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check_test.go
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// Copyright 2017 The OPA Authors. All rights reserved.
// Use of this source code is governed by an Apache2
// license that can be found in the LICENSE file.
package ast
import (
"encoding/json"
"fmt"
"reflect"
"strings"
"testing"
"github.com/open-policy-agent/opa/types"
"github.com/open-policy-agent/opa/util"
)
func TestCheckInference(t *testing.T) {
// fake_builtin_1([str1,str2])
RegisterBuiltin(&Builtin{
Name: "fake_builtin_1",
Decl: types.NewFunction(
nil,
types.NewArray(
[]types.Type{types.S, types.S}, nil,
),
),
})
// fake_builtin_2({"a":str1,"b":str2})
RegisterBuiltin(&Builtin{
Name: "fake_builtin_2",
Decl: types.NewFunction(
nil,
types.NewObject(
[]*types.StaticProperty{
{Key: "a", Value: types.S},
{Key: "b", Value: types.S},
}, nil,
),
),
})
// fake_builtin_3({str1,str2,...})
RegisterBuiltin(&Builtin{
Name: "fake_builtin_3",
Decl: types.NewFunction(
nil,
types.NewSet(types.S),
),
})
tests := []struct {
note string
query string
expected map[Var]types.Type
}{
{"trivial", `x = 1`, map[Var]types.Type{
Var("x"): types.N,
}},
{"one-level", "y = 1; x = y", map[Var]types.Type{
Var("x"): types.N,
Var("y"): types.N,
}},
{"two-level", "z = 1; y = z; x = y", map[Var]types.Type{
Var("x"): types.N,
Var("y"): types.N,
Var("z"): types.N,
}},
{"array-nested", "[x, 1] = [true, y]", map[Var]types.Type{
Var("x"): types.B,
Var("y"): types.N,
}},
{"array-transitive", "y = [[2], 1]; [[x], 1] = y", map[Var]types.Type{
Var("x"): types.N,
Var("y"): types.NewArray(
[]types.Type{
types.NewArray([]types.Type{types.N}, nil),
types.N,
}, nil),
}},
{"array-embedded", `[1, "2", x] = data.foo`, map[Var]types.Type{
Var("x"): types.A,
}},
{"object-nested", `{"a": "foo", "b": {"c": x}} = {"a": y, "b": {"c": 2}}`, map[Var]types.Type{
Var("x"): types.N,
Var("y"): types.S,
}},
{"object-transitive", `y = {"a": "foo", "b": 2}; {"a": z, "b": x} = y`, map[Var]types.Type{
Var("x"): types.N,
Var("z"): types.S,
}},
{"object-embedded", `{"1": "2", "2": x} = data.foo`, map[Var]types.Type{
Var("x"): types.A,
}},
{"object-numeric-key", `x = {1: 2}; y = 1; x[y]`, map[Var]types.Type{
Var("x"): types.NewObject([]*types.StaticProperty{{Key: json.Number("1"), Value: types.N}}, nil),
Var("y"): types.N,
}},
{"object-object-key", `x = {{{}: 1}: 1}`, map[Var]types.Type{
Var("x"): types.NewObject(
[]*types.StaticProperty{types.NewStaticProperty(
map[string]interface{}{
"{}": json.Number("1"),
},
types.N,
)},
nil,
),
}},
{"object-composite-ref-operand", `x = {{}: 1}; x[{}] = y`, map[Var]types.Type{
Var("x"): types.NewObject(
[]*types.StaticProperty{types.NewStaticProperty(
map[string]interface{}{},
types.N,
)},
nil,
),
Var("y"): types.N,
}},
{"sets", `x = {1, 2}; y = {{"foo", 1}, x}`, map[Var]types.Type{
Var("x"): types.NewSet(types.N),
Var("y"): types.NewSet(
types.NewAny(
types.NewSet(
types.NewAny(types.N, types.S),
),
types.NewSet(
types.N,
),
),
),
}},
{"sets-nested", `{"a", 1, 2} = {1,2,3}`, nil},
{"sets-composite-ref-operand", `s = {[1, 2], [3, 4]}; s[[x, y]]`, map[Var]types.Type{
Var("x"): types.N,
Var("y"): types.N,
Var("s"): types.NewSet(types.NewArray([]types.Type{types.N, types.N}, nil)),
}},
{"empty-composites", `
obj = {};
arr = [];
set = set();
obj[i] = v1;
arr[j] = v2;
set[v3];
obj = {"foo": "bar"};
arr = [1];
set = {1,2,3}
`, map[Var]types.Type{
