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evaluator_test.go
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evaluator_test.go
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package evaluator
import (
"flag"
"fmt"
"io/ioutil"
"os"
"runtime"
"strconv"
"strings"
"testing"
"github.com/abs-lang/abs/lexer"
"github.com/abs-lang/abs/object"
"github.com/abs-lang/abs/parser"
)
func logErrorWithPosition(t *testing.T, msg string, expected interface{}) {
errorStr := msg
expected, _ = expected.(string)
expectedStr := fmt.Sprintf("%s", expected)
if strings.HasPrefix(errorStr, expectedStr) {
// Only log when we're running the verbose tests
if flag.Lookup("test.v").Value.String() == "true" {
t.Log("expected error:", errorStr)
}
} else {
expectedStr = fmt.Sprintf("ERROR: wrong error message. expected='%s',", expectedStr)
t.Error(expectedStr, "\ngot=", errorStr)
}
}
func TestEvalFloatExpression(t *testing.T) {
tests := []struct {
input string
expected float64
}{
{"5.5", 5.5},
{"-5.5", -5.5},
{"5.5 + 3.7", 9.2},
{"5.5 * 2", 11},
{"1 / 3", 0.3333333333333333},
}
for _, tt := range tests {
evaluated := testEval(tt.input)
testNumberObject(t, evaluated, tt.expected)
}
}
func TestEvalNumberAbbreviations(t *testing.T) {
tests := []struct {
input string
expected float64
}{
{"5k", 5000},
{"1m / 1M", 1},
}
for _, tt := range tests {
evaluated := testEval(tt.input)
testNumberObject(t, evaluated, tt.expected)
}
}
func TestEvalNumberExpression(t *testing.T) {
tests := []struct {
input string
expected float64
}{
{"1e1", 10},
{"1e-1", 0.1},
{"1e+1", 10},
{"1_000e1", 10000},
{"10_000_000", 10000000},
{"10_0.00_00", 100.0000},
{"5.5", 5.5},
{"1.1 + 2.1", 3.2},
{"5.5 + 2.2", 7.7},
{"5", 5},
{"10", 10},
{"-5", -5},
{"-10", -10},
{"5 + 5 + 5 + 5 - 10", 10},
{"2 * 2 * 2 * 2 * 2", 32},
{"-50 + 100 + -50", 0},
{"5 * 2 + 10", 20},
{"5 + 2 * 10", 25},
{"20 + 2 * -10", 0},
{"50 / 2 * 2 + 10", 60},
{"2 * (5 + 10)", 30},
{"3 * 3 * 3 + 10", 37},
{"3 * (3 * 3) + 10", 37},
{"(5 + 10 * 2 + 15 / 3) * 2 + -10", 50},
{"2 ** 2", 4},
{"10 ** 0", 1},
{"10 ** 0 - 1", 0},
{"10 && 0", 0},
{"10 && 1", 1},
{"0 && 3", 0},
{`"hello" && 10`, 10},
{"0 <=> 1", -1},
{"1 <=> 1", 0},
{"2 <=> 1", 1},
{"2 % 1", 0},
{"3 % 2", 1},
{"a = 5; a += 1; a", 6},
{"a = 5; a -= 1; a", 4},
{"a = 10; a /= 2; a", 5},
{"a = 5; a *= 2; a", 10},
{"a = 5; a **= 2; a", 25},
{"a = 5; a %= 3; a", 2},
}
for _, tt := range tests {
evaluated := testEval(tt.input)
testNumberObject(t, evaluated, tt.expected)
}
}
func TestEvalStringExpression(t *testing.T) {
tests := []struct {
input string
expected string
}{
{"9999999999.str()", "9999999999"},
{"12.1.str()", "12.1"},
{`"\n"`, "\n"},
{`"\r"`, "\r"},
{`"\t"`, "\t"},
{"12.123456789.str()", "12.123456789"},
{`"nice 'escaping"`, "nice 'escaping"},
{`'nice "escaping"`, `nice "escaping"`},
{`'nice \'escaping`, `nice 'escaping`},
{`"nice \"escaping"`, `nice "escaping`},
{`"5"`, "5"},
{`'5'`, "5"},
{`'hello %s'.fmt("world")`, "hello world"},
}
for _, tt := range tests {
evaluated := testEval(tt.input)
testStringObject(t, evaluated, tt.expected)
