refactor: move Step StepActionReference test

Now that `Step` implements the `Validatable` interface the tests for the
`Step` validation are moved from `task_validation_test.go` to
`container_validation_test.go`.

The following tests is moved and renamed:
- `TestTaskSpecStepActionReferenceValidate`
  - `TestStepWithStepActionReferenceValidate`

Issue #8700.

Signed-off-by: Stanislav Jakuschevskij <[email protected]>

Author: twoGiants

pkg/apis/pipeline/v1/container_validation_test.go

@@ -171,6 +171,43 @@ func TestRef_Invalid(t *testing.T) {
 	}
 }
 
+func TestStepWithStepActionReferenceValidate(t *testing.T) {
+	tests := []struct {
+		name string
+		Step v1.Step
+	}{{
+		name: "valid stepAction ref",
+		Step: v1.Step{
+			Name: "mystep",
+			Ref: &v1.Ref{
+				Name: "stepAction",
+			},
+		},
+	}, {
+		name: "valid use of params with Ref",
+		Step: v1.Step{
+			Ref: &v1.Ref{
+				Name: "stepAction",
+			},
+			Params: v1.Params{{
+				Name: "param",
+			}},
+		},
+	}}
+	for _, st := range tests {
+		t.Run(st.name, func(t *testing.T) {
+			ctx := config.ToContext(context.Background(), &config.Config{
+				FeatureFlags: &config.FeatureFlags{
+					EnableStepActions: true,
+				},
+			})
+			if err := st.Step.Validate(ctx); err != nil {
+				t.Errorf("Step.Validate() = %v", err)
+			}
+		})
+	}
+}
+
 func TestSidecarValidate(t *testing.T) {
 	tests := []struct {
 		name    string

pkg/apis/pipeline/v1/task_validation_test.go

@@ -557,43 +557,6 @@ func TestTaskSpecValidate(t *testing.T) {
 	}
 }
 
-func TestTaskSpecStepActionReferenceValidate(t *testing.T) {
-	tests := []struct {
-		name  string
-		Steps []v1.Step
-	}{{
-		name: "valid stepaction ref",
-		Steps: []v1.Step{{
-			Name: "mystep",
-			Ref: &v1.Ref{
-				Name: "stepAction",
-			},
-		}},
-	}, {
-		name: "valid use of params with Ref",
-		Steps: []v1.Step{{
-			Ref: &v1.Ref{
-				Name: "stepAction",
-			},
-			Params: v1.Params{{
-				Name: "param",
-			}},
-		}},
-	}}
-	for _, tt := range tests {
-		t.Run(tt.name, func(t *testing.T) {
-			ts := &v1.TaskSpec{
-				Steps: tt.Steps,
-			}
-			ctx := context.Background()
-			ts.SetDefaults(ctx)
-			if err := ts.Validate(ctx); err != nil {
-				t.Errorf("TaskSpec.Validate() = %v", err)
-			}
-		})
-	}
-}
-
 func TestTaskValidateError(t *testing.T) {
 	type fields struct {
 		Params []v1.ParamSpec