Python: kindergarten_garden

python/kindergarten-garden/.exercism/metadata.json

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+{"track":"python","exercise":"kindergarten-garden","id":"fc0b130ce25d4814962aa1aca8c29ad7","url":"https://exercism.io/my/solutions/fc0b130ce25d4814962aa1aca8c29ad7","handle":"DmitryKokorin","is_requester":true,"auto_approve":false}

python/kindergarten-garden/README.md

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+# Kindergarten Garden
+
+Given a diagram, determine which plants each child in the kindergarten class is
+responsible for.
+
+The kindergarten class is learning about growing plants. The teacher
+thought it would be a good idea to give them actual seeds, plant them in
+actual dirt, and grow actual plants.
+
+They've chosen to grow grass, clover, radishes, and violets.
+
+To this end, the children have put little cups along the window sills, and
+planted one type of plant in each cup, choosing randomly from the available
+types of seeds.
+
+```text
+[window][window][window]
+........................ # each dot represents a cup
+........................
+```
+
+There are 12 children in the class:
+
+- Alice, Bob, Charlie, David,
+- Eve, Fred, Ginny, Harriet,
+- Ileana, Joseph, Kincaid, and Larry.
+
+Each child gets 4 cups, two on each row. Their teacher assigns cups to
+the children alphabetically by their names.
+
+The following diagram represents Alice's plants:
+
+```text
+[window][window][window]
+VR......................
+RG......................
+```
+
+In the first row, nearest the windows, she has a violet and a radish.  In the
+second row she has a radish and some grass.
+
+Your program will be given the plants from left-to-right starting with
+the row nearest the windows. From this, it should be able to determine
+which plants belong to each student.
+
+For example, if it's told that the garden looks like so:
+
+```text
+[window][window][window]
+VRCGVVRVCGGCCGVRGCVCGCGV
+VRCCCGCRRGVCGCRVVCVGCGCV
+```
+
+Then if asked for Alice's plants, it should provide:
+
+- Violets, radishes, violets, radishes
+
+While asking for Bob's plants would yield:
+
+- Clover, grass, clover, clover
+
+
+## Exception messages
+
+Sometimes it is necessary to raise an exception. When you do this, you should include a meaningful error message to
+indicate what the source of the error is. This makes your code more readable and helps significantly with debugging. Not
+every exercise will require you to raise an exception, but for those that do, the tests will only pass if you include
+a message.
+
+To raise a message with an exception, just write it as an argument to the exception type. For example, instead of
+`raise Exception`, you should write:
+
+```python
+raise Exception("Meaningful message indicating the source of the error")
+```
+
+## Running the tests
+
+To run the tests, run `pytest kindergarten_garden_test.py`
+
+Alternatively, you can tell Python to run the pytest module:
+`python -m pytest kindergarten_garden_test.py`
+
+### Common `pytest` options
+
+- `-v` : enable verbose output
+- `-x` : stop running tests on first failure
+- `--ff` : run failures from previous test before running other test cases
+
+For other options, see `python -m pytest -h`
+
+## Submitting Exercises
+
+Note that, when trying to submit an exercise, make sure the solution is in the `$EXERCISM_WORKSPACE/python/kindergarten-garden` directory.
+
+You can find your Exercism workspace by running `exercism debug` and looking for the line that starts with `Workspace`.
+
+For more detailed information about running tests, code style and linting,
+please see [Running the Tests](http://exercism.io/tracks/python/tests).
+
+## Source
+
+Random musings during airplane trip. [http://jumpstartlab.com](http://jumpstartlab.com)
+
+## Submitting Incomplete Solutions
+
+It's possible to submit an incomplete solution so you can see how others have completed the exercise.

