test: align e2e tests with xa11y 0.7 + JSON observe default

After merging main (which flipped `observe --format` default to json in
PR #23) on top of the xa11y 0.7 update, two test suites needed
realignment:

- tests/e2e_live.rs: tests asserting `<application` / `<` in observe
  stdout now pass `--format xml` explicitly, since the default is JSON.
- tests/e2e_cli.rs: `test_scroll_without_element_no_state_needed`
  previously expected a missing-platform-tool failure, but xa11y 0.7
  performs scroll natively on macOS/Windows/X11. The test now asserts
  the actual invariant (no observe-state required) by checking stderr
  doesn't mention "state" / "observe", so it works whether scroll
  succeeds (native input sim) or fails (Wayland's Unsupported error).

Author: crowecawcaw

tests/e2e_cli.rs

@@ -196,13 +196,17 @@ fn test_scroll_invalid_direction() {
 
 #[test]
 fn test_scroll_without_element_no_state_needed() {
-    // Scroll without --element should not require state, only platform tools
-    let result = agent_desktop_cmd()
+    // Scroll without --element should not require state.
+    // On platforms with native input simulation (macOS/Windows/X11) it succeeds;
+    // on Wayland it fails with an unsupported-platform error rather than a
+    // missing-state error.
+    let assert = agent_desktop_cmd()
         .args(["scroll", "--direction", "up"])
-        .assert()
-        .failure();
+        .assert();
 
-    result.stderr(predicate::str::contains("xdotool").or(predicate::str::contains("screenshot tool").or(predicate::str::contains("scroll"))));
+    assert
+        .stderr(predicate::str::contains("state").not())
+        .stderr(predicate::str::contains("observe").not());
 }
 
 // =============================================================================

tests/e2e_live.rs

@@ -51,7 +51,7 @@ fn screenshot_captures_a_file() {
 #[cfg(target_os = "linux")]
 fn observe_returns_xml() {
     agent_desktop()
-        .arg("observe")
+        .args(["observe", "--format", "xml"])
         .assert()
         .success()
         .stdout(predicate::str::contains("<application"));
@@ -61,7 +61,7 @@ fn observe_returns_xml() {
 #[cfg(target_os = "macos")]
 fn observe_returns_xml() {
     agent_desktop()
-        .arg("observe")
+        .args(["observe", "--format", "xml"])
         .assert()
         .success()
         .stdout(predicate::str::contains("<application"));
@@ -71,7 +71,7 @@ fn observe_returns_xml() {
 #[cfg(target_os = "linux")]
 fn observe_app_returns_elements() {
     agent_desktop()
-        .args(["observe", "--app", "gedit"])
+        .args(["observe", "--app", "gedit", "--format", "xml"])
         .assert()
         .success()
         .stdout(predicate::str::contains("<"));
@@ -81,7 +81,7 @@ fn observe_app_returns_elements() {
 #[cfg(target_os = "macos")]
 fn observe_app_finder_returns_elements() {
     agent_desktop()
-        .args(["observe", "--app", "Finder"])
+        .args(["observe", "--app", "Finder", "--format", "xml"])
         .assert()
         .success()
         .stdout(predicate::str::contains("<application"))
@@ -92,7 +92,7 @@ fn observe_app_finder_returns_elements() {
 #[cfg(target_os = "macos")]
 fn observe_app_textedit_returns_elements() {
     agent_desktop()
-        .args(["observe", "--app", "TextEdit"])
+        .args(["observe", "--app", "TextEdit", "--format", "xml"])
         .assert()
         .success()
         .stdout(predicate::str::contains("<"));
@@ -102,7 +102,7 @@ fn observe_app_textedit_returns_elements() {
 #[cfg(target_os = "windows")]
 fn observe_pid_returns_elements() {
     agent_desktop()
-        .args(["observe", "--pid", &notepad_pid()])
+        .args(["observe", "--pid", &notepad_pid(), "--format", "xml"])
         .assert()
         .success()
         .stdout(predicate::str::contains("<"));
@@ -185,7 +185,7 @@ fn observe_invalid_app_fails() {
 #[cfg(target_os = "windows")]
 fn observe_returns_xml() {
     agent_desktop()
-        .arg("observe")
+        .args(["observe", "--format", "xml"])
         .assert()
         .success()
         .stdout(predicate::str::contains("<application"));
@@ -435,7 +435,7 @@ fn interact_press_on_element() {
 #[cfg(target_os = "macos")]
 fn observe_textedit_returns_elements() {
     agent_desktop()
-        .args(["observe", "--app", "TextEdit"])
+        .args(["observe", "--app", "TextEdit", "--format", "xml"])
         .assert()
         .success()
         .stdout(predicate::str::contains("<"));