feat(components/execd): add new api for context management

.github/workflows/execd-test.yml

@@ -33,10 +33,28 @@ jobs:
           #
           make multi-build
 
-      - name: Run tests
+      - name: Run tests with coverage
         run: |
           cd components/execd
-          make test
+          go test -v -coverpkg=./... -coverprofile=coverage.out -covermode=atomic ./pkg/...
+
+      - name: Calculate coverage and generate summary
+        id: coverage
+        run: |
+          cd components/execd
+          # Extract total coverage percentage
+          TOTAL_COVERAGE=$(go tool cover -func=coverage.out | grep total | awk '{print $3}')
+          echo "total_coverage=$TOTAL_COVERAGE" >> $GITHUB_OUTPUT
+
+          # Generate GitHub Actions job summary
+          echo "## 📊 execd Test Coverage Report" >> $GITHUB_STEP_SUMMARY
+          echo "" >> $GITHUB_STEP_SUMMARY
+          echo "**Total Line Coverage:** $TOTAL_COVERAGE" >> $GITHUB_STEP_SUMMARY
+          echo "" >> $GITHUB_STEP_SUMMARY
+          echo "Coverage report generated for commit \`${{ github.sha }}\`" >> $GITHUB_STEP_SUMMARY
+          echo "" >> $GITHUB_STEP_SUMMARY
+          echo "---" >> $GITHUB_STEP_SUMMARY
+          echo "*Coverage targets: Core packages >80%, API layer >70%*" >> $GITHUB_STEP_SUMMARY
 
   smoke:
     strategy:

components/execd/pkg/runtime/context.go

@@ -52,6 +52,7 @@ func (c *Controller) CreateContext(req *CreateContextRequest) (string, error) {
 	kernel := &jupyterKernel{
 		kernelID: session.Kernel.ID,
 		client:   client,
+		language: req.Language,
 	}
 	c.storeJupyterKernel(session.ID, kernel)
 
@@ -63,6 +64,62 @@ func (c *Controller) CreateContext(req *CreateContextRequest) (string, error) {
 	return session.ID, nil
 }
 
+func (c *Controller) DeleteContext(session string) error {
+	return c.deleteSessionAndCleanup(session)
+}
+
+func (c *Controller) ListContext(language string) ([]CodeContext, error) {
+	switch language {
+	case Command.String(), BackgroundCommand.String(), SQL.String():
+		return nil, fmt.Errorf("unsupported language context operation: %s", language)
+	case "":
+		return c.listAllContexts()
+	default:
+		return c.listLanguageContexts(Language(language))
+	}
+}
+
+func (c *Controller) DeleteLanguageContext(language Language) error {
+	contexts, err := c.listLanguageContexts(language)
+	if err != nil {
+		return err
+	}
+
+	seen := make(map[string]struct{})
+	for _, context := range contexts {
+		if _, ok := seen[context.ID]; ok {
+			continue
+		}
+		seen[context.ID] = struct{}{}
+
+		if err := c.deleteSessionAndCleanup(context.ID); err != nil {
+			return fmt.Errorf("error deleting context %s: %w", context.ID, err)
+		}
+	}
+	return nil
+}
+
+func (c *Controller) deleteSessionAndCleanup(session string) error {
+	if c.getJupyterKernel(session) == nil {
+		return ErrContextNotFound
+	}
+
+	if err := c.jupyterClient().DeleteSession(session); err != nil {
+		return err
+	}
+
+	c.mu.Lock()
+	defer c.mu.Unlock()
+
+	delete(c.jupyterClientMap, session)
+	for lang, id := range c.defaultLanguageJupyterSessions {
+		if id == session {
+			delete(c.defaultLanguageJupyterSessions, lang)
+		}
+	}
+	return nil
+}
+
 func (c *Controller) newContextID() string {
 	return strings.ReplaceAll(uuid.New().String(), "-", "")
 }
@@ -112,16 +169,7 @@ func (c *Controller) createDefaultLanguageContext(language Language) error {
 