Var("obj"): types.NewObject(nil, types.NewDynamicProperty(types.A, types.A)),
Var("i"): types.A,
Var("v1"): types.A,
Var("arr"): types.NewArray(nil, types.A),
Var("j"): types.N,
Var("v2"): types.A,
Var("set"): types.NewSet(types.A),
Var("v3"): types.A,
}},
{"empty-composite-property", `
obj = {};
obj.foo = x;
obj[i].foo = y
`, map[Var]types.Type{
Var("x"): types.A,
Var("y"): types.A,
}},
{"local-reference", `
a = [
1,
{
"foo": [
{"bar": null},
-1,
{"bar": true}
]
},
3];
x = a[1].foo[_].bar`, map[Var]types.Type{
Var("x"): types.NewAny(types.NewNull(), types.B),
}},
{"local-reference-var", `
a = [
{
"a": null,
"b": {
"foo": {
"c": {1,},
},
"bar": {
"c": {"hello",},
},
},
},
{
"a": null,
"b": {
"foo": {
"c": {1,},
},
"bar": {
"c": {true,},
},
},
},
];
x = a[i].b[j].c[k]
`, map[Var]types.Type{
Var("i"): types.N,
Var("j"): types.S,
Var("k"): types.NewAny(types.S, types.N, types.B),
Var("x"): types.NewAny(types.S, types.N, types.B),
}},
{"local-reference-var-any", `
a = [[], {}];
a[_][i]
`, map[Var]types.Type{
Var("i"): types.A,
}},
{"local-reference-nested", `
a = [["foo"], 0, {"bar": "baz"}, 2];
b = [0,1,2,3];
a[b[_]][k] = v
`, map[Var]types.Type{
Var("k"): types.NewAny(types.S, types.N),
}},
{"simple-built-in", "plus(1,2,x)", map[Var]types.Type{
Var("x"): types.N,
}},
{"simple-built-in-exists", "plus(1,2,x); plus(x,2,y)", map[Var]types.Type{
Var("x"): types.N,
Var("y"): types.N,
}},
{"array-builtin", `fake_builtin_1([x,"foo"])`, map[Var]types.Type{
Var("x"): types.S,
}},
{"object-builtin", `fake_builtin_2({"a": "foo", "b": x})`, map[Var]types.Type{
Var("x"): types.S,
}},
{"set-builtin", `fake_builtin_3({"foo", x})`, map[Var]types.Type{
Var("x"): types.S,
}},
{"array-comprehension-ref-closure", `a = [1,"foo",3]; x = [ i | a[_] = i ]`, map[Var]types.Type{
Var("x"): types.NewArray(nil, types.NewAny(types.N, types.S)),
}},
{"array-comprehension-var-closure", `x = 1; y = [ i | x = i ]`, map[Var]types.Type{
Var("y"): types.NewArray(nil, types.N),
}},
{"dynamic-object-value", `q = {"a": "b", "c": "d"}; {k: [v]} = {k: [q[k]]}`, map[Var]types.Type{
Var("k"): types.S,
Var("v"): types.A,
}},
{
note: "type unioning: arrays",
query: `x = [[1], ["foo"]]; x[_] = [y]`,
expected: map[Var]types.Type{
Var("y"): types.NewAny(
types.N, types.S,
),
},
},
{
note: "type unioning: sets",
query: `x = {[1], ["foo"]}; x[[y]]`,
expected: map[Var]types.Type{
Var("y"): types.NewAny(
types.N, types.S,
),
},
},
{
note: "type unioning: object values",
query: `x = {"a": [1], "b": ["foo"]}; x[_] = [y]`,
expected: map[Var]types.Type{
Var("y"): types.NewAny(
types.N, types.S,
),
},
},
}
for _, tc := range tests {
t.Run(tc.note, func(t *testing.T) {
body := MustParseBody(tc.query)
checker := newTypeChecker()
env := checker.Env(BuiltinMap)
env, err := checker.CheckBody(env, body)
if len(err) != 0 {
t.Fatalf("Unexpected error: %v", err)
}
for k, tpe := range tc.expected {
result := env.Get(k)
if tpe == nil {
if result != nil {
t.Errorf("Expected %v type to be unset but got: %v", k, result)
}
} else {
if result == nil {
t.Errorf("Expected to infer %v => %v but got nil", k, tpe)
} else if types.Compare(tpe, result) != 0 {
t.Errorf("Expected to infer %v => %v but got %v", k, tpe, result)
}
}
}
})
}
}
func TestCheckInferenceRules(t *testing.T) {
// Rules must have refs resolved, safe ordering, etc. Each pair is a
// (package path, rule) tuple. The test constructs the Rule objects to
// run the inference on from these inputs.
