feat(tmpl): enhance ToYaml test with multiple scenarios (#2031)

* feat(tmpl): enhance ToYaml test with multiple scenarios

Signed-off-by: yxxhero <aiopsclub@163.com>

docs/index.md

@@ -574,6 +574,7 @@ Helmfile uses some OS environment variables to override default behaviour:
 * `HELMFILE_CACHE_HOME` - specify directory to store cached files for remote operations
 * `HELMFILE_FILE_PATH` - specify the path to the helmfile.yaml file
 * `HELMFILE_INTERACTIVE` - enable interactive mode, expecting `true` lower case. The same as `--interactive` CLI flag
+* `HELMFILE_ENABLE_GOCCY_GOYAML_JSON_STYLE`: - enable JSON style for *goccy/go-yaml* instead of *gopkg.in/yaml.v2*.  It's `false` by default in Helmfile. it will add quotes to string values.
 
 ## CLI Reference
 

pkg/envvar/const.go

@@ -6,13 +6,14 @@ const (
 	// use helm status to check if a release exists before installing it
 	UseHelmStatusToCheckReleaseExistence = "HELMFILE_USE_HELM_STATUS_TO_CHECK_RELEASE_EXISTENCE"
 
-	DisableRunnerUniqueID = "HELMFILE_DISABLE_RUNNER_UNIQUE_ID"
-	Experimental          = "HELMFILE_EXPERIMENTAL" // environment variable for experimental features, expecting "true" lower case
-	Environment           = "HELMFILE_ENVIRONMENT"
-	FilePath              = "HELMFILE_FILE_PATH"
-	TempDir               = "HELMFILE_TEMPDIR"
-	UpgradeNoticeDisabled = "HELMFILE_UPGRADE_NOTICE_DISABLED"
-	GoccyGoYaml           = "HELMFILE_GOCCY_GOYAML"
-	CacheHome             = "HELMFILE_CACHE_HOME"
-	Interactive           = "HELMFILE_INTERACTIVE"
+	DisableRunnerUniqueID      = "HELMFILE_DISABLE_RUNNER_UNIQUE_ID"
+	Experimental               = "HELMFILE_EXPERIMENTAL" // environment variable for experimental features, expecting "true" lower case
+	Environment                = "HELMFILE_ENVIRONMENT"
+	FilePath                   = "HELMFILE_FILE_PATH"
+	TempDir                    = "HELMFILE_TEMPDIR"
+	UpgradeNoticeDisabled      = "HELMFILE_UPGRADE_NOTICE_DISABLED"
+	GoccyGoYaml                = "HELMFILE_GOCCY_GOYAML"
+	CacheHome                  = "HELMFILE_CACHE_HOME"
+	Interactive                = "HELMFILE_INTERACTIVE"
+	EnableGoccyGoYamlJSONStyle = "HELMFILE_ENABLE_GOCCY_GOYAML_JSON_STYLE"
 )

pkg/tmpl/context_funcs_test.go

@@ -4,12 +4,14 @@ import (
 	"encoding/json"
 	"fmt"
 	"io/fs"
+	"os"
 	"path/filepath"
 	goruntime "runtime"
 	"testing"
 
 	"github.com/stretchr/testify/require"
 
+	"github.com/helmfile/helmfile/pkg/envvar"
 	"github.com/helmfile/helmfile/pkg/filesystem"
 	"github.com/helmfile/helmfile/pkg/runtime"
 )
@@ -186,18 +188,80 @@ func TestToYaml_NestedMapInterfaceKey(t *testing.T) {
 }
 
 func TestToYaml(t *testing.T) {
-	expected := `foo:
-  bar: BAR
-`
-	// nolint: unconvert
-	vals := Values(map[string]any{
-		"foo": map[string]any{
-			"bar": "BAR",
+	tests := []struct {
+		name            string
+		input           any
+		expected        string
+		wantErr         bool
+		enableJsonStyle bool
+	}{
+		{
+			// https://github.com/helmfile/helmfile/issues/2024
+			name:            "test unmarshalling issue 2024",
+			enableJsonStyle: true,
+			input:           map[string]any{"thisShouldBeString": "01234567890123456789"},
+			expected: `'thisShouldBeString': '01234567890123456789'
+`,
 		},
-	})
-	actual, err := ToYaml(vals)
-	require.NoError(t, err)
-	require.Equal(t, expected, actual)
+		{
+			name:  "test unmarshalling issue 2024 with int64",
+			input: map[string]any{"thisShouldBeString": 1234567890123456789},
+			expected: `thisShouldBeString: 1234567890123456789
+`,
+		},
+		{
+			name:  "test unmarshalling object",
+			input: map[string]any{"foo": map[string]any{"bar": "BAR"}},
+			expected: `foo:
+  bar: BAR
+`,
+		},
+		{
+			name:  "test unmarshalling array",
+			input: []any{"foo", map[string]any{"bar": "BAR"}},
+			expected: `- foo
+- bar: BAR
+`,
+		},
+		{
+			name:     "test unmarshalling string",
+			input:    "foo",
+			expected: "foo\n",
+		},
+		{
+			name:     "test unmarshalling number",
+			input:    1234,
+			expected: "1234\n",
+		},
+		{
+			name:     "test unmarshalling boolean",
+			input:    true,
+			expected: "true\n",
+		},
+		{
+			name:     "test unmarshalling null",
+			input:    nil,
+			expected: "null\n",
+		},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			if tt.enableJsonStyle {
+				_ = os.Setenv(envvar.EnableGoccyGoYamlJSONStyle, "true")
+			}
+			defer func() {
+				_ = os.Unsetenv(envvar.EnableGoccyGoYamlJSONStyle)
+			}()
+			actual, err := ToYaml(tt.input)
+			if tt.wantErr {
+				require.Error(t, err)
+			} else {
+				require.NoError(t, err)
+			}
+			require.Equal(t, tt.expected, actual)
+		})
+	}
 }
 
 func testFromYamlObject(t *testing.T) {

pkg/yaml/yaml.go

@@ -3,10 +3,12 @@ package yaml
 import (
 	"bytes"
 	"io"
+	"os"
 
 	"github.com/goccy/go-yaml"
 	v2 "gopkg.in/yaml.v2"
 
+	"github.com/helmfile/helmfile/pkg/envvar"
 	"github.com/helmfile/helmfile/pkg/runtime"
 )
 
@@ -66,11 +68,19 @@ func NewDecoder(data []byte, strict bool) func(any) error {
 func Marshal(v any) ([]byte, error) {
 	if runtime.GoccyGoYaml {
 		var b bytes.Buffer
-		yamlEncoder := yaml.NewEncoder(
-			&b,
+		yamlEncoderOpts := []yaml.EncodeOption{
 			yaml.Indent(2),
 			yaml.UseSingleQuote(true),
 			yaml.UseLiteralStyleIfMultiline(true),
+		}
+		// enable JSON style if the envvar is set
+		if os.Getenv(envvar.EnableGoccyGoYamlJSONStyle) == "true" {
+			yamlEncoderOpts = append(yamlEncoderOpts, yaml.JSON(), yaml.Flow(false))
+		}
+
+		yamlEncoder := yaml.NewEncoder(
+			&b,
+			yamlEncoderOpts...,
 		)
 		err := yamlEncoder.Encode(v)
 		defer func() {