| 1 | // SPDX-License-Identifier: GPL-3.0-or-later |
| 2 | |
| 3 | package cloudauth |
| 4 | |
| 5 | import ( |
| 6 | "context" |
| 7 | "errors" |
| 8 | "testing" |
| 9 | "time" |
| 10 | |
| 11 | "github.com/Azure/azure-sdk-for-go/sdk/azcore" |
| 12 | "github.com/Azure/azure-sdk-for-go/sdk/azcore/policy" |
| 13 | "github.com/stretchr/testify/assert" |
| 14 | "github.com/stretchr/testify/require" |
| 15 | ) |
| 16 | |
| 17 | type fakeTokenCredential struct { |
| 18 | getToken func(ctx context.Context, opts policy.TokenRequestOptions) (azcore.AccessToken, error) |
| 19 | } |
| 20 | |
| 21 | func (f fakeTokenCredential) GetToken(ctx context.Context, opts policy.TokenRequestOptions) (azcore.AccessToken, error) { |
| 22 | return f.getToken(ctx, opts) |
| 23 | } |
| 24 | |
| 25 | func TestNewTokenProviderValidation(t *testing.T) { |
| 26 | _, err := NewTokenProvider(nil, []string{"scope"}, time.Minute) |
| 27 | require.Error(t, err) |
| 28 | |
| 29 | cred := fakeTokenCredential{ |
| 30 | getToken: func(ctx context.Context, opts policy.TokenRequestOptions) (azcore.AccessToken, error) { |
| 31 | return azcore.AccessToken{}, nil |
| 32 | }, |
| 33 | } |
| 34 | _, err = NewTokenProvider(cred, nil, time.Minute) |
| 35 | require.Error(t, err) |
| 36 | } |
| 37 | |
| 38 | func TestNewTokenProviderDefaultsRefreshMarginWhenNonPositive(t *testing.T) { |
| 39 | cred := fakeTokenCredential{ |
| 40 | getToken: func(ctx context.Context, opts policy.TokenRequestOptions) (azcore.AccessToken, error) { |
| 41 | return azcore.AccessToken{}, nil |
| 42 | }, |
| 43 | } |
| 44 | |
| 45 | p, err := NewTokenProvider(cred, []string{"scope"}, 0) |
| 46 | require.NoError(t, err) |
| 47 | assert.Equal(t, DefaultTokenRefreshMargin, p.refreshMargin) |
| 48 | |
| 49 | p, err = NewTokenProvider(cred, []string{"scope"}, -1*time.Minute) |
| 50 | require.NoError(t, err) |
| 51 | assert.Equal(t, DefaultTokenRefreshMargin, p.refreshMargin) |
| 52 | } |
| 53 | |
| 54 | func TestTokenProviderCachesToken(t *testing.T) { |
| 55 | baseNow := time.Date(2026, time.March, 6, 10, 0, 0, 0, time.UTC) |
| 56 | calls := 0 |
| 57 | cred := fakeTokenCredential{ |
| 58 | getToken: func(ctx context.Context, opts policy.TokenRequestOptions) (azcore.AccessToken, error) { |
| 59 | calls++ |
| 60 | return azcore.AccessToken{ |
| 61 | Token: "token-1", |
| 62 | ExpiresOn: baseNow.Add(30 * time.Minute), |
| 63 | }, nil |
| 64 | }, |
| 65 | } |
| 66 | |
| 67 | p, err := NewTokenProvider(cred, []string{"scope"}, 5*time.Minute) |
| 68 | require.NoError(t, err) |
| 69 | p.now = func() time.Time { return baseNow } |
| 70 | |
| 71 | token, expiry, err := p.Token(context.Background()) |
| 72 | require.NoError(t, err) |
| 73 | assert.Equal(t, "token-1", token) |
| 74 | assert.Equal(t, baseNow.Add(30*time.Minute), expiry) |
| 75 | |
| 76 | token, _, err = p.Token(context.Background()) |
| 77 | require.NoError(t, err) |
| 78 | assert.Equal(t, "token-1", token) |
| 79 | assert.Equal(t, 1, calls) |
| 80 | } |
| 81 | |
| 82 | func TestTokenProviderRefreshesNearExpiry(t *testing.T) { |
| 83 | baseNow := time.Date(2026, time.March, 6, 10, 0, 0, 0, time.UTC) |
| 84 | currentNow := baseNow |
| 85 | calls := 0 |
| 86 | |
| 87 | cred := fakeTokenCredential{ |
| 88 | getToken: func(ctx context.Context, opts policy.TokenRequestOptions) (azcore.AccessToken, error) { |
| 89 | calls++ |
| 90 | return azcore.AccessToken{ |
| 91 | Token: "token-" + string(rune('0'+calls)), |
| 92 | ExpiresOn: currentNow.Add(10 * time.Minute), |
| 93 | }, nil |
| 94 | }, |
| 95 | } |
| 96 | |
| 97 | p, err := NewTokenProvider(cred, []string{"scope"}, 5*time.Minute) |
| 98 | require.NoError(t, err) |
| 99 | p.now = func() time.Time { return currentNow } |
| 100 | |
| 101 | first, _, err := p.Token(context.Background()) |
| 102 | require.NoError(t, err) |
| 103 | |
