How to use TestErrors method of ast Package

Best Syzkaller code snippet using ast.TestErrors

evaluator_add_test.go

Source:evaluator_add_test.go

1package evaluator2import (3	"monkey/ast"4	"monkey/lexer"5	"monkey/object"6	"monkey/parser"7	"monkey/token"8	"testing"9)10//TODO: specify error messages11func TestArityCallExpressions(t *testing.T) {12	tests := []struct {13		input  string14		expErr bool15		errmsg string16	}{17		// to be specified: error msg18		{"let truther = fn(x){false}; truther()", true, "not enough"},19		{"let id = fn(x){x}; id()", true, "not enough"},20		{"let add = fn(x,y){x+y}; add(2)", true, "not enough"},21		// regression22		{"let zero = fn(){0}; zero()", false, ""},23		{"let truther = fn(x){false}; truther(1)", false, ""},24		{"let id = fn(x){x}; id(1)", false, ""},25		{"let add = fn(x,y){x+y}; add(1,2)", false, ""},26		// to be specified: whether we want an error + error msg27		{"let zero = fn(){0}; zero(1)", false, ""},28		{"let zero = fn(){0}; zero(1,2,3)", false, ""},29		{"let truther = fn(x){false}; truther(1,2)", true, "too many"},30		{"let id = fn(x){x}; id(1,2)", true, "too many"},31		{"let add = fn(x,y){x+y}; add(1,2,3)", true, "too many"},32	}33	for _, tt := range tests {34		l := lexer.New(tt.input)35		p := parser.New(l)36		ast := p.ParseProgram()37		if len(p.Errors()) > 0 {38			t.Errorf("Unexpected parse errors for %q", tt.input) // either wrong test setup or bugs in parser39			continue40		}41		// we are testing specifically for runtime errors in evaluation42		testErrors(tt.input, ast, tt.expErr, tt.errmsg, t)43	}44}45//TODO: specify error messages46func TestDivisionByZero(t *testing.T) {47	tests := []struct {48		input  string49		expErr bool50		errmsg string51	}{52		{"3/0", true, "shame on you"},      // literally zero53		{"-3/(1-1)", true, "shame on you"}, // evaluating to zero54		{"0/1", false, ""},                 // regression55	}56	for _, tt := range tests {57		l := lexer.New(tt.input)58		p := parser.New(l)59		ast := p.ParseProgram()60		if len(p.Errors()) > 0 {61			t.Errorf("Unexpected parse errors for %q", tt.input) // either wrong test setup or bugs in parser62			continue63		}64		// we are testing specifically for runtime errors in evaluation65		testErrors(tt.input, ast, tt.expErr, tt.errmsg, t)66	}67}68func testErrors(input string, ast *ast.Program, expErr bool, expMsg string, t *testing.T) {69	env := object.NewEnvironment()70	defer func() {71		if err := recover(); err != nil {72			t.Errorf("Evaluation panics for %q: %q", input, err)73		}74	}()75	value := Eval(ast, env)76	errobj, hasErr := value.(*object.Error)77	if expErr && !hasErr {78		t.Errorf("Error missing for: %q", input)79		return80	}81	if !expErr && hasErr {82		t.Errorf("Unexpected error message for %q: %q", input, errobj.Message)83	}84	if expErr && hasErr && errobj.Message != expMsg {85		t.Errorf("Wrong error message for %q: %q (should be %q)", input, errobj.Message, expMsg)86	}87}88func TestEvalToBoolConsistency(t *testing.T) {89	env, tests := setupEvalToBoolean()90	for _, tt := range tests {91		env.Set("a", tt.object)92		expr1 := "if(a){true} else {false}"93		expr2 := "!!a"94		if evaluate(expr1, env, t) != evaluate(expr2, env, t) {95			t.Errorf("inconsistent evaluation to bool for: %q ", tt.description)96		}97	}98}99func TestEvalToBoolCorrectness(t *testing.T) {100	env, tests := setupEvalToBoolean()101	for _, tt := range tests {102		env.Set("a", tt.object)103		result := evaluate("!!a", env, t)104		switch tt.expected {105		case "true":106			if result != TRUE {107				t.Errorf("%s does not evaluate to true", tt.description)108			}109		case "false":110			if result != FALSE {111				t.Errorf("%s does not evaluate to false", tt.description)112			}113		case "error":114			if result.Type() != "ERROR" {115				t.Errorf("%s does not evaluate to an error", tt.description)116			}117		default:118			t.Errorf("test setup fails, since expectation %q not yet implemented", tt.expected)119		}120	}121}122// needs specification123func setupEvalToBoolean() (*object.Environment, []struct {124	object      object.Object125	description string126	expected    string127}) {128	// prep: create environment and build the function object (fn(){})129	env := object.NewEnvironment()130	params := []*ast.Identifier{}131	body := &ast.BlockStatement{132		Token: token.Token{Type: token.LBRACE, Literal: "{"}}133	body.Statements = []ast.Statement{}134	functionObj := &object.Function{Parameters: params, Env: env, Body: body}135	// create testdata136	tests := []struct {137		object      object.Object138		description string139		expected    string //TODO: better interface{} - but then we need to specify the errormessages!140	}{141		{TRUE, "Boolean with value true", "true"},142		{FALSE, "Boolean with value false", "false"},143		{&object.Integer{Value: -1},144			"Integer with negative value", "error"},145		{&object.Integer{Value: 0},146			"Integer with zero value", "error"},147		{&object.Integer{Value: 1},148			"Integer with positive value", "error"},149		{NULL, "Null", "error"},150		{&object.Error{Message: ""}, "Error", "error"},151		{functionObj, "Function", "error"},152		{nil, "nil", "true"},153	}154	return env, tests155}156func evaluate(input string, env *object.Environment, t *testing.T) object.Object {157	l := lexer.New(input)158	p := parser.New(l)159	ast := p.ParseProgram()160	return Eval(ast, env)161}...