python/kindergarten-garden/kindergarten_garden.py

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+from typing import List
+
+DEFAULT_STUDENTS = ['Alice', 'Bob', 'Charlie', 'David',
+                    'Eve', 'Fred', 'Ginny', 'Harriet',
+                    'Ileana', 'Joseph', 'Kincaid', 'Larry']
+
+PLANT_NAMES = {'V': 'Violets', 'R': 'Radishes', 'G': 'Grass', 'C': 'Clover'}
+
+
+class Garden:
+
+    def __init__(self, diagram: str, students: List[str] = DEFAULT_STUDENTS):
+        diagram = diagram.split()
+        self.plant_db = {}
+
+        for i, name in enumerate(sorted(students)):
+            self.plant_db[name] = ''.join([diagram[0][2*i:2*i + 2],
+                                           diagram[1][2*i:2*i + 2]])
+
+    def plants(self, name: str) -> List[str]:
+
+        if name not in self.plant_db.keys():
+            return []
+
+        return [PLANT_NAMES[ch] for ch in self.plant_db[name]]

python/kindergarten-garden/kindergarten_garden_test.py

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+import unittest
+
+from kindergarten_garden import Garden
+
+# Tests adapted from `problem-specifications//canonical-data.json`
+
+
+class KindergartenGardenTest(unittest.TestCase):
+    def test_partial_garden_garden_with_single_student(self):
+        garden = Garden("RC\nGG")
+        self.assertEqual(
+            garden.plants("Alice"), ["Radishes", "Clover", "Grass", "Grass"]
+        )
+
+    def test_partial_garden_different_garden_with_single_student(self):
+        garden = Garden("VC\nRC")
+        self.assertEqual(
+            garden.plants("Alice"), ["Violets", "Clover", "Radishes", "Clover"]
+        )
+
+    def test_partial_garden_garden_with_two_students(self):
+        garden = Garden("VVCG\nVVRC")
+        self.assertEqual(
+            garden.plants("Bob"), ["Clover", "Grass", "Radishes", "Clover"]
+        )
+
+    def test_partial_garden_second_student_s_garden(self):
+        garden = Garden("VVCCGG\nVVCCGG")
+        self.assertEqual(garden.plants("Bob"), ["Clover", "Clover", "Clover", "Clover"])
+
+    def test_partial_garden_third_student_s_garden(self):
+        garden = Garden("VVCCGG\nVVCCGG")
+        self.assertEqual(garden.plants("Charlie"), ["Grass", "Grass", "Grass", "Grass"])
+
+    def test_full_garden_first_student_s_garden(self):
+        garden = Garden("VRCGVVRVCGGCCGVRGCVCGCGV\nVRCCCGCRRGVCGCRVVCVGCGCV")
+        self.assertEqual(
+            garden.plants("Alice"), ["Violets", "Radishes", "Violets", "Radishes"]
+        )
+
+    def test_full_garden_second_student_s_garden(self):
+        garden = Garden("VRCGVVRVCGGCCGVRGCVCGCGV\nVRCCCGCRRGVCGCRVVCVGCGCV")
+        self.assertEqual(garden.plants("Bob"), ["Clover", "Grass", "Clover", "Clover"])
+
+    def test_full_garden_second_to_last_student_s_garden(self):
+        garden = Garden("VRCGVVRVCGGCCGVRGCVCGCGV\nVRCCCGCRRGVCGCRVVCVGCGCV")
+        self.assertEqual(
+            garden.plants("Kincaid"), ["Grass", "Clover", "Clover", "Grass"]
+        )
+
+    def test_full_garden_last_student_s_garden(self):
+        garden = Garden("VRCGVVRVCGGCCGVRGCVCGCGV\nVRCCCGCRRGVCGCRVVCVGCGCV")
+        self.assertEqual(
+            garden.plants("Larry"), ["Grass", "Violets", "Clover", "Violets"]
+        )
+
+    # Additional tests for this track
+
+    def test_students_are_unordered_first_student(self):
+        garden = Garden(
+            "VCRRGVRG\nRVGCCGCV", students=["Samantha", "Patricia", "Xander", "Roger"]
+        )
+        self.assertEqual(
+            garden.plants("Patricia"), ["Violets", "Clover", "Radishes", "Violets"]
+        )
+
+    def test_students_are_unordered_last_student(self):
+        garden = Garden(
+            "VCRRGVRG\nRVGCCGCV", students=["Samantha", "Patricia", "Xander", "Roger"]
+        )
+        self.assertEqual(
+            garden.plants("Xander"), ["Radishes", "Grass", "Clover", "Violets"]
+        )
+
+
+if __name__ == "__main__":
+    unittest.main()