133 lines
3.3 KiB
Go
133 lines
3.3 KiB
Go
package tengo_test
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import (
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"testing"
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"github.com/d5/tengo/v2"
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"github.com/d5/tengo/v2/require"
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)
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func TestSymbolTable(t *testing.T) {
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/*
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GLOBAL
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[0] a
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[1] b
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LOCAL 1
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[0] d
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LOCAL 2
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[0] e
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[1] f
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LOCAL 2 BLOCK 1
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[2] g
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[3] h
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LOCAL 2 BLOCK 2
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[2] i
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[3] j
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[4] k
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LOCAL 1 BLOCK 1
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[1] l
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[2] m
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[3] n
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[4] o
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[5] p
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LOCAL 3
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[0] q
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[1] r
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*/
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global := symbolTable()
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require.Equal(t, globalSymbol("a", 0), global.Define("a"))
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require.Equal(t, globalSymbol("b", 1), global.Define("b"))
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local1 := global.Fork(false)
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require.Equal(t, localSymbol("d", 0), local1.Define("d"))
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local1Block1 := local1.Fork(true)
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require.Equal(t, localSymbol("l", 1), local1Block1.Define("l"))
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require.Equal(t, localSymbol("m", 2), local1Block1.Define("m"))
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require.Equal(t, localSymbol("n", 3), local1Block1.Define("n"))
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require.Equal(t, localSymbol("o", 4), local1Block1.Define("o"))
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require.Equal(t, localSymbol("p", 5), local1Block1.Define("p"))
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local2 := local1.Fork(false)
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require.Equal(t, localSymbol("e", 0), local2.Define("e"))
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require.Equal(t, localSymbol("f", 1), local2.Define("f"))
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local2Block1 := local2.Fork(true)
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require.Equal(t, localSymbol("g", 2), local2Block1.Define("g"))
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require.Equal(t, localSymbol("h", 3), local2Block1.Define("h"))
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local2Block2 := local2.Fork(true)
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require.Equal(t, localSymbol("i", 2), local2Block2.Define("i"))
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require.Equal(t, localSymbol("j", 3), local2Block2.Define("j"))
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require.Equal(t, localSymbol("k", 4), local2Block2.Define("k"))
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local3 := local1Block1.Fork(false)
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require.Equal(t, localSymbol("q", 0), local3.Define("q"))
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require.Equal(t, localSymbol("r", 1), local3.Define("r"))
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require.Equal(t, 2, global.MaxSymbols())
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require.Equal(t, 6, local1.MaxSymbols())
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require.Equal(t, 6, local1Block1.MaxSymbols())
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require.Equal(t, 5, local2.MaxSymbols())
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require.Equal(t, 4, local2Block1.MaxSymbols())
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require.Equal(t, 5, local2Block2.MaxSymbols())
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require.Equal(t, 2, local3.MaxSymbols())
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resolveExpect(t, global, "a", globalSymbol("a", 0), 0)
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resolveExpect(t, local1, "d", localSymbol("d", 0), 0)
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resolveExpect(t, local1, "a", globalSymbol("a", 0), 1)
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resolveExpect(t, local3, "a", globalSymbol("a", 0), 3)
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resolveExpect(t, local3, "d", freeSymbol("d", 0), 2)
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resolveExpect(t, local3, "r", localSymbol("r", 1), 0)
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resolveExpect(t, local2Block2, "k", localSymbol("k", 4), 0)
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resolveExpect(t, local2Block2, "e", localSymbol("e", 0), 1)
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resolveExpect(t, local2Block2, "b", globalSymbol("b", 1), 3)
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}
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func symbol(
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name string,
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scope tengo.SymbolScope,
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index int,
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) *tengo.Symbol {
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return &tengo.Symbol{
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Name: name,
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Scope: scope,
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Index: index,
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}
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}
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func globalSymbol(name string, index int) *tengo.Symbol {
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return symbol(name, tengo.ScopeGlobal, index)
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}
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func localSymbol(name string, index int) *tengo.Symbol {
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return symbol(name, tengo.ScopeLocal, index)
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}
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func freeSymbol(name string, index int) *tengo.Symbol {
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return symbol(name, tengo.ScopeFree, index)
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}
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func symbolTable() *tengo.SymbolTable {
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return tengo.NewSymbolTable()
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}
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func resolveExpect(
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t *testing.T,
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symbolTable *tengo.SymbolTable,
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name string,
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expectedSymbol *tengo.Symbol,
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expectedDepth int,
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) {
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actualSymbol, actualDepth, ok := symbolTable.Resolve(name, true)
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require.True(t, ok)
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require.Equal(t, expectedSymbol, actualSymbol)
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require.Equal(t, expectedDepth, actualDepth)
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}
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