test(auth): Assert JWT headers and claims (alg, typ, iat, exp)#13472
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This pull request adds assertions to verify JWT header and payload claims (such as algorithm, type, issued-at, and expiration times) in ServiceAccountCredentialsTest and ServiceAccountJwtAccessCredentialsTest. The review feedback suggests using type-safe getters getIssuedAtTimeSeconds() and getExpirationTimeSeconds() from JsonWebToken.Payload instead of generic map lookups and casting to Long to avoid potential ClassCastException issues.
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This commit adds explicit assertions to verify that the generated JWS header correctly contains 'alg=RS256' and 'typ=JWT', and that the JWT payload contains the 'iat' and 'exp' claims with exactly a 3600-second (1-hour) expiration offset. This brings the Java library's test suite into alignment with the expected auth specification. Other Google Cloud client libraries like Go, Node.js, and Python natively assert the presence of these standard headers and the 1-hour expiration window during their Self-Signed JWT generation tests.
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macastelaz
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Jun 16, 2026
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This commit adds explicit assertions to verify that the generated JWS header correctly contains 'alg=RS256' and 'typ=JWT', and that the JWT payload contains the 'iat' and 'exp' claims with exactly a 3600-second (1-hour) expiration offset.
This brings the Java library's test suite into alignment with the expected auth specification. Other Google Cloud client libraries like Go, Node.js, and Python natively assert the presence of these standard headers and the 1-hour expiration window during their Self-Signed JWT generation tests.