ruleset1 := [][2]string{
{`a`, `trivial = true { true }`},
{`a`, `complete = [{"foo": x}] { x = 1 }`},
{`a`, `partialset[{"foo": x}] { y = "bar"; x = y }`},
{`a`, `partialobj[x] = {"foo": y} { y = "bar"; x = y }`},
{`b`, `trivial_ref = x { x = data.a.trivial }`},
{`b`, `transitive_ref = [x] { y = data.b.trivial_ref; x = y }`},
{`c`, `else_kw = null { false } else = 100 { true } else = "foo" { true }`},
{`iteration`, `arr = [[1], ["two"], {"x": true}, ["four"]] { true }`},
{`iteration`, `values[x] { data.iteration.arr[_][_] = x } `},
{`iteration`, `keys[i] { data.iteration.arr[_][i] = _ } `},
{`disjunction`, `partialset[1] { true }`},
{`disjunction`, `partialset[x] { x = "foo" }`},
{`disjunction`, `partialset[3] { true }`},
{`disjunction`, `partialobj[x] = y { y = "bar"; x = "foo" }`},
{`disjunction`, `partialobj[x] = y { y = 100; x = "foo" }`},
{`disjunction`, `complete = 1 { true }`},
{`disjunction`, `complete = x { x = "foo" }`},
{`prefix.a.b.c`, `d = true { true }`},
{`prefix.i.j.k`, `p = 1 { true }`},
{`prefix.i.j.k`, `p = "foo" { true }`},
{`default_rule`, `default x = 1`},
{`default_rule`, `x = "foo" { true }`},
{`unknown_type`, `p = [x] { x = data.deadbeef }`},
{`nested_ref`, `inner = {"a": 0, "b": "1"} { true }`},
{`nested_ref`, `middle = [[1, true], ["foo", false]] { true }`},
{`nested_ref`, `p = x { data.nested_ref.middle[data.nested_ref.inner.a][0] = x }`},
{`number_key`, `q[x] = y { a = ["a", "b"]; y = a[x] }`},
{`non_leaf`, `p[x] { data.prefix.i[x][_] }`},
}
tests := []struct {
note string
rules [][2]string
ref string
expected types.Type
}{
{"trivial", ruleset1, `data.a.trivial`, types.B},
{"complete-doc", ruleset1, `data.a.complete`, types.NewArray(
[]types.Type{types.NewObject(
[]*types.StaticProperty{{
Key: "foo", Value: types.N,
}},
nil,
)},
nil,
)},
{"complete-doc-suffix", ruleset1, `data.a.complete[0].foo`, types.N},
{"else-kw", ruleset1, "data.c.else_kw", types.NewAny(types.NewNull(), types.N, types.S)},
{"partial-set-doc", ruleset1, `data.a.partialset`, types.NewSet(
types.NewObject(
[]*types.StaticProperty{{
Key: "foo", Value: types.S,
}},
nil,
),
)},
{"partial-object-doc", ruleset1, "data.a.partialobj", types.NewObject(
nil,
types.NewDynamicProperty(types.S, types.NewObject(
[]*types.StaticProperty{{
Key: "foo", Value: types.S,
}},
nil,
)),
)},
{"partial-object-doc-suffix", ruleset1, `data.a.partialobj.somekey.foo`, types.S},
{"partial-object-doc-number-suffix", ruleset1, "data.number_key.q[1]", types.S},
{"iteration", ruleset1, "data.iteration.values", types.NewSet(
types.NewAny(
types.S,
types.N,
types.B),
)},
{"iteration-keys", ruleset1, "data.iteration.keys", types.NewSet(
types.NewAny(
types.S,
types.N,
),
)},
{"disj-complete-doc", ruleset1, "data.disjunction.complete", types.NewAny(
types.S,
types.N,
)},
{"disj-partial-set-doc", ruleset1, "data.disjunction.partialset", types.NewSet(
types.NewAny(
types.S,
types.N),
)},
{"disj-partial-obj-doc", ruleset1, "data.disjunction.partialobj", types.NewObject(
nil,
types.NewDynamicProperty(types.S, types.NewAny(types.S, types.N)),
)},
{"ref", ruleset1, "data.b.trivial_ref", types.B},
{"ref-transitive", ruleset1, "data.b.transitive_ref", types.NewArray(
[]types.Type{
types.B,
},
nil,
)},
{"prefix", ruleset1, `data.prefix.a.b`, types.NewObject(
[]*types.StaticProperty{{
Key: "c", Value: types.NewObject(
[]*types.StaticProperty{{Key: "d", Value: types.B}},
types.NewDynamicProperty(types.S, types.A),
),
}},
types.NewDynamicProperty(types.S, types.A),
)},
// Check that prefixes that iterate fallback to any.