parser_test.go

Source:parser_test.go

1package parser2import (3	"fmt"4	"github.com/antlr/antlr4/runtime/Go/antlr"5	"gopkg.in/yaml.v2"6	"io/ioutil"7	"testing"8)9type ParserTestInputData struct {10	Cases []ParseTestInputCase `yaml:"cases"`11}12type ParseTestInputCase struct {13	Name string `yaml:"name"`14	Input string `yaml:"quark"`15	Expect string `yaml:"expect"`16}17type TestErrorListener struct {18	errorCount int19}20func (t *TestErrorListener) SyntaxError(recognizer antlr.Recognizer, offendingSymbol interface{}, line, column int, msg string, e antlr.RecognitionException) {21	fmt.Printf("syntax error line %d:%d\n", line, column)22	t.errorCount += 123}24func (t *TestErrorListener) ReportAmbiguity(recognizer antlr.Parser, dfa *antlr.DFA, startIndex, stopIndex int, exact bool, ambigAlts *antlr.BitSet, configs antlr.ATNConfigSet) {25	println("ambiguity error")26	t.errorCount += 127}28func (t *TestErrorListener) ReportAttemptingFullContext(recognizer antlr.Parser, dfa *antlr.DFA, startIndex, stopIndex int, conflictingAlts *antlr.BitSet, configs antlr.ATNConfigSet) {29}30func (t *TestErrorListener) ReportContextSensitivity(recognizer antlr.Parser, dfa *antlr.DFA, startIndex, stopIndex, prediction int, configs antlr.ATNConfigSet) {31}32func testCheckError(err error, t *testing.T) {33	if err != nil {34		t.Errorf("error %e\n", err)35	}36}37func TestParsePackage(t *testing.T) {38	testData, err := ioutil.ReadFile("parser_test_data.yml")39	testCheckError(err, t)40	inputData := ParserTestInputData{}41	err = yaml.Unmarshal(testData, &inputData)42	testCheckError(err, t)43	for _, testCase := range inputData.Cases {44		testname := testCase.Name45		t.Run(testname, func(t *testing.T) {46			defer func() {47				if r := recover(); r != nil && testCase.Expect == "valid" {48					fmt.Println(r)49					t.Errorf("expected no errors but got parser panic")50				}51			}()52			parser := NewStringParser(testCase.Input)53			testErrors := TestErrorListener{}54			parser.AddErrorListener(&testErrors)55			parser.GetPackageAST()56			if testCase.Expect == "valid" && testErrors.errorCount > 0 {57				t.Errorf("expected no errors but got %d errors", testErrors.errorCount)58			} else if testCase.Expect == "invalid" && testErrors.errorCount == 0 {59				t.Errorf("expected parser error but got 0 errors")60			}61		})62	}63}...