}
}
func TestEvalBooleanExpression(t *testing.T) {
tests := []struct {
input string
expected bool
}{
{`"a" == "a"`, true},
{`"a" == "b"`, false},
{`"a" ~ "b"`, false},
{`"a" ~ "A"`, true},
{`1 ~ 1`, true},
{`1 ~ 1.5`, true},
{`2 ~ 1.5`, false},
{"true", true},
{"false", false},
{"1 < 2", true},
{"1 > 2", false},
{"1 < 1", false},
{"1 <= 1", true},
{"1 > 1", false},
{"1 >= 1", true},
{"0 >= 1", false},
{"1 == 1", true},
{"1 != 1", false},
{"1 == 2", false},
{"1 != 2", true},
{"true == true", true},
{"false == false", true},
{"true == false", false},
{"true != false", true},
{"false != true", true},
{"(1 < 2) == true", true},
{"(1 < 2) == false", false},
{"(1 > 2) == true", false},
{"(1 > 2) == false", true},
}
for _, tt := range tests {
evaluated := testEval(tt.input)
testBooleanObject(t, evaluated, tt.expected)
}
}
func TestLazyEvaluation(t *testing.T) {
tests := []struct {
input string
expected bool
}{
{`x = false; x && x.lines`, false},
{`y = true; y || y.lines`, true},
{`x = true; y = false; x || (y && y.ok)`, true},
{`true || 1..1000000000`, true},
{`false && 1..1000000000`, false},
}
for _, tt := range tests {
evaluated := testEval(tt.input)
testBooleanObject(t, evaluated, tt.expected)
}
}
func BenchmarkLazyEvaluation(b *testing.B) {
for i := 0; i < b.N; i++ {
testEval(`false && 1..` + strconv.Itoa(i))
}
}
func TestBangOperator(t *testing.T) {
tests := []struct {
input string
expected bool
}{
{"!true", false},
{"!false", true},
{`a = "hello"; !a.ok`, true},
{"!5", false},
{"!!true", true},
{"!!false", false},
{"!!5", true},
{"!!0", false},
{`!!""`, false},
}
for _, tt := range tests {
evaluated := testEval(tt.input)
testBooleanObject(t, evaluated, tt.expected)
}
}
func TestIfElseExpressions(t *testing.T) {
tests := []struct {
input string
expected interface{}
}{
{"if true { 10 }", 10},
{"if false { 10 }", nil},
{"if 1 { 10 }", 10},
{"if 1 < 2 { 10 }", 10},
{"if 1 > 2 { 10 }", nil},
{"if 1 > 2 { 10 } else { 20 }", 20},
{"if 1 < 2 { 10 } else { 20 }", 10},
{"if 3 > 2 { 1 } else if 1 > 0 {2} else if 5 > 0 {3} else {4}", 1},
{"if 1 > 2 { 1 } else if 1 > 0 {2} else if 5 > 0 {3} else {4}", 2},
{"if 1 > 2 { 1 } else if 1 > 1 {2} else if 5 > 0 {3} else {4}", 3},
{"if 1 > 2 { 1 } else if 1 > 1 {2} else if 5 > 10 {3} else {4}", 4},
}
for _, tt := range tests {
evaluated := testEval(tt.input)
integer, ok := tt.expected.(int)
if ok {
testNumberObject(t, evaluated, float64(integer))
} else {
testNullObject(t, evaluated)
}
}
}
func TestForExpressions(t *testing.T) {
tests := []struct {
input string
expected interface{}
}{
{`x = 0; for k = 0; k < 11; k = k + 1 { if k < 10 { break; }; x += k }; x`, 0},
{`x = 0; for k = 0; k < 11; k = k + 1 { if k < 10 { continue; }; x += k }; x`, 10},
{"a = 0; for x = 0; x < 10; x = x + 1 { a = a + 1}; a", 10},
{"a = 0; for x = 0; x < y; x = x + 1 { a = a + 1}; a", "identifier not found: y"},
{"a = 0; increment = f(x) {x+1}; for x = 0; x < 10; x = increment(x) { a = a + 1}; a", 10},
{`a = 0; for k = 0; k < 10; k = k + 1 { a = a + 1}; k`, "identifier not found: k"},
