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ast_test.go
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ast_test.go
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package mermaid
import (
"os"
"path/filepath"
"testing"
"github.com/stretchr/testify/assert"
"github.com/stretchr/testify/require"
"github.com/yuin/goldmark/text"
)
func hijackStdout(t testing.TB) (path string, close func() error) {
stdout := os.Stdout
t.Cleanup(func() {
os.Stdout = stdout
})
path = filepath.Join(t.TempDir(), "stdout")
f, err := os.Create(path)
require.NoError(t, err)
os.Stdout = f
return path, f.Close
}
func TestBlock(t *testing.T) {
src := []byte("foo\n")
lines := text.NewSegments()
lines.Append(text.NewSegment(0, len(src)))
var b Block
b.SetLines(lines)
t.Run("Raw", func(t *testing.T) {
t.Parallel()
assert.True(t, b.IsRaw())
})
t.Run("Dump", func(t *testing.T) {
stdout, closeStdout := hijackStdout(t)
b.Dump(src, 0)
require.NoError(t, closeStdout())
got, err := os.ReadFile(stdout)
require.NoError(t, err)
require.Equal(t, unlines(
"MermaidBlock {",
" RawText: \"foo\n\"",
" HasBlankPreviousLines: false",
"}",
), string(got))
})
}
func TestScript(t *testing.T) {
var sb ScriptBlock
t.Run("Raw", func(t *testing.T) {
t.Parallel()
assert.True(t, sb.IsRaw())
})
t.Run("Dump", func(t *testing.T) {
stdout, closeStdout := hijackStdout(t)
sb.Dump(nil /* src */, 0)
require.NoError(t, closeStdout())
got, err := os.ReadFile(stdout)
require.NoError(t, err)
require.Equal(t, unlines(
"MermaidScriptBlock {",
" RawText: \"\"",
" HasBlankPreviousLines: false",
"}",
), string(got))
})
}
func blockFromReader(reader text.Reader) *Block {
segs := text.NewSegments()
for {
line, seg := reader.PeekLine()
if line == nil {
break
}
segs.Append(seg)
reader.AdvanceLine()
}
blk := new(Block)
blk.SetLines(segs)
return blk
}