test: Add mock ghclient to TestCheckFile with dependency injection (#185)

Adds mock GitHub client initialization to TestCheckFile following the same pattern used in TestIsCodeRepo. This ensures consistency across the test suite by using dependency injection for the GitHub client.

Part of #184

Author: zohayb23

data/rest-data_test.go

@@ -65,7 +65,12 @@ func TestCheckFile(t *testing.T) {
 
 	for _, tt := range tests {
 		t.Run(tt.name, func(t *testing.T) {
+			mockClient := mock.NewMockedHTTPClient()
+			ghClient := github.NewClient(mockClient)
 			rest := &RestData{
+				ghClient: ghClient,
+				owner:    "test-owner",
+				repo:     "test-repo",
 				contents: RepoContent{
 					Content: tt.toplevel,
 					SubContent: map[string]RepoContent{