From e6adb03ab5d6658e538c9274d235c2c3f0471f5b Mon Sep 17 00:00:00 2001
From: openset <openset.wang@gmail.com>
Date: Sun, 1 Dec 2019 10:11:41 +0800
Subject: [PATCH] Add: Hexspeak

---
 problems/hexspeak/hexspeak.go      | 19 +++++++++++++++++++
 problems/hexspeak/hexspeak_test.go | 27 +++++++++++++++++++++++++++
 2 files changed, 46 insertions(+)
 create mode 100644 problems/hexspeak/hexspeak.go
 create mode 100644 problems/hexspeak/hexspeak_test.go

diff --git a/problems/hexspeak/hexspeak.go b/problems/hexspeak/hexspeak.go
new file mode 100644
index 000000000..9f81f7d0d
--- /dev/null
+++ b/problems/hexspeak/hexspeak.go
@@ -0,0 +1,19 @@
+package problem1271
+
+import (
+	"fmt"
+	"strconv"
+	"strings"
+)
+
+func toHexspeak(num string) string {
+	n, _ := strconv.Atoi(num)
+	hex := fmt.Sprintf("%X", n)
+	hex = strings.NewReplacer("0", "O", "1", "I").Replace(hex)
+	for _, v := range hex {
+		if v < 'A' {
+			return "ERROR"
+		}
+	}
+	return hex
+}
diff --git a/problems/hexspeak/hexspeak_test.go b/problems/hexspeak/hexspeak_test.go
new file mode 100644
index 000000000..07bf6f44c
--- /dev/null
+++ b/problems/hexspeak/hexspeak_test.go
@@ -0,0 +1,27 @@
+package problem1271
+
+import "testing"
+
+type testType struct {
+	in   string
+	want string
+}
+
+func TestToHexspeak(t *testing.T) {
+	tests := [...]testType{
+		{
+			in:   "257",
+			want: "IOI",
+		},
+		{
+			in:   "3",
+			want: "ERROR",
+		},
+	}
+	for _, tt := range tests {
+		got := toHexspeak(tt.in)
+		if got != tt.want {
+			t.Fatalf("in: %v, got: %v, want: %v", tt.in, got, tt.want)
+		}
+	}
+}