| 104 | // Past expiry-refresh boundary: now + margin >= cached expiry. |
| 105 | currentNow = baseNow.Add(6 * time.Minute) |
| 106 | second, _, err := p.Token(context.Background()) |
| 107 | require.NoError(t, err) |
| 108 | |
| 109 | assert.NotEqual(t, first, second) |
| 110 | assert.Equal(t, 2, calls) |
| 111 | } |
| 112 | |
| 113 | func TestTokenProviderReturnsCredentialError(t *testing.T) { |
| 114 | cred := fakeTokenCredential{ |
| 115 | getToken: func(ctx context.Context, opts policy.TokenRequestOptions) (azcore.AccessToken, error) { |
| 116 | return azcore.AccessToken{}, errors.New("boom") |
| 117 | }, |
| 118 | } |
| 119 | |
| 120 | p, err := NewTokenProvider(cred, []string{"scope"}, time.Minute) |
| 121 | require.NoError(t, err) |
| 122 | |
| 123 | _, _, err = p.Token(context.Background()) |
| 124 | require.Error(t, err) |
| 125 | } |
| 126 | |
| 127 | func TestTokenProviderFallsBackOnRefreshFailure(t *testing.T) { |
| 128 | baseNow := time.Date(2026, time.March, 6, 10, 0, 0, 0, time.UTC) |
| 129 | currentNow := baseNow |
| 130 | calls := 0 |
| 131 | |
| 132 | cred := fakeTokenCredential{ |
| 133 | getToken: func(ctx context.Context, opts policy.TokenRequestOptions) (azcore.AccessToken, error) { |
| 134 | calls++ |
| 135 | if calls == 1 { |
| 136 | return azcore.AccessToken{ |
| 137 | Token: "good-token", |
| 138 | ExpiresOn: baseNow.Add(10 * time.Minute), |
| 139 | }, nil |
| 140 | } |
| 141 | return azcore.AccessToken{}, errors.New("transient failure") |
| 142 | }, |
| 143 | } |
| 144 | |
| 145 | p, err := NewTokenProvider(cred, []string{"scope"}, 5*time.Minute) |
| 146 | require.NoError(t, err) |
| 147 | p.now = func() time.Time { return currentNow } |
| 148 | |
| 149 | // First call succeeds |
| 150 | token, _, err := p.Token(context.Background()) |
| 151 | require.NoError(t, err) |
| 152 | assert.Equal(t, "good-token", token) |
| 153 | |
| 154 | // Advance into refresh margin but before expiry |
| 155 | currentNow = baseNow.Add(6 * time.Minute) |
| 156 | token, _, err = p.Token(context.Background()) |
| 157 | require.NoError(t, err) |
| 158 | assert.Equal(t, "good-token", token) |
| 159 | |
| 160 | // Advance past expiry — should error since no valid cache |
| 161 | currentNow = baseNow.Add(11 * time.Minute) |
| 162 | _, _, err = p.Token(context.Background()) |
| 163 | require.Error(t, err) |
| 164 | } |
| 165 | |
| 166 | func TestTokenProviderDoesNotFallbackToExpiredTokenAfterSlowRefreshFailure(t *testing.T) { |
| 167 | baseNow := time.Date(2026, time.March, 6, 10, 0, 0, 0, time.UTC) |
| 168 | currentNow := baseNow |
| 169 | calls := 0 |
| 170 | |
| 171 | cred := fakeTokenCredential{ |
| 172 | getToken: func(ctx context.Context, opts policy.TokenRequestOptions) (azcore.AccessToken, error) { |
| 173 | calls++ |
| 174 | if calls == 1 { |
| 175 | return azcore.AccessToken{ |
| 176 | Token: "good-token", |
| 177 | ExpiresOn: baseNow.Add(10 * time.Minute), |
| 178 | }, nil |
| 179 | } |
| 180 | |
| 181 | // Simulate a slow refresh attempt that crosses token expiry before failing. |
| 182 | currentNow = baseNow.Add(11 * time.Minute) |
| 183 | return azcore.AccessToken{}, errors.New("slow refresh failure") |
| 184 | }, |
| 185 | } |
| 186 | |
| 187 | p, err := NewTokenProvider(cred, []string{"scope"}, 5*time.Minute) |
| 188 | require.NoError(t, err) |
| 189 | p.now = func() time.Time { return currentNow } |
| 190 | |
| 191 | // Seed cache. |
| 192 | token, _, err := p.Token(context.Background()) |
| 193 | require.NoError(t, err) |
| 194 | assert.Equal(t, "good-token", token) |
| 195 | |
| 196 | // Enter refresh window while token is still valid. |
| 197 | currentNow = baseNow.Add(6 * time.Minute) |
| 198 | |
| 199 | // Refresh fails after cache has expired in wall-clock time. |
| 200 | _, _, err = p.Token(context.Background()) |
| 201 | require.Error(t, err) |
| 202 | assert.Equal(t, 2, calls) |
| 203 | } |