{"prefix-iter", ruleset1, `data.prefix.i.j[k]`, types.A},
// Check that iteration targeting a rule (but nonetheless prefixed) falls back to any.
{"prefix-iter-2", ruleset1, `data.prefix.i.j[k].p`, types.A},
{"default-rule", ruleset1, "data.default_rule.x", types.NewAny(
types.S,
types.N,
)},
{"unknown-type", ruleset1, "data.unknown_type.p", types.NewArray(
[]types.Type{
types.A,
},
nil,
)},
{"nested-ref", ruleset1, "data.nested_ref.p", types.NewAny(
types.S,
types.N,
)},
{"non-leaf", ruleset1, "data.non_leaf.p", types.NewSet(
types.S,
)},
}
for _, tc := range tests {
t.Run(tc.note, func(t *testing.T) {
var elems []util.T
// Convert test rules into rule slice for call.
for i := range tc.rules {
pkg := MustParsePackage(`package ` + tc.rules[i][0])
rule := MustParseRule(tc.rules[i][1])
module := &Module{
Package: pkg,
Rules: []*Rule{rule},
}
rule.Module = module
elems = append(elems, rule)
for next := rule.Else; next != nil; next = next.Else {
next.Module = module
elems = append(elems, next)
}
}
ref := MustParseRef(tc.ref)
checker := newTypeChecker()
env, err := checker.CheckTypes(nil, elems)
if err != nil {
t.Fatalf("Unexpected error %v:", err)
}
result := env.Get(ref)
if tc.expected == nil {
if result != nil {
t.Errorf("Expected %v type to be unset but got: %v", ref, result)
}
} else {
if result == nil {
t.Errorf("Expected to infer %v => %v but got nil", ref, tc.expected)
} else if types.Compare(tc.expected, result) != 0 {
t.Errorf("Expected to infer %v => %v but got %v", ref, tc.expected, result)
}
}
})
}
}
func TestCheckErrorSuppression(t *testing.T) {
query := `arr = [1,2,3]; arr[0].deadbeef = 1`
_, errs := newTypeChecker().CheckBody(nil, MustParseBody(query))
if len(errs) != 1 {
t.Fatalf("Expected exactly one error but got: %v", errs)
}
_, ok := errs[0].Details.(*RefErrUnsupportedDetail)
if !ok {
t.Fatalf("Expected ref error but got: %v", errs)
}
query = `_ = [true | count(1)]`
_, errs = newTypeChecker().CheckBody(newTypeChecker().Env(BuiltinMap), MustParseBody(query))
if len(errs) != 1 {
t.Fatalf("Expected exactly one error but got: %v", errs)
}
_, ok = errs[0].Details.(*ArgErrDetail)
if !ok {
t.Fatalf("Expected arg error but got: %v", errs)
}
}
func TestCheckBadCardinality(t *testing.T) {
tests := []struct {
body string
exp []types.Type
}{
{
body: "plus(1)",
exp: []types.Type{types.N},
},
{
body: "plus(1, 2, 3, 4)",
exp: []types.Type{types.N, types.N, types.N, types.N},
},
}
for _, test := range tests {
body := MustParseBody(test.body)
tc := newTypeChecker()
env := tc.Env(BuiltinMap)
_, err := tc.CheckBody(env, body)
if len(err) != 1 || err[0].Code != TypeErr {
