Decouple use of otel/internal/internaltest (#4424)

* Add internaltest templates

* Generate internaltest using gotmpl

* Generate the sdk/internal/internaltest pkg

* Use sdk/internal/internaltest in sdk module

* Generate exporters/jaeger/internal/internaltest pkg

* Use exporters/jaeger/internal/internaltest in jaeger exporter

* Generate the exporters/zipkin/internal/internaltest pkg

* Use local internaltest in zipkin exporter

* Fix import path name in trace test

sdk/internal/internaltest/text_map_carrier_test.go

@@ -0,0 +1,86 @@
+// Code created by gotmpl. DO NOT MODIFY.
+// source: internal/shared/internaltest/text_map_carrier_test.go.tmpl
+
+// Copyright The OpenTelemetry Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package internaltest
+
+import (
+	"reflect"
+	"testing"
+)
+
+var (
+	key, value = "test", "true"
+)
+
+func TestTextMapCarrierKeys(t *testing.T) {
+	tmc := NewTextMapCarrier(map[string]string{key: value})
+	expected, actual := []string{key}, tmc.Keys()
+	if !reflect.DeepEqual(actual, expected) {
+		t.Errorf("expected tmc.Keys() to be %v but it was %v", expected, actual)
+	}
+}
+
+func TestTextMapCarrierGet(t *testing.T) {
+	tmc := NewTextMapCarrier(map[string]string{key: value})
+	tmc.GotN(t, 0)
+	if got := tmc.Get("empty"); got != "" {
+		t.Errorf("TextMapCarrier.Get returned %q for an empty key", got)
+	}
+	tmc.GotKey(t, "empty")
+	tmc.GotN(t, 1)
+	if got := tmc.Get(key); got != value {
+		t.Errorf("TextMapCarrier.Get(%q) returned %q, want %q", key, got, value)
+	}
+	tmc.GotKey(t, key)
+	tmc.GotN(t, 2)
+}
+
+func TestTextMapCarrierSet(t *testing.T) {
+	tmc := NewTextMapCarrier(nil)
+	tmc.SetN(t, 0)
+	tmc.Set(key, value)
+	if got, ok := tmc.data[key]; !ok {
+		t.Errorf("TextMapCarrier.Set(%q,%q) failed to store pair", key, value)
+	} else if got != value {
+		t.Errorf("TextMapCarrier.Set(%q,%q) stored (%q,%q), not (%q,%q)", key, value, key, got, key, value)
+	}
+	tmc.SetKeyValue(t, key, value)
+	tmc.SetN(t, 1)
+}
+
+func TestTextMapCarrierReset(t *testing.T) {
+	tmc := NewTextMapCarrier(map[string]string{key: value})
+	tmc.GotN(t, 0)
+	tmc.SetN(t, 0)
+	tmc.Reset(nil)
+	tmc.GotN(t, 0)
+	tmc.SetN(t, 0)
+	if got := tmc.Get(key); got != "" {
+		t.Error("TextMapCarrier.Reset() failed to clear initial data")
+	}
+	tmc.GotN(t, 1)
+	tmc.GotKey(t, key)
+	tmc.Set(key, value)
+	tmc.SetKeyValue(t, key, value)
+	tmc.SetN(t, 1)
+	tmc.Reset(nil)
+	tmc.GotN(t, 0)
+	tmc.SetN(t, 0)
+	if got := tmc.Get(key); got != "" {
+		t.Error("TextMapCarrier.Reset() failed to clear data")
+	}
+}