1 files changed, 143 insertions, 0 deletions
diff --git a/tools/permission_prompt_test.py b/tools/permission_prompt_test.py
new file mode 100755
index 000000000..2bc24d12c
--- /dev/null
+++ b/tools/permission_prompt_test.py
@@ -0,0 +1,143 @@
+#!/usr/bin/env python
+import os
+import pty
+import select
+import subprocess
+
+from util import build_path, executable_suffix
+
+PERMISSIONS_PROMPT_TEST_TS = "tools/permission_prompt_test.ts"
+
+
+# This function is copied from:
+# https://gist.github.com/hayd/4f46a68fc697ba8888a7b517a414583e
+# https://stackoverflow.com/q/52954248/1240268
+def tty_capture(cmd, bytes_input):
+    """Capture the output of cmd with bytes_input to stdin,
+    with stdin, stdout and stderr as TTYs."""
+    mo, so = pty.openpty()  # provide tty to enable line-buffering
+    me, se = pty.openpty()
+    mi, si = pty.openpty()
+    fdmap = {mo: 'stdout', me: 'stderr', mi: 'stdin'}
+
+    p = subprocess.Popen(
+        cmd, bufsize=1, stdin=si, stdout=so, stderr=se, close_fds=True)
+    os.write(mi, bytes_input)
+
+    timeout = .04  # seconds
+    res = {'stdout': b'', 'stderr': b''}
+    while True:
+        ready, _, _ = select.select([mo, me], [], [], timeout)
+        if ready:
+            for fd in ready:
+                data = os.read(fd, 512)
+                if not data:
+                    break
+                res[fdmap[fd]] += data
+        elif p.poll() is not None:  # select timed-out
+            break  # p exited
+    for fd in [si, so, se, mi, mo, me]:
+        os.close(fd)  # can't do it sooner: it leads to errno.EIO error
+    p.wait()
+    return p.returncode, res['stdout'], res['stderr']
+
+
+class Prompt(object):
+    def __init__(self, deno_exe):
+        self.deno_exe = deno_exe
+
+    def run(self,
+            arg,
+            bytes_input,
+            allow_write=False,
+            allow_net=False,
+            allow_env=False):
+        "Returns (return_code, stdout, stderr)."
+        cmd = [self.deno_exe, PERMISSIONS_PROMPT_TEST_TS, arg]
+        if allow_write:
+            cmd.append("--allow-write")
+        if allow_net:
+            cmd.append("--allow-net")
+        if allow_env:
+            cmd.append("--allow-env")
+        return tty_capture(cmd, bytes_input)
+
+    def warm_up(self):
+        # ignore the ts compiling message
+        self.run('needsWrite', b'', allow_write=True)
+
+    def test_write_yes(self):
+        code, stdout, stderr = self.run('needsWrite', b'y\n')
+        assert code == 0
+        assert stdout == b''
+        assert b'Deno requests write access' in stderr
+
+    def test_write_arg(self):
+        code, stdout, stderr = self.run('needsWrite', b'', allow_write=True)
+        assert code == 0
+        assert stdout == b''
+        assert stderr == b''
+
+    def test_write_no(self):
+        code, stdout, stderr = self.run('needsWrite', b'N\n')
+        assert code == 1
+        # FIXME this error message should be in stderr
+        assert b'PermissionDenied: permission denied' in stdout
+        assert b'Deno requests write access' in stderr
+
+    def test_env_yes(self):
+        code, stdout, stderr = self.run('needsEnv', b'y\n')
+        assert code == 0
+        assert stdout == b''
+        assert b'Deno requests access to environment' in stderr
+
+    def test_env_arg(self):
+        code, stdout, stderr = self.run('needsEnv', b'', allow_env=True)
+        assert code == 0
+        assert stdout == b''
+        assert stderr == b''
+
+    def test_env_no(self):
+        code, stdout, stderr = self.run('needsEnv', b'N\n')
+        assert code == 1
+        # FIXME this error message should be in stderr
+        assert b'PermissionDenied: permission denied' in stdout
+        assert b'Deno requests access to environment' in stderr
+
+    def test_net_yes(self):
+        code, stdout, stderr = self.run('needsEnv', b'y\n')
+        assert code == 0
+        assert stdout == b''
+        assert b'Deno requests access to environment' in stderr
+
+    def test_net_arg(self):
+        code, stdout, stderr = self.run('needsNet', b'', allow_net=True)
+        assert code == 0
+        assert stdout == b''
+        assert stderr == b''
+
+    def test_net_no(self):
+        code, stdout, stderr = self.run('needsNet', b'N\n')
+        assert code == 1
+        # FIXME this error message should be in stderr
+        assert b'PermissionDenied: permission denied' in stdout
+        assert b'Deno requests network access' in stderr
+
+
+def permission_prompt_test(deno_exe):
+    p = Prompt(deno_exe)
+    p.warm_up()
+    p.test_write_yes()
+    p.test_write_arg()
+    p.test_write_no()
+    p.test_env_yes()
+    p.test_env_arg()
+    p.test_env_no()
+    p.test_net_yes()
+    p.test_net_arg()
+    p.test_net_no()
+
+
+if __name__ == "__main__":
+    deno_exe = os.path.join(build_path(), "deno" + executable_suffix)
+    permission_prompt_test(deno_exe)