added tests for waves 1 & 2

test/max_sub_array_test.rb

@@ -0,0 +1,70 @@
+require_relative "test_helper"
+
+xdescribe "max subarray" do
+  it "will work for [-2,1,-3,4,-1,2,1,-5,4]" do
+    # Arrange
+    input = [-2,1,-3,4,-1,2,1,-5,4]
+
+    # Act
+    answer = max_sub_array(input)
+
+    # Assert
+    expect(answer).must_equal 6
+  end
+
+  it "will work with a totally negative array" do
+    # Arrange
+    input = [-3, -4, -5, -6, -7]
+
+    # Act
+    answer = max_sub_array(input)
+
+    # Assert
+    expect(answer).must_equal(-3)
+  end
+
+  it "will work with a totally negative array with the largest element at the rear" do
+    # Arrange
+    input = [ -4, -5, -6, -7, -3]
+
+    # Act
+    answer = max_sub_array(input)
+
+    # Assert
+    expect(answer).must_equal(-3)
+  end
+
+  it "will work with a 1-element array" do
+    # Arrange
+    input = [3]
+
+    # Act
+    answer = max_sub_array(input)
+
+    # Assert
+    expect(answer).must_equal 3
+  end
+
+  it "will return nil for an empty array" do
+   # Arrange
+   input = []
+
+   # Act
+   answer = max_sub_array(input)
+
+   # Assert
+   expect(answer).must_be_nil
+  end
+
+  it "will work for [50, -50, 50]" do
+    # Arrange
+    input = [50, -50, 50]
+
+    # Act
+    answer = max_sub_array(input)
+
+    # Assert
+    expect(answer).must_equal 50
+  end
+
+end

test/newman_conway_test.rb

@@ -29,7 +29,7 @@
 
         # Act-Assert
         expect {
-          answer = newman_conway(input)
+          newman_conway(input)
         }.must_raise ArgumentError
 
 

test/test_helper.rb

@@ -6,4 +6,5 @@
 
 Minitest::Reporters.use! Minitest::Reporters::SpecReporter.new
 
-require_relative '../lib/newman_conway'
+require_relative "../lib/newman_conway"
+require_relative "../lib/max_subarray"