package exprhelpers import ( "log" "testing" "github.com/antonmedv/expr" "github.com/stretchr/testify/assert" ) func TestJsonExtract(t *testing.T) { if err := Init(nil); err != nil { log.Fatal(err) } err := FileInit(TestFolder, "test_data_re.txt", "regex") if err != nil { log.Fatal(err) } tests := []struct { name string jsonBlob string targetField string expectResult string expr string }{ { name: "basic json extract", jsonBlob: `{"test" : "1234"}`, targetField: "test", expectResult: "1234", expr: "JsonExtract(blob, target)", }, { name: "basic json extract with non existing field", jsonBlob: `{"test" : "1234"}`, targetField: "non_existing_field", expectResult: "", expr: "JsonExtract(blob, target)", }, { name: "extract subfield", jsonBlob: `{"test" : {"a": "b"}}`, targetField: "test.a", expectResult: "b", expr: "JsonExtract(blob, target)", }, } for _, test := range tests { t.Run(test.name, func(t *testing.T) { env := map[string]interface{}{ "blob": test.jsonBlob, "target": test.targetField, } vm, err := expr.Compile(test.expr, GetExprOptions(env)...) assert.NoError(t, err) out, err := expr.Run(vm, env) assert.NoError(t, err) assert.Equal(t, test.expectResult, out) }) } } func TestJsonExtractUnescape(t *testing.T) { if err := Init(nil); err != nil { log.Fatal(err) } err := FileInit(TestFolder, "test_data_re.txt", "regex") if err != nil { log.Fatal(err) } tests := []struct { name string jsonBlob string targetField string expectResult string expr string }{ { name: "basic json extract", jsonBlob: `{"log" : "\"GET /JBNwtQ6i.blt HTTP/1.1\" 200 13 \"-\" \"Craftbot\""}`, targetField: "log", expectResult: "\"GET /JBNwtQ6i.blt HTTP/1.1\" 200 13 \"-\" \"Craftbot\"", expr: "JsonExtractUnescape(blob, target)", }, { name: "basic json extract with non existing field", jsonBlob: `{"test" : "1234"}`, targetField: "non_existing_field", expectResult: "", expr: "JsonExtractUnescape(blob, target)", }, } for _, test := range tests { t.Run(test.name, func(t *testing.T) { env := map[string]interface{}{ "blob": test.jsonBlob, "target": test.targetField, } vm, err := expr.Compile(test.expr, GetExprOptions(env)...) assert.NoError(t, err) out, err := expr.Run(vm, env) assert.NoError(t, err) assert.Equal(t, test.expectResult, out) }) } } func TestJsonExtractSlice(t *testing.T) { if err := Init(nil); err != nil { log.Fatal(err) } err := FileInit(TestFolder, "test_data_re.txt", "regex") if err != nil { log.Fatal(err) } tests := []struct { name string jsonBlob string targetField string expectResult []interface{} expr string }{ { name: "try to extract a string as a slice", jsonBlob: `{"test" : "1234"}`, targetField: "test", expectResult: nil, expr: "JsonExtractSlice(blob, target)", }, { name: "basic json slice extract", jsonBlob: `{"test" : ["1234"]}`, targetField: "test", expectResult: []interface{}{"1234"}, expr: "JsonExtractSlice(blob, target)", }, { name: "extract with complex expression", jsonBlob: `{"test": {"foo": [{"a":"b"}]}}`, targetField: "test.foo", expectResult: []interface{}{map[string]interface{}{"a": "b"}}, expr: "JsonExtractSlice(blob, target)", }, { name: "extract non-existing key", jsonBlob: `{"test: "11234"}`, targetField: "foo", expectResult: nil, expr: "JsonExtractSlice(blob, target)", }, } for _, test := range tests { test := test t.Run(test.name, func(t *testing.T) { env := map[string]interface{}{ "blob": test.jsonBlob, "target": test.targetField, } vm, err := expr.Compile(test.expr, GetExprOptions(env)...) assert.NoError(t, err) out, err := expr.Run(vm, env) assert.NoError(t, err) assert.Equal(t, test.expectResult, out) }) } } func TestJsonExtractObject(t *testing.T) { if err := Init(nil); err != nil { log.Fatal(err) } err := FileInit(TestFolder, "test_data_re.txt", "regex") if err != nil { log.Fatal(err) } tests := []struct { name string jsonBlob string targetField string expectResult map[string]interface{} expr string }{ { name: "try to extract a string as an object", jsonBlob: `{"test" : "1234"}`, targetField: "test", expectResult: nil, expr: "JsonExtractObject(blob, target)", }, { name: "basic json object extract", jsonBlob: `{"test" : {"1234": {"foo": "bar"}}}`, targetField: "test", expectResult: map[string]interface{}{"1234": map[string]interface{}{"foo": "bar"}}, expr: "JsonExtractObject(blob, target)", }, { name: "extract with complex expression", jsonBlob: `{"test": {"foo": [{"a":"b"}]}}`, targetField: "test.foo[0]", expectResult: map[string]interface{}{"a": "b"}, expr: "JsonExtractObject(blob, target)", }, } for _, test := range tests { test := test t.Run(test.name, func(t *testing.T) { env := map[string]interface{}{ "blob": test.jsonBlob, "target": test.targetField, } vm, err := expr.Compile(test.expr, GetExprOptions(env)...) assert.NoError(t, err) out, err := expr.Run(vm, env) assert.NoError(t, err) assert.Equal(t, test.expectResult, out) }) } } func TestToJson(t *testing.T) { err := Init(nil) assert.NoError(t, err) tests := []struct { name string obj interface{} expectResult string expr string }{ { name: "convert int", obj: 42, expectResult: "42", expr: "ToJsonString(obj)", }, { name: "convert slice", obj: []string{"foo", "bar"}, expectResult: `["foo","bar"]`, expr: "ToJsonString(obj)", }, { name: "convert map", obj: map[string]string{"foo": "bar"}, expectResult: `{"foo":"bar"}`, expr: "ToJsonString(obj)", }, { name: "convert struct", obj: struct{ Foo string }{"bar"}, expectResult: `{"Foo":"bar"}`, expr: "ToJsonString(obj)", }, { name: "convert complex struct", obj: struct { Foo string Bar struct { Baz string } Bla []string }{ Foo: "bar", Bar: struct { Baz string }{ Baz: "baz", }, Bla: []string{"foo", "bar"}, }, expectResult: `{"Foo":"bar","Bar":{"Baz":"baz"},"Bla":["foo","bar"]}`, expr: "ToJsonString(obj)", }, { name: "convert invalid type", obj: func() {}, expectResult: "", expr: "ToJsonString(obj)", }, } for _, test := range tests { t.Run(test.name, func(t *testing.T) { env := map[string]interface{}{ "obj": test.obj, } vm, err := expr.Compile(test.expr, GetExprOptions(env)...) assert.NoError(t, err) out, err := expr.Run(vm, env) assert.NoError(t, err) assert.Equal(t, test.expectResult, out) }) } }