Revert "Commented doctests that were causing slowness at Travis. (#1039)"

This reverts commit f7ac8b5.

Author: cclauss

Diff for: .travis.yml

@@ -9,19 +9,31 @@ before_script:
   - flake8 . --count --select=E9,F63,F7,F82 --show-source --statistics
 script:
   - mypy --ignore-missing-imports .
-  - pytest . --doctest-modules
-      --ignore=data_structures/stacks/balanced_parentheses.py
-      --ignore=data_structures/stacks/infix_to_postfix_conversion.py
-      --ignore=file_transfer_protocol/ftp_send_receive.py
-      --ignore=file_transfer_protocol/ftp_client_server.py
-      --ignore=machine_learning/linear_regression.py
-      --ignore=machine_learning/perceptron.py
-      --ignore=machine_learning/random_forest_classification/random_forest_classification.py
-      --ignore=machine_learning/random_forest_regression/random_forest_regression.py
-      --ignore=maths/abs_min.py
-      --ignore=maths/binary_exponentiation.py
-      --ignore=maths/lucas_series.py
-      --ignore=maths/sieve_of_eratosthenes.py
+  #- IGNORE="data_structures,file_transfer_protocol,graphs,machine_learning,maths,neural_network,project_euler"
+  #- pytest . --doctest-modules --ignore=${IGNORE}
+  - pytest --doctest-modules
+      arithmetic_analysis
+      backtracking
+      boolean_algebra
+      ciphers
+      compression
+      conversions
+      digital_image_processing
+      divide_and_conquer
+      dynamic_programming
+      graphs
+      hashes
+      linear_algebra_python
+      matrix
+      networking_flow
+      neural_network
+      other
+      project_euler
+      searches
+      sorts
+      strings
+      traversals
+
 after_success:
   - python scripts/build_directory_md.py
   - cat DIRECTORY.md

Diff for: project_euler/problem_09/sol1.py

@@ -18,9 +18,8 @@ def solution():
      2. a**2 + b**2 = c**2
      3. a + b + c = 1000
     
-    # The code below has been commented due to slow execution affecting Travis.
-    # >>> solution()
-    # 31875000
+    >>> solution()
+    31875000
     """
     for a in range(300):
         for b in range(400):

Diff for: project_euler/problem_09/sol3.py

@@ -21,8 +21,8 @@ def solution():
      1. a**2 + b**2 = c**2
      2. a + b + c = 1000
 
-    #>>> solution()
-    #31875000
+    >>> solution()
+    31875000
     """
     return [
         a * b * c

Diff for: project_euler/problem_10/sol1.py

@@ -42,9 +42,8 @@ def sum_of_primes(n):
 def solution(n):
     """Returns the sum of all the primes below n.
     
-    # The code below has been commented due to slow execution affecting Travis.
-    # >>> solution(2000000)
-    # 142913828922
+    >>> solution(2000000)
+    142913828922
     >>> solution(1000)
     76127
     >>> solution(5000)

Diff for: project_euler/problem_10/sol2.py

@@ -31,9 +31,8 @@ def prime_generator():
 def solution(n):
     """Returns the sum of all the primes below n.
     
-    # The code below has been commented due to slow execution affecting Travis.
-    # >>> solution(2000000)
-    # 142913828922
+    >>> solution(2000000)
+    142913828922
     >>> solution(1000)
     76127
     >>> solution(5000)

Diff for: project_euler/problem_12/sol1.py

@@ -45,9 +45,8 @@ def solution():
     """Returns the value of the first triangle number to have over five hundred
     divisors.
     
-    # The code below has been commented due to slow execution affecting Travis.
-    # >>> solution()
-    # 76576500
+    >>> solution()
+    76576500
     """
     tNum = 1
     i = 1

Diff for: project_euler/problem_12/sol2.py

@@ -39,9 +39,8 @@ def solution():
     """Returns the value of the first triangle number to have over five hundred
     divisors.
     
-    # The code below has been commented due to slow execution affecting Travis.
-    # >>> solution()
-    # 76576500
+    >>> solution()
+    76576500
     """
     return next(
         i for i in triangle_number_generator() if count_divisors(i) > 500

Diff for: project_euler/problem_14/sol1.py

@@ -30,9 +30,8 @@ def solution(n):
     n → n/2 (n is even)
     n → 3n + 1 (n is odd)
  
-    # The code below has been commented due to slow execution affecting Travis.
-    # >>> solution(1000000)
-    # {'counter': 525, 'largest_number': 837799}
+    >>> solution(1000000)
+    {'counter': 525, 'largest_number': 837799}
     >>> solution(200)
     {'counter': 125, 'largest_number': 171}
     >>> solution(5000)

Diff for: project_euler/problem_14/sol2.py

@@ -47,9 +47,8 @@ def collatz_sequence(n):
 def solution(n):
     """Returns the number under n that generates the longest Collatz sequence.
 
-    # The code below has been commented due to slow execution affecting Travis.
-    # >>> solution(1000000)
-    # {'counter': 525, 'largest_number': 837799}
+    >>> solution(1000000)
+    {'counter': 525, 'largest_number': 837799}
     >>> solution(200)
     {'counter': 125, 'largest_number': 171}
     >>> solution(5000)