{`k = 100; for k = 0; k < 10; k = k { k = k + 1}; k`, 100},
{`k = 100; for k = y; k < 10; k = k { k = 9 }; k`, "identifier not found: y"},
{`k = 100; for k = 0; k <= 10; k = k { k = y }; k`, "identifier not found: y"},
}
for _, tt := range tests {
evaluated := testEval(tt.input)
integer, ok := tt.expected.(int)
if ok {
testNumberObject(t, evaluated, float64(integer))
} else {
errObj, ok := evaluated.(*object.Error)
if !ok {
t.Errorf("no error object returned. got=%T(%+v)", evaluated, evaluated)
continue
}
logErrorWithPosition(t, errObj.Message, tt.expected)
}
}
}
func TestBitwiseExpressions(t *testing.T) {
tests := []struct {
input string
expected interface{}
}{
{"1 & 1", 1},
{"1 & 1.1", 1},
{"1 & 0", 0},
{`1 & ""`, "type mismatch: NUMBER & STRING"},
{"1 ^ 1", 0},
{"1 ^ 1.1", 0},
{"1 ^ 0", 1},
{`1 ^ ""`, "type mismatch: NUMBER ^ STRING"},
{"1 | 1", 1},
{"1 | 1.1", 1},
{"1 | 0", 1},
{`1 | ""`, "type mismatch: NUMBER | STRING"},
{"1 >> 1", 0},
{"1 >> 1.1", 0},
{"1 >> 0", 1},
{`1 >> ""`, "type mismatch: NUMBER >> STRING"},
{"1 << 1", 2},
{"1 << 1.1", 2},
{"1 << 0", 1},
{`1 << ""`, "type mismatch: NUMBER << STRING"},
{"~1", -2},
{"~1.1", -2},
{"~0", -1},
{`~"abc"`, "Bitwise not (~) can only be applied to numbers, got STRING (abc)"},
}
for _, tt := range tests {
evaluated := testEval(tt.input)
integer, ok := tt.expected.(int)
if ok {
testNumberObject(t, evaluated, float64(integer))
} else {
errObj, ok := evaluated.(*object.Error)
if !ok {
t.Errorf("no error object returned. got=%T(%+v)", evaluated, evaluated)
continue
}
logErrorWithPosition(t, errObj.Message, tt.expected)
}
}
}
func TestStringWriters(t *testing.T) {
tests := []struct {
input string
content string
file string
}{
{`"abc" > "write.txt.ignore"`, "abc", "write.txt.ignore"},
{`"" > "append.txt.ignore"; "abc" >> "append.txt.ignore"; "abc" >> "append.txt.ignore"`, "abcabc", "append.txt.ignore"},
}
for _, tt := range tests {
evaluated := testEval(tt.input)
testBooleanObject(t, evaluated, true)
content, err := ioutil.ReadFile(tt.file)
if err != nil {
t.Errorf("unable to read file %s", tt.file)
}
if string(content) != tt.content {
t.Errorf("file content is wrong: wanted %s, got %s", tt.content, string(content))
}
}
}
func TestForInExpressions(t *testing.T) {
tests := []struct {
input string
expected interface{}
}{
{`x = 0; for v in 1..10 { if v < 10 { break; }; x += v }; x`, 0},
{`x = 0; for v in 1..10 { if v < 10 { continue; }; x += v }; x`, 10},
{"a = 1..3; b = 0; c = 0; for x in a { b = x }; for x in a { c = x }; c", 3}, // See: https://github.com/abs-lang/abs/issues/112
{"a = 0; for k, x in 1 { a = a + 1}; a", "'1' is a NUMBER, not an iterable, cannot be used in for loop"},
{"a = 0; for k, x in 1..10 { a = a + 1}; a", 10},
{"a = 0; for x in 1 { a = a + 1}; a", "'1' is a NUMBER, not an iterable, cannot be used in for loop"},
{"a = 0; for x in 1..10 { a = a + 1}; a", 10},
{`a = 0; for k, v in {"a": 10} { a = v}; a`, 10},
{`a = ""; b = "abc"; for k, v in {"a": 1, "b": 2, "c": 3} { a += k}; a == b`, true},
{`a = 0; for k, v in ["x", "y", "z"] { a = a + k}; a`, 3},
