Dynamic Configuration Refactoring

old/middlewares/tracing/forwarder_test.go

@@ -0,0 +1,93 @@
+package tracing
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func TestTracingNewForwarderMiddleware(t *testing.T) {
+	testCases := []struct {
+		desc     string
+		tracer   *Tracing
+		frontend string
+		backend  string
+		expected *forwarderMiddleware
+	}{
+		{
+			desc: "Simple Forward Tracer without truncation and hashing",
+			tracer: &Tracing{
+				SpanNameLimit: 101,
+			},
+			frontend: "some-service.domain.tld",
+			backend:  "some-service.domain.tld",
+			expected: &forwarderMiddleware{
+				Tracing: &Tracing{
+					SpanNameLimit: 101,
+				},
+				frontend: "some-service.domain.tld",
+				backend:  "some-service.domain.tld",
+				opName:   "forward some-service.domain.tld/some-service.domain.tld",
+			},
+		}, {
+			desc: "Simple Forward Tracer with truncation and hashing",
+			tracer: &Tracing{
+				SpanNameLimit: 101,
+			},
+			frontend: "some-service-100.slug.namespace.environment.domain.tld",
+			backend:  "some-service-100.slug.namespace.environment.domain.tld",
+			expected: &forwarderMiddleware{
+				Tracing: &Tracing{
+					SpanNameLimit: 101,
+				},
+				frontend: "some-service-100.slug.namespace.environment.domain.tld",
+				backend:  "some-service-100.slug.namespace.environment.domain.tld",
+				opName:   "forward some-service-100.slug.namespace.enviro.../some-service-100.slug.namespace.enviro.../bc4a0d48",
+			},
+		},
+		{
+			desc: "Exactly 101 chars",
+			tracer: &Tracing{
+				SpanNameLimit: 101,
+			},
+			frontend: "some-service1.namespace.environment.domain.tld",
+			backend:  "some-service1.namespace.environment.domain.tld",
+			expected: &forwarderMiddleware{
+				Tracing: &Tracing{
+					SpanNameLimit: 101,
+				},
+				frontend: "some-service1.namespace.environment.domain.tld",
+				backend:  "some-service1.namespace.environment.domain.tld",
+				opName:   "forward some-service1.namespace.environment.domain.tld/some-service1.namespace.environment.domain.tld",
+			},
+		},
+		{
+			desc: "More than 101 chars",
+			tracer: &Tracing{
+				SpanNameLimit: 101,
+			},
+			frontend: "some-service1.frontend.namespace.environment.domain.tld",
+			backend:  "some-service1.backend.namespace.environment.domain.tld",
+			expected: &forwarderMiddleware{
+				Tracing: &Tracing{
+					SpanNameLimit: 101,
+				},
+				frontend: "some-service1.frontend.namespace.environment.domain.tld",
+				backend:  "some-service1.backend.namespace.environment.domain.tld",
+				opName:   "forward some-service1.frontend.namespace.envir.../some-service1.backend.namespace.enviro.../fa49dd23",
+			},
+		},
+	}
+
+	for _, test := range testCases {
+		test := test
+		t.Run(test.desc, func(t *testing.T) {
+			t.Parallel()
+
+			actual := test.tracer.NewForwarderMiddleware(test.frontend, test.backend)
+
+			assert.Equal(t, test.expected, actual)
+			assert.True(t, len(test.expected.opName) <= test.tracer.SpanNameLimit)
+		})
+	}
+}