510 lines
12 KiB
Go
510 lines
12 KiB
Go
package commands
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import (
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"strings"
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"testing"
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"c65gm/internal/compiler"
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"c65gm/internal/preproc"
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)
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func TestSubtractCommand_WillHandle(t *testing.T) {
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cmd := &SubtractCommand{}
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tests := []struct {
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name string
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line string
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want bool
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}{
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{"old syntax SUBTRACT FROM/GIVING", "SUBTRACT a FROM b GIVING c", true},
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{"old syntax SUBT FROM/arrow", "SUBT a FROM b -> c", true},
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{"old syntax SUBT minus/arrow", "SUBT a - b -> c", true},
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{"old syntax SUBTRACT minus/GIVING", "SUBTRACT a - b GIVING c", true},
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{"new syntax", "result = x - y", true},
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{"not SUBTRACT", "ADD a TO b GIVING c", false},
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{"wrong param count", "SUBTRACT a b c", false},
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{"empty", "", false},
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{"new syntax wrong op", "result = x + y", false},
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}
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for _, tt := range tests {
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t.Run(tt.name, func(t *testing.T) {
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line := preproc.Line{Text: tt.line, Kind: preproc.Source}
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got := cmd.WillHandle(line)
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if got != tt.want {
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t.Errorf("WillHandle() = %v, want %v", got, tt.want)
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}
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})
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}
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}
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func TestSubtractCommand_OldSyntax_FROM(t *testing.T) {
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tests := []struct {
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name string
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line string
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setupVars func(*compiler.SymbolTable)
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wantAsm []string
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wantErr bool
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}{
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{
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name: "SUBTRACT a FROM b (means b-a)",
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line: "SUBTRACT 5 FROM 10 GIVING result",
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setupVars: func(st *compiler.SymbolTable) {
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st.AddVar("result", "", compiler.KindByte, 0)
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},
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wantAsm: []string{
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"\tlda #$05",
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"\tsta result",
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},
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},
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{
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name: "SUBTRACT byte FROM byte -> byte (variables)",
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line: "SUBTRACT a FROM b GIVING result",
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setupVars: func(st *compiler.SymbolTable) {
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st.AddVar("a", "", compiler.KindByte, 10)
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st.AddVar("b", "", compiler.KindByte, 20)
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st.AddVar("result", "", compiler.KindByte, 0)
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},
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wantAsm: []string{
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"\tsec",
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"\tlda b",
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"\tsbc a",
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"\tsta result",
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},
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},
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{
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name: "SUBT a FROM b -> c with arrow",
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line: "SUBT a FROM b -> result",
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setupVars: func(st *compiler.SymbolTable) {
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st.AddVar("a", "", compiler.KindByte, 10)
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st.AddVar("b", "", compiler.KindByte, 20)
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st.AddVar("result", "", compiler.KindByte, 0)
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},
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wantAsm: []string{
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"\tsec",
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"\tlda b",
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"\tsbc a",
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"\tsta result",
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},
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},
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{
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name: "SUBTRACT literal FROM variable",
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line: "SUBTRACT 10 FROM a GIVING result",
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setupVars: func(st *compiler.SymbolTable) {
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st.AddVar("a", "", compiler.KindByte, 20)
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st.AddVar("result", "", compiler.KindByte, 0)
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},
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wantAsm: []string{
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"\tsec",
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"\tlda a",
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"\tsbc #$0a",
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"\tsta result",
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},
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},
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{
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name: "word FROM word -> word",
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line: "SUBTRACT x FROM y GIVING result",
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setupVars: func(st *compiler.SymbolTable) {
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st.AddVar("x", "", compiler.KindWord, 0x1000)
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st.AddVar("y", "", compiler.KindWord, 0x2000)
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st.AddVar("result", "", compiler.KindWord, 0)
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},
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wantAsm: []string{
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"\tsec",
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"\tlda y",
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"\tsbc x",
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"\tsta result",
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"\tlda y+1",
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"\tsbc x+1",
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"\tsta result+1",
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},
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},
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}
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for _, tt := range tests {
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t.Run(tt.name, func(t *testing.T) {
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ctx := compiler.NewCompilerContext(&preproc.Pragma{})
