micro/metadata/metadata_test.go

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package metadata
import (
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"context"
"fmt"
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"testing"
)
func testCtx(ctx context.Context) {
md := New(2)
md.Set("Key1", "Val1_new")
md.Set("Key3", "Val3")
SetOutgoingContext(ctx, md)
}
func TestPassing(t *testing.T) {
ctx := context.TODO()
md1 := New(2)
md1.Set("Key1", "Val1")
md1.Set("Key2", "Val2")
ctx = NewIncomingContext(ctx, md1)
testCtx(ctx)
md, ok := FromOutgoingContext(ctx)
if !ok {
t.Fatalf("missing metadata from outgoing context")
}
fmt.Printf("%#+v\n", md)
}
func TestMerge(t *testing.T) {
omd := Metadata{
"key1": "val1",
}
mmd := Metadata{
"key2": "val2",
}
nmd := Merge(omd, mmd, true)
if len(nmd) != 2 {
t.Fatalf("merge failed: %v", nmd)
}
}
func TestIterator(t *testing.T) {
md := Metadata{
"1Last": "last",
"2First": "first",
"3Second": "second",
}
iter := md.Iterator()
var k, v string
for iter.Next(&k, &v) {
//fmt.Printf("k: %s, v: %s\n", k, v)
}
}
func TestMedataCanonicalKey(t *testing.T) {
md := New(1)
md.Set("x-request-id", "12345")
v, ok := md.Get("x-request-id")
if !ok {
t.Fatalf("failed to get x-request-id")
} else if v != "12345" {
t.Fatalf("invalid metadata value: %s != %s", "12345", v)
}
v, ok = md.Get("X-Request-Id")
if !ok {
t.Fatalf("failed to get x-request-id")
} else if v != "12345" {
t.Fatalf("invalid metadata value: %s != %s", "12345", v)
}
v, ok = md.Get("X-Request-ID")
if !ok {
t.Fatalf("failed to get x-request-id")
} else if v != "12345" {
t.Fatalf("invalid metadata value: %s != %s", "12345", v)
}
}
func TestMetadataSet(t *testing.T) {
md := New(1)
md.Set("Key", "val")
val, ok := md.Get("Key")
if !ok {
t.Fatal("key Key not found")
}
if val != "val" {
t.Errorf("key Key with value val != %v", val)
}
}
func TestMetadataDelete(t *testing.T) {
md := Metadata{
"Foo": "bar",
"Baz": "empty",
}
md.Del("Baz")
_, ok := md.Get("Baz")
if ok {
t.Fatal("key Baz not deleted")
}
}
func TestNilContext(t *testing.T) {
var ctx context.Context
_, ok := FromContext(ctx)
if ok {
t.Fatal("nil context")
}
}
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func TestMetadataCopy(t *testing.T) {
md := Metadata{
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"Foo": "bar",
"Bar": "baz",
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}
cp := Copy(md)
for k, v := range md {
if cv := cp[k]; cv != v {
t.Fatalf("Got %s:%s for %s:%s", k, cv, k, v)
}
}
}
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func TestMetadataContext(t *testing.T) {
md := Metadata{
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"Foo": "bar",
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}
ctx := NewContext(context.TODO(), md)
emd, ok := FromContext(ctx)
if !ok {
t.Errorf("Unexpected error retrieving metadata, got %t", ok)
}
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if emd["Foo"] != md["Foo"] {
t.Errorf("Expected key: %s val: %s, got key: %s val: %s", "Foo", md["Foo"], "Foo", emd["Foo"])
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}
if i := len(emd); i != 1 {
t.Errorf("Expected metadata length 1 got %d", i)
}
}