terraform/config/expr_parse_test.go

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package config
import (
"reflect"
"testing"
)
func TestExprParse(t *testing.T) {
cases := []struct {
Input string
Result Interpolation
Error bool
}{
{
"foo",
nil,
true,
},
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{
`"foo"`,
&LiteralInterpolation{Literal: "foo"},
false,
},
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{
"var.foo",
&VariableInterpolation{
Variable: &UserVariable{
Name: "foo",
key: "var.foo",
},
},
false,
},
{
"lookup(var.foo, var.bar)",
&FunctionInterpolation{
Func: nil, // Funcs["lookup"]
Args: []Interpolation{
&VariableInterpolation{
Variable: &UserVariable{
Name: "foo",
key: "var.foo",
},
},
&VariableInterpolation{
Variable: &UserVariable{
Name: "bar",
key: "var.bar",
},
},
},
},
false,
},
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{
"lookup(var.foo, lookup(var.baz, var.bar))",
&FunctionInterpolation{
Func: nil, // Funcs["lookup"]
Args: []Interpolation{
&VariableInterpolation{
Variable: &UserVariable{
Name: "foo",
key: "var.foo",
},
},
&FunctionInterpolation{
Func: nil, // Funcs["lookup"]
Args: []Interpolation{
&VariableInterpolation{
Variable: &UserVariable{
Name: "baz",
key: "var.baz",
},
},
&VariableInterpolation{
Variable: &UserVariable{
Name: "bar",
key: "var.bar",
},
},
},
},
},
},
false,
},
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}
for i, tc := range cases {
actual, err := ExprParse(tc.Input)
if (err != nil) != tc.Error {
t.Fatalf("%d. Error: %s", i, err)
}
// This is jank, but reflect.DeepEqual never has functions
// being the same.
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f, ok := actual.(*FunctionInterpolation)
if ok {
fs := make([]*FunctionInterpolation, 1)
fs[0] = f
for len(fs) > 0 {
f := fs[0]
fs = fs[1:]
f.Func = nil
for _, a := range f.Args {
f, ok := a.(*FunctionInterpolation)
if ok {
fs = append(fs, f)
}
}
}
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}
if !reflect.DeepEqual(actual, tc.Result) {
t.Fatalf("%d bad: %#v", i, actual)
}
}
}