PR: Fix showing Spyder-kernels message on kernel restarts (IPython console)

.github/scripts/install.sh

@@ -67,11 +67,11 @@ python -bb -X dev -W error -m build
 python -bb -X dev -W error -m pip install --no-deps dist/spyder*.whl
 
 # Create environment for Jedi environments tests
-mamba create -n jedi-test-env -q -y python=3.6 flask spyder-kernels
+mamba create -n jedi-test-env -q -y python=3.9 flask spyder-kernels
 mamba list -n jedi-test-env
 
 # Create environment to test conda activation before launching a spyder kernel
-mamba create -n spytest-ž -q -y python=3.6 spyder-kernels
+mamba create -n spytest-ž -q -y python=3.9 spyder-kernels
 mamba list -n spytest-ž
 
 # Install pyenv in Posix systems

spyder/plugins/ipythonconsole/tests/test_ipythonconsole.py

@@ -44,14 +44,15 @@
     running_in_ci, running_in_ci_with_conda)
 from spyder.config.gui import get_color_scheme
 from spyder.config.manager import CONF
+from spyder.config.utils import is_anaconda
 from spyder.py3compat import PY2, to_text_string
 from spyder.plugins.help.tests.test_plugin import check_text
 from spyder.plugins.help.utils.sphinxify import CSS_PATH
 from spyder.plugins.ipythonconsole.plugin import IPythonConsole
 from spyder.plugins.ipythonconsole.utils.style import create_style_class
 from spyder.plugins.ipythonconsole.widgets import ClientWidget
 from spyder.utils.programs import get_temp_dir
-from spyder.utils.conda import is_conda_env
+from spyder.utils.conda import get_conda_root_prefix
 
 
 # =============================================================================
@@ -78,8 +79,11 @@ def get_console_background_color(style_sheet):
     return background_color
 
 
-def get_conda_test_env(test_env_name=u'spytest-ž'):
-    """Return the full prefix path of the given `test_env_name`."""
+def get_conda_test_env(test_env_name='spytest-ž'):
+    """
+    Return the full prefix path of the given `test_env_name` and its
+    executable.
+    """
     if 'envs' in sys.prefix:
         root_prefix = os.path.dirname(os.path.dirname(sys.prefix))
     else:
@@ -92,7 +96,7 @@ def get_conda_test_env(test_env_name=u'spytest-ž'):
     else:
         test_env_executable = os.path.join(test_env_prefix, 'bin', 'python')
 
-    return test_env_executable
+    return (test_env_prefix, test_env_executable)
 
 
 # =============================================================================
@@ -196,7 +200,7 @@ def __getattr__(self, attr):
     if test_environment_interpreter:
         configuration.set('main_interpreter', 'default', False)
         configuration.set(
-            'main_interpreter', 'executable', get_conda_test_env())
+            'main_interpreter', 'executable', get_conda_test_env()[1])
     else:
         configuration.set('main_interpreter', 'default', True)
         configuration.set('main_interpreter', 'executable', '')
@@ -1657,6 +1661,8 @@ def test_calltip(ipyconsole, qtbot):
 @flaky(max_runs=3)
 @pytest.mark.order(1)
 @pytest.mark.test_environment_interpreter
+@pytest.mark.skipif(not is_anaconda(), reason='Only works with Anaconda')
+@pytest.mark.skipif(not running_in_ci(), reason='Only works on CIs')
 def test_conda_env_activation(ipyconsole, qtbot):
     """
     Test that the conda environment associated with an external interpreter
@@ -1668,12 +1674,12 @@ def test_conda_env_activation(ipyconsole, qtbot):
     # Get conda activation environment variable
     with qtbot.waitSignal(shell.executed):
         shell.execute(
-            "import os; conda_prefix = os.environ.get('CONDA_PREFIX')")
+            "import os; conda_prefix = os.environ.get('CONDA_PREFIX')"
+        )
 
-    expected_output = get_conda_test_env().replace('\\', '/')
-    if is_conda_env(expected_output):
-        output = shell.get_value('conda_prefix').replace('\\', '/')
-        assert expected_output == output
+    expected_output = get_conda_test_env()[0].replace('\\', '/')
+    output = shell.get_value('conda_prefix').replace('\\', '/')
+    assert expected_output == output
 
 
 @flaky(max_runs=3)
@@ -2438,8 +2444,7 @@ def test_run_script(ipyconsole, qtbot, tmp_path):
 
