i forgot something

util.go

@@ -0,0 +1,24 @@
+package parser
+
+import (
+	"fmt"
+	"regexp"
+	"strings"
+)
+
+func containsWord(s, substr string) (match bool) {
+	var err error
+	for _, field := range strings.Fields(s) {
+		match, err = regexp.MatchString(
+			fmt.Sprintf("^%s$", substr),
+			field,
+		)
+		if err != nil {
+			println(err)
+		}
+		if match {
+			return
+		}
+	}
+	return
+}

util_test.go

@@ -0,0 +1,42 @@
+package parser
+
+import "testing"
+
+func TestContainsWord(t *testing.T) {
+	tests := []struct {
+		input []string
+		want  bool
+	}{
+		{
+			[]string{
+				"card-header card",
+				"card",
+			},
+			true,
+		},
+		{
+			[]string{
+				"card-body card-header",
+				"card-header",
+			},
+			true,
+		},
+		{
+			[]string{
+				"card-body card-header",
+				"card",
+			},
+			false,
+		},
+	}
+
+	for _, test := range tests {
+		got := containsWord(
+			test.input[0],
+			test.input[1],
+		)
+		if got != test.want {
+			t.Errorf("got: %t, want %t", got, test.want)
+		}
+	}
+}