fix(tests): explicitly state the shell to use

`tmux` uses the default login shell and thus tests might fail if this is
not bash (or something compatible). Explicitly stating which shell to
use circumvents issues arising from accidentally using another shell.

tests/workspace/test_builder.py

@@ -880,6 +880,8 @@ def test_find_current_active_pane(server, monkeypatch):
             textwrap.dedent(
                 """
 session_name: Should not execute
+options:
+  default-shell: /bin/bash
 windows:
 - panes:
   - shell_command: echo "___$((1 + 3))___"
@@ -893,6 +895,8 @@ def test_find_current_active_pane(server, monkeypatch):
             textwrap.dedent(
                 """
 session_name: Should not execute
+options:
+  default-shell: /bin/bash
 windows:
 - panes:
   - shell_command:
@@ -907,6 +911,8 @@ def test_find_current_active_pane(server, monkeypatch):
             textwrap.dedent(
                 """
 session_name: Should execute
+options:
+  default-shell: /bin/bash
 windows:
 - panes:
   - shell_command: echo "___$((1 + 3))___"
@@ -919,6 +925,8 @@ def test_find_current_active_pane(server, monkeypatch):
             textwrap.dedent(
                 """
 session_name: Should execute
+options:
+  default-shell: /bin/bash
 windows:
 - panes:
   - shell_command:
@@ -932,6 +940,8 @@ def test_find_current_active_pane(server, monkeypatch):
             textwrap.dedent(
                 """
 session_name: Should not execute
+options:
+  default-shell: /bin/bash
 windows:
 - panes:
   - shell_command:
@@ -946,6 +956,8 @@ def test_find_current_active_pane(server, monkeypatch):
             textwrap.dedent(
                 """
 session_name: Should not execute
+options:
+  default-shell: /bin/bash
 windows:
 - panes:
   - shell_command:
@@ -960,6 +972,8 @@ def test_find_current_active_pane(server, monkeypatch):
             textwrap.dedent(
                 """
 session_name: Should execute
+options:
+  default-shell: /bin/bash
 windows:
 - panes:
   - shell_command: echo "___$((1 + 3))___"
@@ -972,6 +986,8 @@ def test_find_current_active_pane(server, monkeypatch):
             textwrap.dedent(
                 """
 session_name: Should execute
+options:
+  default-shell: /bin/bash
 windows:
 - panes:
   - shell_command:
@@ -1033,6 +1049,8 @@ def fn():
             textwrap.dedent(
                 """
 session_name: Should not execute
+options:
+  default-shell: /bin/bash
 windows:
 - panes:
   - shell_command:
@@ -1049,6 +1067,8 @@ def fn():
             textwrap.dedent(
                 """
 session_name: Should not execute
+options:
+  default-shell: /bin/bash
 windows:
 - panes:
   - shell_command:
@@ -1065,6 +1085,8 @@ def fn():
             textwrap.dedent(
                 """
 session_name: Should not execute
+options:
+  default-shell: /bin/bash
 windows:
 - panes:
   - shell_command:
@@ -1079,6 +1101,8 @@ def fn():
             textwrap.dedent(
                 """
 session_name: Should not execute
+options:
+  default-shell: /bin/bash
 windows:
 - panes:
   - shell_command:
@@ -1093,6 +1117,8 @@ def fn():
             textwrap.dedent(
                 """
 session_name: Should not execute
+options:
+  default-shell: /bin/bash
 shell_command_before:
   - cmd: echo "sleeping before"
     sleep_before: .5