add unit test for gopalindrome

src/gopalindrome/main_test.go

+package main
+
+import (
+	"testing"
+)
+
+func TestIsPalindrome(t *testing.T) {
+	tests := []struct {
+		str      string
+		expected bool
+	}{
+		{
+			"Reit nie, ein Tier",
+			true,
+		},
+		{
+			"Kein Palidrom",
+			false,
+		},
+		{
+			"Abba",
+			true,
+		},
+	}
+	for _, tt := range tests {
+		t.Run(tt.str, func(t *testing.T) {
+			isPalindrome := isPalindrome(tt.str)
+			if isPalindrome != tt.expected {
+				t.Errorf(`IsPalindrome("%s") returns %v but must be %v`, tt.str, isPalindrome, tt.expected)
+			}
+		})
+	}
+}