added unit 2

Author: eliastor

.ci/unit2/e1_main_test.go.tpl

@@ -0,0 +1,24 @@
+package main
+
+import (
+	"sort"
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+	"golang.org/x/tour/tree"
+)
+
+func TestMain(t *testing.T) {
+	assert.False(t, Same(tree.New(1), tree.New(2)))
+	assert.True(t, Same(tree.New(2), tree.New(2)))
+	ch := make(chan int)
+	nums := []int{}
+	tree2 := []int{2, 4, 6, 8, 10, 12, 14, 16, 18, 20}
+	go Walk(tree.New(2), ch)
+	for num := range ch {
+		t.Log(num)
+		nums = append(nums, num)
+	}
+	sort.Ints(nums)
+	assert.Equal(t, tree2, nums, "Tree walk function produces corrupted data for tree.New(2)")
+}

.ci/unit2/e2_main_test.go.tpl

@@ -0,0 +1,47 @@
+package main
+
+import (
+	"bytes"
+	"io"
+	"os"
+	"strings"
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func TestCrawl(t *testing.T) {
+
+}
+
+func Test_main(t *testing.T) {
+	old := os.Stdout
+	r, w, _ := os.Pipe()
+	os.Stdout = w
+	outCh := make(chan string)
+
+	go func() {
+		var buf bytes.Buffer
+		io.Copy(&buf, r)
+		outCh <- buf.String()
+	}()
+
+	Crawl("https://golang.org/", 4, fetcher)
+	w.Close()
+	os.Stdout = old
+	output := <-outCh
+	entries := []string{
+		`found: https://golang.org/ "The Go Programming Language"`,
+		`found: https://golang.org/pkg/ "Packages"`,
+		`found: https://golang.org/pkg/os/ "Package os"`,
+		`not found: https://golang.org/cmd/`,
+		`found: https://golang.org/pkg/fmt/ "Package fmt"`,
+	}
+
+	for _, entry := range entries {
+		assert.Contains(t, output, entry)
+		output = strings.Replace(output, entry, "", 1)
+		assert.NotContains(t, output, entry, "There must be no duplicates")
+	}
+
+}

.ci/unit2/exercise.test.sh

@@ -0,0 +1,12 @@
+#!/bin/bash
+
+cp unit2/e$1_main_test.go.tpl ../unit2/exercises/e$1/main_test.go
+
+cd ..
+
+go mod init course || true
+
+go get github.com/stretchr/testify/assert
+go get golang.org/x/tour/tree
+
+CGO_ENABLED=0 go test ./unit2/exercises/e$1/...

.github/workflows/unit2.yml

@@ -0,0 +1,23 @@
+name: Unit2 Test
+on: 
+  pull_request:
+    types: [opened, reopened, synchronize, edited]
+    paths: ["unit2/exercises/e**"]
+    # branches-ignore: ["master", "main"]
+jobs: 
+  test:
+    name: "Test exercises"
+    runs-on: "ubuntu-latest"
+    strategy:
+      matrix:
+        excercise: [0,1,2,3]
+    steps:
+      - uses: actions/setup-go@v3
+        with:
+          go-version: '>1.18.0'
+      - uses: actions/checkout@v3
+      - name: Exercise ${{ matrix.excercise }}
+        run: ./unit2/exercise.test.sh ${{ matrix.excercise }}
+        env:
+          CGO_ENABLED: 0
+        working-directory: .ci

.gitignore

@@ -0,0 +1,3 @@
+go.work
+**/__debug_bin
+

unit1/README.md

@@ -1,8 +1,12 @@
 # Unit 1: A tour of Go
-Please finish all material on https://go.dev/tour/ or https://go.dev/tour/list except "Generics" and "Concurrency"
+Please finish all materials on https://go.dev/tour/ or https://go.dev/tour/list except "Generics" and "Concurrency"
 
 Note: if you stuck with module try to read https://go.dev/blog/using-go-modules.
 
+## FAQ
+
+TBA
+
 ## Quiz
 
 #### Q1. How will you add the number 3 to the right side?