terraform/config/lang/eval_test.go

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package lang
import (
"reflect"
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"strconv"
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"testing"
"github.com/hashicorp/terraform/config/lang/ast"
)
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func TestEval(t *testing.T) {
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cases := []struct {
Input string
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Scope *ast.BasicScope
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Error bool
Result interface{}
ResultType ast.Type
}{
{
"foo",
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nil,
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false,
"foo",
ast.TypeString,
},
{
"foo ${bar}",
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&ast.BasicScope{
VarMap: map[string]ast.Variable{
"bar": ast.Variable{
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Value: "baz",
Type: ast.TypeString,
},
},
},
false,
"foo baz",
ast.TypeString,
},
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{
"foo ${42+1}",
nil,
false,
"foo 43",
ast.TypeString,
},
{
"foo ${42-1}",
nil,
false,
"foo 41",
ast.TypeString,
},
{
"foo ${42*2}",
nil,
false,
"foo 84",
ast.TypeString,
},
{
"foo ${42/2}",
nil,
false,
"foo 21",
ast.TypeString,
},
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{
"foo ${42%4}",
nil,
false,
"foo 2",
ast.TypeString,
},
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{
"foo ${42.0+1.0}",
nil,
false,
"foo 43",
ast.TypeString,
},
{
"foo ${42.0+1}",
nil,
false,
"foo 43",
ast.TypeString,
},
{
"foo ${42+1.0}",
nil,
false,
"foo 43",
ast.TypeString,
},
{
"foo ${42+2*2}",
nil,
false,
"foo 88",
ast.TypeString,
},
{
"foo ${42+(2*2)}",
nil,
false,
"foo 46",
ast.TypeString,
},
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{
"foo ${bar+1}",
&ast.BasicScope{
VarMap: map[string]ast.Variable{
"bar": ast.Variable{
Value: 41,
Type: ast.TypeInt,
},
},
},
false,
"foo 42",
ast.TypeString,
},
{
"foo ${bar+1}",
&ast.BasicScope{
VarMap: map[string]ast.Variable{
"bar": ast.Variable{
Value: "41",
Type: ast.TypeString,
},
},
},
false,
"foo 42",
ast.TypeString,
},
{
"foo ${bar+baz}",
&ast.BasicScope{
VarMap: map[string]ast.Variable{
"bar": ast.Variable{
Value: "41",
Type: ast.TypeString,
},
"baz": ast.Variable{
Value: "1",
Type: ast.TypeString,
},
},
},
false,
"foo 42",
ast.TypeString,
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},
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{
"foo ${rand()}",
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&ast.BasicScope{
FuncMap: map[string]ast.Function{
"rand": ast.Function{
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ReturnType: ast.TypeString,
Callback: func([]interface{}) (interface{}, error) {
return "42", nil
},
},
},
},
false,
"foo 42",
ast.TypeString,
},
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{
`foo ${rand("foo", "bar")}`,
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&ast.BasicScope{
FuncMap: map[string]ast.Function{
"rand": ast.Function{
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ReturnType: ast.TypeString,
Variadic: true,
VariadicType: ast.TypeString,
Callback: func(args []interface{}) (interface{}, error) {
var result string
for _, a := range args {
result += a.(string)
}
return result, nil
},
},
},
},
false,
"foo foobar",
ast.TypeString,
},
// Testing implicit type conversions
{
"foo ${bar}",
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&ast.BasicScope{
VarMap: map[string]ast.Variable{
"bar": ast.Variable{
Value: 42,
Type: ast.TypeInt,
},
},
},
false,
"foo 42",
ast.TypeString,
},
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{
`foo ${foo("42")}`,
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&ast.BasicScope{
FuncMap: map[string]ast.Function{
"foo": ast.Function{
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ArgTypes: []ast.Type{ast.TypeInt},
ReturnType: ast.TypeString,
Callback: func(args []interface{}) (interface{}, error) {
return strconv.FormatInt(int64(args[0].(int)), 10), nil
},
},
},
},
false,
"foo 42",
ast.TypeString,
},
// Multiline
{
"foo ${42+\n1.0}",
nil,
false,
"foo 43",
ast.TypeString,
},
{
"foo ${-46}",
nil,
false,
"foo -46",
ast.TypeString,
},
{
"foo ${-46 + 5}",
nil,
false,
"foo -41",
ast.TypeString,
},
{
"foo ${46 + -5}",
nil,
false,
"foo 41",
ast.TypeString,
},
{
"foo ${-bar}",
&ast.BasicScope{
VarMap: map[string]ast.Variable{
"bar": ast.Variable{
Value: 41,
Type: ast.TypeInt,
},
},
},
false,
"foo -41",
ast.TypeString,
},
{
"foo ${5 + -bar}",
&ast.BasicScope{
VarMap: map[string]ast.Variable{
"bar": ast.Variable{
Value: 41,
Type: ast.TypeInt,
},
},
},
false,
"foo -36",
ast.TypeString,
},
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}
for _, tc := range cases {
node, err := Parse(tc.Input)
if err != nil {
t.Fatalf("Error: %s\n\nInput: %s", err, tc.Input)
}
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out, outType, err := Eval(node, &EvalConfig{GlobalScope: tc.Scope})
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if err != nil != tc.Error {
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t.Fatalf("Error: %s\n\nInput: %s", err, tc.Input)
}
if outType != tc.ResultType {
t.Fatalf("Bad: %s\n\nInput: %s", outType, tc.Input)
}
if !reflect.DeepEqual(out, tc.Result) {
t.Fatalf("Bad: %#v\n\nInput: %s", out, tc.Input)
}
}
}