76 lines
1.8 KiB
Go
76 lines
1.8 KiB
Go
// Package testutil provides lightweight test helpers to reduce boilerplate in
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// table-driven tests. Import it from any _test.go file in this module.
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//
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// Every helper calls t.Helper() so failures are reported at the call site, not
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// inside this package.
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package testutil
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import (
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"strings"
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"testing"
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"gitea.djmil.dev/go/template/pkg/result"
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)
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// NoError fails the test immediately if err is not nil.
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func NoError(t *testing.T, err error) {
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t.Helper()
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if err != nil {
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t.Fatalf("unexpected error: %v", err)
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}
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}
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// Error fails the test if err is nil.
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func Error(t *testing.T, err error) {
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t.Helper()
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if err == nil {
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t.Fatal("expected error, got nil")
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}
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}
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// ErrorContains fails the test if err is nil or its message does not contain substr.
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func ErrorContains(t *testing.T, err error, substr string) {
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t.Helper()
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Error(t, err)
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if !strings.Contains(err.Error(), substr) {
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t.Errorf("error %q does not contain %q", err.Error(), substr)
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}
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}
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// Equal fails the test if got != want.
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func Equal[T comparable](t *testing.T, got, want T) {
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t.Helper()
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if got != want {
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t.Errorf("got %v, want %v", got, want)
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}
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}
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// ResultOk fails the test if r holds an error, then returns the value.
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func ResultOk[T any](t *testing.T, r result.Expect[T]) T {
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t.Helper()
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if r.Err() != nil {
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t.Fatalf("unexpected error: %v", r.Err())
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}
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return r.Value()
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}
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// ResultOkNotNil fails the test if r holds an error or its value is nil.
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// T must be a pointer type.
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func ResultOkNotNil[T comparable](t *testing.T, r result.Expect[T]) T {
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t.Helper()
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v := ResultOk(t, r)
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var zero T
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if v == zero {
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t.Fatal("expected non-nil value, got nil")
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}
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return v
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}
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// ResultErr fails the test if r does not hold an error.
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func ResultErr[T any](t *testing.T, r result.Expect[T]) {
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t.Helper()
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if r.Err() == nil {
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t.Fatal("expected error, got nil")
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}
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}
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