 // createContext performs the actual context creation workflow.
 func (c *Controller) createContext(request CreateContextRequest) (*jupyter.Client, *jupytersession.Session, error) {
-	httpClient := &http.Client{
-		Transport: &jupyter.AuthTransport{
-			Token: c.token,
-			Base:  http.DefaultTransport,
-		},
-	}
-
-	client := jupyter.NewClient(c.baseURL,
-		jupyter.WithToken(c.token),
-		jupyter.WithHTTPClient(httpClient))
+	client := c.jupyterClient()
 
 	kernel, err := c.searchKernel(client, request.Language)
 	if err != nil {
@@ -165,3 +213,64 @@ func (c *Controller) storeJupyterKernel(sessionID string, kernel *jupyterKernel)
 
 	c.jupyterClientMap[sessionID] = kernel
 }
+
+func (c *Controller) jupyterClient() *jupyter.Client {
+	httpClient := &http.Client{
+		Transport: &jupyter.AuthTransport{
+			Token: c.token,
+			Base:  http.DefaultTransport,
+		},
+	}
+
+	return jupyter.NewClient(c.baseURL,
+		jupyter.WithToken(c.token),
+		jupyter.WithHTTPClient(httpClient))
+}
+
+func (c *Controller) listAllContexts() ([]CodeContext, error) {
+	c.mu.RLock()
+	defer c.mu.RUnlock()
+
+	var contexts []CodeContext
+	for session, kernel := range c.jupyterClientMap {
+		if kernel != nil {
+			contexts = append(contexts, CodeContext{
+				ID:       session,
+				Language: kernel.language,
+			})
+		}
+	}
+
+	for language, defaultContext := range c.defaultLanguageJupyterSessions {
+		contexts = append(contexts, CodeContext{
+			ID:       defaultContext,
+			Language: language,
+		})
+	}
+
+	return contexts, nil
+}
+
+func (c *Controller) listLanguageContexts(language Language) ([]CodeContext, error) {
+	c.mu.RLock()
+	defer c.mu.RUnlock()
+
+	var contexts []CodeContext
+	for session, kernel := range c.jupyterClientMap {
+		if kernel != nil && kernel.language == language {
+			contexts = append(contexts, CodeContext{
+				ID:       session,
+				Language: language,
+			})
+		}
+	}
+
+	if defaultContext := c.defaultLanguageJupyterSessions[language]; defaultContext != "" {
+		contexts = append(contexts, CodeContext{
+			ID:       defaultContext,
+			Language: language,
+		})
+	}
+
+	return contexts, nil
+}

