diff options
Diffstat (limited to 'src/cmd/compile/internal/syntax/scanner_test.go')
| -rw-r--r-- | src/cmd/compile/internal/syntax/scanner_test.go | 46 |
1 files changed, 44 insertions, 2 deletions
diff --git a/src/cmd/compile/internal/syntax/scanner_test.go b/src/cmd/compile/internal/syntax/scanner_test.go index 6dc77d41aa..7c8545c3f6 100644 --- a/src/cmd/compile/internal/syntax/scanner_test.go +++ b/src/cmd/compile/internal/syntax/scanner_test.go @@ -22,7 +22,7 @@ func TestScanner(t *testing.T) { defer src.Close() var s scanner - s.init(src) + s.init(src, nil) for { s.next() if s.tok == _EOF { @@ -51,7 +51,7 @@ func TestTokens(t *testing.T) { // scan source var got scanner - got.init(&bytesReader{buf}) + got.init(&bytesReader{buf}, nil) got.next() for i, want := range sampleTokens { nlsemi := false @@ -252,3 +252,45 @@ var sampleTokens = [...]struct { {_Type, "type", 0, 0}, {_Var, "var", 0, 0}, } + +func TestScanErrors(t *testing.T) { + for _, test := range []struct { + src, msg string + }{ + // rune-level errors + {"fo\x00o", "invalid NUL character"}, + {"fo\ufeffo", "invalid BOM in the middle of the file"}, + {"\xff", "invalid UTF-8 encoding"}, + + // token-level errors + {"~", "bitwise complement operator is ^"}, + {"$", "invalid rune '$'"}, + {"0xyz", "malformed hex constant"}, + {"08", "malformed octal constant"}, + {"1.0e+x", "malformed floating-point constant exponent"}, + {`"foo`, "string not terminated"}, + {"`foo", "string not terminated"}, + {"/* foo", "comment not terminated"}, + {`"foo\z"`, "unknown escape sequence"}, + // {`"\x`, "escape sequence not terminated"}, + {`"\x"`, "illegal character U+0022 '\"' in escape sequence"}, + {`"\Uffffffff"`, "escape sequence is invalid Unicode code point"}, + } { + var s scanner + hasError := false + s.init(&bytesReader{[]byte(test.src)}, func(_, line int, msg string) { + hasError = true + // TODO(gri) test exact position as well + if line != 1 { + t.Errorf("got line = %d; want 1", line) + } + if msg != test.msg { + t.Errorf("got msg = %q; want %q", msg, test.msg) + } + }) + s.next() + if !hasError { + t.Errorf("%q: got no error; want %q", test.src, test.msg) + } + } +} |