test: test pgcli on python3.9 (#1214)

* test: test pgcli on python3.9

* test on 3.9

* use 3.9-dev version from travis.

* try to fix pexpect EOF.

.travis.yml

@@ -8,6 +8,7 @@ python:
   - "3.6"
   - "3.7"
   - "3.8"
+  - "3.9-dev"
 
 before_install:
   - which python

setup.py

@@ -54,6 +54,7 @@ setup(
         "Programming Language :: Python :: 3.6",
         "Programming Language :: Python :: 3.7",
         "Programming Language :: Python :: 3.8",
+        "Programming Language :: Python :: 3.9",
         "Programming Language :: SQL",
         "Topic :: Database",
         "Topic :: Database :: Front-Ends",

tests/features/steps/basic_commands.py

@@ -68,7 +68,7 @@ def step_ctrl_d(context):
     context.cli.sendline("\pset pager off")
     wrappers.wait_prompt(context)
     context.cli.sendcontrol("d")
-    context.cli.expect_exact(pexpect.EOF, timeout=15)
+    context.cli.expect(pexpect.EOF, timeout=15)
     context.exit_sent = True
 
 

tox.ini

@@ -1,5 +1,5 @@
 [tox]
-envlist = py36, py37, py38
+envlist = py36, py37, py38, py39
 [testenv]
 deps = pytest>=2.7.0,<=3.0.7
     mock>=1.0.1