components/execd/pkg/runtime/context_test.go

@@ -0,0 +1,189 @@
+// Copyright 2025 Alibaba Group Holding Ltd.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package runtime
+
+import (
+	"errors"
+	"net/http"
+	"net/http/httptest"
+	"os"
+	"path/filepath"
+	"strings"
+	"testing"
+)
+
+func TestListContextsAndNewIpynbPath(t *testing.T) {
+	c := NewController("http://example", "token")
+	c.jupyterClientMap["session-python"] = &jupyterKernel{language: Python}
+	c.defaultLanguageJupyterSessions[Go] = "session-go-default"
+
+	pyContexts, err := c.listLanguageContexts(Python)
+	if err != nil {
+		t.Fatalf("listLanguageContexts returned error: %v", err)
+	}
+	if len(pyContexts) != 1 || pyContexts[0].ID != "session-python" || pyContexts[0].Language != Python {
+		t.Fatalf("unexpected python contexts: %#v", pyContexts)
+	}
+
+	allContexts, err := c.listAllContexts()
+	if err != nil {
+		t.Fatalf("listAllContexts returned error: %v", err)
+	}
+	if len(allContexts) != 2 {
+		t.Fatalf("expected two contexts, got %d", len(allContexts))
+	}
+
+	tmpDir := filepath.Join(t.TempDir(), "nested")
+	path, err := c.newIpynbPath("abc123", tmpDir)
+	if err != nil {
+		t.Fatalf("newIpynbPath error: %v", err)
+	}
+	if _, statErr := os.Stat(tmpDir); statErr != nil {
+		t.Fatalf("expected directory to be created: %v", statErr)
+	}
+	expected := filepath.Join(tmpDir, "abc123.ipynb")
+	if path != expected {
+		t.Fatalf("unexpected ipynb path: got %s want %s", path, expected)
+	}
+}
+
+func TestNewContextID_UniqueAndLength(t *testing.T) {
+	c := NewController("", "")
+	id1 := c.newContextID()
+	id2 := c.newContextID()
+
+	if id1 == "" || id2 == "" {
+		t.Fatalf("expected non-empty ids")
+	}
+	if id1 == id2 {
+		t.Fatalf("expected unique ids, got identical: %s", id1)
+	}
+	if len(id1) != 32 || len(id2) != 32 {
+		t.Fatalf("expected 32-char ids, got %d and %d", len(id1), len(id2))
+	}
+}
+
+func TestNewIpynbPath_ErrorWhenCwdIsFile(t *testing.T) {
+	c := NewController("", "")
+	tmpFile := filepath.Join(t.TempDir(), "file.txt")
+	if err := os.WriteFile(tmpFile, []byte("x"), 0o644); err != nil {
+		t.Fatalf("prepare file: %v", err)
+	}
+
+	if _, err := c.newIpynbPath("abc", tmpFile); err == nil {
+		t.Fatalf("expected error when cwd is a file")
+	}
+}
+
+func TestListContextUnsupportedLanguage(t *testing.T) {
+	c := NewController("", "")
+	_, err := c.ListContext(Command.String())
+	if err == nil {
+		t.Fatalf("expected error for command language")
+	}
+	if _, err := c.ListContext(BackgroundCommand.String()); err == nil {
+		t.Fatalf("expected error for background-command language")
+	}
+	if _, err := c.ListContext(SQL.String()); err == nil {
+		t.Fatalf("expected error for sql language")
+	}
+}
+
+func TestDeleteContext_NotFound(t *testing.T) {
+	c := NewController("", "")
+	err := c.DeleteContext("missing")
+	if err == nil {
+		t.Fatalf("expected ErrContextNotFound")
+	}
+	if !errors.Is(err, ErrContextNotFound) {
+		t.Fatalf("unexpected error: %v", err)
+	}
+}
+
+func TestDeleteContext_RemovesCacheOnSuccess(t *testing.T) {
+	sessionID := "sess-123"
+
+	// mock jupyter server that accepts DELETE
+	server := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		if r.Method != http.MethodDelete {
+			t.Fatalf("unexpected method: %s", r.Method)
+		}
+		if !strings.HasSuffix(r.URL.Path, "/api/sessions/"+sessionID) {
+			t.Fatalf("unexpected path: %s", r.URL.Path)
+		}
+		w.WriteHeader(http.StatusNoContent)
+	}))
+	defer server.Close()
+
+	c := NewController(server.URL, "token")
+	c.jupyterClientMap[sessionID] = &jupyterKernel{language: Python}
+	c.defaultLanguageJupyterSessions[Python] = sessionID
+
+	if err := c.DeleteContext(sessionID); err != nil {
+		t.Fatalf("DeleteContext returned error: %v", err)
+	}
+
+	if kernel := c.getJupyterKernel(sessionID); kernel != nil {
+		t.Fatalf("expected cache to be cleared, found: %+v", kernel)
+	}
+	if _, ok := c.defaultLanguageJupyterSessions[Python]; ok {
+		t.Fatalf("expected default session entry to be removed")
+	}
+}
+
+func TestDeleteLanguageContext_RemovesCacheOnSuccess(t *testing.T) {
+	lang := Python
+	session1 := "sess-1"
+	session2 := "sess-2"
+
+	// mock jupyter server to accept two deletes
+	deleteCalls := make(map[string]int)
+	server := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		if r.Method != http.MethodDelete {
+			t.Fatalf("unexpected method: %s", r.Method)
+		}
+		if strings.Contains(r.URL.Path, session1) {
+			deleteCalls[session1]++
+		} else if strings.Contains(r.URL.Path, session2) {
+			deleteCalls[session2]++
+		} else {
+			t.Fatalf("unexpected path: %s", r.URL.Path)
+		}
+		w.WriteHeader(http.StatusNoContent)
+	}))
+	defer server.Close()
+
+	c := NewController(server.URL, "token")
+	c.jupyterClientMap[session1] = &jupyterKernel{language: lang}
+	c.jupyterClientMap[session2] = &jupyterKernel{language: lang}
+	c.defaultLanguageJupyterSessions[lang] = session2
+
+	if err := c.DeleteLanguageContext(lang); err != nil {
+		t.Fatalf("DeleteLanguageContext returned error: %v", err)
+	}
+
+	if _, ok := c.jupyterClientMap[session1]; ok {
+		t.Fatalf("expected session1 removed from cache")
+	}
+	if _, ok := c.jupyterClientMap[session2]; ok {
+		t.Fatalf("expected session2 removed from cache")
+	}
+	if _, ok := c.defaultLanguageJupyterSessions[lang]; ok {
+		t.Fatalf("expected default entry removed")
+	}
+	if deleteCalls[session1] != 1 || deleteCalls[session2] != 1 {
+		t.Fatalf("unexpected delete calls: %+v", deleteCalls)
+	}
+}

components/execd/pkg/runtime/ctrl.go

@@ -49,6 +49,7 @@ type jupyterKernel struct {
 	mu       sync.Mutex
 	kernelID string
 	client   *jupyter.Client
+	language Language
 }
 
 type commandKernel struct {