[Go] Verify content of Go server generated files (samples) (#19504)

* Add Python tests to verify generates Go files

* Run Python tests during CI

* Remove Python tests

* Add Go tests

* Update workflow to run Go tests

.github/workflows/samples-go.yaml

@@ -35,3 +35,27 @@ jobs:
       - name: Run test
         working-directory: ${{ matrix.sample }}
         run: go test -mod=mod -v
+
+  verify:
+    name: Verify generated Go files with Go tests
+    runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+      matrix:
+        sample:
+          - samples/server/petstore/go-api-server/
+        go-version:
+          - "1.18"
+    steps:
+      - uses: actions/checkout@v4
+      - name: Set up Go
+        uses: actions/setup-go@v3
+        with:
+          go-version: ${{ matrix.go-version }}
+      - name: Install Dependencies
+        working-directory: ${{ matrix.sample }}
+        run: |
+          go mod tidy
+      - name: Run tests
+        working-directory: ${{ matrix.sample }}
+        run: go test ./samples_tests -v

samples/server/petstore/go-api-server/samples_tests/README.md

@@ -0,0 +1,3 @@
+This folder contains the tests to verify the correctness of the generate samples
+
+Those tests are not generated by the OpenAPI Generator

samples/server/petstore/go-api-server/samples_tests/api_pet_test.go

@@ -0,0 +1,26 @@
+package main
+
+import (
+	"strings"
+	"testing"
+
+	"github.com/GIT_USER_ID/GIT_REPO_ID/samples_tests/utils"
+)
+
+func Test_API_Pet(t *testing.T) {
+
+	t.Run("Check DeletePet route exists", func(t *testing.T) {
+
+		filepath := "../go/api_pet.go"
+
+		expected := ("\t\t\"DeletePet\": Route{\n" +
+			"\t\t\tstrings.ToUpper(\"Delete\"),\n" +
+			"\t\t\t\"/v2/pet/{petId}\",\n" +
+			"\t\t\tc.DeletePet,\n" +
+			"\t\t}")
+
+		if !strings.Contains(utils.ReadContent(filepath), expected) {
+			t.Errorf("Route was not found in the file")
+		}
+	})
+}

samples/server/petstore/go-api-server/samples_tests/go_mod_test.go

@@ -0,0 +1,35 @@
+package main
+
+import (
+	"testing"
+
+	"github.com/GIT_USER_ID/GIT_REPO_ID/samples_tests/utils"
+)
+
+func Test_Go_Mod(t *testing.T) {
+
+	t.Run("Check module", func(t *testing.T) {
+
+		filepath := "../go.mod"
+
+		lines := utils.ReadLines(filepath)
+		expected := "module github.com/GIT_USER_ID/GIT_REPO_ID"
+
+		if lines[0] != expected {
+			t.Errorf("Expected '%s', but got '%s'", expected, lines[0])
+		}
+	})
+
+	t.Run("Check Go version", func(t *testing.T) {
+
+		filepath := "../go.mod"
+
+		lines := utils.ReadLines(filepath)
+		expected := "go 1.18"
+
+		if lines[2] != expected {
+			t.Errorf("Expected '%s', but got '%s'", expected, lines[2])
+		}
+	})
+
+}

samples/server/petstore/go-api-server/samples_tests/model_pet_test.go

@@ -0,0 +1,22 @@
+package main
+
+import (
+	"testing"
+
+	"github.com/GIT_USER_ID/GIT_REPO_ID/samples_tests/utils"
+)
+
+func Test_Model_Pet(t *testing.T) {
+
+	t.Run("Check Pet model exists", func(t *testing.T) {
+
+		filepath := "../go/model_pet.go"
+
+		lines := utils.ReadLines(filepath)
+		expected := "\tId int64 `json:\"id,omitempty\"`"
+
+		if lines[18] != expected {
+			t.Errorf("Expected  '%s', but got '%s'", expected, lines[18])
+		}
+	})
+}

samples/server/petstore/go-api-server/samples_tests/routers_test.go

@@ -0,0 +1,38 @@
+package main
+
+import (
+	"testing"
+	"strings"
+
+	"github.com/GIT_USER_ID/GIT_REPO_ID/samples_tests/utils"
+)
+
+func Test_Routers(t *testing.T) {
+
+	t.Run("Check struct Route exists", func(t *testing.T) {
+
+		filepath := "../go/routers.go"
+
+		expected := ("type Route struct {\n" +
+			"\tMethod\t  string\n" +
+			"\tPattern\t string\n" +
+			"\tHandlerFunc http.HandlerFunc\n" +
+			"}")
+
+		if !strings.Contains(utils.ReadContent(filepath), expected) {
+			t.Errorf("Type Route was not found in the file")
+		}
+	})
+
+	t.Run("Check map Routes exists", func(t *testing.T) {
+
+		filepath := "../go/routers.go"
+
+		lines := utils.ReadLines(filepath)
+		expected := "type Routes map[string]Route"
+
+		if lines[34] != expected {
+			t.Errorf("Expected '%s', but got '%s'", expected, lines[34])
+		}
+	})
+}

samples/server/petstore/go-api-server/samples_tests/utils/fileutils.go

@@ -0,0 +1,51 @@
+package utils
+
+import (
+	"bufio"
+	"os"
+	"strings"
+)
+
+// Load file content as array of lines
+func ReadLines(filePath string) ([]string) {
+	var lines []string
+
+	file, err := os.Open(filePath)
+	if err != nil {
+		panic("Cannot open file " + filePath);
+	}
+	defer file.Close()
+
+	scanner := bufio.NewScanner(file)
+	for scanner.Scan() {
+		lines = append(lines, scanner.Text())
+	}
+
+	if err := scanner.Err(); err != nil {
+		panic("Cannot scan file " + filePath);
+	}
+
+	return lines
+}
+
+// Load file content as string
+func ReadContent(filePath string) (string) {
+	file, err := os.Open(filePath)
+	if err != nil {
+		panic("Cannot open file " + filePath);
+	}
+	defer file.Close()
+
+	var contentBuilder strings.Builder
+	scanner := bufio.NewScanner(file)
+
+	for scanner.Scan() {
+		contentBuilder.WriteString(scanner.Text() + "\n")
+	}
+
+	if err := scanner.Err(); err != nil {
+		panic("Cannot scan file " + filePath);
+	}
+
+	return contentBuilder.String()
+}