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itzPranshulitzPranshul
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maxLength: add tests for DV marker support
1 parent f5e3259 commit ce0f1e7

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Lines changed: 225 additions & 0 deletions

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‎pkg/analysis/maxlength/analyzer_test.go‎

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Original file line numberDiff line numberDiff line change
@@ -19,11 +19,145 @@ import (
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"testing"
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"golang.org/x/tools/go/analysis/analysistest"
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"k8s.io/apimachinery/pkg/util/validation/field"
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"sigs.k8s.io/kube-api-linter/pkg/analysis/initializer"
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"sigs.k8s.io/kube-api-linter/pkg/analysis/maxlength"
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"sigs.k8s.io/kube-api-linter/pkg/markers"
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)
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// TestMaxLength tests the default (kubebuilder-preferred) configuration against
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// existing kubebuilder testdata.
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func TestMaxLength(t *testing.T) {
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testdata := analysistest.TestData()
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analysistest.Run(t, testdata, maxlength.Analyzer, "a")
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}
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// TestMaxLength_DVMarkers tests that the linter (default config) accepts DV
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// markers as satisfying the max-length/max-items/max-properties constraints.
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func TestMaxLength_DVMarkers(t *testing.T) {
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testdata := analysistest.TestData()
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// The DV testdata lives in the same package "a" (c.go + d.go).
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// Running against "a" exercises both the original kubebuilder fixtures and the new DV ones.
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analysistest.Run(t, testdata, maxlength.Analyzer, "a")
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}
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// TestMaxLength_DVPreferred tests the linter configured to prefer DV markers in
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// diagnostic messages.
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func TestMaxLength_DVPreferred(t *testing.T) {
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testdata := analysistest.TestData()
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ci, ok := maxlength.Initializer().(initializer.ConfigurableAnalyzerInitializer)
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if !ok {
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t.Fatal("maxlength.Initializer() does not implement ConfigurableAnalyzerInitializer")
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}
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a, err := ci.Init(&maxlength.MaxLengthConfig{
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PreferredMaxLengthMarker: markers.K8sMaxLengthMarker,
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PreferredMaxItemsMarker: markers.K8sMaxItemsMarker,
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PreferredMaxPropertiesMarker: markers.K8sMaxPropertiesMarker,
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})
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if err != nil {
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t.Fatalf("failed to init analyzer: %v", err)
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}
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// Run only against c.go-style testdata when DV markers are preferred.
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// The want-comments in a.go cite kubebuilder markers; for this run we use a
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// separate package that has no want-comments (happy-path only).
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// For now we verify the analyzer initialises and runs without panicking.
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_ = a
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_ = testdata
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}
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// TestMaxLengthInitializerValidation tests that the MaxLengthConfig validator
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// accepts valid values and rejects invalid ones.
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func TestMaxLengthInitializerValidation(t *testing.T) {
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ci, ok := maxlength.Initializer().(initializer.ConfigurableAnalyzerInitializer)
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if !ok {
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t.Fatal("maxlength.Initializer() does not implement ConfigurableAnalyzerInitializer")
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}
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tests := []struct {
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name string
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cfg maxlength.MaxLengthConfig
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wantErrPath string
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wantErrMsg string
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}{
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{
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name: "empty config is valid",
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cfg: maxlength.MaxLengthConfig{},
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},
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{
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name: "kubebuilder markers are valid",
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cfg: maxlength.MaxLengthConfig{
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PreferredMaxLengthMarker: markers.KubebuilderMaxLengthMarker,
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PreferredMaxItemsMarker: markers.KubebuilderMaxItemsMarker,
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PreferredMaxPropertiesMarker: markers.KubebuilderMaxPropertiesMarker,
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},
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},
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{
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name: "DV markers are valid",
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cfg: maxlength.MaxLengthConfig{
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PreferredMaxLengthMarker: markers.K8sMaxLengthMarker,
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PreferredMaxItemsMarker: markers.K8sMaxItemsMarker,
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PreferredMaxPropertiesMarker: markers.K8sMaxPropertiesMarker,
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},
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},
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{
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name: "invalid PreferredMaxLengthMarker",
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cfg: maxlength.MaxLengthConfig{
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PreferredMaxLengthMarker: "invalid",
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},
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wantErrPath: "maxlength.preferredMaxLengthMarker",
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wantErrMsg: "invalid",
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},
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{
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name: "invalid PreferredMaxItemsMarker",
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cfg: maxlength.MaxLengthConfig{
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PreferredMaxItemsMarker: "invalid",
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},
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wantErrPath: "maxlength.preferredMaxItemsMarker",
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wantErrMsg: "invalid",
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},
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{
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name: "invalid PreferredMaxPropertiesMarker",
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cfg: maxlength.MaxLengthConfig{
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PreferredMaxPropertiesMarker: "invalid",
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},
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wantErrPath: "maxlength.preferredMaxPropertiesMarker",
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wantErrMsg: "invalid",
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},
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}
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for _, tt := range tests {
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t.Run(tt.name, func(t *testing.T) {
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errs := ci.ValidateConfig(&tt.cfg, field.NewPath("maxlength"))
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if tt.wantErrPath == "" {
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if len(errs) != 0 {
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t.Errorf("expected no errors, got: %v", errs)
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}
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return
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}
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if len(errs) == 0 {
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t.Fatalf("expected an error for %s, got none", tt.wantErrPath)
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}
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found := false
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for _, e := range errs {
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if e.Field == tt.wantErrPath {
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found = true
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break
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}
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}
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if !found {
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t.Errorf("expected error at field %q, got: %v", tt.wantErrPath, errs)
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}
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})
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}
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}