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tt.setupVars(ctx.SymbolTable)
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cmd := &SubtractCommand{}
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line := preproc.Line{Text: tt.line, Kind: preproc.Source}
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err := cmd.Interpret(line, ctx)
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if tt.wantErr {
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if err == nil {
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t.Error("expected error, got nil")
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}
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return
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}
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if err != nil {
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t.Fatalf("Interpret() error = %v", err)
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}
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asm, err := cmd.Generate(ctx)
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if err != nil {
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t.Fatalf("Generate() error = %v", err)
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}
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if !equalAsmSubtr(asm, tt.wantAsm) {
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t.Errorf("Generate() mismatch\ngot:\n%s\nwant:\n%s",
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strings.Join(asm, "\n"),
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strings.Join(tt.wantAsm, "\n"))
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}
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})
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}
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}
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func TestSubtractCommand_OldSyntax_Minus(t *testing.T) {
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tests := []struct {
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name string
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line string
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setupVars func(*compiler.SymbolTable)
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wantAsm []string
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wantErr bool
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}{
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{
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name: "SUBT a - b (means a-b, no swap)",
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line: "SUBT 10 - 5 GIVING result",
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setupVars: func(st *compiler.SymbolTable) {
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st.AddVar("result", "", compiler.KindByte, 0)
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},
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wantAsm: []string{
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"\tlda #$05",
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"\tsta result",
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},
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},
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{
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name: "SUBT byte - byte -> byte (variables)",
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line: "SUBT a - b -> result",
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setupVars: func(st *compiler.SymbolTable) {
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st.AddVar("a", "", compiler.KindByte, 20)
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st.AddVar("b", "", compiler.KindByte, 10)
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st.AddVar("result", "", compiler.KindByte, 0)
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},
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wantAsm: []string{
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"\tsec",
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"\tlda a",
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"\tsbc b",
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"\tsta result",
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},
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},
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{
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name: "SUBTRACT a - b GIVING c",
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line: "SUBTRACT a - b GIVING result",
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setupVars: func(st *compiler.SymbolTable) {
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st.AddVar("a", "", compiler.KindByte, 20)
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st.AddVar("b", "", compiler.KindByte, 10)
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st.AddVar("result", "", compiler.KindByte, 0)
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},
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wantAsm: []string{
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"\tsec",
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"\tlda a",
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"\tsbc b",
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"\tsta result",
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},
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},
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{
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name: "SUBT variable - literal",
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line: "SUBT a - 10 -> result",
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setupVars: func(st *compiler.SymbolTable) {
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st.AddVar("a", "", compiler.KindByte, 20)
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st.AddVar("result", "", compiler.KindByte, 0)
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},
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wantAsm: []string{
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"\tsec",
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"\tlda a",
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"\tsbc #$0a",
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"\tsta result",
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},
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},
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{
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name: "word - word -> word",
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line: "SUBT x - y -> result",
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setupVars: func(st *compiler.SymbolTable) {
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st.AddVar("x", "", compiler.KindWord, 0x2000)
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st.AddVar("y", "", compiler.KindWord, 0x1000)
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st.AddVar("result", "", compiler.KindWord, 0)
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},
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wantAsm: []string{
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"\tsec",
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"\tlda x",
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"\tsbc y",
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"\tsta result",
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"\tlda x+1",
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"\tsbc y+1",
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"\tsta result+1",
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},
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},
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{
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name: "byte - byte -> word",
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line: "SUBT a - b GIVING result",
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setupVars: func(st *compiler.SymbolTable) {
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st.AddVar("a", "", compiler.KindByte, 20)
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st.AddVar("b", "", compiler.KindByte, 10)
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st.AddVar("result", "", compiler.KindWord, 0)
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},
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wantAsm: []string{
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"\tsec",
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"\tlda a",
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"\tsbc b",
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"\tsta result",
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"\tlda #0",
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"\tsbc #0",
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"\tsta result+1",
