feat: strings exprs support ToUpper and ToLower function (#364)

* feat: strings exprs support ToUpper and ToLower function

Signed-off-by: Viet-Anh Duong <vietanhs0817@gmail.com>

* docs: add ToLower and ToUpper document

Signed-off-by: Viet-Anh Duong <vietanhs0817@gmail.com>

Author: x00real

docs/functions.md

@@ -1,25 +1,37 @@
 ### **time**
+
 Time related functions.
 
 <hr>
 **`time.Now() Time`**
 
-Executes function built-in Golang [time.Now](https://golang.org/pkg/time/#Now) function.
-Returns an instance of Golang [Time](https://golang.org/pkg/time/#Time).
+Executes function built-in Golang [time.Now](https://golang.org/pkg/time/#Now) function. Returns an instance of
+Golang [Time](https://golang.org/pkg/time/#Time).
 
 <hr>
 **`time.Parse(val string) Time`**
 
 Parses specified string using RFC3339 layout. Returns an instance of Golang [Time](https://golang.org/pkg/time/#Time).
 
 ### **strings**
+
 String related functions.
 
 <hr>
 **`strings.ReplaceAll() string`**
 
 Executes function built-in Golang [strings.ReplaceAll](https://pkg.go.dev/strings#ReplaceAll) function.
 
+<hr>
+**`strings.ToUpper() string`**
+
+Executes function built-in Golang [strings.ToUpper](https://pkg.go.dev/strings#ToUpper) function.
+
+<hr>
+**`strings.ToLower() string`**
+
+Executes function built-in Golang [strings.ToLower](https://pkg.go.dev/strings#ToLower) function.
+
 ### **sync**
 
 <hr>
@@ -28,6 +40,7 @@ Executes function built-in Golang [strings.ReplaceAll](https://pkg.go.dev/string
 Returns the `info` item value by given name stored in the Argo CD App sync operation.
 
 ### **repo**
+
 Functions that provide additional information about Application source repository.
 <hr>
 **`repo.RepoURLToHTTPS(url string) string`**
@@ -46,7 +59,7 @@ Returns commit metadata. The commit must belong to the application source reposi
 
 * `Message string` commit message
 * `Author string` - commit author
-* `Date time.Time` - commit creation date  
+* `Date time.Time` - commit creation date
 * `Tags []string` - Associated tags
 
 <hr>
@@ -56,15 +69,15 @@ Returns application details. `AppDetail` fields:
 
 * `Type string` - AppDetail type
 * `Helm HelmAppSpec` - Helm details
-  * Fields :
-    * `Name string`
-    * `ValueFiles []string`
-    * `Parameters []*v1alpha1.HelmParameter`
-    * `Values string`
-    * `FileParameters []*v1alpha1.HelmFileParameter`
-  * Methods :
-    * `GetParameterValueByName(Name string)` Retrieve value by name in Parameters field
-    * `GetFileParameterPathByName(Name string)` Retrieve path by name in FileParameters field
+    * Fields :
+        * `Name string`
+        * `ValueFiles []string`
+        * `Parameters []*v1alpha1.HelmParameter`
+        * `Values string`
+        * `FileParameters []*v1alpha1.HelmFileParameter`
+    * Methods :
+        * `GetParameterValueByName(Name string)` Retrieve value by name in Parameters field
+        * `GetFileParameterPathByName(Name string)` Retrieve path by name in FileParameters field
 * `Ksonnet *apiclient.KsonnetAppSpec` - Ksonnet details
 * `Kustomize *apiclient.KustomizeAppSpec` - Kustomize details
 * `Directory *apiclient.DirectoryAppSpec` - Directory details

expr/strings/strings.go

@@ -1,13 +1,25 @@
 package strings
 
-import "strings"
+import (
+	"strings"
+)
 
 func NewExprs() map[string]interface{} {
 	return map[string]interface{}{
 		"ReplaceAll": replaceAll,
+		"ToUpper":    toUpper,
+		"ToLower":    toLower,
 	}
 }
 
 func replaceAll(s, old, new string) string {
 	return strings.ReplaceAll(s, old, new)
 }
+
+func toUpper(s string) string {
+	return strings.ToUpper(s)
+}
+
+func toLower(s string) string {
+	return strings.ToLower(s)
+}

expr/strings/strings_test.go

@@ -1,6 +1,7 @@
 package strings
 
 import (
+	"fmt"
 	"testing"
 
 	"github.com/stretchr/testify/assert"
@@ -9,6 +10,8 @@ import (
 func TestNewExprs(t *testing.T) {
 	funcs := []string{
 		"ReplaceAll",
+		"ToUpper",
+		"ToLower",
 	}
 
 	for _, fn := range funcs {
@@ -17,3 +20,46 @@ func TestNewExprs(t *testing.T) {
 		assert.True(t, hasFunc)
 	}
 }
+
+func TestReplaceAll(t *testing.T) {
+	exprs := NewExprs()
+
+	input := "test_replace"
+	expected := "test=replace"
+	replaceAllFn, ok := exprs["ReplaceAll"].(func(s, old, new string) string)
+	assert.True(t, ok)
+
+	actual := replaceAllFn(input, "_", "=")
+	assert.Equal(t, expected, actual)
+}
+
+func TestUpperAndLower(t *testing.T) {
+	testCases := []struct {
+		fn       string
+		input    string
+		expected string
+	}{
+		{
+			fn:       "ToUpper",
+			input:    "test",
+			expected: "TEST",
+		},
+		{
+			fn:       "ToLower",
+			input:    "TEST",
+			expected: "test",
+		},
+	}
+	exprs := NewExprs()
+
+	for _, testCase := range testCases {
+		t.Run(fmt.Sprintf("With success case: Func: %s", testCase.fn), func(tc *testing.T) {
+			toUpperFn, ok := exprs[testCase.fn].(func(s string) string)
+			assert.True(t, ok)
+
+			actual := toUpperFn(testCase.input)
+			assert.Equal(t, testCase.expected, actual)
+		})
+	}
+
+}