[task scheduler] Move files from build_scheduler/ to task_scheduler/

build_scheduler/go/db/modified_tasks_test.go

-package db
-
-import (
-        "testing"
-        "time"
-
-        assert "github.com/stretchr/testify/require"
-
-        "go.skia.org/infra/go/testutils"
-)
-
-func TestModifiedTasks(t *testing.T) {
-        m := ModifiedTasks{}
-
-        _, err := m.GetModifiedTasks("dummy-id")
-        assert.True(t, IsUnknownId(err))
-
-        id, err := m.StartTrackingModifiedTasks()
-        assert.NoError(t, err)
-
-        tasks, err := m.GetModifiedTasks(id)
-        assert.NoError(t, err)
-        assert.Equal(t, 0, len(tasks))
-
-        t1 := makeTask(time.Unix(0, 1470674132000000), []string{"a", "b", "c", "d"})
-        t1.Id = "1"
-
-        // Insert the task.
-        m.TrackModifiedTask(t1)
-
-        // Ensure that the task shows up in the modified list.
-        tasks, err = m.GetModifiedTasks(id)
-        assert.NoError(t, err)
-        testutils.AssertDeepEqual(t, []*Task{t1}, tasks)
-
-        // Insert two more tasks.
-        t2 := makeTask(time.Unix(0, 1470674376000000), []string{"e", "f"})
-        t2.Id = "2"
-        m.TrackModifiedTask(t2)
-        t3 := makeTask(time.Unix(0, 1470674884000000), []string{"g", "h"})
-        t3.Id = "3"
-        m.TrackModifiedTask(t3)
-
-        // Ensure that both tasks show up in the modified list.
-        tasks, err = m.GetModifiedTasks(id)
-        assert.NoError(t, err)
-        testutils.AssertDeepEqual(t, []*Task{t2, t3}, tasks)
-
-        // Check StopTrackingModifiedTasks.
-        m.StopTrackingModifiedTasks(id)
-        _, err = m.GetModifiedTasks(id)
-        assert.True(t, IsUnknownId(err))
-}
-
-// Test that if a Task is modified multiple times, it only appears once in the
-// result of GetModifiedTasks.
-func TestMultipleModifications(t *testing.T) {
-        m := ModifiedTasks{}
-
-        id, err := m.StartTrackingModifiedTasks()
-        assert.NoError(t, err)
-
-        t1 := makeTask(time.Unix(0, 1470674132000000), []string{"a", "b", "c", "d"})
-        t1.Id = "1"
-
-        // Insert the task.
-        m.TrackModifiedTask(t1)
-
-        // Make several more modifications.
-        t1.Status = TASK_STATUS_RUNNING
-        m.TrackModifiedTask(t1)
-        t1.Status = TASK_STATUS_SUCCESS
-        m.TrackModifiedTask(t1)
-
-        // Ensure that the task shows up only once in the modified list.
-        tasks, err := m.GetModifiedTasks(id)
-        assert.NoError(t, err)
-        testutils.AssertDeepEqual(t, []*Task{t1}, tasks)
-}
-
-func TestModifiedTasksTooManyUsers(t *testing.T) {
-        m := ModifiedTasks{}
-
-        var oneId string
-        // Max out the number of modified-tasks users; ensure that we error out.
-        for i := 0; i < MAX_MODIFIED_TASKS_USERS; i++ {
-                id, err := m.StartTrackingModifiedTasks()
-                assert.NoError(t, err)
-                oneId = id
-        }
-        _, err := m.StartTrackingModifiedTasks()
-        assert.True(t, IsTooManyUsers(err))
-
-        m.StopTrackingModifiedTasks(oneId)
-        _, err = m.StartTrackingModifiedTasks()
-        assert.NoError(t, err)
-}