Add grade-school (#310)

Author: BNAndras

config.json

@@ -575,6 +575,14 @@
         "prerequisites": [],
         "difficulty": 4
       },
+      {
+        "slug": "grade-school",
+        "name": "Grade School",
+        "uuid": "17234e84-78aa-4afc-9bad-aa1ca0483d28",
+        "practices": [],
+        "prerequisites": [],
+        "difficulty": 5
+      },
       {
         "slug": "hamming",
         "name": "Hamming",

exercises/practice/grade-school/.docs/instructions.md

@@ -0,0 +1,21 @@
+# Instructions
+
+Given students' names along with the grade that they are in, create a roster for the school.
+
+In the end, you should be able to:
+
+- Add a student's name to the roster for a grade
+  - "Add Jim to grade 2."
+  - "OK."
+- Get a list of all students enrolled in a grade
+  - "Which students are in grade 2?"
+  - "We've only got Jim just now."
+- Get a sorted list of all students in all grades.
+  Grades should sort as 1, 2, 3, etc., and students within a grade should be sorted alphabetically by name.
+  - "Who all is enrolled in school right now?"
+  - "Let me think.
+    We have Anna, Barb, and Charlie in grade 1, Alex, Peter, and Zoe in grade 2 and Jim in grade 5.
+    So the answer is: Anna, Barb, Charlie, Alex, Peter, Zoe and Jim"
+
+Note that all our students only have one name (It's a small town, what do you want?) and each student cannot be added more than once to a grade or the roster.
+In fact, when a test attempts to add the same student more than once, your implementation should indicate that this is incorrect.

exercises/practice/grade-school/.meta/config.json

@@ -0,0 +1,18 @@
+{
+  "authors": [
+    "BNAndras"
+  ],
+  "files": {
+    "solution": [
+      "grade_school.vim"
+    ],
+    "test": [
+      "grade_school.vader"
+    ],
+    "example": [
+      ".meta/example.vim"
+    ]
+  },
+  "blurb": "Given students' names along with the grade that they are in, create a roster for the school.",
+  "source": "A pairing session with Phil Battos at gSchool"
+}

exercises/practice/grade-school/.meta/example.vim

@@ -0,0 +1,51 @@
+function! GradeSchool() abort
+  return {
+    \ 'values': {},
+    \ 'Add': function('s:Add'),
+    \ 'Grade': function('s:Grade'),
+    \ 'Roster': function('s:Roster')}
+endfunction
+
+function! s:Add(student, grade) abort dict
+  if has_key(self.values, a:student)
+    return v:false
+  endif
+
+  let self.values[a:student] = a:grade
+  return v:true
+endfunction
+
+function! s:Grade(grade) abort dict
+  let l:result = []
+
+  for l:item in items(self.values)
+    if l:item[1] == a:grade
+      call add(l:result, l:item[0])
+    endif
+  endfor
+
+  let l:sorted = sort(l:result)
+  return l:sorted
+endfunction
+
+function! s:Roster() abort dict
+  let l:result = []
+
+  let l:grades = sort(s:Unique(values(self.values)))
+  for l:grade in l:grades
+    call extend(l:result, self.Grade(l:grade))
+  endfor
+
+  return l:result
+endfunction
+
+function s:Unique(list) abort
+  let l:result = []
+  for l:item in a:list
+    if index(l:result, l:item) == -1
+      call add(l:result, l:item)
+    endif
+  endfor
+
+  return l:result
+endfunction

