Phase 4: student views, opt-outs, and class schedule

Student page with a standing summary, a class-comparison histogram
(zero-dependency HTML/CSS) with a plain-language fewer/same/more
sentence, opt-out management with withdrawal of future dates, and a
call history that respects the per-course assessment-visibility
setting and never shows pending or skipped calls. Opt-outs validate
against a new per-course class-day schedule (range generator plus
individual add/remove for holidays), since Canvas has no structured
meeting-day data; courses without a schedule fall back to a free date
picker. Dev mode seeds a Tue/Thu pattern.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

tests/test_schedule_ui.py

@@ -0,0 +1,78 @@
+import datetime
+import re
+
+import pytest
+
+
+@pytest.fixture
+def instructor(dev_client):
+    dev_client.post("/dev/launch/dev-instructor")
+    return dev_client
+
+
+def test_generate_range_creates_weekday_dates(instructor):
+    # A fixed two-week window well in the future, Mon/Wed.
+    resp = instructor.post(
+        "/instructor/schedule/generate",
+        data={
+            "start": "2027-01-04",
+            "end": "2027-01-15",
+            "weekday": ["0", "2"],
+        },
+        follow_redirects=True,
+    )
+    page = resp.get_data(as_text=True)
+    for expected in ["Jan 4", "Jan 6", "Jan 11", "Jan 13"]:
+        assert expected in page
+    assert "Jan 5" not in page
+
+    # Re-generating the same range adds nothing new.
+    resp = instructor.post(
+        "/instructor/schedule/generate",
+        data={"start": "2027-01-04", "end": "2027-01-15", "weekday": ["0"]},
+        follow_redirects=True,
+    )
+    assert resp.get_data(as_text=True).count("Jan 4") == 1
+
+
+def test_generate_rejects_bad_input(instructor):
+    resp = instructor.post(
+        "/instructor/schedule/generate",
+        data={"start": "2027-01-15", "end": "2027-01-04", "weekday": ["0"]},
+    )
+    assert resp.status_code == 400
+    resp = instructor.post(
+        "/instructor/schedule/generate",
+        data={"start": "2027-01-04", "end": "2027-01-15"},
+    )
+    assert resp.status_code == 400
+
+
+def test_add_and_delete_single_day(instructor):
+    resp = instructor.post(
+        "/instructor/schedule/add",
+        data={"date": "2027-03-01"},
+        follow_redirects=True,
+    )
+    page = resp.get_data(as_text=True)
+    assert "Mar 1, 2027" in page
+
+    # Find the delete form id adjacent to the date row.
+    rows = re.findall(
+        r"<td[^>]*>\s*(\w{3} \w{3} \d+, \d{4})\s*</td>.*?/instructor/schedule/(\d+)/delete",
+        page,
+        re.S,
+    )
+    ids = {label: did for label, did in rows}
+    day_id = ids["Mon Mar 1, 2027"]
+
+    resp = instructor.post(
+        f"/instructor/schedule/{day_id}/delete", follow_redirects=True
+    )
+    assert "Mar 1, 2027" not in resp.get_data(as_text=True)
+
+
+def test_schedule_requires_instructor(dev_client):
+    dev_client.post("/dev/launch/dev-instructor")  # create course
+    dev_client.post("/dev/launch/dev-student-1")
+    assert dev_client.get("/instructor/schedule").status_code == 403