 
 @pytest.mark.skipif(
-    not sys.platform.startswith('linux'),
-    reason="Only runs on Linux")
+    not is_anaconda(), reason="Only works with Anaconda")
 def test_show_spyder_kernels_error_on_restart(ipyconsole, qtbot):
     """Test that we show Spyder-kernels error message on restarts."""
     # Wait until the window is fully up
@@ -2449,11 +2454,13 @@ def test_show_spyder_kernels_error_on_restart(ipyconsole, qtbot):
 
     # Point to an interpreter without Spyder-kernels
     ipyconsole.set_conf('default', False, section='main_interpreter')
-    ipyconsole.set_conf('executable', '/usr/bin/python3',
-                        section='main_interpreter')
+    if os.name == 'nt':
+        pyexec = osp.join(get_conda_root_prefix(), 'python.exe')
+    else:
+        pyexec = osp.join(get_conda_root_prefix(), 'bin', 'python')
+    ipyconsole.set_conf('executable', pyexec, section='main_interpreter')
 
     # Restart kernel
-    os.environ['SPY_TEST_SHOW_RESTART_MESSAGE'] = 'true'
     ipyconsole.restart_kernel()
 
     # Assert we show a kernel error
@@ -2467,7 +2474,7 @@ def test_show_spyder_kernels_error_on_restart(ipyconsole, qtbot):
         timeout=6000
     )
 
-    # To check kernel error visually
+    # To check the kernel error visually
     qtbot.wait(500)
 
     # Check kernel related actions are disabled

spyder/plugins/ipythonconsole/widgets/client.py

@@ -833,38 +833,32 @@ def has_spyder_kernels(self):
                 interpreter=pyexec,
                 version=SPYDER_KERNELS_VERSION)
 
-            if (
-                not has_spyder_kernels
-                # This is necessary to show this message for some tests and not
-                # do it for others.
-                and os.environ.get('SPY_TEST_SHOW_RESTART_MESSAGE')
-            ):
-                self.show_kernel_error(
-                    _("The Python environment or installation whose "
-                      "interpreter is located at"
-                      "<pre>"
-                      "    <tt>{0}</tt>"
-                      "</pre>"
-                      "doesn't have the <tt>spyder-kernels</tt> module or the "
-                      "right version of it installed ({1}). "
-                      "Without this module is not possible for Spyder to "
-                      "create a console for you.<br><br>"
-                      "You can install it by activating your environment (if "
-                      "necessary) and then running in a system terminal:"
-                      "<pre>"
-                      "    <tt>{2}</tt>"
-                      "</pre>"
-                      "or"
-                      "<pre>"
-                      "    <tt>{3}</tt>"
-                      "</pre>").format(
-                          pyexec,
-                          SPYDER_KERNELS_VERSION_MSG,
-                          SPYDER_KERNELS_CONDA,
-                          SPYDER_KERNELS_PIP
-                      )
+            msg = _(
+                "The Python environment or installation whose interpreter is "
+                "located at"
+                "<pre>"
+                "    <tt>{0}</tt>"
+                "</pre>"
+                "doesn't have the <tt>spyder-kernels</tt> module or the right "
+                "version of it installed ({1}). Without this module is not "
+                "possible for Spyder to create a console for you.<br><br>"
+                "You can install it by activating your environment first (if "
+                "necessary) and then running in a system terminal:"
+                "<pre>"
+                "    <tt>{2}</tt>"
+                "</pre>"
+                "or"
+                "<pre>"
+                "    <tt>{3}</tt>"
+                "</pre>").format(
+                    pyexec,
+                    SPYDER_KERNELS_VERSION_MSG,
+                    SPYDER_KERNELS_CONDA,
+                    SPYDER_KERNELS_PIP
                 )
 
+            if not has_spyder_kernels:
+                self.show_kernel_error(msg)
                 return False
             else:
                 return True

spyder/plugins/ipythonconsole/widgets/shell.py

@@ -264,8 +264,9 @@ def interrupt_kernel(self):
             super(ShellWidget, self).interrupt_kernel()
         else:
             self._append_html(
-                _("The kernel appears to be dead, so it can't be interrupted. "
-                  "Please open a new console to keep working.")
+                _("<br><br>The kernel appears to be dead, so it can't be "
+                  "interrupted. Please open a new console to keep "
+                  "working.<br>")
             )
 
     def execute(self, source=None, hidden=False, interactive=False):