tests: Specifically #require fish_test_helper when needed

tests/pexpects/exit_nohang.py

@@ -26,6 +26,9 @@ fish_pid = sp.spawn.pid
 # Launch fish_test_helper.
 expect_prompt()
 exe_path = os.environ.get("fish_test_helper")
+if not exe_path:
+    sys.exit(127)
+
 sp.sendline(exe_path + " nohup_wait")
 
 # We expect it to transfer tty ownership to fish_test_helper.

tests/pexpects/fg.py

@@ -2,6 +2,7 @@
 from pexpect_helper import SpawnedProc
 import platform
 import subprocess
+import os
 
 sp = SpawnedProc()
 send, sendline, sleep, expect_prompt, expect_re, expect_str = (
@@ -75,6 +76,10 @@ expect_prompt()
 sendline("jobs")
 expect_prompt("jobs: There are no jobs")
 
+if not os.environ.get("fish_test_helper", ""):
+    import sys
+    sys.exit(127)
+
 # Regression test for #2214: foregrounding from a key binding works!
 sendline(r"bind ctrl-r 'fg >/dev/null 2>/dev/null'")
 expect_prompt()

tests/pexpects/pipeline.py

@@ -1,5 +1,6 @@
 #!/usr/bin/env python3
 from pexpect_helper import SpawnedProc
+import os
 
 sp = SpawnedProc()
 send, sendline, expect_prompt, expect_str = (
@@ -13,6 +14,10 @@ expect_prompt()
 sendline("function echo_wrap ; /bin/echo $argv ; sleep 0.1; end")
 expect_prompt()
 
+if not os.environ.get("fish_test_helper", ""):
+    import sys
+    sys.exit(127)
+
 for i in range(5):
     sendline(
         "echo_wrap 1 2 3 4 | $fish_test_helper become_foreground_then_print_stderr ; or exit 1"

tests/pexpects/stdin_nonblocking.py

@@ -12,6 +12,10 @@ send, sendline, expect_prompt, expect_str, sleep = (
     sp.sleep,
 )
 
+if not os.environ.get("fish_test_helper", ""):
+    import sys
+    sys.exit(127)
+
 # Launch fish_test_helper.
 expect_prompt()
 exe_path = os.environ.get("fish_test_helper")