Migrate GitHub REST tests to internal testify-based mock helper

Co-authored-by: JoannaaKL <67866556+JoannaaKL@users.noreply.github.com>

Author: Copilot

docs/testing.md

@@ -7,7 +7,7 @@ This project uses a combination of unit tests and end-to-end (e2e) tests to ensu
 - Unit tests are located alongside implementation, with filenames ending in `_test.go`.
 - Currently the preference is to use internal tests i.e. test files do not have `_test` package suffix.
 - Tests use [testify](https://github.com/stretchr/testify) for assertions and require statements. Use `require` when continuing the test is not meaningful, for example it is almost never correct to continue after an error expectation.
-- Mocking is performed using [go-github-mock](https://github.com/migueleliasweb/go-github-mock) or `githubv4mock` for simulating GitHub rest and GQL API responses.
+- REST mocking in unit tests is performed with the internal `pkg/testmock` helpers (built on `net/http` and testify assertions) or `githubv4mock` for simulating GitHub REST and GQL API responses.
 - Each tool's schema is snapshotted and checked for changes using the `toolsnaps` utility (see below).
 - Tests are designed to be explicit and verbose to aid maintainability and clarity.
 - Handler unit tests should take the form of:

pkg/github/helper_test.go

@@ -59,7 +59,7 @@ const (
 	PatchReposIssuesByOwnerByRepoByIssueNumber                  = "PATCH /repos/{owner}/{repo}/issues/{issue_number}"
 	GetReposIssuesSubIssuesByOwnerByRepoByIssueNumber           = "GET /repos/{owner}/{repo}/issues/{issue_number}/sub_issues"
 	PostReposIssuesSubIssuesByOwnerByRepoByIssueNumber          = "POST /repos/{owner}/{repo}/issues/{issue_number}/sub_issues"
-	DeleteReposIssuesSubIssueByOwnerByRepoByIssueNumber         = "DELETE /repos/{owner}/{repo}/issues/{issue_number}/sub_issues"
+	DeleteReposIssuesSubIssueByOwnerByRepoByIssueNumber         = "DELETE /repos/{owner}/{repo}/issues/{issue_number}/sub_issue"
 	PatchReposIssuesSubIssuesPriorityByOwnerByRepoByIssueNumber = "PATCH /repos/{owner}/{repo}/issues/{issue_number}/sub_issues/priority"
 
 	// Pull request endpoints

pkg/github/issues_test.go

@@ -14,10 +14,10 @@ import (
 	"github.com/github/github-mcp-server/internal/githubv4mock"
 	"github.com/github/github-mcp-server/internal/toolsnaps"
 	"github.com/github/github-mcp-server/pkg/lockdown"
+	mock "github.com/github/github-mcp-server/pkg/testmock"
 	"github.com/github/github-mcp-server/pkg/translations"
 	"github.com/google/go-github/v79/github"
 	"github.com/google/jsonschema-go/jsonschema"
-	"github.com/migueleliasweb/go-github-mock/src/mock"
 	"github.com/shurcooL/githubv4"
 	"github.com/stretchr/testify/assert"
 	"github.com/stretchr/testify/require"

pkg/github/projects_test.go

@@ -8,10 +8,10 @@ import (
 	"testing"
 
 	"github.com/github/github-mcp-server/internal/toolsnaps"
+	mock "github.com/github/github-mcp-server/pkg/testmock"
 	"github.com/github/github-mcp-server/pkg/translations"
 	gh "github.com/google/go-github/v79/github"
 	"github.com/google/jsonschema-go/jsonschema"
-	"github.com/migueleliasweb/go-github-mock/src/mock"
 	"github.com/stretchr/testify/assert"
 	"github.com/stretchr/testify/require"
 )

pkg/github/pullrequests_test.go

@@ -15,7 +15,7 @@ import (
 	"github.com/google/jsonschema-go/jsonschema"
 	"github.com/shurcooL/githubv4"
 