t.Fatalf("Expected 1 type error from %v but got: %v", body, err)
}
detail, ok := err[0].Details.(*ArgErrDetail)
if !ok {
t.Fatalf("Expected argument error details but got: %v", err)
}
if len(test.exp) != len(detail.Have) {
t.Fatalf("Expected arg types %v but got: %v", test.exp, detail.Have)
}
for i := range test.exp {
if types.Compare(test.exp[i], detail.Have[i]) != 0 {
t.Fatalf("Expected types for %v to be %v but got: %v", body[0], test.exp, detail.Have)
}
}
}
}
func TestCheckMatchErrors(t *testing.T) {
tests := []struct {
note string
query string
}{
{"null", "null = true"},
{"boolean", "true = null"},
{"number", "1 = null"},
{"string", `"hello" = null`},
{"array", "[1,2,3] = null"},
{"array-nested", `[1,2,3] = [1,2,"3"]`},
{"array-nested-2", `[1,2] = [1,2,3]`},
{"array-dynamic", `[ true | true ] = [x | a = [1, "foo"]; x = a[_]]`},
{"object", `{"a": 1, "b": 2} = null`},
{"object-nested", `{"a": 1, "b": "2"} = {"a": 1, "b": 2}`},
{"object-nested-2", `{"a": 1} = {"a": 1, "b": "2"}`},
{"set", "{1,2,3} = null"},
{"any", `x = ["str", 1]; x[_] = null`},
}
for _, tc := range tests {
t.Run(tc.note, func(t *testing.T) {
body := MustParseBody(tc.query)
checker := newTypeChecker()
_, err := checker.CheckBody(nil, body)
if len(err) != 1 {
t.Fatalf("Expected exactly one error from %v, but got:\n%v", body, err)
}
})
}
}
func TestCheckBuiltinErrors(t *testing.T) {
RegisterBuiltin(&Builtin{
Name: "fake_builtin_2",
Decl: types.NewFunction(
types.Args(
types.NewAny(types.NewObject(
[]*types.StaticProperty{
{Key: "a", Value: types.S},
{Key: "b", Value: types.S},
}, nil),
),
),
types.NewObject(
[]*types.StaticProperty{
{Key: "b", Value: types.S},
{Key: "c", Value: types.S},
}, nil,
),
),
})
tests := []struct {
note string
query string
}{
{"trivial", "plus(true, 1, x)"},
{"refs", "x = [null]; plus(x[0], 1, y)"},
{"array comprehensions", `sum([null | true], x)`},
{"arrays-any", `sum([1,2,"3",4], x)`},
{"arrays-bad-input", `contains([1,2,3], "x")`},
{"objects-any", `fake_builtin_2({"a": a, "c": c})`},
{"objects-bad-input", `sum({"a": 1, "b": 2}, x)`},
{"sets-any", `sum({1,2,"3",4}, x)`},
{"virtual-ref", `plus(data.test.p, data.deabeef, 0)`},
}
env := newTestEnv([]string{
`p = "foo" { true }`,
`f(x) = x { true }`,
})
for _, tc := range tests {
t.Run(tc.note, func(t *testing.T) {
body := MustParseBody(tc.query)
checker := newTypeChecker()
_, err := checker.CheckBody(env, body)
if len(err) != 1 {
t.Fatalf("Expected exactly one error from %v but got:\n%v", body, err)
}
})
}
}
func TestVoidBuiltins(t *testing.T) {
// Void builtins are used in test cases.