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},
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},
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}
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for _, tt := range tests {
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t.Run(tt.name, func(t *testing.T) {
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ctx := compiler.NewCompilerContext(&preproc.Pragma{})
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tt.setupVars(ctx.SymbolTable)
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cmd := &SubtractCommand{}
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line := preproc.Line{Text: tt.line, Kind: preproc.Source}
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err := cmd.Interpret(line, ctx)
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if tt.wantErr {
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if err == nil {
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t.Error("expected error, got nil")
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}
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return
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}
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if err != nil {
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t.Fatalf("Interpret() error = %v", err)
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}
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asm, err := cmd.Generate(ctx)
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if err != nil {
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t.Fatalf("Generate() error = %v", err)
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}
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if !equalAsmSubtr(asm, tt.wantAsm) {
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t.Errorf("Generate() mismatch\ngot:\n%s\nwant:\n%s",
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strings.Join(asm, "\n"),
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strings.Join(tt.wantAsm, "\n"))
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}
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})
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}
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}
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func TestSubtractCommand_NewSyntax(t *testing.T) {
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tests := []struct {
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name string
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line string
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setupVars func(*compiler.SymbolTable)
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wantAsm []string
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wantErr bool
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}{
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{
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name: "byte - byte -> byte",
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line: "result = a - b",
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setupVars: func(st *compiler.SymbolTable) {
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st.AddVar("a", "", compiler.KindByte, 20)
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st.AddVar("b", "", compiler.KindByte, 10)
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st.AddVar("result", "", compiler.KindByte, 0)
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},
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wantAsm: []string{
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"\tsec",
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"\tlda a",
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"\tsbc b",
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"\tsta result",
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},
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},
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{
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name: "byte - byte -> word",
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line: "result = a - b",
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setupVars: func(st *compiler.SymbolTable) {
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st.AddVar("a", "", compiler.KindByte, 20)
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st.AddVar("b", "", compiler.KindByte, 10)
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st.AddVar("result", "", compiler.KindWord, 0)
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},
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wantAsm: []string{
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"\tsec",
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"\tlda a",
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"\tsbc b",
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"\tsta result",
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"\tlda #0",
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"\tsbc #0",
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"\tsta result+1",
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},
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},
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{
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name: "word - word -> word",
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line: "result = x - y",
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setupVars: func(st *compiler.SymbolTable) {
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st.AddVar("x", "", compiler.KindWord, 0x2000)
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st.AddVar("y", "", compiler.KindWord, 0x1000)
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st.AddVar("result", "", compiler.KindWord, 0)
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},
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wantAsm: []string{
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"\tsec",
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"\tlda x",
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"\tsbc y",
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"\tsta result",
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"\tlda x+1",
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"\tsbc y+1",
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"\tsta result+1",
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},
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},
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{
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name: "variable - literal",
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line: "result = a - 10",
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setupVars: func(st *compiler.SymbolTable) {
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st.AddVar("a", "", compiler.KindByte, 20)
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st.AddVar("result", "", compiler.KindByte, 0)
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},
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wantAsm: []string{
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"\tsec",
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"\tlda a",
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"\tsbc #$0a",
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"\tsta result",
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},
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},
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{
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name: "literal - variable",
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line: "result = 20 - b",
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setupVars: func(st *compiler.SymbolTable) {
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st.AddVar("b", "", compiler.KindByte, 10)
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st.AddVar("result", "", compiler.KindByte, 0)
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},
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wantAsm: []string{
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"\tsec",
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"\tlda #$14",
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"\tsbc b",
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"\tsta result",
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},
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},
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{
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name: "constant folding",
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line: "result = 100 - 25",
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setupVars: func(st *compiler.SymbolTable) {
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st.AddVar("result", "", compiler.KindByte, 0)
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},
