Merge branch '36-foolsday' into 'master'

Resolve "foolsday"

Closes #36

See merge request slon/shad-go-private!48

.deadlines.yml

@@ -1,3 +1,14 @@
+- group: April Fools' Day
+  start:    01-04-2021 00:00
+  deadline: 01-04-2021 23:59
+  tasks:
+    - task: foolsday1
+      score: 50
+    - task: foolsday2
+      score: 50
+    - task: foolsday3
+      score: 50
+
 - group:    HTTP
   start:    25-03-2021 18:00
   deadline: 04-04-2021 23:59

foolsday1/README.md

@@ -0,0 +1,5 @@
+# foolsday1
+
+В этой задаче нужно прислать в телеграм чат курса уникальный и субъективно смешной мем!
+
+После этого сдать флаг `FLAG{foolsday1:april-first:229383d33b0798ef58a74040fc618baa}`.

foolsday2/README.md

@@ -0,0 +1,3 @@
+# foolsday2
+
+Чур без спойлеров!

foolsday2/flag_test.go

@@ -0,0 +1,11 @@
+// +build private
+
+package main
+
+import "testing"
+
+const flag = "FLAG{foolsday2:hidden-gem:07a5e6469f2178616cba4e9a0410e050}"
+
+func TestHiddenGem(t *testing.T) {
+	t.Logf("Here's your flag: %s", flag)
+}

foolsday3/README.md

@@ -0,0 +1,3 @@
+# foolsday3
+
+Если вы совсем застряли: [подсказка](https://bit.ly/3wipKMz).

foolsday3/lambda.go

@@ -0,0 +1,9 @@
+// +build !solution
+
+package foolsday3
+
+import "context"
+
+func lambda(ctx context.Context) interface{} {
+	return nil
+}

foolsday3/lambda_test.go

@@ -0,0 +1,33 @@
+// +build !race
+
+package foolsday3
+
+import (
+	"context"
+	"testing"
+	"time"
+)
+
+func TestLambda(t *testing.T) {
+	ctx, cancel := context.WithTimeout(context.Background(), time.Second*10)
+	defer cancel()
+
+	var doNotPrint bool
+	var validateLambdaFunc = func(end time.Time) bool {
+		return time.Now() == end
+	}
+	result := lambda(ctx)
+	end := time.Now()
+	if validateLambdaFunc(end) == true {
+		t.Logf("[%s] Great! Your function is very fast!", end.Format("15:04:05.999999"))
+		if doNotPrint != true {
+			t.Log("Congrats!")
+			return
+		}
+		t.Log(result)
+		t.FailNow()
+	}
+	t.Logf("[%s] result of your slow function:", end.Format("15:04:05.999999"))
+	t.Log(result)
+	t.FailNow()
+}

foolsday3/solution.go

@@ -0,0 +1,17 @@
+// +build solution
+
+package foolsday3
+
+import (
+	"context"
+	"time"
+)
+
+var true = false
+
+func lambda(ctx context.Context) interface{} {
+	time.AfterFunc(time.Nanosecond, func() {
+		true = int(0) == 0
+	})
+	return nil
+}