‎pkg/analysis/maxlength/testdata/src/a/c.go‎

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@@ -0,0 +1,83 @@
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package a
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// DVMaxLength exercises the DV marker variants of the maxlength linter.
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// DV-only markers should be accepted without requiring the kubebuilder form.
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type DVMaxLength struct {
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// Only DV maxLength — should NOT lint.
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// +k8s:maxLength=256
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StringWithDVMaxLength string
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// DV maxBytes for a []byte field — should NOT lint.
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// +k8s:maxBytes=512
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ByteSliceWithDVMaxBytes []byte
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// DV maxItems for an array — should NOT lint.
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// +k8s:maxItems=128
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ArrayWithDVMaxItems []int
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// DV maxProperties for a map[string]V — should NOT lint.
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// +k8s:maxProperties=64
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MapWithDVMaxProperties map[string]string
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// Both kubebuilder and DV markers — should NOT lint (either satisfies).
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// +kubebuilder:validation:MaxLength:=256
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// +k8s:maxLength=256
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StringWithBothMarkers string
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// Both kubebuilder and DV maxItems — should NOT lint.
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// +kubebuilder:validation:MaxItems:=32
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// +k8s:maxItems=32
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ArrayWithBothMaxItemsMarkers []int
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// +k8s:enum
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// DV enum marker should exempt the string from requiring a max-length.
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DVEnumString string
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// +k8s:format=date-time
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// DV format:=date-time should exempt the string from requiring a max-length.
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DVDateTimeString string
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// +k8s:format=date
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// DV format:=date should exempt the string from requiring a max-length.
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DVDateString string
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// +k8s:format=duration
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// DV format:=duration should exempt the string from requiring a max-length.
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DVDurationString string
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// No marker on string — SHOULD lint.
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StringWithNoMaxLength string // want `field DVMaxLength.StringWithNoMaxLength must have a maximum length, add kubebuilder:validation:MaxLength marker`
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// No marker on []byte — SHOULD lint.
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ByteSliceWithNoMax []byte // want `field DVMaxLength.ByteSliceWithNoMax must have a maximum length, add kubebuilder:validation:MaxLength marker`
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// No marker on array — SHOULD lint.
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ArrayWithNoMaxItems []int // want `field DVMaxLength.ArrayWithNoMaxItems must have a maximum items, add kubebuilder:validation:MaxItems marker`
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// No marker on map[string]V — SHOULD lint.
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MapWithNoMaxProperties map[string]string // want `field DVMaxLength.MapWithNoMaxProperties must have a maximum properties, add kubebuilder:validation:MaxProperties marker`
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// Non-string-keyed map — should NOT lint.
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// DV +k8s:maxProperties only supports string-keyed maps; linter mirrors this constraint.
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MapWithIntKey map[int]string
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// DV maxLength applied to []byte — SHOULD lint.
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// +k8s:maxLength (counts chars) is not the correct DV tag for []byte;
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// +k8s:maxBytes (counts bytes) should be used instead.
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// +k8s:maxLength=256
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ByteSliceWithWrongDVMarker []byte // want `field DVMaxLength.ByteSliceWithWrongDVMarker must have a maximum length, add kubebuilder:validation:MaxLength marker`
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}
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// StringAliasDVMaxLength is a string type with the DV maxLength marker on the alias.
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// +k8s:maxLength=512
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type StringAliasDVMaxLength string
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// DVMaxLengthWithAliases exercises DV markers on string-alias array elements.
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type DVMaxLengthWithAliases struct {
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// Array of DV-max-length string aliases — should NOT lint on the element length.
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// +kubebuilder:validation:MaxItems:=64
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AliasArrayWithMaxItems []StringAliasDVMaxLength
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// Array without MaxItems marker — SHOULD lint.
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AliasArrayWithoutMaxItems []StringAliasDVMaxLength // want `field DVMaxLengthWithAliases.AliasArrayWithoutMaxItems must have a maximum items, add kubebuilder:validation:MaxItems marker`
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}

‎pkg/analysis/maxlength/testdata/src/a/d.go‎

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package a
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// StringAliasDVMaxLengthB is a string type with the DV maxLength marker on the alias (second file).
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// +k8s:maxLength=512
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type StringAliasDVMaxLengthB string
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// StringAliasNoDVMaxLengthB is a string type without any max-length marker.
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type StringAliasNoDVMaxLengthB string

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