Gen Test

File Placement

• Place test files in the same directory as the source file
• Name: <source_file>_test.go (or append to existing test file if one exists)

What to Test

For handlers (server/handlers/):

• HTTP status codes for valid and invalid requests
• Response body structure
• Authentication/authorization checks (if applicable)
• Input validation errors

For models (server/models/):

• Struct method behavior
• Serialization/deserialization
• Validation logic

For mesheryctl commands (mesheryctl/):

• Command output for various flag combinations
• Error messages for invalid input
• Exit codes

Example Pattern

func TestHandlerName(t *testing.T) {
    tests := []struct {
        name           string
        method         string
        path           string
        body           string
        expectedStatus int
    }{
        {
            name:           "valid request",
            method:         http.MethodGet,
            path:           "/api/resource",
            expectedStatus: http.StatusOK,
        },
        {
            name:           "missing required field",
            method:         http.MethodPost,
            path:           "/api/resource",
            body:           `{}`,
            expectedStatus: http.StatusBadRequest,
        },
    }

    for _, tt := range tests {
        t.Run(tt.name, func(t *testing.T) {
            req := httptest.NewRequest(tt.method, tt.path, strings.NewReader(tt.body))
            rec := httptest.NewRecorder()

            handler.ServeHTTP(rec, req)

            if rec.Code != tt.expectedStatus {
                t.Errorf("expected status %d, got %d", tt.expectedStatus, rec.Code)
            }
        })
    }
}