test: extend cloud, config, and image package test coverage#138
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- cloud: Add CloudsYamlPaths tests, invalid/empty YAML, precedence verification (8 new tests covering path resolution, invalid YAML, detailed clouds.yaml parsing) - config: Add edge case tests for empty/malformed files, partial configs, SaveTo directory creation, keybinding merging, round-trip verification (10 new tests covering validation, merge behavior, partial config handling) - image: Add ProgressReader tests (concurrent access, large data, empty reader) and imageFromGophercloud conversion tests (empty, queued, visibility modes) (12 new tests) Total: 30 new tests, all passing. Test file count: 22 → 23. Packages tested expanded from 15 → 16 (added internal/image).
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Pull request overview
This PR extends unit test coverage across the internal cloud, config, and image packages, adding a substantial number of new tests to validate parsing, defaults/merging behavior, and data mapping helpers.
Changes:
- Added additional
clouds.yamlpath and parsing tests forcloud.ListCloudNames/cloud.CloudsYamlPaths. - Expanded
configtests to cover empty/malformed files, partial merges, CLI-flag merges, and Save/Load round-trips. - Introduced first-time tests for
image.ProgressReaderandimageFromGophercloudfield mapping.
Reviewed changes
Copilot reviewed 3 out of 3 changed files in this pull request and generated 3 comments.
| File | Description |
|---|---|
| src/internal/cloud/clouds_test.go | Adds coverage for clouds.yaml search path ordering and additional ListCloudNames edge cases. |
| src/internal/config/config_test.go | Adds coverage for config file parsing/merging behaviors and save/round-trip behavior. |
| src/internal/image/images_test.go | Adds coverage for ProgressReader byte tracking and imageFromGophercloud mapping. |
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| func TestListCloudNames_InvalidYAML(t *testing.T) { | ||
| dir := t.TempDir() | ||
| content := `clouds: | ||
| bad: | ||
| [invalid yaml {{{ | ||
| ` | ||
| path := filepath.Join(dir, "clouds.yaml") | ||
| if err := os.WriteFile(path, []byte(content), 0644); err != nil { | ||
| t.Fatal(err) | ||
| } | ||
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| t.Setenv("OS_CLIENT_CONFIG_FILE", path) | ||
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| _, err := ListCloudNames() |
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These ListCloudNames tests can become flaky if the process working directory contains a real clouds.yaml (e.g., a developer has one in the repo root). ListCloudNames() searches clouds.yaml in the current directory before OS_CLIENT_CONFIG_FILE, so the test may read the wrong file. Consider os.Chdir(t.TempDir()) (and defer restore) like TestListCloudNames_NoFile does to isolate the current-directory lookup for this test (and similar ones below).
| func TestEmptyConfigFile(t *testing.T) { | ||
| dir := t.TempDir() | ||
| path := filepath.Join(dir, "config.yaml") | ||
| os.WriteFile(path, []byte(""), 0o644) | ||
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| loaded, err := LoadFrom(path) |
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os.WriteFile errors are ignored here. If the write fails, LoadFrom may fall back to defaults and this test could pass while silently not exercising the file-reading path. Please handle the returned error (and fail the test) to avoid false positives.
| // Verify content is valid YAML | ||
| data, err := os.ReadFile(path) | ||
| if err != nil { | ||
| t.Fatalf("Read file: %v", err) | ||
| } | ||
| if len(data) == 0 { | ||
| t.Error("file is empty") |
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The comment says this verifies the saved content is valid YAML, but the test only checks that the file is non-empty. Either unmarshal the bytes to confirm it parses as YAML (and ideally into the expected config struct), or adjust the comment to match what is actually being asserted.
Summary
Extended test coverage across 3 core packages with 30 new tests.
cloud/clouds_test.go (+8 tests, was 3 → now 11)
TestCloudsYamlPaths_Order- validates search path priority orderTestCloudsYamlPaths_WithEnv/TestCloudsYamlPaths_WithoutEnv- env var handlingTestListCloudNames_InvalidYAML- malformed YAML error handlingTestListCloudNames_NoCloudsKey- missing clouds key returns empty listTestListCloudNames_EmptyFile- empty file handlingTestListCloudNames_Precedence- OS_CLIENT_CONFIG_FILE takes precedenceTestListCloudNames_DetailedCloudsYaml- multi-cloud YAML with full auth fieldsconfig/config_test.go (+10 tests, was 7 → now 17)
TestEmptyConfigFile- empty file returns defaultsTestMalformedYAMLConfig- invalid YAML returns errorTestPartialConfigOnlyColors- partial config fills missing sections from defaultsTestPartialConfigOnlyKeybindings- keybinding-only config properly mergedTestSaveToCreatesParentDirectories- nested directory creationTestKeybindingsEmptyMap- empty map filled from defaultsTestConfigWithOnlyGeneralSection- general-only config with full color/keybinding defaultsTestMergeAllCLIFlags- all CLI flag override combinationsTestSaveAndRoundTrip- write then read then verify all fields preservedimage/images_test.go (+12 tests, was 0 → now 12)
TestProgressReader- basic read, data chunks, tracking accuracyTestProgressReader_LargeData- 10KB data with small buffer chunksTestProgressReader_ZeroBytesRead- empty reader edge caseTestProgressReader_ConcurrentAccess- goroutine safety verificationTestImageFromGophercloud- full field mapping validationTestImageFromGophercloud_Empty- zero-value structTestImageFromGophercloud_Queued/Private/Shared/CommunityVisibility- status and visibility coverageResults