
 label = "Damus"
+
+[[bin]]
+name = "notedeck"
+path = "src/bin/notedeck.rs"
+
+[[bin]]
+name = "ui_test_harness"
+path = "src/tests_ui/main.rs"

src/lib.rs

@@ -19,9 +19,9 @@ mod timeline;
 mod colors;
 mod profile;
 mod key_parsing;
-mod login_manager;
-mod account_login_view;
-mod app_creation;
+pub mod login_manager;
+pub mod account_login_view;
+pub mod app_creation;
 
 #[cfg(test)]
 #[macro_use]

src/tests_ui/account_login_view_test.rs

@@ -0,0 +1,21 @@
+use crate::egui_test_setup::{EguiTestCase, EguiTestSetup};
+use notedeck::account_login_view::AccountLoginView;
+use notedeck::login_manager::LoginManager;
+
+pub struct AccountLoginTest {
+    manager: LoginManager,
+}
+
+impl EguiTestCase for AccountLoginTest {
+    fn new(supr: EguiTestSetup) -> Self {
+        AccountLoginTest {
+            manager: LoginManager::new(),
+        }
+    }
+}
+
+impl eframe::App for AccountLoginTest {
+    fn update(&mut self, ctx: &egui::Context, _: &mut eframe::Frame) {
+        AccountLoginView::new(ctx, &mut self.manager).panel()
+    }
+}

src/tests_ui/egui_test_setup.rs

@@ -0,0 +1,15 @@
+use notedeck::app_creation::setup_cc;
+
+pub struct EguiTestSetup {}
+
+pub trait EguiTestCase: eframe::App {
+    fn new(supr: EguiTestSetup) -> Self;
+}
+
+impl EguiTestSetup {
+    pub fn new(cc: &eframe::CreationContext<'_>) -> Self {
+        setup_cc(cc);
+
+        EguiTestSetup {}
+    }
+}

src/tests_ui/main.rs

@@ -0,0 +1,34 @@
+mod account_login_view_test;
+mod egui_test_setup;
+use account_login_view_test::AccountLoginTest;
+use egui_test_setup::{EguiTestCase, EguiTestSetup};
+use notedeck::app_creation::generate_native_options;
+use std::env;
+
+fn run_test_app<F, T, O>(create_supr: F, create_child: O)
+where
+    F: 'static + FnOnce(&eframe::CreationContext<'_>) -> EguiTestSetup,
+    T: 'static + EguiTestCase,
+    O: 'static + FnOnce(EguiTestSetup) -> T,
+{
+    tracing_subscriber::fmt::init();
+
+    let _ = eframe::run_native(
+        "UI Test Harness",
+        generate_native_options(),
+        Box::new(|cc| Box::new(create_child(create_supr(cc)))),
+    );
+}
+
+fn main() {
+    let args: Vec<String> = env::args().collect();
+
+    if args.len() > 1 {
+        match args[1].as_str() {
+            "AccountLoginView" => run_test_app(EguiTestSetup::new, AccountLoginTest::new),
+            _ => println!("Component not found."),
+        }
+    } else {
+        println!("Please specify a component to test.");
+    }
+}