exercises/practice/grade-school/.meta/tests.toml

@@ -0,0 +1,86 @@
+# This is an auto-generated file.
+#
+# Regenerating this file via `configlet sync` will:
+# - Recreate every `description` key/value pair
+# - Recreate every `reimplements` key/value pair, where they exist in problem-specifications
+# - Remove any `include = true` key/value pair (an omitted `include` key implies inclusion)
+# - Preserve any other key/value pair
+#
+# As user-added comments (using the # character) will be removed when this file
+# is regenerated, comments can be added via a `comment` key.
+
+[a3f0fb58-f240-4723-8ddc-e644666b85cc]
+description = "Roster is empty when no student is added"
+
+[9337267f-7793-4b90-9b4a-8e3978408824]
+description = "Add a student"
+
+[6d0a30e4-1b4e-472e-8e20-c41702125667]
+description = "Student is added to the roster"
+
+[73c3ca75-0c16-40d7-82f5-ed8fe17a8e4a]
+description = "Adding multiple students in the same grade in the roster"
+
+[233be705-dd58-4968-889d-fb3c7954c9cc]
+description = "Multiple students in the same grade are added to the roster"
+
+[87c871c1-6bde-4413-9c44-73d59a259d83]
+description = "Cannot add student to same grade in the roster more than once"
+
+[c125dab7-2a53-492f-a99a-56ad511940d8]
+description = "A student can't be in two different grades"
+include = false
+
+[a0c7b9b8-0e89-47f8-8b4a-c50f885e79d1]
+description = "A student can only be added to the same grade in the roster once"
+include = false
+reimplements = "c125dab7-2a53-492f-a99a-56ad511940d8"
+
+[d7982c4f-1602-49f6-a651-620f2614243a]
+description = "Student not added to same grade in the roster more than once"
+reimplements = "a0c7b9b8-0e89-47f8-8b4a-c50f885e79d1"
+
+[e70d5d8f-43a9-41fd-94a4-1ea0fa338056]
+description = "Adding students in multiple grades"
+
+[75a51579-d1d7-407c-a2f8-2166e984e8ab]
+description = "Students in multiple grades are added to the roster"
+
+[7df542f1-57ce-433c-b249-ff77028ec479]
+description = "Cannot add same student to multiple grades in the roster"
+
+[6a03b61e-1211-4783-a3cc-fc7f773fba3f]
+description = "A student cannot be added to more than one grade in the sorted roster"
+include = false
+reimplements = "c125dab7-2a53-492f-a99a-56ad511940d8"
+
+[c7ec1c5e-9ab7-4d3b-be5c-29f2f7a237c5]
+description = "Student not added to multiple grades in the roster"
+reimplements = "6a03b61e-1211-4783-a3cc-fc7f773fba3f"
+
+[d9af4f19-1ba1-48e7-94d0-dabda4e5aba6]
+description = "Students are sorted by grades in the roster"
+
+[d9fb5bea-f5aa-4524-9d61-c158d8906807]
+description = "Students are sorted by name in the roster"
+
+[180a8ff9-5b94-43fc-9db1-d46b4a8c93b6]
+description = "Students are sorted by grades and then by name in the roster"
+
+[5e67aa3c-a3c6-4407-a183-d8fe59cd1630]
+description = "Grade is empty if no students in the roster"
+
+[1e0cf06b-26e0-4526-af2d-a2e2df6a51d6]
+description = "Grade is empty if no students in that grade"
+
+[2bfc697c-adf2-4b65-8d0f-c46e085f796e]
+description = "Student not added to same grade more than once"
+
+[66c8e141-68ab-4a04-a15a-c28bc07fe6b9]
+description = "Student not added to multiple grades"
+
+[c9c1fc2f-42e0-4d2c-b361-99271f03eda7]
+description = "Student not added to other grade for multiple grades"
+
+[1bfbcef1-e4a3-49e8-8d22-f6f9f386187e]
+description = "Students are sorted by name in a grade"