-	"github.com/migueleliasweb/go-github-mock/src/mock"
+	mock "github.com/github/github-mcp-server/pkg/testmock"
 	"github.com/stretchr/testify/assert"
 	"github.com/stretchr/testify/require"
 )

pkg/github/repositories_test.go

@@ -11,11 +11,11 @@ import (
 
 	"github.com/github/github-mcp-server/internal/toolsnaps"
 	"github.com/github/github-mcp-server/pkg/raw"
+	mock "github.com/github/github-mcp-server/pkg/testmock"
 	"github.com/github/github-mcp-server/pkg/translations"
 	"github.com/github/github-mcp-server/pkg/utils"
 	"github.com/google/go-github/v79/github"
 	"github.com/google/jsonschema-go/jsonschema"
-	"github.com/migueleliasweb/go-github-mock/src/mock"
 	"github.com/modelcontextprotocol/go-sdk/mcp"
 	"github.com/stretchr/testify/assert"
 	"github.com/stretchr/testify/require"
@@ -306,11 +306,12 @@ func Test_GetFileContents(t *testing.T) {
 					http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
 						// Request for "refs/heads/main" -> 404 (doesn't exist)
 						// Request for "refs/heads/develop" (default branch) -> 200
+						path := r.URL.EscapedPath()
 						switch {
-						case strings.Contains(r.URL.Path, "heads/main"):
+						case strings.Contains(path, "heads/main") || strings.Contains(path, "heads%2Fmain"):
 							w.WriteHeader(http.StatusNotFound)
 							_, _ = w.Write([]byte(`{"message": "Not Found"}`))
-						case strings.Contains(r.URL.Path, "heads/develop"):
+						case strings.Contains(path, "heads/develop") || strings.Contains(path, "heads%2Fdevelop"):
 							w.WriteHeader(http.StatusOK)
 							_, _ = w.Write([]byte(`{"ref": "refs/heads/develop", "object": {"sha": "abc123def456"}}`))
 						default:

pkg/github/search_test.go

@@ -7,10 +7,10 @@ import (
 	"testing"
 
 	"github.com/github/github-mcp-server/internal/toolsnaps"
+	mock "github.com/github/github-mcp-server/pkg/testmock"
 	"github.com/github/github-mcp-server/pkg/translations"
 	"github.com/google/go-github/v79/github"
 	"github.com/google/jsonschema-go/jsonschema"
-	"github.com/migueleliasweb/go-github-mock/src/mock"
 	"github.com/stretchr/testify/assert"
 	"github.com/stretchr/testify/require"
 )

pkg/raw/raw_mock.go

@@ -1,20 +1,20 @@
 package raw
 
-import "github.com/migueleliasweb/go-github-mock/src/mock"
+import "github.com/github/github-mcp-server/pkg/testmock"
 
-var GetRawReposContentsByOwnerByRepoByPath mock.EndpointPattern = mock.EndpointPattern{
+var GetRawReposContentsByOwnerByRepoByPath = testmock.EndpointPattern{
 	Pattern: "/{owner}/{repo}/HEAD/{path:.*}",
 	Method:  "GET",
 }
-var GetRawReposContentsByOwnerByRepoByBranchByPath mock.EndpointPattern = mock.EndpointPattern{
+var GetRawReposContentsByOwnerByRepoByBranchByPath = testmock.EndpointPattern{
 	Pattern: "/{owner}/{repo}/refs/heads/{branch}/{path:.*}",
 	Method:  "GET",
 }
-var GetRawReposContentsByOwnerByRepoByTagByPath mock.EndpointPattern = mock.EndpointPattern{
+var GetRawReposContentsByOwnerByRepoByTagByPath = testmock.EndpointPattern{
 	Pattern: "/{owner}/{repo}/refs/tags/{tag}/{path:.*}",
 	Method:  "GET",
 }
-var GetRawReposContentsByOwnerByRepoBySHAByPath mock.EndpointPattern = mock.EndpointPattern{
+var GetRawReposContentsByOwnerByRepoBySHAByPath = testmock.EndpointPattern{
 	Pattern: "/{owner}/{repo}/{sha}/{path:.*}",
 	Method:  "GET",
 }