54 lines
1.4 KiB
Go
54 lines
1.4 KiB
Go
package fejkdata
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import (
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"go/ast"
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"slices"
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"sort"
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"strings"
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"testing"
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)
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func TestNoFunctionSpellsAMethod(t *testing.T) {
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funcs, methods := declaredCalls(namespaceFiles(t))
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names := make([]string, 0, len(funcs))
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for name := range funcs {
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names = append(names, name)
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}
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sort.Strings(names)
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for _, name := range names {
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if recv := methods[name]; len(recv) > 0 {
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sort.Strings(recv)
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t.Errorf("func %s is spelled by %s too; name them apart", name, strings.Join(recv, " and "))
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}
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}
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}
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// namespaceFiles is every file declaring into the package namespace, its in-package
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// tests included.
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func namespaceFiles(t *testing.T) []*ast.File {
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t.Helper()
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pkg := packageDir(t)
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_, files := parseFiles(t, slices.Concat(pkg.GoFiles, pkg.TestGoFiles))
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return files
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}
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// declaredCalls is what each name is called as: a function, and the methods
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// spelling it under the types declaring them.
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func declaredCalls(files []*ast.File) (funcs map[string]bool, methods map[string][]string) {
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funcs, methods = map[string]bool{}, map[string][]string{}
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for _, f := range files {
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for _, decl := range f.Decls {
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d, isFunc := decl.(*ast.FuncDecl)
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if !isFunc {
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continue
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}
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if recv := receiverType(d.Recv); recv != "" {
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methods[d.Name.Name] = append(methods[d.Name.Name], recv+"."+d.Name.Name)
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continue
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}
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funcs[d.Name.Name] = true
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}
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}
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return funcs, methods
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}
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