toaster: Add tests for error message display on the build dashboard

Add tests to ensure that log messages with CRITICAL level and
with EXCEPTION level are shown in the main errors display
on the build dashboard.

[YOCTO #8320]

Signed-off-by: Elliot Smith <elliot.smith@intel.com>
Signed-off-by: Ed Bartosh <ed.bartosh@linux.intel.com>

lib/toaster/toastergui/tests.py

@@ -26,15 +26,15 @@
 from django.core.urlresolvers import reverse
 from django.utils import timezone
 
-from orm.models import Project, Release, BitbakeVersion, Package
+from orm.models import Project, Release, BitbakeVersion, Package, LogMessage
 from orm.models import ReleaseLayerSourcePriority, LayerSource, Layer, Build
 from orm.models import Layer_Version, Recipe, Machine, ProjectLayer, Target
 from orm.models import CustomImageRecipe, ProjectVariable
 from orm.models import Branch
 
 from toastergui.tables import SoftwareRecipesTable
-from bs4 import BeautifulSoup
 import json
+from bs4 import BeautifulSoup
 import re
 
 PROJECT_NAME = "test project"
@@ -832,3 +832,90 @@ def test_command_line_builds_in_progress(self):
         response = self.client.get(url, follow=True)
 
         self.assertEqual(response.status_code, 200)
+
+class BuildDashboardTests(TestCase):
+    """ Tests for the build dashboard /build/X """
+
+    def setUp(self):
+        bbv = BitbakeVersion.objects.create(name="bbv1", giturl="/tmp/",
+                                            branch="master", dirpath="")
+        release = Release.objects.create(name="release1",
+                                         bitbake_version=bbv)
+        project = Project.objects.create_project(name=PROJECT_NAME,
+                                                 release=release)
+
+        now = timezone.now()
+
+        self.build1 = Build.objects.create(project=project,
+                                           started_on=now,
+                                           completed_on=now)
+
+        # exception
+        msg1 = 'an exception was thrown'
+        self.exception_message = LogMessage.objects.create(
+            build=self.build1,
+            level=LogMessage.EXCEPTION,
+            message=msg1
+        )
+
+        # critical
+        msg2 = 'a critical error occurred'
+        self.critical_message = LogMessage.objects.create(
+            build=self.build1,
+            level=LogMessage.CRITICAL,
+            message=msg2
+        )
+
+    def _get_build_dashboard_errors(self):
+        """
+        Get a list of HTML fragments representing the errors on the
+        build dashboard
+        """
+        url = reverse('builddashboard', args=(self.build1.id,))
+        response = self.client.get(url)
+        soup = BeautifulSoup(response.content)
+        return soup.select('#errors div.alert-error')
+
+    def _check_for_log_message(self, log_message):
+        """
+        Check whether the LogMessage instance <log_message> is
+        represented as an HTML error in the build dashboard page
+        """
+        errors = self._get_build_dashboard_errors()
+        self.assertEqual(len(errors), 2)
+
+        expected_text = log_message.message
+        expected_id = str(log_message.id)
+
+        found = False
+        for error in errors:
+            error_text = error.find('pre').text
+            text_matches = (error_text == expected_text)
+
+            error_id = error['data-error']
+            id_matches = (error_id == expected_id)
+
+            if text_matches and id_matches:
+                found = True
+                break
+
+        template_vars = (expected_text, error_text,
+                         expected_id, error_id)
+        assertion_error_msg = 'exception not found as error: ' \
+            'expected text "%s" and got "%s"; ' \
+            'expected ID %s and got %s' % template_vars
+        self.assertTrue(found, assertion_error_msg)
+
+    def test_exceptions_show_as_errors(self):
+        """
+        LogMessages with level EXCEPTION should display in the errors
+        section of the page
+        """
+        self._check_for_log_message(self.exception_message)
+
+    def test_criticals_show_as_errors(self):
+        """
+        LogMessages with level CRITICAL should display in the errors
+        section of the page
+        """
+        self._check_for_log_message(self.critical_message)