test: expand coverage for parsers, models, and service internals

[ya-luotao]

Broaden the suite from ~131 to 278 examples, targeting units that
previously had no direct specs:

• DockerfileParser instruction translation (FROM/RUN/COPY/ENV/CMD, multi-stage
  rejection, line continuations, user/workdir defaults)
• Response models: ProcessResult, SandboxInfo, EntryInfo/FilesystemEvent, and
  the template/build models (from_hash key normalization, enum mapping)
• Configuration env-var precedence and validation
• SandboxHelpers credential/lifecycle/template resolution and envd-version guard
• Sandbox/Snapshot paginators (token termination, metadata encoding)
• Error hierarchy and CommandExitError message building
• WatchHandle, ReadyCmd, DefaultBuildLogger
• BaseService auth-header/version helpers and EnvdHttpClient error mapping
• LiveStreamable pid extraction; CommandHandle synchronous/error/disconnect paths

Also wire in opt-in SimpleCov (COVERAGE=true) with branch coverage and a
minimum-coverage gate in spec_helper. Baseline ~82% line / ~60% branch.

https://claude.ai/code/session_01CA6xkCPou4FqQPfFkQVGDz

[Copilot]

Pull request overview

This PR substantially expands the SDK’s spec coverage across parsers, models, and service internals, while also adding optional SimpleCov instrumentation and tightening a small edge-case in ProcessResult.from_connect_response to avoid crashes on invalid inputs.

Changes:

• Add opt-in SimpleCov (via COVERAGE=true) with branch coverage and a minimum coverage gate.
• Add/expand unit specs for parsers, models, error classes, and service helper internals (paginators, auth helpers, event streaming, etc.).
• Fix E2B::Models::ProcessResult.from_connect_response to return an empty successful result for non-Hash input instead of raising.

Reviewed changes

Copilot reviewed 22 out of 22 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
spec/spec_helper.rb	Adds opt-in SimpleCov startup and minimum coverage thresholds before requiring e2b.
spec/e2b/template_spec.rb	Tightens error message assertions to exact substring checks.
spec/e2b/template_logger_spec.rb	Adds unit coverage for DefaultBuildLogger and E2B.default_build_logger.
spec/e2b/services/watch_handle_spec.rb	Adds coverage for polling/stop behavior and RPC parameter passing.
spec/e2b/services/live_streamable_spec.rb	Adds coverage for PID extraction and disconnect behavior.
spec/e2b/services/envd_http_client_spec.rb	Adds coverage for RpcResponse#success? and error/message mapping.
spec/e2b/services/command_handle_spec.rb	Adds coverage for delegation, materialized results, exit parsing, and disconnect semantics.
spec/e2b/services/base_service_spec.rb	Adds coverage for auth header/user resolution and envd-version gates.
spec/e2b/sandbox_helpers_spec.rb	Adds coverage for credential/domain/template/lifecycle helpers and envd-version guard.
spec/e2b/ready_cmd_spec.rb	Adds coverage for ready command builders and timeout clamping.
spec/e2b/paginator_spec.rb	Adds coverage for paginator token termination and query encoding.
spec/e2b/models/template_models_spec.rb	Adds coverage for template/build model from_hash normalization and parsing.
spec/e2b/models/sandbox_info_spec.rb	Adds coverage for key mapping, time parsing, and helper methods.
spec/e2b/models/process_result_spec.rb	Adds coverage for parsing, streaming accumulation, exit parsing, and non-Hash input behavior.
spec/e2b/models/entry_info_spec.rb	Adds coverage for enum mapping and timestamp parsing for entry/filesystem models.
spec/e2b/errors_spec.rb	Adds coverage for error hierarchy, metadata fields, and CommandExitError messages.
spec/e2b/dockerfile_parser_spec.rb	Adds coverage for Dockerfile instruction translation and constraints (incl. multi-stage rejection).
spec/e2b/configuration_spec.rb	Adds coverage for env-var precedence, defaults, debug mode, and validation.
lib/e2b/models/process_result.rb	Fixes from_connect_response to safely handle non-Hash input by returning an empty result.
e2b.gemspec	Adds simplecov as a development dependency.
CLAUDE.md	Documents running specs with coverage enabled and the coverage floor.
CHANGELOG.md	Notes the ProcessResult.from_connect_response fix and internal test/coverage additions.

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