package lang import ( "reflect" "strconv" "testing" "github.com/hashicorp/terraform/config/lang/ast" ) func TestEval(t *testing.T) { cases := []struct { Input string Scope *ast.BasicScope Error bool Result interface{} ResultType ast.Type }{ { "foo", nil, false, "foo", ast.TypeString, }, { "foo ${bar}", &ast.BasicScope{ VarMap: map[string]ast.Variable{ "bar": ast.Variable{ Value: "baz", Type: ast.TypeString, }, }, }, false, "foo baz", ast.TypeString, }, { "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, }, { "foo ${42%4}", nil, false, "foo 2", ast.TypeString, }, { "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, }, { "foo ${bar+1}", &ast.BasicScope{ VarMap: map[string]ast.Variable{ "bar": ast.Variable{ Value: 41, Type: ast.TypeInt, }, }, }, false, "foo 42", ast.TypeString, }, { "foo ${rand()}", &ast.BasicScope{ FuncMap: map[string]ast.Function{ "rand": ast.Function{ ReturnType: ast.TypeString, Callback: func([]interface{}) (interface{}, error) { return "42", nil }, }, }, }, false, "foo 42", ast.TypeString, }, { `foo ${rand("foo", "bar")}`, &ast.BasicScope{ FuncMap: map[string]ast.Function{ "rand": ast.Function{ 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}", &ast.BasicScope{ VarMap: map[string]ast.Variable{ "bar": ast.Variable{ Value: 42, Type: ast.TypeInt, }, }, }, false, "foo 42", ast.TypeString, }, { `foo ${foo("42")}`, &ast.BasicScope{ FuncMap: map[string]ast.Function{ "foo": ast.Function{ 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, }, } for _, tc := range cases { node, err := Parse(tc.Input) if err != nil { t.Fatalf("Error: %s\n\nInput: %s", err, tc.Input) } out, outType, err := Eval(node, &EvalConfig{GlobalScope: tc.Scope}) if (err != nil) != tc.Error { 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) } } }