integration-tests: support out-of-tree tests

`go test` requires both config.go and the test files in the same
directory. For out-of-tree builds, config.go is normally not placed next
to the source files, so copy the tests to the build directory as a
workaround.

integration-tests/Makefile.am

@@ -21,11 +21,14 @@
 # OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
 # WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 
-EXTRA_DIST = \
+GO_FILES = \
 	nghttpx_http1_test.go \
 	nghttpx_http2_test.go \
 	nghttpx_spdy_test.go \
-	server_tester.go \
+	server_tester.go
+
+EXTRA_DIST = \
+	$(GO_FILES) \
 	server.key \
 	server.crt \
 	alt-server.key \
@@ -43,4 +46,5 @@ itprep-local:
 	go get -d -v golang.org/x/net/websocket
 
 it-local:
+	for i in $(GO_FILES); do [ -e $(builddir)/$$i ] || cp $(srcdir)/$$i $(builddir); done
 	sh setenv go test -v

integration-tests/config.go.in

@@ -2,4 +2,5 @@ package nghttp2
 
 const (
 	buildDir = "@top_builddir@"
+	sourceDir = "@top_srcdir@"
 )

integration-tests/server_tester.go

@@ -29,7 +29,8 @@ import (
 const (
 	serverBin  = buildDir + "/src/nghttpx"
 	serverPort = 3009
-	testDir    = buildDir + "/integration-tests"
+	testDir    = sourceDir + "/integration-tests"
+	logDir	   = buildDir + "/integration-tests"
 )
 
 func pair(name, value string) hpack.HeaderField {
@@ -124,7 +125,7 @@ func newServerTesterInternal(args []string, t *testing.T, handler http.Handler,
 	// "127.0.0.1,8080"
 	b := "-b" + strings.Replace(backendURL.Host, ":", ",", -1)
 	args = append(args, fmt.Sprintf("-f127.0.0.1,%v", serverPort), b,
-		"--errorlog-file="+testDir+"/log.txt", "-LINFO")
+		"--errorlog-file="+logDir+"/log.txt", "-LINFO")
 
 	authority := fmt.Sprintf("127.0.0.1:%v", serverPort)