chore: simplify tests with logtest (#3184)

core/logx/logtest/logtest_test.go

@@ -0,0 +1,22 @@
+package logtest
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+	"github.com/zeromicro/go-zero/core/logx"
+)
+
+func TestCollector(t *testing.T) {
+	const input = "hello"
+	c := NewCollector(t)
+	logx.Info(input)
+	assert.Equal(t, input, c.Content())
+	assert.Contains(t, c.String(), input)
+}
+
+func TestDiscard(t *testing.T) {
+	const input = "hello"
+	Discard(t)
+	logx.Info(input)
+}