add test for completion

test/test_completion.py

@@ -0,0 +1,63 @@
+# This file is part of arduino-cli.
+#
+# Copyright 2020 ARDUINO SA (http://www.arduino.cc/)
+#
+# This software is released under the GNU General Public License version 3,
+# which covers the main part of arduino-cli.
+# The terms of this license can be found at:
+# https://www.gnu.org/licenses/gpl-3.0.en.html
+#
+# You can be released from the requirements of the above licenses by purchasing
+# a commercial license. Buying such a license is mandatory if you want to modify or
+# otherwise use the software for commercial activities involving the Arduino
+# software without disclosing the source code of your own applications. To purchase
+# a commercial license, send an email to license@arduino.cc.
+
+import pytest
+
+def test_completion_no_args(run_command):
+    result = run_command("completion")
+    assert not result.ok
+    assert "Error: accepts 1 arg(s), received 0" in result.stderr
+    assert result.stdout == ""
+
+def test_completion_bash(run_command):
+    result = run_command("completion bash")
+    assert result.ok
+    assert result.stderr == ""
+    assert "_arduino-cli_root_command()" in result.stdout
+    assert "__start_arduino-cli()" in result.stdout
+
+def test_completion_zsh(run_command):
+    result = run_command("completion zsh")
+    assert result.ok
+    assert result.stderr == ""
+    assert "#compdef _arduino-cli arduino-cli" in result.stdout
+    assert "function _arduino-cli" in result.stdout
+
+def test_completion_fish(run_command):
+    result = run_command("completion fish")
+    assert result.ok
+    assert result.stderr == ""
+    assert "# fish completion for arduino-cli" in result.stdout
+    assert "function __arduino-cli_perform_completion" in result.stdout
+
+def test_completion_bash_no_desc(run_command):
+    result = run_command("completion bash --no-descriptions")
+    assert not result.ok
+    assert result.stdout == ""
+    assert "Error: command description is not supported by bash" in result.stderr
+
+def test_completion_zsh_no_desc(run_command):
+    result = run_command("completion zsh --no-descriptions")
+    assert not result.ok
+    assert result.stdout == ""
+    assert "Error: command description is not supported by zsh" in result.stderr
+
+def test_completion_fish_no_desc(run_command):
+    result = run_command("completion fish --no-descriptions")
+    assert result.ok
+    assert result.stderr == ""
+    assert "# fish completion for arduino-cli" in result.stdout
+    assert "function __arduino-cli_perform_completion" in result.stdout
+    assert "__completeNoDesc" in result.stdout