{`for k, v in ["x", "y", "z"] {}; k`, "identifier not found: k"},
{`for k, v in ["x", "y", "z"] {}; v`, "identifier not found: v"},
{`k = 100; for k, v in ["x", "y", "z"] {}; k`, 100},
{`v = 100; for k, v in ["x", "y", "z"] {}; v`, 100},
{`for k, v in ["x", "y", "z"] {k=y}; v`, "identifier not found: y"},
{`for k, v in ["x", "y", z] {k=y}; v`, "'ERROR: identifier not found: z"},
}
for _, tt := range tests {
evaluated := testEval(tt.input)
switch ev := tt.expected.(type) {
case int:
testNumberObject(t, evaluated, float64(ev))
case bool:
testBooleanObject(t, evaluated, ev)
default:
errObj, ok := evaluated.(*object.Error)
if !ok {
t.Errorf("no error object returned. got=%T(%+v)", evaluated, evaluated)
continue
}
logErrorWithPosition(t, errObj.Message, ev)
}
}
}
func TestForElseExpressions(t *testing.T) {
tests := []struct {
input string
expected interface{}
}{
{"a = 0; b = 1; for v in [] { x = a } else { x = b }; x", 1},
{"a = 100; x = 0; for i in 1..-1 { x = i } else { x = a }; x", 100},
{"v = 100; for k, v in [] { v = 0 } else {}; v", 100},
{"for k, v in [] {} else { x = v }; x", "identifier not found: v"},
{"a = 0; for k, v in [] { x = a } else { x = b }; x", "identifier not found: b"},
{"for k, v in [] { x = 0 } else { x = 100 }; z", "identifier not found: z"},
{"for i in 1..3 { x = i } else { x = 0 }; x", 3},
}
for _, tt := range tests {
evaluated := testEval(tt.input)
switch ev := tt.expected.(type) {
case int:
testNumberObject(t, evaluated, float64(ev))
case bool:
testBooleanObject(t, evaluated, ev)
default:
errObj, ok := evaluated.(*object.Error)
if !ok {
t.Errorf("no error object returned. got=%T(%+v)", evaluated, evaluated)
continue
}
logErrorWithPosition(t, errObj.Message, ev)
}
}
}
func TestWhileExpressions(t *testing.T) {
tests := []struct {
input string
expected interface{}
}{
{"while true { echo x }", "identifier not found: x"},
{"a = 0; while (a < 10) { a = a + 1 }; a", 10},
{`a = ""; while (len(a) < 3) { a = a + "a" }; a`, "aaa"},
}
for _, tt := range tests {
evaluated := testEval(tt.input)
switch tt.expected.(type) {
case int:
testNumberObject(t, evaluated, float64(tt.expected.(int)))
case string:
errObj, ok := evaluated.(*object.Error)
if !ok {
testStringObject(t, evaluated, tt.expected.(string))
continue
}
logErrorWithPosition(t, errObj.Message, tt.expected)
default:
panic("should not reach here")
}
}
}
func TestReturnStatements(t *testing.T) {
tests := []struct {
input string
expected interface{}
}{
{"return;", nil},
{"return", nil},
{"return 1", 1},
{"fn = f() { return }; fn()", nil},
{"fn = f() { return 1 }; fn()", 1},
{"return 10;", 10},
{"return 10; 9;", 10},
{"return 2 * 5; 9;", 10},
{"9; return 2 * 5; 9;", 10},
{"if (10 > 1) { return 10; }", 10},
{
`
if (10 > 1) {
if (10 > 1) {
return 10;
}
return 1;
}
`,
10,
},
{
`
fn = f(x) {
return x;
x + 10;
};
fn(10);`,
10,
},
{
`
fn = f(x) {
result = x + 10;
return result;
return 10;
};
fn(10);`,
20,
},
}
for _, tt := range tests {
evaluated := testEval(tt.input)
switch tt.expected.(type) {
case int:
testNumberObject(t, evaluated, float64(tt.expected.(int)))
