chore: add test ci

.github/workflows/test.yaml

@@ -0,0 +1,17 @@
+name: Unit Test
+
+on: [push,pull_request]
+
+jobs:
+  run-test:
+    runs-on:  ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3
+      - name: setup go env
+        uses: actions/setup-go@v4
+        with:
+          go-version: '1.19'
+      - name: run unit test
+        run:  go test -race -coverprofile=coverage -covermode=atomic -v ./...
+      - name: upload code coverage
+        uses: codecov/codecov-action@v3

codecov.yml

@@ -0,0 +1,20 @@
+codecov:
+  require_ci_to_pass: true
+
+coverage:
+  status:
+    project:
+      default:
+        target: 85%
+        threshold: 2%
+        base: auto
+        if_ci_failed: error
+        branches:
+          - 'master'
+
+comment:
+  layout: 'reach, diff, flags, files'
+  behavior: default
+  require_changes: false
+  branches:
+    - 'master'

decode_test.go

@@ -0,0 +1,59 @@
+package bencode
+
+import (
+	"reflect"
+	"testing"
+)
+
+func TestDecodeNumeric(t *testing.T) {
+	input := "i-42e"
+	expected := -42
+	decoded, _ := Decode([]byte(input))
+
+	value, _ := decoded.(int)
+	if value != expected {
+		t.Fatalf("%d != %d", value, expected)
+	}
+}
+
+func TestDecodeStrin(t *testing.T) {
+	input := "4:spam"
+	expected := "spam"
+	decoded, _ := Decode([]byte(input))
+	value, _ := decoded.([]byte)
+	if string(value) != expected {
+		t.Fatalf("%s != %s", string(value), expected)
+	}
+}
+
+func TestDecodeList(t *testing.T) {
+	input := "l4:spami42ee"
+	expected1 := "spam"
+	var expected2 int64 = 42
+	decoded, _ := Decode([]byte(input))
+	value, _ := decoded.([]interface{})
+	n1 := string(reflect.ValueOf(value[0]).Bytes())
+	n2 := reflect.ValueOf(value[1]).Int()
+	if n1 != expected1 {
+		t.Fatalf("%s != %s", n1, expected1)
+	}
+	if n2 != expected2 {
+		t.Fatalf("%d != %d", n2, expected2)
+	}
+}
+
+func TestDecodeDirectory(t *testing.T) {
+	input := "d3:bar4:spam3:fooi42ee"
+	decoded, _ := Decode([]byte(input))
+	value, _ := decoded.(map[string]interface{})
+	expected1 := "spam"
+	var expected2 int64 = 42
+	n1 := string(reflect.ValueOf(value["bar"]).Bytes())
+	n2 := reflect.ValueOf(value["foo"]).Int()
+	if n1 != expected1 {
+		t.Fatalf("%s != %s", n1, expected1)
+	}
+	if n2 != expected2 {
+		t.Fatalf("%d != %d", n2, expected2)
+	}
+}