exercises/practice/grade-school/grade_school.vader

@@ -0,0 +1,143 @@
+Before:
+  let g:school = GradeSchool()
+
+Execute (Roster is empty when no student is added):
+  let g:expected = []
+  AssertEqual g:expected, g:school.Roster()
+
+Execute (Add a student):
+  Assert g:school.Add('Aimee', 2)
+
+Execute (Student is added to the roster):
+  call g:school.Add('Aimee', 2)
+  AssertEqual ['Aimee'], g:school.Roster()
+
+Execute (Adding multiple students in the same grade in the roster):
+  Assert g:school.Add('Blair', 2)
+  Assert g:school.Add('James', 2)
+  Assert g:school.Add('Paul', 2)
+
+Execute (Multiple students in the same grade are added to the roster):
+  call g:school.Add('Blair', 2)
+  call g:school.Add('James', 2)
+  call g:school.Add('Paul', 2)
+
+  let g:expected = ['Blair', 'James', 'Paul']
+  AssertEqual g:expected, g:school.Roster()
+
+Execute (Cannot add student to same grade in the roster more than once):
+  call g:school.Add('Blair', 2)
+  Assert g:school.Add('James', 2)
+  Assert !g:school.Add('James', 2)
+  call g:school.Add('Paul', 2)
+
+Execute (Student not added to same grade in the roster more than once):
+  call g:school.Add('Blair', 2)
+  call g:school.Add('James', 2)
+  call g:school.Add('James', 2)
+  call g:school.Add('Paul', 2)
+
+  let g:expected = ['Blair', 'James', 'Paul']
+  AssertEqual g:expected, g:school.Roster()
+
+Execute (Adding students in multiple grades):
+  Assert g:school.Add('Chelsea', 3)
+  Assert g:school.Add('Logan', 7)
+
+Execute (Students in multiple grades are added to the roster):
+  call g:school.Add('Chelsea', 3)
+  call g:school.Add('Logan', 7)
+
+  let g:expected = ['Chelsea', 'Logan']
+  AssertEqual g:expected, g:school.Roster()
+
+Execute (Cannot add same student to multiple grades in the roster):
+  let g:students = [['Blair', 2], ['James', 2], ['James', 3], ['Paul', 3]]
+  call g:school.Add('Blair', 2)
+  Assert g:school.Add('James', 2)
+  Assert !g:school.Add('James', 3)
+  call g:school.Add('Paul', 3)
+
+Execute (Student not added to multiple grades in the roster):
+  call g:school.Add('Blair', 2)
+  call g:school.Add('James', 2)
+  call g:school.Add('James', 3)
+  call g:school.Add('Paul', 3)
+
+  let g:expected = ['Blair', 'James', 'Paul']
+  AssertEqual g:expected, g:school.Roster()
+
+Execute (Students are sorted by grades in the roster):
+  call g:school.Add('Jim', 3)
+  call g:school.Add('Peter', 2)
+  call g:school.Add('Anna', 1)
+
+  let g:expected = ['Anna', 'Peter', 'Jim']
+  AssertEqual g:expected, g:school.Roster()
+
+Execute (Students are sorted by name in the roster):
+  call g:school.Add('Peter', 2)
+  call g:school.Add('Zoe', 2)
+  call g:school.Add('Alex', 2)
+
+  let g:expected = ['Alex', 'Peter', 'Zoe']
+  AssertEqual g:expected, g:school.Roster()
+
+Execute (Students are sorted by grades and then by name in the roster):
+  call g:school.Add('Peter', 2)
+  call g:school.Add('Anna', 1)
+  call g:school.Add('Barb', 1)
+  call g:school.Add('Zoe', 2)
+  call g:school.Add('Alex', 2)
+  call g:school.Add('Jim', 3)
+  call g:school.Add('Charlie', 1)
+
+  let g:expected = ['Anna', 'Barb', 'Charlie', 'Alex', 'Peter', 'Zoe', 'Jim']
+  AssertEqual g:expected, g:school.Roster()
+
+Execute (Grade is empty if no students in the roster):
+  AssertEqual [], g:school.Grade(1)
+
+Execute (Grade is empty if no students in that grade):
+  call g:school.Add('Peter', 2)
+  call g:school.Add('Zoe', 2)
+  call g:school.Add('Alex', 2)
+  call g:school.Add('Jim', 3)
+
+  let g:expected = []
+  AssertEqual expected, g:school.Grade(1)
+
+Execute (Student not added to same grade more than once):
+  call g:school.Add('Blair', 2)
+  call g:school.Add('James', 2)
+  call g:school.Add('James', 2)
+  call g:school.Add('Paul', 2)
+
+  let g:expected = ['Blair', 'James', 'Paul']
+  AssertEqual expected, g:school.Grade(2)
+
+Execute (Student not added to multiple grades):
+  call g:school.Add('Blair', 2)
+  call g:school.Add('James', 2)
+  call g:school.Add('James', 3)
+  call g:school.Add('Paul', 3)
+
+  let g:expected = ['Blair', 'James']
+  AssertEqual expected, g:school.Grade(2)
+
+Execute (Student not added to other grade for multiple grades):
+  call g:school.Add('Blair', 2)
+  call g:school.Add('James', 2)
+  call g:school.Add('James', 3)
+  call g:school.Add('Paul', 3)
+
+  let g:expected = ['Paul']
+  AssertEqual expected, g:school.Grade(3)
+
+Execute (Students are sorted by name in a grade):
+  call g:school.Add('Franklin', 5)
+  call g:school.Add('Bradley', 5)
+  call g:school.Add('Jeff', 1)
+
+  let g:expected = ['Bradley', 'Franklin']
+  AssertEqual expected, g:school.Grade(5)

exercises/practice/grade-school/grade_school.vim

@@ -0,0 +1,7 @@
+"
+" Returns an object representing a school roster, which can add a student, 
+" list students in a grade, or list all students
+"
+function! GradeSchool() abort
+  " your implementation goes here
+endfunction