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| 1 | +// SPDX-License-Identifier: AGPL-3.0-or-later |
| 2 | + |
| 3 | +package ratelimit |
| 4 | + |
| 5 | +import ( |
| 6 | + "context" |
| 7 | + "net/netip" |
| 8 | + "testing" |
| 9 | + "time" |
| 10 | + |
| 11 | + "github.com/tenseleyFlow/shithub/internal/testing/dbtest" |
| 12 | +) |
| 13 | + |
| 14 | +func TestAllow_UnderLimitThenBlocked(t *testing.T) { |
| 15 | + t.Parallel() |
| 16 | + l := New(dbtest.NewTestDB(t)) |
| 17 | + ctx := context.Background() |
| 18 | + p := Policy{Scope: "test:underthen", Max: 3, Window: time.Hour} |
| 19 | + key := "k1" |
| 20 | + |
| 21 | + for i := 1; i <= 3; i++ { |
| 22 | + d, err := l.Allow(ctx, p, key) |
| 23 | + if err != nil { |
| 24 | + t.Fatalf("hit %d err: %v", i, err) |
| 25 | + } |
| 26 | + if !d.Allowed { |
| 27 | + t.Fatalf("hit %d: expected Allowed; got %v", i, d) |
| 28 | + } |
| 29 | + if d.Limit != 3 { |
| 30 | + t.Errorf("hit %d Limit = %d; want 3", i, d.Limit) |
| 31 | + } |
| 32 | + if d.Remaining != 3-i { |
| 33 | + t.Errorf("hit %d Remaining = %d; want %d", i, d.Remaining, 3-i) |
| 34 | + } |
| 35 | + } |
| 36 | + d, err := l.Allow(ctx, p, key) |
| 37 | + if err != nil { |
| 38 | + t.Fatalf("over-limit err: %v", err) |
| 39 | + } |
| 40 | + if d.Allowed { |
| 41 | + t.Fatalf("4th hit allowed; want blocked") |
| 42 | + } |
| 43 | + if d.RetryAfter <= 0 { |
| 44 | + t.Fatalf("RetryAfter = %v; want > 0", d.RetryAfter) |
| 45 | + } |
| 46 | +} |
| 47 | + |
| 48 | +func TestAllow_DistinctKeysAreIndependent(t *testing.T) { |
| 49 | + t.Parallel() |
| 50 | + l := New(dbtest.NewTestDB(t)) |
| 51 | + ctx := context.Background() |
| 52 | + p := Policy{Scope: "test:distinct", Max: 1, Window: time.Hour} |
| 53 | + |
| 54 | + if d, _ := l.Allow(ctx, p, "alice"); !d.Allowed { |
| 55 | + t.Fatalf("alice first hit blocked: %v", d) |
| 56 | + } |
| 57 | + if d, _ := l.Allow(ctx, p, "bob"); !d.Allowed { |
| 58 | + t.Fatalf("bob first hit blocked: %v", d) |
| 59 | + } |
| 60 | + if d, _ := l.Allow(ctx, p, "alice"); d.Allowed { |
| 61 | + t.Fatalf("alice second hit allowed; want blocked") |
| 62 | + } |
| 63 | +} |
| 64 | + |
| 65 | +func TestAllow_RejectsBadPolicy(t *testing.T) { |
| 66 | + t.Parallel() |
| 67 | + l := New(dbtest.NewTestDB(t)) |
| 68 | + ctx := context.Background() |
| 69 | + cases := []Policy{ |
| 70 | + {Scope: "", Max: 1, Window: time.Hour}, |
| 71 | + {Scope: "x", Max: 0, Window: time.Hour}, |
| 72 | + {Scope: "x", Max: 1, Window: 0}, |
| 73 | + } |
| 74 | + for _, p := range cases { |
| 75 | + if _, err := l.Allow(ctx, p, "k"); err == nil { |
| 76 | + t.Errorf("Allow(%+v) returned nil err; want non-nil", p) |
| 77 | + } |
| 78 | + } |
| 79 | +} |
| 80 | + |
| 81 | +func TestMaskToNetwork(t *testing.T) { |
| 82 | + t.Parallel() |
| 83 | + cases := []struct { |
| 84 | + in, want string |
| 85 | + }{ |
| 86 | + {"192.0.2.5", "192.0.2.0"}, |
| 87 | + {"10.0.0.255", "10.0.0.0"}, |
| 88 | + {"203.0.113.42", "203.0.113.0"}, |
| 89 | + } |
| 90 | + for _, tc := range cases { |
| 91 | + got := maskToNetwork(netip.MustParseAddr(tc.in)) |
| 92 | + if got.String() != tc.want { |
| 93 | + t.Errorf("maskToNetwork(%s) = %s; want %s", tc.in, got, tc.want) |
| 94 | + } |
| 95 | + } |
| 96 | + // IPv6 /48 |
| 97 | + v6 := maskToNetwork(netip.MustParseAddr("2001:db8:dead:beef::1")) |
| 98 | + if want := "2001:db8:dead::"; v6.String() != want { |
| 99 | + t.Errorf("v6 mask = %s; want %s", v6, want) |
| 100 | + } |
| 101 | +} |
| 102 | + |
| 103 | +func TestAllowSignupIP(t *testing.T) { |
| 104 | + t.Parallel() |
| 105 | + l := New(dbtest.NewTestDB(t)) |
| 106 | + ctx := context.Background() |
| 107 | + |
| 108 | + // Two IPs in the same /24 share a counter. |
| 109 | + a := netip.MustParseAddr("198.51.100.5") |
| 110 | + b := netip.MustParseAddr("198.51.100.99") |
| 111 | + d1, _ := l.AllowSignupIP(ctx, a, 2, time.Hour) |
| 112 | + d2, _ := l.AllowSignupIP(ctx, b, 2, time.Hour) |
| 113 | + d3, _ := l.AllowSignupIP(ctx, a, 2, time.Hour) |
| 114 | + if !d1.Allowed || !d2.Allowed { |
| 115 | + t.Fatalf("first two hits should be allowed; got %v %v", d1, d2) |
| 116 | + } |
| 117 | + if d3.Allowed { |
| 118 | + t.Fatalf("third hit (same /24) should be blocked; got %v", d3) |
| 119 | + } |
| 120 | + |
| 121 | + // A different /24 starts fresh. |
| 122 | + other := netip.MustParseAddr("203.0.113.7") |
| 123 | + d4, _ := l.AllowSignupIP(ctx, other, 2, time.Hour) |
| 124 | + if !d4.Allowed { |
| 125 | + t.Fatalf("different /24 first hit should be allowed; got %v", d4) |
| 126 | + } |
| 127 | +} |
