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Update insertion sort challenge (#129)

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Update constraints, test cases, code, and tests.
This commit is contained in:
Donne Martin 2016-12-11 07:42:54 -05:00 committed by GitHub
parent 2399eb60d3
commit 3cce1ffb51
3 changed files with 50 additions and 51 deletions
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33
sorting_searching/insertion_sort/insertion_sort_challenge.ipynb
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@ -37,6 +37,10 @@
"* Is a naiive solution sufficient?\n",
" * Yes\n",
"* Are duplicates allowed?\n",
" * Yes\n",
"* Can we assume the input is valid?\n",
" * No\n",
"* Can we assume this fits memory?\n",
" * Yes"
]
},
@ -46,7 +50,7 @@
"source": [
"## Test Cases\n",
"\n",
"* None -> None\n",
"* None -> Exception\n",
"* Empty input -> []\n",
"* One element -> [element]\n",
"* Two or more elements"
@ -76,9 +80,11 @@
},
"outputs": [],
"source": [
"def insertion_sort(data):\n",
" # TODO: Implement me\n",
" pass"
"class SelectionSort(object):\n",
"\n",
" def sort(data):\n",
" # TODO: Implement me\n",
" pass"
]
},
{
@ -101,31 +107,26 @@
"outputs": [],
"source": [
"# %load test_insertion_sort.py\n",
"from nose.tools import assert_equal\n",
"from nose.tools import assert_equal, assert_raises\n",
"\n",
"\n",
"class TestInsertionSort(object):\n",
"\n",
" def test_insertion_sort(self):\n",
" insertion_sort = InsertionSort()\n",
"\n",
" print('None input')\n",
" data = None\n",
" insertion_sort(data)\n",
" assert_equal(data, None)\n",
" assert_raises(TypeError, insertion_sort.sort, None)\n",
"\n",
" print('Empty input')\n",
" data = []\n",
" insertion_sort(data)\n",
" assert_equal(data, [])\n",
" assert_equal(insertion_sort.sort([]), [])\n",
"\n",
" print('One element')\n",
" data = [5]\n",
" insertion_sort(data)\n",
" assert_equal(data, [5])\n",
" assert_equal(insertion_sort.sort([5]), [5])\n",
"\n",
" print('Two or more elements')\n",
" data = [5, 1, 7, 2, 6, -3, 5, 7, -1]\n",
" insertion_sort(data)\n",
" assert_equal(data, sorted(data))\n",
" assert_equal(insertion_sort.sort(data), sorted(data))\n",
"\n",
" print('Success: test_insertion_sort')\n",
"\n",

49
sorting_searching/insertion_sort/insertion_sort_solution.ipynb
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@ -36,6 +36,10 @@
"* Is a naiive solution sufficient?\n",
" * Yes\n",
"* Are duplicates allowed?\n",
" * Yes\n",
"* Can we assume the input is valid?\n",
" * No\n",
"* Can we assume this fits memory?\n",
" * Yes"
]
},
@ -45,7 +49,7 @@
"source": [
"## Test Cases\n",
"\n",
"* None -> None\n",
"* None -> Exception\n",
"* Empty input -> []\n",
"* One element -> [element]\n",
"* Two or more elements"
@ -87,16 +91,20 @@
},
"outputs": [],
"source": [
"def insertion_sort(data):\n",
" if data is None or len(data) < 2:\n",
" return\n",
" for r in range(1, len(data)):\n",
" for l in range(r):\n",
" if data[l] > data[r]:\n",
" temp = data[r]\n",
" data[l+1:r+1] = data[l:r]\n",
" data[l] = temp\n",
" break"
"class InsertionSort(object):\n",
"\n",
" def sort(self, data):\n",
" if data is None:\n",
" raise TypeError('data cannot be None')\n",
" if len(data) < 2:\n",
" return data\n",
" for l in range(len(data)-1):\n",
" for r in range(l+1, len(data)):\n",
" if data[r] < data[l]:\n",
" temp = data[r]\n",
" data[l+1:r+1] = data[l:r]\n",
" data[l] = temp\n",
" return data"
]
},
{
@ -124,31 +132,26 @@
],
"source": [
"%%writefile test_insertion_sort.py\n",
"from nose.tools import assert_equal\n",
"from nose.tools import assert_equal, assert_raises\n",
"\n",
"\n",
"class TestInsertionSort(object):\n",
"\n",
" def test_insertion_sort(self):\n",
" insertion_sort = InsertionSort()\n",
"\n",
" print('None input')\n",
" data = None\n",
" insertion_sort(data)\n",
" assert_equal(data, None)\n",
" assert_raises(TypeError, insertion_sort.sort, None)\n",
"\n",
" print('Empty input')\n",
" data = []\n",
" insertion_sort(data)\n",
" assert_equal(data, [])\n",
" assert_equal(insertion_sort.sort([]), [])\n",
"\n",
" print('One element')\n",
" data = [5]\n",
" insertion_sort(data)\n",
" assert_equal(data, [5])\n",
" assert_equal(insertion_sort.sort([5]), [5])\n",
"\n",
" print('Two or more elements')\n",
" data = [5, 1, 7, 2, 6, -3, 5, 7, -1]\n",
" insertion_sort(data)\n",
" assert_equal(data, sorted(data))\n",
" assert_equal(insertion_sort.sort(data), sorted(data))\n",
"\n",
" print('Success: test_insertion_sort')\n",
"\n",

19
sorting_searching/insertion_sort/test_insertion_sort.py
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@ -1,28 +1,23 @@
from nose.tools import assert_equal
from nose.tools import assert_equal, assert_raises
class TestInsertionSort(object):
def test_insertion_sort(self):
insertion_sort = InsertionSort()
print('None input')
data = None
insertion_sort(data)
assert_equal(data, None)
assert_raises(TypeError, insertion_sort.sort, None)
print('Empty input')
data = []
insertion_sort(data)
assert_equal(data, [])
assert_equal(insertion_sort.sort([]), [])
print('One element')
data = [5]
insertion_sort(data)
assert_equal(data, [5])
assert_equal(insertion_sort.sort([5]), [5])
print('Two or more elements')
data = [5, 1, 7, 2, 6, -3, 5, 7, -1]
insertion_sort(data)
assert_equal(data, sorted(data))
assert_equal(insertion_sort.sort(data), sorted(data))
print('Success: test_insertion_sort')