TestErrors

Using AI Code Generation

1import (2func main() {3    f, err := parser.ParseFile(fset, "2.go", nil, parser.ParseComments)4    if err != nil {5        fmt.Println(err)6    }7    ast.Print(fset, &ast.CompositeLit{Type: f})8}9import (10func main() {11    f, err := parser.ParseFile(fset, "3.go", nil, parser.ParseComments)12    if err != nil {13        fmt.Println(err)

TestErrors

Using AI Code Generation

1import (2func main() {3    f, err := parser.ParseFile(fset, "2.go", nil, parser.ParseComments)4    if err != nil {5        fmt.Println(err)6    }7    fmt.Println(f.Name)8    if f.Comments != nil {9        for _, comment := range f.Comments {10            fmt.Println(comment.Text())11        }12    }13    if f.Decls != nil {14        for _, decl := range f.Decls {15            switch d := decl.(type) {16                for _, spec := range d.Specs {17                    switch s := spec.(type) {18                        fmt.Println(s.Path.Value)19                    }20                }21            }22        }23    }24}

TestErrors

Using AI Code Generation

1import (2func main() {3import "fmt"4func main() {5	fmt.Println("Hello, playground")6}7	fset := token.NewFileSet()8	f, err := parser.ParseFile(fset, "", src, 0)9	if err != nil {10		panic(err)11	}12	fmt.Println(f.Name.Name)13	for _, s := range f.Imports {14		fmt.Println(s.Path.Value)15	}16	for _, d := range f.Decls {17		f, ok := d.(*ast.FuncDecl)18		if !ok {19		}20		fmt.Println(f.Name.Name)21	}22}23import (24func main() {25import "fmt"26func main() {27	fmt.Println("Hello, playground")28}29	fset := token.NewFileSet()30	f, err := parser.ParseFile(fset, "", src, 0)31	if err != nil {32		panic(err)33	}34	fmt.Println(f.Name.Name)35	for _, s := range f.Imports {36		fmt.Println(s.Path.Value)37	}38	for _, d := range f.Decls {39		f, ok := d.(*ast.FuncDecl)40		if !ok {41		}42		fmt.Println(f.Name.Name)43	}44}45import (46func main() {47import "fmt"48func main() {49	fmt.Println("Hello, playground")50}51	fset := token.NewFileSet()52	f, err := parser.ParseFile(fset, "", src, 0)53	if err != nil {54		panic(err)55	}56	fmt.Println(f.Name.Name)57	for _, s := range f.Imports {58		fmt.Println(s.Path.Value)59	}60	for _, d := range f.Decls {61		f, ok := d.(*ast.FuncDecl)62		if !ok {

TestErrors

Using AI Code Generation

1import (2func main() {3    func main() {4        fmt.Println("Hello, World!")5    }`6    f, err := parser.ParseFile(fset, "hello.go", src, 0)7    if err != nil {8        fmt.Println(err)9    }10    ast.Print(fset, f)11    err = ast.Print(fset, f)12    if err != nil {13        fmt.Println(err)14    }15    err = ast.Print(nil, f)16    if err != nil {17        fmt.Println(err)18    }19}20func main() {21    fmt.Println("Hello, World!")22}23func main() {24    fmt.Println("Hello, World!")25}26func main() {27    fmt.Println("Hello, World!")28}

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