dict: add simple search method

dictionary/dictionary.go

@@ -0,0 +1,9 @@
+package dictionary
+
+func Search(dictionary map[string]string, word string) string {
+	result, ok := dictionary[word]
+	if !ok {
+		return ""
+	}
+	return result
+}

dictionary/dictionary_test.go

@@ -0,0 +1,14 @@
+package dictionary
+
+import "testing"
+
+func TestSearch(t *testing.T) {
+	dictionary := map[string]string{"test": "this is just a test"}
+
+	got := Search(dictionary, "test")
+	want := "this is just a test"
+
+	if got != want {
+		t.Errorf("got %q want %q given %q", got, want, "test")
+	}
+}