implement volume mount for container job (#1101)

* implement volume mount for container job

* Update pkg/runner/run_context.go

Co-authored-by: Ryan <me@hackerc.at>

* add tests for container volume mount options

* remove unused code

* prefer if-else instead of if-continue

* remove continue

* add some tests

Co-authored-by: Ryan <me@hackerc.at>
Co-authored-by: mergify[bot] <37929162+mergify[bot]@users.noreply.github.com>

pkg/runner/run_context_test.go

@@ -293,6 +293,44 @@ func TestRunContext_GetBindsAndMounts(t *testing.T) {
 			}
 		}
 	}
+
+	t.Run("ContainerVolumeMountTest", func(t *testing.T) {
+		tests := []struct {
+			name      string
+			volumes   []string
+			wantbind  string
+			wantmount map[string]string
+		}{
+			{"BindAnonymousVolume", []string{"/volume"}, "/volume", map[string]string{}},
+			{"BindHostFile", []string{"/path/to/file/on/host:/volume"}, "/path/to/file/on/host:/volume", map[string]string{}},
+			{"MountExistingVolume", []string{"volume-id:/volume"}, "", map[string]string{"volume-id": "/volume"}},
+		}
+
+		for _, testcase := range tests {
+			t.Run(testcase.name, func(t *testing.T) {
+				job := &model.Job{}
+				err := job.RawContainer.Encode(map[string][]string{
+					"volumes": testcase.volumes,
+				})
+				assert.NoError(t, err)
+
+				rc := rctemplate.Clone()
+				rc.Run.JobID = "job1"
+				rc.Run.Workflow.Jobs = map[string]*model.Job{"job1": job}
+
+				gotbind, gotmount := rc.GetBindsAndMounts()
+
+				if len(testcase.wantbind) > 0 {
+					assert.Contains(t, gotbind, testcase.wantbind)
+				}
+
+				for k, v := range testcase.wantmount {
+					assert.Contains(t, gotmount, k)
+					assert.Equal(t, gotmount[k], v)
+				}
+			})
+		}
+	})
 }
 
 func TestGetGitHubContext(t *testing.T) {