Use int as priority value type.

Do not use unsigned int for merely non-negative quantities as it
complicates simple arithmetic.

internal/rdb/inspect.go

@@ -245,10 +245,10 @@ func reverse(x []string) {
 // for the list operation.
 type Pagination struct {
 	// Number of items in the page.
-	Size uint
+	Size int
 
 	// Page number starting from zero.
-	Page uint
+	Page int
 }
 
 func (p Pagination) start() int64 {

internal/rdb/inspect_test.go

@@ -317,8 +317,8 @@ func TestListEnqueuedPagination(t *testing.T) {
 	tests := []struct {
 		desc      string
 		qname     string
-		page      uint
-		size      uint
+		page      int
+		size      int
 		wantSize  int
 		wantFirst string
 		wantLast  string
@@ -418,8 +418,8 @@ func TestListInProgressPagination(t *testing.T) {
 
 	tests := []struct {
 		desc      string
-		page      uint
-		size      uint
+		page      int
+		size      int
 		wantSize  int
 		wantFirst string
 		wantLast  string
@@ -524,8 +524,8 @@ func TestListScheduledPagination(t *testing.T) {
 
 	tests := []struct {
 		desc      string
-		page      uint
-		size      uint
+		page      int
+		size      int
 		wantSize  int
 		wantFirst string
 		wantLast  string
@@ -667,8 +667,8 @@ func TestListRetryPagination(t *testing.T) {
 
 	tests := []struct {
 		desc      string
-		page      uint
-		size      uint
+		page      int
+		size      int
 		wantSize  int
 		wantFirst string
 		wantLast  string
@@ -800,8 +800,8 @@ func TestListDeadPagination(t *testing.T) {
 
 	tests := []struct {
 		desc      string
-		page      uint
-		size      uint
+		page      int
+		size      int
 		wantSize  int
 		wantFirst string
 		wantLast  string
@@ -2056,7 +2056,7 @@ func TestListProcesses(t *testing.T) {
 
 	ps1 := &base.ProcessInfo{
 		Concurrency:       10,
-		Queues:            map[string]uint{"default": 1},
+		Queues:            map[string]int{"default": 1},
 		Host:              "do.droplet1",
 		PID:               1234,
 		State:             "running",
@@ -2066,7 +2066,7 @@ func TestListProcesses(t *testing.T) {
 
 	ps2 := &base.ProcessInfo{
 		Concurrency:       20,
-		Queues:            map[string]uint{"email": 1},
+		Queues:            map[string]int{"email": 1},
 		Host:              "do.droplet2",
 		PID:               9876,
 		State:             "stopped",

internal/rdb/rdb_test.go

@@ -745,7 +745,7 @@ func TestReadWriteClearProcessInfo(t *testing.T) {
 	r := setup(t)
 	pinfo := &base.ProcessInfo{
 		Concurrency:       10,
-		Queues:            map[string]uint{"default": 2, "email": 5, "low": 1},
+		Queues:            map[string]int{"default": 2, "email": 5, "low": 1},
 		PID:               98765,
 		Host:              "localhost",
 		State:             "running",