good good study, day day up!

vendor/gopl.io/ch11/word1/word.go

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+// Copyright © 2016 Alan A. A. Donovan & Brian W. Kernighan.
+// License: https://creativecommons.org/licenses/by-nc-sa/4.0/
+
+// See page 303.
+//!+
+
+// Package word provides utilities for word games.
+package word
+
+// IsPalindrome reports whether s reads the same forward and backward.
+// (Our first attempt.)
+func IsPalindrome(s string) bool {
+	for i := range s {
+		if s[i] != s[len(s)-1-i] {
+			return false
+		}
+	}
+	return true
+}
+
+//!-

vendor/gopl.io/ch11/word1/word_test.go

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+// Copyright © 2016 Alan A. A. Donovan & Brian W. Kernighan.
+// License: https://creativecommons.org/licenses/by-nc-sa/4.0/
+
+//!+test
+package word
+
+import "testing"
+
+func TestPalindrome(t *testing.T) {
+	if !IsPalindrome("detartrated") {
+		t.Error(`IsPalindrome("detartrated") = false`)
+	}
+	if !IsPalindrome("kayak") {
+		t.Error(`IsPalindrome("kayak") = false`)
+	}
+}
+
+func TestNonPalindrome(t *testing.T) {
+	if IsPalindrome("palindrome") {
+		t.Error(`IsPalindrome("palindrome") = true`)
+	}
+}
+
+//!-test
+
+// The tests below are expected to fail.
+// See package gopl.io/ch11/word2 for the fix.
+
+//!+more
+func TestFrenchPalindrome(t *testing.T) {
+	if !IsPalindrome("été") {
+		t.Error(`IsPalindrome("été") = false`)
+	}
+}
+
+func TestCanalPalindrome(t *testing.T) {
+	input := "A man, a plan, a canal: Panama"
+	if !IsPalindrome(input) {
+		t.Errorf(`IsPalindrome(%q) = false`, input)
+	}
+}
+
+//!-more