Add initial project files

pkg/deesee/codec_test.go

@@ -0,0 +1,36 @@
+package deesee
+
+import "testing"
+
+// TestEncrypt tests the Encrypt and Decrypt function.
+func TestCryptDecrypt(t *testing.T) {
+
+	// Case is a struct to store test cases.
+	type Case struct {
+		name string
+		key  int
+		A    string
+		B    string
+	}
+
+	// Run the test cases.
+	for _, tt := range []Case{
+		{"Test encrypt-decrypt: simple text",
+			5, "clark", "hqfwp"},
+		{"Test encrypt-decrypt: text with shifted  outbounds chars",
+			3, "cherry blossom", "fkhuub eorvvrp"},
+		{"Test encrypt-decrypt: text with shifted  outbounds chars and non-letter chars",
+			3, "cherry123 blossom!", "fkhuub123 eorvvrp!"},
+	} {
+		t.Run(tt.name, func(t *testing.T) {
+			enc := Encrypt(tt.A, tt.key)
+			if enc != tt.B {
+				t.Errorf("Encrypt() = %v, want %v", enc, tt.B)
+			}
+			dec := Decrypt(enc, tt.key)
+			if dec != tt.A {
+				t.Errorf("Decrypt() = %v, want %v", dec, tt.A)
+			}
+		})
+	}
+}