20 lines
515 B
Go
20 lines
515 B
Go
package testutil
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import (
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"strings"
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"testing"
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)
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// RequireErrorContains is a test helper for asserting that an error occurred
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// and the error message returned contains the expected error message as a
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// substring.
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func RequireErrorContains(t testing.TB, err error, expectedErrorMessage string) {
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t.Helper()
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if err == nil {
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t.Fatal("An error is expected but got nil.")
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}
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if !strings.Contains(err.Error(), expectedErrorMessage) {
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t.Fatalf("expected err %v to contain %q", err, expectedErrorMessage)
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}
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}
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