case nil:
testNullObject(t, evaluated)
default:
panic("should not reach here")
}
}
}
func TestErrorHandling(t *testing.T) {
tests := []struct {
input string
expected interface{}
}{
{
"5 + true;",
"type mismatch: NUMBER + BOOLEAN",
},
{
"5 + true; 5;",
"type mismatch: NUMBER + BOOLEAN",
},
{
"-true",
"unknown operator: -BOOLEAN",
},
{
"true + false;",
"unknown operator: BOOLEAN + BOOLEAN",
},
{
"true + false + true + false;",
"unknown operator: BOOLEAN + BOOLEAN",
},
{
"5; true + false; 5",
"unknown operator: BOOLEAN + BOOLEAN",
},
{
`"Hello" - "World"`,
"unknown operator: STRING - STRING",
},
{
"if (10 > 1) { true + false; }",
"unknown operator: BOOLEAN + BOOLEAN",
},
{
`
if (10 > 1) {
if (10 > 1) {
return true + false;
}
return 1;
}
`,
"unknown operator: BOOLEAN + BOOLEAN",
},
{
"foobar",
"identifier not found: foobar",
},
{
// `{"name": "Abs"}[f(x) {x}];`,
`{"name": "Abs"}[f(x) {x}];`,
`index operator not supported: f(x) {x} on HASH`,
},
{
`999[1]`,
"index operator not supported: 1 on NUMBER",
},
}
for _, tt := range tests {
evaluated := testEval(tt.input)
errObj, ok := evaluated.(*object.Error)
if !ok {
t.Errorf("no error object returned. got=%T(%+v)",
evaluated, evaluated)
continue
}
logErrorWithPosition(t, errObj.Message, tt.expected)
}
}
func TestAssignStatements(t *testing.T) {
tests := []struct {
input string
expected interface{}
}{
{"a = 5; a;", 5},
{"a = 5 * 5; a;", 25},
{"a = 5; b = a; b;", 5},
{"a = 5; b = a; c = a + b + 5; c;", 15},
{"a, b, c = [1]; a;", 1},
{`a, b, c = {"a": 1}; a;`, 1},
{"a, b, c = [1]; b;", nil},
{`a, b, c = {"a": 1}; b;`, nil},
{`a = 10 + 1 + 2
b, c = [1, 2]; b`, 1},
{`a = 10 + 1 + 2
b, c = [1, 2]; a`, 13},
{`
tz = "10/20"
a, b = tz.split("/")
a.int()
`, 10},
}
for _, tt := range tests {
evaluated := testEval(tt.input)
switch expected := tt.expected.(type) {
case int:
testNumberObject(t, testEval(tt.input), float64(expected))
case string:
errObj, ok := evaluated.(*object.Error)
if !ok {
t.Errorf("object is not Error. got=%T (%+v)", evaluated, evaluated)
continue
}
logErrorWithPosition(t, errObj.Message, tt.expected)
}
}
}
func TestFunctionObject(t *testing.T) {
input := "f(x) { x + 2; };"
evaluated := testEval(input)
fn, ok := evaluated.(*object.Function)
if !ok {
t.Fatalf("object is not Function. got=%T (%+v)", evaluated, evaluated)
}
if len(fn.Parameters) != 1 {
t.Fatalf("function has wrong parameters. Parameters=%+v",
fn.Parameters)
}
if fn.Parameters[0].String() != "x" {
t.Fatalf("parameter is not 'x'. got=%q", fn.Parameters[0])
}
expectedBody := "(x + 2)"
if fn.Body.String() != expectedBody {
t.Fatalf("body is not %q. got=%q", expectedBody, fn.Body.String())
}
}
func TestFunctionApplication(t *testing.T) {
tests := []struct {
input string
expected interface{}
}{
{"identity = f(x) { x; }; identity(5);", 5},
{"identity = f(x) { return x; }; identity(5);", 5},
{"double = f(x) { x * 2; }; double(5);", 10},
{"add = f(x, y) { x + y; }; add(5, 5);", 10},
{"add = f(x, y) { x + y; }; add(5 + 5, add(5, 5));", 20},
{"f(x) { x; }(5)", 5},