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wantAsm: []string{
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"\tlda #$4b",
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"\tsta result",
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},
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},
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{
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name: "constant folding word",
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line: "result = $2000 - $1000",
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setupVars: func(st *compiler.SymbolTable) {
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st.AddVar("result", "", compiler.KindWord, 0)
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},
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wantAsm: []string{
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"\tlda #$00",
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"\tsta result",
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"\tlda #$10",
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"\tsta result+1",
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},
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},
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{
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name: "using constant in expression",
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line: "result = a - OFFSET",
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setupVars: func(st *compiler.SymbolTable) {
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st.AddVar("a", "", compiler.KindByte, 100)
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st.AddConst("OFFSET", "", compiler.KindByte, 10)
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st.AddVar("result", "", compiler.KindByte, 0)
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},
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wantAsm: []string{
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"\tsec",
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"\tlda a",
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"\tsbc #$0a",
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"\tsta result",
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},
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},
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{
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name: "word - byte -> word",
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line: "result = wval - bval",
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setupVars: func(st *compiler.SymbolTable) {
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st.AddVar("wval", "", compiler.KindWord, 0x1234)
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st.AddVar("bval", "", compiler.KindByte, 0x10)
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st.AddVar("result", "", compiler.KindWord, 0)
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},
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wantAsm: []string{
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"\tsec",
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"\tlda wval",
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"\tsbc bval",
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"\tsta result",
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"\tlda wval+1",
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"\tsbc #0",
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"\tsta result+1",
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},
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},
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{
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name: "error: unknown destination",
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line: "unknown = a - b",
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setupVars: func(st *compiler.SymbolTable) {
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st.AddVar("a", "", compiler.KindByte, 0)
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st.AddVar("b", "", compiler.KindByte, 0)
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},
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wantErr: true,
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},
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{
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name: "error: wrong operator",
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line: "result = a + b",
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setupVars: func(st *compiler.SymbolTable) {
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st.AddVar("a", "", compiler.KindByte, 0)
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st.AddVar("b", "", compiler.KindByte, 0)
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st.AddVar("result", "", compiler.KindByte, 0)
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},
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wantErr: true,
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},
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{
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name: "error: cannot assign to constant",
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line: "MAXVAL = a - b",
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setupVars: func(st *compiler.SymbolTable) {
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st.AddVar("a", "", compiler.KindByte, 0)
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st.AddVar("b", "", compiler.KindByte, 0)
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st.AddConst("MAXVAL", "", compiler.KindByte, 255)
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},
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wantErr: true,
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},
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}
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for _, tt := range tests {
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t.Run(tt.name, func(t *testing.T) {
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ctx := compiler.NewCompilerContext(&preproc.Pragma{})
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tt.setupVars(ctx.SymbolTable)
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cmd := &SubtractCommand{}
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line := preproc.Line{Text: tt.line, Kind: preproc.Source}
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err := cmd.Interpret(line, ctx)
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if tt.wantErr {
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if err == nil {
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t.Error("expected error, got nil")
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}
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return
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}
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if err != nil {
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t.Fatalf("Interpret() error = %v", err)
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}
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asm, err := cmd.Generate(ctx)
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if err != nil {
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t.Fatalf("Generate() error = %v", err)
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}
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if !equalAsmSubtr(asm, tt.wantAsm) {
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t.Errorf("Generate() mismatch\ngot:\n%s\nwant:\n%s",
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strings.Join(asm, "\n"),
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strings.Join(tt.wantAsm, "\n"))
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}
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})
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}
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}
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// equalAsmSubtr compares two assembly slices for equality
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func equalAsmSubtr(a, b []string) bool {
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if len(a) != len(b) {
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return false
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}
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for i := range a {
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if a[i] != b[i] {
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return false
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}
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}
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return true
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}
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