Share test initializer in common helper function (#1695)

## Changes

These tests inadvertently re-ran mutators, the first time through
`loadTarget` and the second time by running `phases.Initialize()`
themselves. Some of the mutators that are executed in
`phases.Initialize()` are also run as part of `loadTarget`. This is
overdue a refactor to make it unambiguous what runs when. Until then,
this removes the duplicated execution.

## Tests

Unit tests pass.

bundle/tests/loader.go

@@ -8,6 +8,10 @@ import (
 	"github.com/databricks/cli/bundle/config/mutator"
 	"github.com/databricks/cli/bundle/phases"
 	"github.com/databricks/cli/libs/diag"
+	"github.com/databricks/databricks-sdk-go/config"
+	"github.com/databricks/databricks-sdk-go/experimental/mocks"
+	"github.com/databricks/databricks-sdk-go/service/iam"
+	"github.com/stretchr/testify/mock"
 	"github.com/stretchr/testify/require"
 )
 
@@ -43,3 +47,28 @@ func loadTargetWithDiags(path, env string) (*bundle.Bundle, diag.Diagnostics) {
 	))
 	return b, diags
 }
+
+func configureMock(t *testing.T, b *bundle.Bundle) {
+	// Configure mock workspace client
+	m := mocks.NewMockWorkspaceClient(t)
+	m.WorkspaceClient.Config = &config.Config{
+		Host: "https://mock.databricks.workspace.com",
+	}
+	m.GetMockCurrentUserAPI().EXPECT().Me(mock.Anything).Return(&iam.User{
+		UserName: "user@domain.com",
+	}, nil)
+	b.SetWorkpaceClient(m.WorkspaceClient)
+}
+
+func initializeTarget(t *testing.T, path, env string) (*bundle.Bundle, diag.Diagnostics) {
+	b := load(t, path)
+	configureMock(t, b)
+
+	ctx := context.Background()
+	diags := bundle.Apply(ctx, b, bundle.Seq(
+		mutator.SelectTarget(env),
+		phases.Initialize(),
+	))
+
+	return b, diags
+}

bundle/tests/pipeline_glob_paths_test.go

@@ -1,33 +1,13 @@
 package config_tests
 
 import (
-	"context"
 	"testing"
 
-	"github.com/databricks/cli/bundle"
-	"github.com/databricks/cli/bundle/phases"
-	"github.com/databricks/databricks-sdk-go/config"
-	"github.com/databricks/databricks-sdk-go/experimental/mocks"
-	"github.com/databricks/databricks-sdk-go/service/iam"
-	"github.com/stretchr/testify/mock"
 	"github.com/stretchr/testify/require"
 )
 
 func TestExpandPipelineGlobPaths(t *testing.T) {
-	b := loadTarget(t, "./pipeline_glob_paths", "default")
-
-	// Configure mock workspace client
-	m := mocks.NewMockWorkspaceClient(t)
-	m.WorkspaceClient.Config = &config.Config{
-		Host: "https://mock.databricks.workspace.com",
-	}
-	m.GetMockCurrentUserAPI().EXPECT().Me(mock.Anything).Return(&iam.User{
-		UserName: "user@domain.com",
-	}, nil)
-	b.SetWorkpaceClient(m.WorkspaceClient)
-
-	ctx := context.Background()
-	diags := bundle.Apply(ctx, b, phases.Initialize())
+	b, diags := initializeTarget(t, "./pipeline_glob_paths", "default")
 	require.NoError(t, diags.Error())
 	require.Equal(
 		t,
@@ -37,19 +17,6 @@ func TestExpandPipelineGlobPaths(t *testing.T) {
 }
 
 func TestExpandPipelineGlobPathsWithNonExistent(t *testing.T) {
-	b := loadTarget(t, "./pipeline_glob_paths", "error")
-
-	// Configure mock workspace client
-	m := mocks.NewMockWorkspaceClient(t)
-	m.WorkspaceClient.Config = &config.Config{
-		Host: "https://mock.databricks.workspace.com",
-	}
-	m.GetMockCurrentUserAPI().EXPECT().Me(mock.Anything).Return(&iam.User{
-		UserName: "user@domain.com",
-	}, nil)
-	b.SetWorkpaceClient(m.WorkspaceClient)
-
-	ctx := context.Background()
-	diags := bundle.Apply(ctx, b, phases.Initialize())
+	_, diags := initializeTarget(t, "./pipeline_glob_paths", "error")
 	require.ErrorContains(t, diags.Error(), "notebook ./non-existent not found")
 }

bundle/tests/relative_path_translation_test.go

@@ -1,36 +1,14 @@
 package config_tests
 
 import (
-	"context"
 	"testing"
 
-	"github.com/databricks/cli/bundle"
-	"github.com/databricks/cli/bundle/phases"
-	"github.com/databricks/databricks-sdk-go/config"
-	"github.com/databricks/databricks-sdk-go/experimental/mocks"
-	"github.com/databricks/databricks-sdk-go/service/iam"
 	"github.com/stretchr/testify/assert"
-	"github.com/stretchr/testify/mock"
 	"github.com/stretchr/testify/require"
 )
 
-func configureMock(t *testing.T, b *bundle.Bundle) {
-	// Configure mock workspace client
-	m := mocks.NewMockWorkspaceClient(t)
-	m.WorkspaceClient.Config = &config.Config{
-		Host: "https://mock.databricks.workspace.com",
-	}
-	m.GetMockCurrentUserAPI().EXPECT().Me(mock.Anything).Return(&iam.User{
-		UserName: "user@domain.com",
-	}, nil)
-	b.SetWorkpaceClient(m.WorkspaceClient)
-}
-
 func TestRelativePathTranslationDefault(t *testing.T) {
-	b := loadTarget(t, "./relative_path_translation", "default")
-	configureMock(t, b)
-
-	diags := bundle.Apply(context.Background(), b, phases.Initialize())
+	b, diags := initializeTarget(t, "./relative_path_translation", "default")
 	require.NoError(t, diags.Error())
 
 	t0 := b.Config.Resources.Jobs["job"].Tasks[0]
@@ -40,10 +18,7 @@ func TestRelativePathTranslationDefault(t *testing.T) {
 }
 
 func TestRelativePathTranslationOverride(t *testing.T) {
-	b := loadTarget(t, "./relative_path_translation", "override")
-	configureMock(t, b)
-
-	diags := bundle.Apply(context.Background(), b, phases.Initialize())
+	b, diags := initializeTarget(t, "./relative_path_translation", "override")
 	require.NoError(t, diags.Error())
 
 	t0 := b.Config.Resources.Jobs["job"].Tasks[0]