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4b94493 | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 | use crate::domain::Lesson;
use super::vocabulary::{group_specs, subjects, teacher_index, LESSON_DURATION_MINUTES};
/// Builds lessons for all groups based on subject configuration.
///
/// For each group, creates lessons for all subjects with their allocated hours_per_week.
/// Each lesson is assigned to a group, a teacher, and a required room kind.
///
/// Teacher assignment: for a given subject, group 0 gets teachers[0], group 1 gets teachers[1],
/// etc. (wrapping around if there are more groups than teachers for that subject).
///
/// Total lessons = GROUP_COUNT * sum(hours_per_week for all subjects).
/// With 12 groups and current config: 12 * 25 = 300 lessons.
pub(super) fn build_lessons(group_count: usize) -> Vec<Lesson> {
let mut lessons = Vec::new();
let mut lesson_index = 0;
// For each group
for group_idx in 0..group_count {
let student_count = group_specs()[group_idx].student_count;
// For each subject, create hours_per_week lessons
for subject_config in subjects() {
// Determine which teacher to use for this subject and group
// Use round-robin: group_idx % number_of_teachers_for_subject
for lesson_num in 0..subject_config.hours_per_week {
let teacher_name = subject_config.teachers
[(group_idx + lesson_num) % subject_config.teachers.len()];
let teacher_idx = teacher_index(teacher_name);
lessons.push(Lesson::with_details(
lesson_index,
subject_config.name.to_string(),
group_idx,
student_count,
Some(teacher_idx),
LESSON_DURATION_MINUTES,
subject_config.room_kind,
));
lesson_index += 1;
}
}
}
lessons
}
#[cfg(test)]
mod tests {
use super::*;
#[test]
fn test_build_lessons() {
let lessons = build_lessons(12);
assert_eq!(lessons.len(), 300);
}
#[test]
fn test_all_groups_have_all_subjects() {
let lessons = build_lessons(12);
let subject_names: Vec<&str> = subjects().iter().map(|subject| subject.name).collect();
// Check each group has lessons for all subjects
for group_idx in 0..12 {
let group_lessons: Vec<_> = lessons
.iter()
.filter(|l| l.group_idx == group_idx)
.collect();
for subject_name in &subject_names {
let subject_lessons: Vec<_> = group_lessons
.iter()
.filter(|l| l.subject == *subject_name)
.collect();
let expected_count = subjects()
.iter()
.find(|subject| subject.name == *subject_name)
.unwrap()
.hours_per_week;
assert_eq!(
subject_lessons.len(),
expected_count,
"Group {} should have {} lessons for {}",
group_idx,
expected_count,
subject_name
);
}
}
}
#[test]
fn test_teacher_assignment() {
let lessons = build_lessons(12);
// The generated catalog has four English teachers, assigned round-robin.
let english_lessons: Vec<_> = lessons.iter().filter(|l| l.subject == "English").collect();
assert_eq!(english_lessons.len(), 48);
// Check teacher assignment pattern for English
for group_idx in 0..12 {
let group_english: Vec<_> = english_lessons
.iter()
.filter(|l| l.group_idx == group_idx)
.collect();
let expected_teacher_idx = teacher_index(
[
"Jane Austen",
"William Shakespeare",
"Chinua Achebe",
"Mary Shelley",
][group_idx % 4],
);
assert_eq!(group_english[0].teacher_idx, Some(expected_teacher_idx));
}
}
#[test]
fn test_lesson_duration() {
let lessons = build_lessons(12);
for lesson in &lessons {
assert_eq!(lesson.duration, LESSON_DURATION_MINUTES);
}
}
#[test]
fn test_subjects_are_classic_uk_school() {
let subject_names: Vec<&str> = subjects().iter().map(|subject| subject.name).collect();
assert!(subject_names.contains(&"Mathematics"));
assert!(subject_names.contains(&"Physics"));
assert!(subject_names.contains(&"Chemistry"));
assert!(subject_names.contains(&"Biology"));
assert!(subject_names.contains(&"Computer Science"));
assert!(subject_names.contains(&"English"));
assert!(subject_names.contains(&"History"));
assert!(subject_names.contains(&"Geography"));
assert!(subject_names.contains(&"French"));
assert!(subject_names.contains(&"German"));
assert_eq!(subject_names.len(), 10);
}
#[test]
fn test_total_lessons_per_group() {
let lessons = build_lessons(12);
// Each group should have 25 lessons (sum of hours_per_week)
for group_idx in 0..12 {
let group_lessons: Vec<_> = lessons
.iter()
.filter(|l| l.group_idx == group_idx)
.collect();
assert_eq!(group_lessons.len(), 25);
}
}
#[test]
fn test_all_lessons_have_teacher() {
let lessons = build_lessons(12);
for lesson in &lessons {
assert!(
lesson.teacher_idx.is_some(),
"Lesson {} has no teacher",
lesson.id
);
}
}
}
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