api: add tests that ensure types and reasons are registered correctly (…

…#122)

Signed-off-by: Joe Lanford <joe.lanford@gmail.com>

api/v1alpha1/operator_types_test.go

@@ -0,0 +1,93 @@
+package v1alpha1_test
+
+import (
+	"fmt"
+	"go/ast"
+	"go/parser"
+	"go/token"
+	"io/fs"
+	"strconv"
+	"strings"
+
+	. "github.com/onsi/ginkgo/v2"
+	. "github.com/onsi/gomega"
+
+	operatorutil "github.com/operator-framework/operator-controller/internal/util"
+)
+
+var _ = Describe("OperatorTypes", func() {
+	Describe("Condition Type and Reason constants", func() {
+		It("should register types in operatorutil.ConditionTypes", func() {
+			types, err := parseConstants("Type")
+			Expect(err).NotTo(HaveOccurred())
+
+			for _, t := range types {
+				Expect(t).To(BeElementOf(operatorutil.ConditionTypes), "Append Type%s to operatorutil.ConditionTypes in this package's init function.", t)
+			}
+			for _, t := range operatorutil.ConditionTypes {
+				Expect(t).To(BeElementOf(types), "There must be a Type%[1]s string literal constant for type %[1]q (i.e. 'const Type%[1]s = %[1]q')", t)
+			}
+		})
+		It("should register reasons in operatorutil.ConditionReasons", func() {
+			reasons, err := parseConstants("Reason")
+			Expect(err).NotTo(HaveOccurred())
+
+			for _, r := range reasons {
+				Expect(r).To(BeElementOf(operatorutil.ConditionReasons), "Append Reason%s to operatorutil.ConditionReasons in this package's init function.", r)
+			}
+			for _, r := range operatorutil.ConditionReasons {
+				Expect(r).To(BeElementOf(reasons), "There must be a Reason%[1]s string literal constant for reason %[1]q (i.e. 'const Reason%[1]s = %[1]q')", r)
+			}
+		})
+	})
+})
+
+// parseConstants parses the values of the top-level constants in the current
+// directory whose names start with the given prefix. When running as part of a
+// test, the current directory is the directory of the file that contains the
+// test in which this function is called.
+func parseConstants(prefix string) ([]string, error) {
+	fset := token.NewFileSet()
+	// ParseDir returns a map of package name to package ASTs. An AST is a representation of the source code
+	// that can be traversed to extract information. The map is keyed by the package name.
+	pkgs, err := parser.ParseDir(fset, ".", func(info fs.FileInfo) bool {
+		return !strings.HasSuffix(info.Name(), "_test.go")
+	}, 0)
+	if err != nil {
+		return nil, err
+	}
+
+	var constValues []string
+
+	// Iterate all of the top-level declarations in each package's files,
+	// looking for constants that start with the prefix. When we find one,
+	// add its value to the constValues list.
+	for _, pkg := range pkgs {
+		for _, f := range pkg.Files {
+			for _, d := range f.Decls {
+				genDecl, ok := d.(*ast.GenDecl)
+				if !ok {
+					continue
+				}
+				for _, s := range genDecl.Specs {
+					valueSpec, ok := s.(*ast.ValueSpec)
+					if !ok || len(valueSpec.Names) != 1 || valueSpec.Names[0].Obj.Kind != ast.Con || !strings.HasPrefix(valueSpec.Names[0].String(), prefix) {
+						continue
+					}
+					for _, val := range valueSpec.Values {
+						lit, ok := val.(*ast.BasicLit)
+						if !ok || lit.Kind != token.STRING {
+							continue
+						}
+						v, err := strconv.Unquote(lit.Value)
+						if err != nil {
+							return nil, fmt.Errorf("unquote literal string %s: %v", lit.Value, err)
+						}
+						constValues = append(constValues, v)
+					}
+				}
+			}
+		}
+	}
+	return constValues, nil
+}

api/v1alpha1/v1alpha1_suite_test.go

@@ -0,0 +1,13 @@
+package v1alpha1_test
+
+import (
+	"testing"
+
+	. "github.com/onsi/ginkgo/v2"
+	. "github.com/onsi/gomega"
+)
+
+func TestV1alpha1(t *testing.T) {
+	RegisterFailHandler(Fail)
+	RunSpecs(t, "V1alpha1 Suite")
+}