{"f(x) { x; }()", "Wrong number of arguments passed to f(x) {x}. Want [x], got []"},
}
for _, tt := range tests {
evaluated := testEval(tt.input)
switch expected := tt.expected.(type) {
case string:
errObj, ok := evaluated.(*object.Error)
if !ok {
t.Errorf("no error object returned. got=%T(%+v)", evaluated, evaluated)
continue
}
logErrorWithPosition(t, errObj.Message, tt.expected)
case float64:
testNumberObject(t, evaluated, float64(expected))
}
}
}
func TestEnclosingEnvironments(t *testing.T) {
input := `
first = 10;
second = 10;
third = 10;
ourFunction = f(first) {
second = 20;
first + second + third;
};
ourFunction(20) + first + second;`
testNumberObject(t, testEval(input), float64(70))
}
func TestClosures(t *testing.T) {
input := `
newAdder = f(x) {
f(y) { x + y };
};
addTwo = newAdder(2);
addTwo(2);`
testNumberObject(t, testEval(input), float64(4))
}
func TestStringLiteral(t *testing.T) {
input := `"Hello World!"`
evaluated := testEval(input)
str, ok := evaluated.(*object.String)
if !ok {
t.Fatalf("object is not String. got=%T (%+v)", evaluated, evaluated)
}
if str.Value != "Hello World!" {
t.Errorf("String has wrong value. got=%q", str.Value)
}
}
func TestStringConcatenation(t *testing.T) {
input := `"Hello" + " " + "World!"`
evaluated := testEval(input)
str, ok := evaluated.(*object.String)
if !ok {
t.Fatalf("object is not String. got=%T (%+v)", evaluated, evaluated)
}
if str.Value != "Hello World!" {
t.Errorf("String has wrong value. got=%q", str.Value)
}
}
func TestArrayConcatenation(t *testing.T) {
input := `[1] + [2]`
evaluated := testEval(input)
arr, ok := evaluated.(*object.Array)
if !ok {
t.Fatalf("object is not Array. got=%T (%+v)", evaluated, evaluated)
}
testNumberObject(t, arr.Elements[0], float64(1))
testNumberObject(t, arr.Elements[1], float64(2))
}
func TestBuiltinFunctions(t *testing.T) {
tests := []struct {
input string
expected interface{}
}{
{`[1,2,3,3,2,1].unique()`, []int{1, 2, 3}},
{`[1,2,"a"].map(int)`, "int(...) can only be called on strings which represent numbers, 'a' given"},
{`[1,2,"a"].filter(int)`, "int(...) can only be called on strings which represent numbers, 'a' given"},
{`[1, null].sum()`, "sum(...) can only be called on an homogeneous array, got [1, null]"},
{`[null, null].sum()`, "sum(...) can only be called on arrays of numbers, got [null, null]"},
{`[].sum()`, 0},
{`[1, 2].sum()`, 3},
{`[1].map(f(x) { y = x + 1 }).str()`, "[null]"},
{`find([1,2,3,3], f(x) {x == 3})`, 3},
{`find([1,2], f(x) {x == "some"})`, nil},
{`arg("o")`, "argument 0 to arg(...) is not supported (got: o, allowed: NUMBER)"},
{`arg(3)`, ""},
{`pwd().split("").reverse().slice(0, 33).reverse().join("").replace("\\", "/", -1).suffix("/evaluator")`, true}, // Little trick to get travis to run this test, as the base path is not /go/src/
{`cwd = cd(); cwd == pwd()`, true},
{`cwd = cd("path/to/nowhere"); cwd == pwd()`, false},
{`rand(1)`, 0},
{`int(10)`, 10},
{`int(10.5)`, 10},
{`number("aaa")`, "number(...) can only be called on strings which represent numbers, 'aaa' given"},
{`is_number("aaa")`, false},
{`is_number("123")`, true},
