restore the discovery of tests cases by file system existence (#8983)

test/integration/connect/envoy/main_test.go

@@ -3,54 +3,19 @@
 package envoy
 
 import (
+	"io/ioutil"
 	"os"
 	"os/exec"
+	"sort"
+	"strings"
 	"testing"
+
+	"github.com/stretchr/testify/require"
 )
 
 func TestEnvoy(t *testing.T) {
-	var testcases = []string{
-		"case-badauthz",
-		"case-basic",
-		"case-centralconf",
-		"case-cfg-resolver-dc-failover-gateways-none",
-		"case-cfg-resolver-dc-failover-gateways-remote",
-		"case-cfg-resolver-defaultsubset",
-		"case-cfg-resolver-features",
-		"case-cfg-resolver-subset-onlypassing",
-		"case-cfg-resolver-subset-redirect",
-		"case-cfg-resolver-svc-failover",
-		"case-cfg-resolver-svc-redirect-http",
-		"case-cfg-resolver-svc-redirect-tcp",
-		"case-cfg-router-features",
-		"case-cfg-splitter-features",
-		"case-consul-exec",
-		"case-dogstatsd-udp",
-		"case-gateways-local",
-		"case-gateways-remote",
-		"case-gateway-without-services",
-		"case-grpc",
-		"case-http",
-		"case-http-badauthz",
-		"case-ingress-gateway-http",
-		"case-ingress-gateway-grpc",
-		"case-ingress-gateway-multiple-services",
-		"case-ingress-gateway-simple",
-		"case-ingress-gateway-tls",
-		"case-ingress-mesh-gateways-resolver",
-		"case-l7-intentions",
-		"case-multidc-rsa-ca",
-		"case-prometheus",
-		"case-statsd-udp",
-		"case-stats-proxy",
-		"case-terminating-gateway-hostnames",
-		"case-terminating-gateway-simple",
-		"case-terminating-gateway-subsets",
-		"case-terminating-gateway-without-services",
-		"case-upstream-config",
-		"case-wanfed-gw",
-		"case-zipkin",
-	}
+	testcases, err := discoverCases()
+	require.NoError(t, err)
 
 	runCmd(t, "suite_setup")
 	defer runCmd(t, "suite_teardown")
@@ -83,3 +48,26 @@ func runCmd(t *testing.T, c string, env ...string) {
 		t.Fatalf("command failed: %v", err)
 	}
 }
+
+// Discover the cases so we pick up both oss and ent copies.
+func discoverCases() ([]string, error) {
+	cwd, err := os.Getwd()
+	if err != nil {
+		return nil, err
+	}
+
+	dirs, err := ioutil.ReadDir(cwd)
+	if err != nil {
+		return nil, err
+	}
+
+	var out []string
+	for _, fi := range dirs {
+		if fi.IsDir() && strings.HasPrefix(fi.Name(), "case-") {
+			out = append(out, fi.Name())
+		}
+	}
+
+	sort.Strings(out)
+	return out, nil
+}