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| 1 | +package sequence |
| 2 | + |
| 3 | +import "testing" |
| 4 | + |
| 5 | +// TestArrowTypes checks that each message arrow syntax parses to the correct |
| 6 | +// ArrowType, including line style (solid/dotted) and whether it has a head. |
| 7 | +func TestArrowTypes(t *testing.T) { |
| 8 | + tests := []struct { |
| 9 | + arrow string |
| 10 | + want ArrowType |
| 11 | + wantDotted bool |
| 12 | + wantHead bool |
| 13 | + }{ |
| 14 | + {"->>", SolidArrow, false, true}, |
| 15 | + {"-->>", DottedArrow, true, true}, |
| 16 | + {"->", SolidOpen, false, false}, |
| 17 | + {"-->", DottedOpen, true, false}, |
| 18 | + } |
| 19 | + |
| 20 | + for _, tt := range tests { |
| 21 | + t.Run(tt.arrow, func(t *testing.T) { |
| 22 | + sd, err := Parse("sequenceDiagram\n A" + tt.arrow + "B: msg") |
| 23 | + if err != nil { |
| 24 | + t.Fatalf("parse %q: %v", tt.arrow, err) |
| 25 | + } |
| 26 | + if len(sd.Messages) != 1 { |
| 27 | + t.Fatalf("expected 1 message, got %d", len(sd.Messages)) |
| 28 | + } |
| 29 | + got := sd.Messages[0].ArrowType |
| 30 | + if got != tt.want { |
| 31 | + t.Errorf("ArrowType = %v, want %v", got, tt.want) |
| 32 | + } |
| 33 | + if got.isDotted() != tt.wantDotted { |
| 34 | + t.Errorf("isDotted() = %v, want %v", got.isDotted(), tt.wantDotted) |
| 35 | + } |
| 36 | + if got.hasHead() != tt.wantHead { |
| 37 | + t.Errorf("hasHead() = %v, want %v", got.hasHead(), tt.wantHead) |
| 38 | + } |
| 39 | + }) |
| 40 | + } |
| 41 | +} |
| 42 | + |
| 43 | +// TestUnsupportedArrowsRejected documents that arrow types we don't yet support |
| 44 | +// (async -x/-), cross, and bidirectional <<->>) are rejected rather than |
| 45 | +// silently mis-parsed. mermaid supports these; adding them is future work. |
| 46 | +func TestUnsupportedArrowsRejected(t *testing.T) { |
| 47 | + for _, in := range []string{ |
| 48 | + "sequenceDiagram\n A-xB: cross", |
| 49 | + "sequenceDiagram\n A-)B: async", |
| 50 | + "sequenceDiagram\n A--xB: dotted cross", |
| 51 | + "sequenceDiagram\n A--)B: dotted async", |
| 52 | + "sequenceDiagram\n A<<->>B: bidirectional", |
| 53 | + } { |
| 54 | + if _, err := Parse(in); err == nil { |
| 55 | + t.Errorf("expected error for unsupported arrow in %q, got none", in) |
| 56 | + } |
| 57 | + } |
| 58 | +} |
| 59 | + |
| 60 | +// TestOpenArrowEmptyLabel checks an open arrow with an empty label parses, like |
| 61 | +// the existing ->> empty-label case. |
| 62 | +func TestOpenArrowEmptyLabel(t *testing.T) { |
| 63 | + sd, err := Parse("sequenceDiagram\n A->B: ") |
| 64 | + if err != nil { |
| 65 | + t.Fatalf("parse: %v", err) |
| 66 | + } |
| 67 | + if len(sd.Messages) != 1 || sd.Messages[0].ArrowType != SolidOpen { |
| 68 | + t.Fatalf("expected 1 SolidOpen message, got %d msgs", len(sd.Messages)) |
| 69 | + } |
| 70 | + if sd.Messages[0].Label != "" { |
| 71 | + t.Errorf("expected empty label, got %q", sd.Messages[0].Label) |
| 72 | + } |
| 73 | +} |
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