{`is_number("123.33")`, true},
{`is_number(123)`, true},
{`is_number(123.33)`, true},
{`number("10")`, 10},
{`number("10.55")`, 10.55},
{`int("10")`, 10},
{`int("10.5")`, 10},
{`int("abc")`, `int(...) can only be called on strings which represent numbers, 'abc' given`},
{`int([])`, "argument 0 to int(...) is not supported (got: [], allowed: NUMBER, STRING)"},
{`len("")`, 0},
{`len("four")`, 4},
{`len("hello world")`, 11},
{`len(1)`, "argument 0 to len(...) is not supported (got: 1, allowed: STRING, ARRAY)"},
{`len("one", "two")`, "wrong number of arguments to len(...): got=2, want=1"},
{`len([1, 2, 3])`, 3},
{`len([])`, 0},
{`echo("hello", "world!")`, nil},
{`env("CONTEXT")`, "abs"},
{`type("SOME")`, "STRING"},
{`type(1)`, "NUMBER"},
{`type({})`, "HASH"},
{`type([])`, "ARRAY"},
{`type("{}".json())`, "HASH"},
{`"{\"a\": null}".json().a`, nil},
{`type(null)`, "NULL"},
{`"{\"k\": \"v\"}".json()["k"]`, "v"},
{`''.json()`, ""},
{`' '.json()`, ""},
{`"2".json()`, 2},
{`'"2"'.json()`, "2"},
{`'true'.json()`, true},
{`'null'.json()`, nil},
{`'"hello"'.json()`, "hello"},
{`'[1, 2, 3]'.json()`, []int{1, 2, 3}},
{`'"hello'.json()`, "argument to `json` must be a valid JSON object, got '\"hello'"},
{`split("a\"b\"c", "\"")`, []string{"a", "b", "c"}},
{`lines("a
b
c")`, []string{"a", "b", "c"}},
{`[1, 2].sort()`, []int{1, 2}},
{`["b", "a"].sort()`, []string{"a", "b"}},
{`["b", 1].sort()`, `argument to 'sort' must be an homogeneous array (elements of the same type), got ["b", 1]`},
{`[{}].sort()`, "cannot sort an array with given elements elements ([{}])"},
{`[[]].sort()`, "cannot sort an array with given elements elements ([[]])"},
{`[1, 2].some(f(x) {x == 2})`, true},
{`[].some(f(x) {x})`, false},
{`[1, 2].every(f(x) { return x == 2 || x == 1})`, true},
{`[].every(f(x) {x})`, true},
{`[1,2,3].every(f(x) {x == 1})`, false},
{`[1,2,3].filter(f(x) {x == 1})`, []int{1}},
{`[].shift()`, nil},
{`[1, 2].shift()`, 1},
{`a = [1, 2]; a.shift(); a`, []int{2}},
{`[1, 2].reverse();`, []int{2, 1}},
{`[1, 2].push("a");`, []interface{}{1, 2, "a"}},
{`[1, 2].pop();`, 2},
{`a = [1, 2]; a.pop(); a`, []int{1}},
{`[1, 2].keys()`, []int{0, 1}},
{`[1, 2].join("-")`, "1-2"},
{`["a", "b"].join("-")`, "a-b"},
{`"a".any("b")`, false},
{`"a".any("a")`, true},
{`"a".prefix("b")`, false},
{`"a".prefix("a")`, true},
{`"a".suffix("b")`, false},
{`"a".suffix("a")`, true},
{`"ab".index("b")`, 1},
{`"a".index("b")`, nil},
{`"abb".last_index("b")`, 2},
{`"a".last_index("b")`, nil},
{`"a".repeat(3)`, "aaa"},
{`"a".repeat(3)`, "aaa"},
{`"abc".slice(0, 0)`, "abc"},
{`"abc".slice(1, 0)`, "bc"},
{`"abc".slice(1, 2)`, "b"},
{`"abc".slice(0, 6)`, "abc"},
{`"abc".slice(10, 10)`, ""},
{`"abc".slice(10, 20)`, ""},
{`"abc".slice(-1, 0)`, "c"},
{`"abc".slice(-20, 0)`, "abc"},
{`"abc".slice(-20, 2)`, "ab"},
{`"abc".slice(-1, 3)`, "c"},
{`"abc".slice(-1, 1)`, "c"},
{`"hello %s".fmt("world")`, "hello world"},
{`"hello %s".fmt()`, "hello %!s(MISSING)"},
{`"hello %s".fmt(1)`, "hello 1"},
{`"hello %s".fmt({})`, "hello {}"},
{`[1,2,3].slice(0, 0)`, []int{1, 2, 3}},
