29-go-unit-testing first draft finished

29-go-unit-testing/.gitignore

@@ -0,0 +1,2 @@
+github.com/
+pkg/

29-go-unit-testing/src/problems/closestpair.go

@@ -0,0 +1,25 @@
+package problems
+
+import (
+	"math"
+	"sort"
+)
+
+type Pair struct {
+	First, Second int
+}
+
+func ClosestPair(numbers []int) Pair {
+	sort.Ints(numbers)
+	var pair Pair
+	var diff int = math.MaxInt32
+	for index := 0; index < len(numbers)-1; index++ {
+		cur := numbers[index]
+		next := numbers[index+1]
+		if next-cur < diff {
+			diff = next - cur
+			pair = Pair{cur, next}
+		}
+	}
+	return pair
+}

29-go-unit-testing/src/problems/closestpair_test.go

@@ -0,0 +1,32 @@
+package problems_test
+
+import (
+	"fmt"
+	"github.com/stretchr/testify/assert"
+	. "problems"
+	"testing"
+)
+
+func TestFindClosestPair(t *testing.T) {
+	numbers := []int{2, 10, 5, 6, 15}
+	pair := ClosestPair(numbers)
+	assert.Equal(t, 5, pair.First, fmt.Sprintf("first should be 5 but was %d", pair.First))
+	assert.Equal(t, 6, pair.Second, fmt.Sprintf("second should be 6 but was %d", pair.Second))
+}
+
+var closestPairTests = []struct {
+	in  []int
+	out Pair
+}{
+	{[]int{2, 10, 5, 6, 15}, Pair{5, 6}},
+	{[]int{2, 4, 5}, Pair{4, 5}},
+	{[]int{100, 5, 7, 99, 11}, Pair{99, 100}},
+}
+
+func TestClosestPair(t *testing.T) {
+	for _, tt := range closestPairTests {
+		pair := ClosestPair(tt.in)
+		assert.Equal(t, tt.out.First, pair.First)
+		assert.Equal(t, tt.out.Second, pair.Second)
+	}
+}

29-go-unit-testing/src/problems/equalornoequal_test.go

@@ -0,0 +1,26 @@
+package problems_test
+
+import (
+	"github.com/stretchr/testify/assert"
+	. "problems"
+	"testing"
+)
+
+func TestShouldBeTrueWhenThreeNumbersAreEqual(t *testing.T) {
+	isThreeNumbersEqual := EqualOrNotEqual(1, 1, 1)
+	if !isThreeNumbersEqual {
+		t.Error("Expected true, got ", isThreeNumbersEqual)
+	}
+}
+
+func TestShouldBeFalseWhenThreeNumbersAreNotEqual(t *testing.T) {
+	isThreeNumbersEqual := EqualOrNotEqual(1, 2, 3)
+	if isThreeNumbersEqual {
+		t.Error("Expected false, got", isThreeNumbersEqual)
+	}
+}
+
+func TestShouldAssertThatFunctionReturnsFalseWhenThreeNumbersAreNotEqual(t *testing.T) {
+	isThreeNumbersEqual := EqualOrNotEqual(1, 2, 3)
+	assert.False(t, isThreeNumbersEqual, "Expected false got true")
+}

29-go-unit-testing/src/problems/equalornotequal.go

@@ -0,0 +1,9 @@
+package problems
+
+func EqualOrNotEqual(first, second, third int) bool {
+	if first == second && second == third {
+		return true
+	} else {
+		return false
+	}
+}

29-golang-github-slacknotification/README.md

@@ -199,4 +199,4 @@ If all goes well, you will see the current GitHub Status being reported in your
 
 That's all for this week. Please provide your valuable feedback by adding a comment to [https://github.com/shekhargulati/52-technologies-in-2016/issues/40](https://github.com/shekhargulati/52-technologies-in-2016/issues/40).
 
-[![Analytics](https://ga-beacon.appspot.com/UA-59411913-2/shekhargulati/52-technologies-in-2016/29-golang-part2)](https://github.com/igrigorik/ga-beacon)
+[![Analytics](https://ga-beacon.appspot.com/UA-59411913-2/shekhargulati/52-technologies-in-2016/29-golang-romin-http)](https://github.com/igrigorik/ga-beacon)

README.md

@@ -75,6 +75,8 @@ Below is the list of technologies covered in this series:
 
 29. **[Week 29: July 15, 2016](./29-golang-github-slacknotification)** [Go Language - GitHub System Status API & Slack Notifications](./29-golang-github-slacknotification/README.md). In this blog, we are going to investigate a few more features of the language and combine that into a real life application where we can monitor the status of the GitHub System via its Status API and report its current status directly into a Slack Team page.
 
+30. **[Week 29: July 17, 2016](./29-go-unit-testing)** [Learn GoLang For Great Good Part 2: Unit Testing in Go](./29-go-unit-testing/README.md). This week we will take our Go knowledge to the next level by learning how to perform unit testing in Go. Unit testing has become an essential skill set for every programmer.
+
 -----------
 You can follow me on twitter at [https://twitter.com/shekhargulati](https://twitter.com/shekhargulati) or email me at <[email protected]>. Also, you can read my blogs at [http://shekhargulati.com/](http://shekhargulati.com/)