RegisterBuiltin(&Builtin{
Name: "fake_void_builtin",
Decl: types.NewFunction(
types.Args(types.N),
nil,
),
})
tests := []struct {
query string
wantErr bool
}{
{"fake_void_builtin(1)", false},
{"fake_void_builtin()", true},
{"fake_void_builtin(1,2)", true},
{"fake_void_builtin(true)", true},
}
for _, tc := range tests {
body := MustParseBody(tc.query)
checker := newTypeChecker()
_, errs := checker.CheckBody(newTestEnv(nil), body)
if len(errs) != 0 && !tc.wantErr {
t.Fatal(errs)
} else if len(errs) == 0 && tc.wantErr {
t.Fatal("Expected error")
}
}
}
func TestCheckRefErrUnsupported(t *testing.T) {
query := `arr = [[1,2],[3,4]]; arr[1][0].deadbeef`
_, errs := newTypeChecker().CheckBody(nil, MustParseBody(query))
if len(errs) != 1 {
t.Fatalf("Expected exactly one error but got: %v", errs)
}
details, ok := errs[0].Details.(*RefErrUnsupportedDetail)
if !ok {
t.Fatalf("Expected ref err unsupported but got: %v", errs)
}
wantRef := MustParseRef(`arr[1][0].deadbeef`)
wantPos := 2
wantHave := types.N
if !wantRef.Equal(details.Ref) ||
wantPos != details.Pos ||
types.Compare(wantHave, details.Have) != 0 {
t.Fatalf("Expected (%v, %v, %v) but got: (%v, %v, %v)", wantRef, wantPos, wantHave, details.Ref, details.Pos, details.Have)
}
}
func TestCheckRefErrInvalid(t *testing.T) {
env := newTestEnv([]string{
`p { true }`,
`q = {"foo": 1, "bar": 2} { true }`,
})
tests := []struct {
note string
query string
ref string
pos int
have types.Type
want types.Type
oneOf []Value
}{
{
note: "bad non-leaf var",
query: `x = 1; data.test[x]`,
ref: `data.test[x]`,
pos: 2,
have: types.N,
want: types.S,
oneOf: []Value{String("p"), String("q")},
},
{
note: "bad non-leaf ref",
query: `arr = [1]; data.test[arr[0]]`,
ref: `data.test[arr[0]]`,
pos: 2,
have: types.N,
want: types.S,
oneOf: []Value{String("p"), String("q")},
},
{
note: "bad leaf ref",
query: `arr = [1]; data.test.q[arr[0]]`,
ref: `data.test.q[arr[0]]`,
pos: 3,
have: types.N,
want: types.S,
oneOf: []Value{String("bar"), String("foo")},
},
{
note: "bad leaf var",
query: `x = 1; data.test.q[x]`,
ref: `data.test.q[x]`,
pos: 3,
have: types.N,
want: types.S,
oneOf: []Value{String("bar"), String("foo")},
},
{
note: "bad array index value",
query: "arr = [[1,2],[3],[4]]; arr[0].dead.beef = x",
ref: "arr[0].dead.beef",
pos: 2,
want: types.N,
},
{
note: "bad set element value",
query: `s = {{1,2},{3,4}}; x = {1,2}; s[x].deadbeef`,
ref: "s[x].deadbeef",
pos: 2,
want: types.N,
},
{
note: "bad object key value",
query: `arr = [{"a": 1, "c": 3}, {"b": 2}]; arr[0].b`,
ref: "arr[0].b",
pos: 2,
want: types.S,
oneOf: []Value{String("a"), String("c")},
},
{
note: "bad non-leaf value",
query: `data.test[1]`,
ref: "data.test[1]",
pos: 2,
want: types.S,
oneOf: []Value{String("p"), String("q")},
},
{
note: "composite ref operand",
query: `data.test.q[[1, 2]]`,
ref: "data.test.q[[1, 2]]",
pos: 3,
have: types.NewArray([]types.Type{types.N, types.N}, nil),
want: types.S,
},
{
note: "composite ref type error 1",
query: `a = {[1], [2], [3]}; a[["foo"]]`,
ref: `a[["foo"]]`,
pos: 1,
have: types.NewArray([]types.Type{types.S}, nil),
want: types.NewArray([]types.Type{types.N}, nil),
},
{
note: "composite ref type error 2",
query: `a = {{"a": 2}}; a[{"a": "foo"}]`,
ref: `a[{"a": "foo"}]`,
pos: 1,
have: types.NewObject([]*types.StaticProperty{types.NewStaticProperty("a", types.S)}, nil),
want: types.NewObject([]*types.StaticProperty{types.NewStaticProperty("a", types.N)}, nil),
},
{
note: "composite ref type error 3 - array",
query: `a = [1,2,3]; a[{}] = b`,
