Adding new hosts sql tests. (#16826)

# Checklist for submitter

If some of the following don't apply, delete the relevant line.

<!-- Note that API documentation changes are now addressed by the
product design team. -->

- [x] Added/updated tests

server/datastore/mysql/hosts_test.go

@@ -99,6 +99,7 @@ func TestHosts(t *testing.T) {
 		{"IDsByName", testHostsIDsByName},
 		{"Additional", testHostsAdditional},
 		{"ByIdentifier", testHostsByIdentifier},
+		{"HostLiteByIdentifierAndID", testHostLiteByIdentifierAndID},
 		{"AddToTeam", testHostsAddToTeam},
 		{"SaveUsers", testHostsSaveUsers},
 		{"SaveHostUsers", testHostsSaveHostUsers},
@@ -2483,8 +2484,76 @@ func testHostsByIdentifier(t *testing.T, ds *Datastore) {
 	assert.Equal(t, now.UTC(), h.SeenTime)
 
 	h, err = ds.HostByIdentifier(context.Background(), "foobar")
-	require.Error(t, err)
-	require.Nil(t, h)
+	assert.ErrorIs(t, err, sql.ErrNoRows)
+	assert.Nil(t, h)
+}
+
+func testHostLiteByIdentifierAndID(t *testing.T, ds *Datastore) {
+	now := time.Now().UTC().Truncate(time.Second)
+	for i := 1; i <= 10; i++ {
+		_, err := ds.NewHost(
+			context.Background(), &fleet.Host{
+				DetailUpdatedAt: now,
+				LabelUpdatedAt:  now,
+				PolicyUpdatedAt: now,
+				SeenTime:        now,
+				OsqueryHostID:   ptr.String(fmt.Sprintf("osquery_host_id_%d", i)),
+				NodeKey:         ptr.String(fmt.Sprintf("node_key_%d", i)),
+				UUID:            fmt.Sprintf("uuid_%d", i),
+				Hostname:        fmt.Sprintf("hostname_%d", i),
+				HardwareSerial:  fmt.Sprintf("serial_%d", i),
+			},
+		)
+		require.NoError(t, err)
+	}
+
+	var (
+		h   *fleet.HostLite
+		err error
+	)
+	identifier := "uuid_1"
+	h, err = ds.HostLiteByIdentifier(context.Background(), identifier)
+	require.NoError(t, err)
+	assert.Equal(t, uint(1), h.ID)
+	assert.Equal(t, now.UTC(), h.SeenTime)
+
+	// Also test fetching host by ID
+	h, err = ds.HostLiteByID(context.Background(), h.ID)
+	require.NoError(t, err)
+	assert.Equal(t, identifier, h.UUID)
+
+	h, err = ds.HostLiteByIdentifier(context.Background(), "osquery_host_id_2")
+	require.NoError(t, err)
+	assert.Equal(t, uint(2), h.ID)
+	assert.Equal(t, now.UTC(), h.SeenTime)
+
+	h, err = ds.HostLiteByIdentifier(context.Background(), "node_key_4")
+	require.NoError(t, err)
+	assert.Equal(t, uint(4), h.ID)
+	assert.Equal(t, now.UTC(), h.SeenTime)
+
+	h, err = ds.HostLiteByIdentifier(context.Background(), "hostname_7")
+	require.NoError(t, err)
+	assert.Equal(t, uint(7), h.ID)
+	assert.Equal(t, now.UTC(), h.SeenTime)
+
+	h, err = ds.HostLiteByIdentifier(context.Background(), "serial_9")
+	require.NoError(t, err)
+	assert.Equal(t, uint(9), h.ID)
+	assert.Equal(t, now.UTC(), h.SeenTime)
+
+	h, err = ds.HostLiteByIdentifier(context.Background(), "foobar")
+	assert.ErrorIs(t, err, sql.ErrNoRows)
+	assert.Nil(t, h)
+
+	h, err = ds.HostLiteByIdentifier(context.Background(), "")
+	assert.ErrorIs(t, err, sql.ErrNoRows)
+	assert.Nil(t, h)
+
+	h, err = ds.HostLiteByID(context.Background(), 0)
+	assert.ErrorIs(t, err, sql.ErrNoRows)
+	assert.Nil(t, h)
+
 }
 
 func testHostsAddToTeam(t *testing.T, ds *Datastore) {