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9db23eceed
For the client, the Versions option in the quic.Config encodes the first entry is the preferred version. If not set, this should default to the highest supported version.
65 lines
2.1 KiB
Go
65 lines
2.1 KiB
Go
package protocol
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import (
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. "github.com/onsi/ginkgo"
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. "github.com/onsi/gomega"
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)
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var _ = Describe("Version", func() {
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It("converts tags to numbers", func() {
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Expect(VersionTagToNumber('Q' + '1'<<8 + '2'<<16 + '3'<<24)).To(Equal(VersionNumber(123)))
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})
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It("converts number to tag", func() {
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Expect(VersionNumberToTag(VersionNumber(123))).To(Equal(uint32('Q' + '1'<<8 + '2'<<16 + '3'<<24)))
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})
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It("recognizes supported versions", func() {
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Expect(IsSupportedVersion(SupportedVersions, 0)).To(BeFalse())
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Expect(IsSupportedVersion(SupportedVersions, SupportedVersions[0])).To(BeTrue())
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Expect(IsSupportedVersion(SupportedVersions, SupportedVersions[len(SupportedVersions)-1])).To(BeTrue())
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})
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It("has supported versions in sorted order", func() {
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for i := 0; i < len(SupportedVersions)-1; i++ {
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Expect(SupportedVersions[i]).To(BeNumerically(">", SupportedVersions[i+1]))
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}
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})
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Context("highest supported version", func() {
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var initialSupportedVersions []VersionNumber
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BeforeEach(func() {
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initialSupportedVersions = make([]VersionNumber, len(SupportedVersions))
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copy(initialSupportedVersions, SupportedVersions)
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})
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AfterEach(func() {
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SupportedVersions = initialSupportedVersions
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})
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It("finds the supported version", func() {
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SupportedVersions = []VersionNumber{3, 2, 1}
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other := []VersionNumber{3, 4, 5, 6}
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found, ver := HighestSupportedVersion(other)
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Expect(found).To(BeTrue())
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Expect(ver).To(Equal(VersionNumber(3)))
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})
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It("picks the highest supported version", func() {
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SupportedVersions = []VersionNumber{7, 6, 3, 2, 1}
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other := []VersionNumber{3, 6, 1, 8, 2, 10}
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found, ver := HighestSupportedVersion(other)
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Expect(found).To(BeTrue())
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Expect(ver).To(Equal(VersionNumber(6)))
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})
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It("handles empty inputs", func() {
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SupportedVersions = []VersionNumber{102, 101}
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Expect(HighestSupportedVersion([]VersionNumber{})).To(BeFalse())
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SupportedVersions = []VersionNumber{}
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Expect(HighestSupportedVersion([]VersionNumber{1, 2})).To(BeFalse())
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Expect(HighestSupportedVersion([]VersionNumber{})).To(BeFalse())
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})
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})
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})
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