ref: `a[{}]`,
pos: 1,
have: types.NewObject(nil, types.NewDynamicProperty(types.A, types.A)),
want: types.N,
},
}
for _, tc := range tests {
t.Run(tc.note, func(t *testing.T) {
_, errs := newTypeChecker().CheckBody(env, MustParseBody(tc.query))
if len(errs) != 1 {
t.Fatalf("Expected exactly one error but got: %v", errs)
}
details, ok := errs[0].Details.(*RefErrInvalidDetail)
if !ok {
t.Fatalf("Expected ref error invalid but got: %v", errs)
}
wantRef := MustParseRef(tc.ref)
if details.Pos != tc.pos ||
!details.Ref.Equal(wantRef) ||
types.Compare(details.Want, tc.want) != 0 ||
types.Compare(details.Have, tc.have) != 0 ||
!reflect.DeepEqual(details.OneOf, tc.oneOf) {
t.Fatalf("Expected (%v, %v, %v, %v, %v) but got: (%v, %v, %v, %v, %v)", wantRef, tc.pos, tc.have, tc.want, tc.oneOf, details.Ref, details.Pos, details.Have, details.Want, details.OneOf)
}
})
}
}
func TestFunctionsTypeInference(t *testing.T) {
functions := []string{
`foo([a, b]) = y { split(a, b, y) }`,
`bar(x) = y { count(x, y) }`,
`baz([x, y]) = z { sprintf("%s%s", [x, y], z) }`,
`qux({"bar": x, "foo": y}) = {a: b} { upper(y, a); json.unmarshal(x, b) }`,
`corge(x) = y { qux({"bar": x, "foo": x}, a); baz([a["{5: true}"], "BUZ"], y) }`,
}
body := strings.Join(functions, "\n")
base := fmt.Sprintf("package base\n%s", body)
c := NewCompiler()
if c.Compile(map[string]*Module{"base": MustParseModule(base)}); c.Failed() {
t.Fatalf("Failed to compile base module: %v", c.Errors)
}
tests := []struct {
body string
wantErr bool
}{
{
`fn(_) = y { data.base.foo(["hello", 5], y) }`,
true,
},
{
`fn(_) = y { data.base.foo(["hello", "ll"], y) }`,
false,
},
{
`fn(_) = y { data.base.baz(["hello", "ll"], y) }`,
false,
},
{
`fn(_) = y { data.base.baz([5, ["foo", "bar", true]], y) }`,
false,
},
{
`fn(_) = y { data.base.baz(["hello", {"a": "b", "c": 3}], y) }`,
false,
},
{
`fn(_) = y { data.base.corge("this is not json", y) }`,
false,
},
{
`fn(x) = y { data.non_existent(x, a); y = a[0] }`,
true,
},
{
`fn(x) = y { y = [x] }`,
false,
},
{
`f(x) = y { [x] = y }`,
false,
},
{
`fn(x) = y { y = {"k": x} }`,
false,
},
{
`f(x) = y { {"k": x} = y }`,
false,
},
{
`p { [data.base.foo] }`,
true,
},
{
`p { x = data.base.foo }`,
true,
},
{
`p { data.base.foo(data.base.bar) }`,
true,
},
}
for n, test := range tests {
t.Run(fmt.Sprintf("Test Case %d", n), func(t *testing.T) {
mod := MustParseModule(fmt.Sprintf("package test\n%s", test.body))
c := NewCompiler()
c.Compile(map[string]*Module{"base": MustParseModule(base), "mod": mod})
if test.wantErr && !c.Failed() {
t.Errorf("Expected error but got success")
} else if !test.wantErr && c.Failed() {
t.Errorf("Expected success but got error: %v", c.Errors)
}
})
}
}
func TestFunctionTypeInferenceUnappliedWithObjectVarKey(t *testing.T) {
// Run type inference on a function that constructs an object with a key
// from args in the head.
module := MustParseModule(`
package test
f(x) = y { y = {x: 1} }
`)
env, err := newTypeChecker().CheckTypes(newTypeChecker().Env(BuiltinMap), []util.T{
module.Rules[0],
})
if len(err) > 0 {
t.Fatal(err)
}
// Check inferred type for reference to function.
tpe := env.Get(MustParseRef("data.test.f"))
exp := types.NewFunction([]types.Type{types.A}, types.NewObject(nil, types.NewDynamicProperty(types.A, types.N)))
if types.Compare(tpe, exp) != 0 {
t.Fatalf("Expected %v but got %v", exp, tpe)
}
}
func TestCheckValidErrors(t *testing.T) {
module := MustParseModule(`
package test
p {
concat("", 1) # type error
}
q {
r(1)
}
r(x) = x`)
module2 := MustParseModule(`