tests/emulator, .github/workflows/emulator: add

tests/emulator/test_channels_shell.py

@@ -0,0 +1,57 @@
+import bootstrap_channels
+import subprocess
+import sys
+
+from common import screenshot, wait_for
+
+STD = '/data/data/com.termux.nix/files/home/.cache/nix-on-droid-self-test'
+
+
+def run(d):
+    bootstrap_channels.run(d)
+
+    # re-login for variety. the other on-device-test (uiautomator one) does not
+    d('input text "exit"')
+    screenshot(d, 'pre-relogin')
+    d.ui.press('enter')
+
+    nod = d.app('com.termux.nix')
+    nod.launch()
+    d.ui.press('enter')
+    screenshot(d, 'post-relogin')
+    wait_for(d, 'bash-5.2$')
+
+    # run tests in a way that'd display progress in CI
+    user = d.su('stat -c %U /data/data/com.termux.nix').output.strip()
+    # WARNING: assumes `su 0` style `su` that doesn't support -c from now on
+    print(f'{user=}')
+    sys.stdout.flush()
+    sys.stderr.flush()
+    for cmd in [
+        'id',
+        f'mkdir -p {STD}',
+        f'touch {STD}/confirmation-granted',
+        '/data/data/com.termux.nix/files/usr/bin/login echo test',
+        '/data/data/com.termux.nix/files/usr/bin/login id',
+        ('cd /data/data/com.termux.nix/files/home; '
+         'pwd; '
+         'id; '
+         '/data/data/com.termux.nix/files/usr/bin/login '
+         ' nix-on-droid on-device-test')
+    ]:
+        print(f'running {cmd} as {user} with capture:')
+        p = subprocess.Popen(['adb', 'shell', 'su', '0', 'su', user,
+                              'sh', '-c', f"'{cmd}'"],
+                             encoding='utf-8',
+                             stdout=subprocess.PIPE,
+                             stderr=subprocess.STDOUT)
+        out = ''
+        while p.poll() is None:
+            line = p.stdout.readline()
+            out += line
+            sys.stdout.write('> ' + line)
+            sys.stdout.flush()
+        print(f'returncode: {p.returncode}')
+        # guess what, it can swallow the exit code!
+
+    assert 'tests, 0 failures in' in out  # of the last command