test: draft of sequencelink subtitle unit test

.gitignore

@@ -23,6 +23,3 @@ module.config.js
 
 # Local environment overrides
 .env.private
-
-# Installed Packages
-packages

src/course-home/outline-tab/OutlineTab.test.jsx

@@ -154,6 +154,30 @@ describe('Outline Tab', () => {
       const sequenceLink = screen.getByText('Title of Sequence');
       expect(sequenceLink.getAttribute('href')).toContain(`/course/${courseId}`);
     });
+
+    // TODO: insert unit test for if due date is null or not, what the subtitle
+    // If due date set, make sure subtitle says description AND due date
+    it('exam subsection description and due date display correctly', async () => {
+      const { courseBlocks } = await buildMinimalCourseBlocks(courseId, 'Title', { resumeBlock: true });
+      setTabData({
+        course_blocks: { blocks: courseBlocks.blocks },
+      });
+      await fetchAndRender();
+
+      // Look for a substring that says "(exam type) Exam due (datetime)""
+      expect(screen.getByText(/Exam due/)).toBeInDocument();
+    });
+
+    // If due date is NOT set, ONLY display description
+    it('exam subsection description and due date display correctly', async () => {
+      const { courseBlocks } = await buildMinimalCourseBlocks(courseId, 'Title', { resumeBlock: true });
+      setTabData({
+        course_blocks: { blocks: courseBlocks.blocks },
+      });
+      await fetchAndRender();
+      // Look for a substring that only says "(exam type) Exam"
+      expect(screen.getByText(/Exam$/)).toBeInDocument();
+    });
   });
 
   describe('Suggested schedule alerts', () => {

src/course-home/outline-tab/SequenceLink.jsx

@@ -41,7 +41,7 @@ const SequenceLink = ({
 
   const dueDateMessage = (
     <FormattedMessage
-      id="learning.outline.sequence-due"
+      id="learning.outline.sequence-due-date-set"
       defaultMessage="{description} due {assignmentDue}"
       description="Used below an assignment title"
       values={{
@@ -63,7 +63,7 @@ const SequenceLink = ({
 
   const noDueDateMessage = (
     <FormattedMessage
-      id="learning.outline.sequence-not-due"
+      id="learning.outline.sequence-due-date-not-set"
       defaultMessage="{description}"
       description="Used below an assignment title"
       values={{