ci: update Go version requirements and remove test files (#3957)

- Update the Go version requirements in `.github/workflows/gin.yml`
- Remove test files for Go versions 1.18 and 1.19
- Update the required Go version in `debug.go` and `debug_test.go`
- Rename and modify files related to Go version 1.19 and 1.20 in the `internal/bytesconv` directory

Signed-off-by: Bo-Yi Wu <appleboy.tw@gmail.com>

.github/workflows/gin.yml

@@ -34,7 +34,7 @@ jobs:
     strategy:
       matrix:
         os: [ubuntu-latest, macos-latest]
-        go: ["1.18", "1.19", "1.20", "1.21", "1.22"]
+        go: ["1.20", "1.21", "1.22"]
         test-tags:
           ["", "-tags nomsgpack", '-tags "sonic avx"', "-tags go_json", "-race"]
         include:

context_test.go

@@ -90,6 +90,19 @@ func TestContextFormFile(t *testing.T) {
 	assert.NoError(t, c.SaveUploadedFile(f, "test"))
 }
 
+func TestContextFormFileFailed(t *testing.T) {
+	buf := new(bytes.Buffer)
+	mw := multipart.NewWriter(buf)
+	mw.Close()
+	c, _ := CreateTestContext(httptest.NewRecorder())
+	c.Request, _ = http.NewRequest("POST", "/", nil)
+	c.Request.Header.Set("Content-Type", mw.FormDataContentType())
+	c.engine.MaxMultipartMemory = 8 << 20
+	f, err := c.FormFile("file")
+	assert.Error(t, err)
+	assert.Nil(t, f)
+}
+
 func TestContextMultipartForm(t *testing.T) {
 	buf := new(bytes.Buffer)
 	mw := multipart.NewWriter(buf)

debug.go

@@ -78,7 +78,7 @@ func getMinVer(v string) (uint64, error) {
 
 func debugPrintWARNINGDefault() {
 	if v, e := getMinVer(runtime.Version()); e == nil && v < ginSupportMinGoVer {
-		debugPrint(`[WARNING] Now Gin requires Go 1.18+.
+		debugPrint(`[WARNING] Now Gin requires Go 1.20+.
 
 `)
 	}

debug_test.go

@@ -104,7 +104,7 @@ func TestDebugPrintWARNINGDefault(t *testing.T) {
 	})
 	m, e := getMinVer(runtime.Version())
 	if e == nil && m < ginSupportMinGoVer {
-		assert.Equal(t, "[GIN-debug] [WARNING] Now Gin requires Go 1.18+.\n\n[GIN-debug] [WARNING] Creating an Engine instance with the Logger and Recovery middleware already attached.\n\n", re)
+		assert.Equal(t, "[GIN-debug] [WARNING] Now Gin requires Go 1.20+.\n\n[GIN-debug] [WARNING] Creating an Engine instance with the Logger and Recovery middleware already attached.\n\n", re)
 	} else {
 		assert.Equal(t, "[GIN-debug] [WARNING] Creating an Engine instance with the Logger and Recovery middleware already attached.\n\n", re)
 	}

internal/bytesconv/bytesconv_1.20.go → internal/bytesconv/bytesconv.go

@@ -2,8 +2,6 @@
 // Use of this source code is governed by a MIT style
 // license that can be found in the LICENSE file.
 
-//go:build go1.20
-
 package bytesconv
 
 import (