Adds recovery test

recovery_test.go

@@ -0,0 +1,73 @@
+package narco
+
+import (
+	"bytes"
+	"log"
+	"net/http"
+	"net/http/httptest"
+	"strings"
+
+	. "gopkg.in/check.v1"
+)
+
+type RecovererSuite struct {
+	*NarcoSuite
+
+	recov  *Recoverer
+	buffer bytes.Buffer
+	rec    *httptest.ResponseRecorder
+	req    *http.Request
+	URL    string
+}
+
+var _ = Suite(&RecovererSuite{NarcoSuite: NewNarcoSuite()})
+
+func (s *RecovererSuite) SetUpSuite(c *C) {
+
+	s.recov = NewRecoverer()
+	s.recov.Logger = log.New(&s.buffer, "[narco] ", log.LstdFlags)
+	s.chain = s.chain.Append(s.recov.Wrap())
+
+	c.Assert(s.chain, NotNil)
+}
+
+func (s *RecovererSuite) SetUpTest(c *C) {
+	s.buffer.Reset()
+	s.rec = httptest.NewRecorder()
+	var err error
+	s.URL = "http://" + httptest.DefaultRemoteAddr + "/"
+	s.req, err = http.NewRequest("GET", s.URL, nil)
+	c.Assert(err, IsNil, Commentf("Unexpected error :%s", err))
+}
+
+func (s *RecovererSuite) TestRecoversFromPanic(c *C) {
+	// this should not panic
+	defer func() {
+		err := recover()
+		c.Assert(err, IsNil, Commentf("It should not have panic: %s", err))
+	}()
+
+	s.ServeHTTP(s.rec, s.req, func(rw http.ResponseWriter, req *http.Request) {
+		panic("foo")
+	})
+
+	lines := strings.Split(s.buffer.String(), "\n")
+
+	c.Assert(lines[0], Matches, `\[narco\] .* `+"PANIC: foo")
+	for i, l := range lines {
+		if i == 0 {
+			continue
+		}
+		matchString := "foo"
+		if i == 1 {
+			matchString = `goroutine [0-9]+ (\[running\])?:`
+		} else if i%2 == 0 {
+			//either function call, empty or created by line
+			matchString = `(.*\(.*\)|created by .*|)`
+		} else {
+			//function location, or <autogenerated>
+			matchString = `\t(.*\.go|\<autogenerated\>):[0-9]+ .*`
+		}
+		c.Assert(l, Matches, matchString, Commentf("On line %d", i))
+	}
+}