CT Google Storage utils to download/upload artifacts for workers

ct/go/util/gs_test.go

+package util
+
+import (
+        "fmt"
+        "io/ioutil"
+        "os"
+        "path/filepath"
+        "testing"
+
+        "code.google.com/p/google-api-go-client/storage/v1"
+        "github.com/stretchr/testify/assert"
+        "skia.googlesource.com/buildbot.git/go/util"
+)
+
+func TestDownloadWorkerArtifacts(t *testing.T) {
+        // Skip if we are running short tests because this test needs a valid
+        // google_storage_token.data file with read write access.
+        if testing.Short() {
+                t.Skip("Skipping test because we are running in short mode.")
+        }
+
+        testPagesetsDirName := filepath.Join("unit-tests", "util", "page_sets")
+        client, _ := GetOAuthClient()
+        gs, err := NewGsUtil(client)
+        if err != nil {
+                t.Errorf("Unexpected error: %s", err)
+        }
+
+        tmpDir := filepath.Join(os.TempDir(), "util_test")
+        StorageDir = tmpDir
+        defer os.RemoveAll(tmpDir)
+        if err := gs.DownloadWorkerArtifacts(testPagesetsDirName, "10k", 1); err != nil {
+                t.Errorf("Unexpected error: %s", err)
+        }
+
+        // Examine contents of the local directory.
+        localDir := filepath.Join(tmpDir, testPagesetsDirName, "10k")
+        files, err := ioutil.ReadDir(localDir)
+        if err != nil {
+                t.Errorf("Unexpected error: %s", err)
+        }
+        assert.Equal(t, 3, len(files))
+        assert.Equal(t, "TIMESTAMP", files[0].Name())
+        assert.Equal(t, "alexa1-1.py", files[1].Name())
+        assert.Equal(t, "alexa2-2.py", files[2].Name())
+}
+
+func TestUploadWorkerArtifacts(t *testing.T) {
+        // Skip if we are running short tests because this test needs a valid
+        // google_storage_token.data file with read write access.
+        if testing.Short() {
+                t.Skip("Skipping test because we are running in short mode.")
+        }
+
+        client, _ := GetOAuthClient()
+        gs, err := NewGsUtil(client)
+        if err != nil {
+                t.Errorf("Unexpected error: %s", err)
+        }
+        testDir := "testupload"
+        testPagesetType := "10ktest"
+        StorageDir = "testdata"
+        if err := gs.UploadWorkerArtifacts(testDir, testPagesetType, 1); err != nil {
+                t.Errorf("Unexpected error: %s", err)
+        }
+
+        // Examine contents of the remote directory and then clean it up.
+        service, err := storage.New(gs.client)
+        if err != nil {
+                t.Errorf("Unexpected error: %s", err)
+        }
+        gsDir := filepath.Join(testDir, testPagesetType, "slave1")
+        resp, err := service.Objects.List(GS_BUCKET_NAME).Prefix(gsDir + "/").Do()
+        if err != nil {
+                t.Errorf("Unexpected error: %s", err)
+        }
+        assert.Equal(t, 3, len(resp.Items))
+        for index, fileName := range []string{"TIMESTAMP", "alexa1-1.py", "alexa2-2.py"} {
+                filePath := fmt.Sprintf("%s/%s", gsDir, fileName)
+                defer service.Objects.Delete(GS_BUCKET_NAME, filePath).Do()
+                assert.Equal(t, filePath, resp.Items[index].Name)
+        }
+}
+
+func TestAreTimestampsEqual(t *testing.T) {
+        gs, err := NewGsUtil(util.NewTimeoutClient())
+        if err != nil {
+                t.Errorf("Unexpected error: %s", err)
+        }
+
+        tmpDir := filepath.Join(os.TempDir(), "util_test")
+        os.Mkdir(tmpDir, 0777)
+        defer os.RemoveAll(tmpDir)
+
+        f, err := os.Create(filepath.Join(tmpDir, TIMESTAMP_FILE_NAME))
+        if err != nil {
+                t.Errorf("Unexpected error: %s", err)
+        }
+        defer f.Close()
+
+        // Test with matching timestamps.
+        f.WriteString(GS_TEST_TIMESTAMP_VALUE)
+        result1, err := gs.AreTimeStampsEqual(tmpDir, "unit-tests/util/")
+        if err != nil {
+                t.Errorf("Unexpected error: %s", err)
+        }
+        assert.True(t, result1)
+
+        // Test with differing timestamps.
+        f.WriteString(GS_TEST_TIMESTAMP_VALUE)
+        result2, err := gs.AreTimeStampsEqual(tmpDir, "unit-tests/util/")
+        if err != nil {
+                t.Errorf("Unexpected error: %s", err)
+        }
+        assert.False(t, result2)
+
+        // Test with Google Storage timestamp missing.
+        result3, err := gs.AreTimeStampsEqual(tmpDir, "unit-tests/util/dummy_name/")
+        if err == nil {
+                t.Error("Expected an error")
+        }
+        assert.False(t, result3)
+
+        // Test with local timestamp missing.
+        result4, err := gs.AreTimeStampsEqual(tmpDir+"dummy_name", "unit-tests/util/")
+        if err == nil {
+                t.Error("Expected an error")
+        }
+        assert.False(t, result4)
+}