{`[1,2,3].slice(1, 0)`, []int{2, 3}},
{`[1,2,3].slice(1, 2)`, []int{2}},
{`[1,2,3].slice(0, 6)`, []int{1, 2, 3}},
{`[1,2,3].slice(10, 10)`, []int{}},
{`[1,2,3].slice(10, 20)`, []int{}},
{`[1,2,3].slice(-1, 0)`, []int{3}},
{`[1,2,3].slice(-20, 0)`, []int{1, 2, 3}},
{`[1,2,3].slice(-20, 2)`, []int{1, 2}},
{`[1,2,3].slice(-1, 3)`, []int{3}},
{`[1,2,3].slice(-1, 1)`, []int{3}},
{`"a".replace("a", "b", -1)`, "b"},
{`"a".replace("a", "b")`, "b"},
{`"ac".replace(["a", "c"], "b", -1)`, "bb"},
{`"ac".replace(["a", "c"], "b")`, "bb"},
{`"a".str()`, "a"},
{`1.str()`, "1"},
{`[1].str()`, "[1]"},
{`{"a": 10}.str()`, `{"a": 10}`},
{`"a great movie".title()`, "A Great Movie"},
{`"A great movie".lower()`, "a great movie"},
{`"A great movie".upper()`, "A GREAT MOVIE"},
{`" A great movie ".trim()`, "A great movie"},
{`" A great movie ".trim_by(" A")`, "great movie"},
{`sleep(1000)`, nil},
{`1.round()`, 1},
{`1.round(2)`, 1.00},
{`1.23.round(1)`, 1.2},
{`1.66.round(1)`, 1.7},
{`"1.23".round(1)`, 1.2},
{`"1.66".round(1)`, 1.7},
{`1.floor()`, 1},
{`1.floor()`, 1},
{`1.23.floor()`, 1},
{`1.66.floor()`, 1},
{`"1.23".floor()`, 1},
{`"1.66".floor()`, 1},
{`1.ceil()`, 1},
{`1.ceil()`, 1},
{`1.23.ceil()`, 2},
{`1.66.ceil()`, 2},
{`"1.23".ceil()`, 2},
{`"1.66".ceil()`, 2},
{`sleep(0.01)`, nil},
{`$()`, ""},
{`a = 1; eval("a")`, 1},
}
for _, tt := range tests {
evaluated := testEval(tt.input)
switch expected := tt.expected.(type) {
case int:
testNumberObject(t, evaluated, float64(expected))
case float64:
testNumberObject(t, evaluated, float64(expected))
case nil:
testNullObject(t, evaluated)
case bool:
testBooleanObject(t, evaluated, expected)
case string:
s, ok := evaluated.(*object.String)
if ok {
if s.Value != tt.expected.(string) {
t.Errorf("result is not the right string for '%s'. got='%s', want='%s'", tt.input, s.Value, tt.expected)
}
continue
}
errObj, ok := evaluated.(*object.Error)
if !ok {
t.Errorf("object is not Error. got=%T (%+v)", evaluated, evaluated)
continue
}
logErrorWithPosition(t, errObj.Message, tt.expected)
case []int:
array, ok := evaluated.(*object.Array)
if !ok {
t.Errorf("obj not Array. got=%T (%+v)", evaluated, evaluated)
continue
}
if len(array.Elements) != len(expected) {
t.Errorf("wrong num of elements. want=%d, got=%d",
len(expected), len(array.Elements))
continue
}
for i, expectedElem := range expected {
testNumberObject(t, array.Elements[i], float64(expectedElem))
}
case []string:
array, ok := evaluated.(*object.Array)
if !ok {
t.Errorf("obj not Array. got=%T (%+v)", evaluated, evaluated)
continue
}
if len(array.Elements) != len(expected) {
t.Errorf("wrong num of elements. want=%d, got=%d", len(expected), len(array.Elements))
continue
}
for i, expectedElem := range expected {
testStringObject(t, array.Elements[i], expectedElem)
}
case []interface{}:
array, ok := evaluated.(*object.Array)
if !ok {
t.Errorf("obj not Array. got=%T (%+v)", evaluated, evaluated)
continue
}
if len(array.Elements) != len(expected) {
t.Errorf("wrong num of elements. want=%d, got=%d", len(expected), len(array.Elements))
continue
}