tests: add util tests

util/util_test.go

@@ -0,0 +1,31 @@
+package util
+
+import (
+	"bytes"
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func TestUtilContainsAny(t *testing.T) {
+	assert.True(t, ContainsAny("foo", []string{"foo", "bar"}))
+	assert.True(t, ContainsAny("bar", []string{"foo", "bar"}))
+	assert.False(t, ContainsAny("baz", []string{"foo", "bar"}))
+}
+
+func TestUtilMustWriteln(t *testing.T) {
+	var out bytes.Buffer
+	MustWriteln(&out, "foo")
+	assert.Equal(t, "foo\n", out.String())
+}
+
+func TestUtilMustWritef(t *testing.T) {
+	var out bytes.Buffer
+	MustWritef(&out, "foo %s", "bar")
+	assert.Equal(t, "foo bar", out.String())
+}
+
+func TestUtilColor(t *testing.T) {
+	assert.Equal(t, "\033[1;31mfoo\033[0m", Color("red", "foo"))
+	assert.Equal(t, "\033[1;37mfoo\033[0m", Color("white", "foo"))
+}