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_student_ui.py

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+import datetime
+import re
+
+import pytest
+
+TODAY = datetime.date.today()
+
+
+@pytest.fixture
+def student(dev_client):
+    # Instructor launch first so the dev course and roster exist.
+    dev_client.post("/dev/launch/dev-instructor")
+    dev_client.post("/dev/launch/dev-student-1")
+    return dev_client
+
+
+def next_class_day_iso(page):
+    """First offered opt-out date from the student page's select."""
+    match = re.search(r'<option value="(\d{4}-\d{2}-\d{2})"', page)
+    return match.group(1)
+
+
+def test_student_home_shows_standing_and_histogram(student):
+    page = student.get("/me").get_data(as_text=True)
+    assert "answered <strong>0</strong>" in page
+    assert "class median is 0" in page
+    assert 'class="hist"' in page
+    assert "classmate" in page
+
+
+def test_optout_roundtrip(student):
+    page = student.get("/me").get_data(as_text=True)
+    day = next_class_day_iso(page)
+
+    resp = student.post("/me/optout", data={"date": day}, follow_redirects=True)
+    page = resp.get_data(as_text=True)
+    assert f"<td>{day}</td>" in page
+    assert "Withdraw" in page
+
+    # Duplicate submissions are ignored, not errors.
+    student.post("/me/optout", data={"date": day})
+    page = student.get("/me").get_data(as_text=True)
+    assert page.count(f"<td>{day}</td>") == 1
+
+    optout_id = re.search(r"/me/optout/(\d+)/delete", page).group(1)
+    resp = student.post(f"/me/optout/{optout_id}/delete", follow_redirects=True)
+    assert f"<td>{day}</td>" not in resp.get_data(as_text=True)
+
+
+def test_optout_rejects_non_class_day(student):
+    # Dev course meets Tue/Thu; find an upcoming Monday.
+    day = TODAY + datetime.timedelta(days=1)
+    while day.weekday() != 0:
+        day += datetime.timedelta(days=1)
+    resp = student.post("/me/optout", data={"date": day.isoformat()})
+    assert resp.status_code == 400
+
+
+def test_optout_rejects_past_date(student):
+    resp = student.post(
+        "/me/optout",
+        data={"date": (TODAY - datetime.timedelta(days=7)).isoformat()},
+    )
+    assert resp.status_code == 400
+
+
+def test_optout_affects_instructor_present_count(student):
+    page = student.get("/me").get_data(as_text=True)
+    day = next_class_day_iso(page)
+    student.post("/me/optout", data={"date": day})
+
+    student.post("/dev/launch/dev-instructor")
+    page = student.get(f"/instructor/live?date={day}").get_data(as_text=True)
+    assert "7 of 8 students available" in page
+    assert "(1 opted out)" in page
+
+
+def test_students_cannot_touch_others_optouts(student):
+    page = student.get("/me").get_data(as_text=True)
+    day = next_class_day_iso(page)
+    student.post("/me/optout", data={"date": day})
+    page = student.get("/me").get_data(as_text=True)
+    optout_id = re.search(r"/me/optout/(\d+)/delete", page).group(1)
+
+    student.post("/dev/launch/dev-student-2")
+    assert student.post(f"/me/optout/{optout_id}/delete").status_code == 404
+
+
+def test_assessment_visibility_setting(student):
+    # Record an answered call for dev-student-1 as the instructor.
+    student.post("/dev/launch/dev-instructor")
+    day = TODAY.isoformat()
+    # Draw live calls until dev-student-1 comes up, resolving each.
+    for _ in range(200):
+        student.post("/instructor/live/next", data={"date": day})
+        page = student.get(f"/instructor/live?date={day}").get_data(as_text=True)
+        call_id = re.search(r"/instructor/call/(\d+)/outcome", page).group(1)
+        target = "Ada Lovelace" in page
+        student.post(
+            f"/instructor/call/{call_id}/outcome", data={"action": "POOR"}
+        )
+        if target:
+            break
+
+    student.post("/dev/launch/dev-student-1")
+    page = student.get("/me").get_data(as_text=True)
+    assert "POOR" in page
+
+    # Turn visibility off; the outcome shows as just "answered".
+    student.post("/dev/launch/dev-instructor")
+    student.post(
+        "/instructor/settings",
+        data={"selection_mode": "weighted", "weight_factor": "2"},
+    )
+    student.post("/dev/launch/dev-student-1")
+    page = student.get("/me").get_data(as_text=True)
+    assert "POOR" not in page
+    assert "answered" in page