func TestEvalFunctionNode_EvalFloat64_Sanity(t *testing.T) {
evaluator, err := stateful.NewEvalFunctionNode(&ast.FunctionNode{
Func: "abs",
Args: []ast.Node{
&ast.NumberNode{
IsFloat: true,
Float64: float64(-1),
},
},
})
if err != nil {
t.Fatalf("Failed to create node evaluator: %v", err)
}
result, err := evaluator.EvalFloat(stateful.NewScope(), stateful.CreateExecutionState())
if err != nil {
t.Errorf("Expected a result, but got error - %v", err)
return
}
if result != float64(1) {
t.Errorf("unexpected result: got: %T(%v), expected: float64(1)", result, result)
}
}
func TestEvalFunctionNode_FailedToEvaluateArgumentNodes(t *testing.T) {
// bool("value"), where in our case "value" won't exist
evaluator, err := stateful.NewEvalFunctionNode(&ast.FunctionNode{
Func: "bool",
Args: []ast.Node{
&ast.ReferenceNode{Reference: "value"},
},
})
if err != nil {
t.Fatalf("Failed to create node evaluator: %v", err)
}
result, err := evaluator.EvalBool(stateful.NewScope(), stateful.CreateExecutionState())
expectedError := errors.New("Failed to handle 1 argument: name \"value\" is undefined. Names in scope:")
if err == nil {
t.Errorf("Expected an error, but got nil error and result (%t)", result)
return
}
if strings.TrimSpace(err.Error()) != expectedError.Error() {
t.Errorf("Got unexpected error:\ngot: %v\nexpected: %v\n", err, expectedError)
}
}
func TestEvalFunctionNode_EvalInt64_KeepConsistentState(t *testing.T) {
evaluator, err := stateful.NewEvalFunctionNode(&ast.FunctionNode{
Func: "count",
Args: []ast.Node{},
})
if err != nil {
t.Fatalf("Failed to create node evaluator: %v", err)
}
executionState := stateful.CreateExecutionState()
// first evaluation
result, err := evaluator.EvalInt(stateful.NewScope(), executionState)
if err != nil {
t.Errorf("first evaluation: Expected a result, but got error - %v", err)
return
}
if result != int64(1) {
t.Errorf("first evaluation: unexpected result: got: %T(%v), expected: int64(1)", result, result)
}
// second evaluation
result, err = evaluator.EvalInt(stateful.NewScope(), executionState)
if err != nil {
t.Errorf("second evaluation: Expected a result, but got error - %v", err)
return
}
if result != int64(2) {
t.Errorf("second evaluation: unexpected result: got: %T(%v), expected: int64(2)", result, result)
}
}
func TestEvalFunctionNode_InvalidNodeAsArgument(t *testing.T) {
evaluator, err := stateful.NewEvalFunctionNode(&ast.FunctionNode{
Args: []ast.Node{&ast.CommentNode{}},
})
expectedError := errors.New("Failed to handle 1 argument: Given node type is not valid evaluation node: *ast.CommentNode")
if err == nil && evaluator != nil {
t.Error("Expected an error, but go nil error and evaluator")
return
}
if err.Error() != expectedError.Error() {
t.Errorf("Got unexpected error:\ngot: %v\nexpected: %v\n", err, expectedError)
}
}
func TestEvalFunctionNode_EvalBool_Sanity(t *testing.T) {
evaluator, err := stateful.NewEvalFunctionNode(&ast.FunctionNode{
Func: "bool",
Args: []ast.Node{&ast.StringNode{Literal: "true"}},
})
if err != nil {
t.Fatalf("Failed to create node evaluator: %v", err)
}
result, err := evaluator.EvalBool(stateful.NewScope(), stateful.CreateExecutionState())
if err != nil {
t.Errorf("Expected a result, but got error - %v", err)
return
}
if !result {
t.Errorf("unexpected result: got: %v, expected: true", result)
}
}
func TestEvalFunctionNode_AryMismatch(t *testing.T) {
evaluator, err := stateful.NewEvalFunctionNode(&ast.FunctionNode{
Func: "sigma",
Args: []ast.Node{&ast.BoolNode{Bool: true}},
})
if err != nil {
t.Fatalf("Failed to create node evaluator: %v", err)
}
result, err := evaluator.EvalFloat(stateful.NewScope(), stateful.CreateExecutionState())
expectedError := errors.New("error calling \"sigma\": value is not a float")
if err == nil {
t.Errorf("Expected an error, but got nil error and result (%v)", result)
return
}
if strings.TrimSpace(err.Error()) != expectedError.Error() {
t.Errorf("Got unexpected error:\ngot: %v\nexpected: %v\n", err, expectedError)
}
}
func TestEvalFunctionNode_UndefinedFunction(t *testing.T) {
evaluator, err := stateful.NewEvalFunctionNode(&ast.FunctionNode{
Func: "yosi_the_king",
Args: []ast.Node{},
})
if err != nil {
t.Fatalf("Failed to create node evaluator: %v", err)
}
result, err := evaluator.EvalBool(stateful.NewScope(), stateful.CreateExecutionState())
expectedError := errors.New("undefined function: \"yosi_the_king\"")
if err == nil {
t.Errorf("Expected an error, but got nil error and result (%t)", result)
return
}
if strings.TrimSpace(err.Error()) != expectedError.Error() {
t.Errorf("Got unexpected error:\ngot: %v\nexpected: %v\n", err, expectedError)
}
}
func TestEvalFunctionNode_EvalInt64_Reset(t *testing.T) {
evaluator, err := stateful.NewEvalFunctionNode(&ast.FunctionNode{
Func: "count",
Args: []ast.Node{},
})
if err != nil {
t.Fatalf("Failed to create node evaluator: %v", err)
}
executionState := stateful.CreateExecutionState()
// first evaluation
result, err := evaluator.EvalInt(stateful.NewScope(), executionState)
if err != nil {
t.Errorf("first evaluation: Expected a result, but got error - %v", err)
return
}
if result != int64(1) {
t.Errorf("first evaluation: unexpected result: got: %T(%v), expected: int64(1)", result, result)
}
// reset (we don't call ResetAll on ExecutionState in order to isolate the scope of this test)
for _, fnc := range executionState.Funcs {
fnc.Reset()
}
// second evaluation
result, err = evaluator.EvalInt(stateful.NewScope(), executionState)
if err != nil {
t.Errorf("second evaluation (after reset): Expected a result, but got error - %v", err)
return
}
if result != int64(1) {
t.Errorf("second evaluation (after reset): unexpected result: got: %T(%v), expected: int64(1)", result, result)
}
}
func TestEvalFunctionNode_ComplexNodes(t *testing.T) {
// pow("x" * 2, -"y") => pow(4, -1)
evaluator, err := stateful.NewEvalFunctionNode(&ast.FunctionNode{
Func: "pow",
Args: []ast.Node{
// "x" * 2
&ast.BinaryNode{
Operator: ast.TokenMult,
Left: &ast.ReferenceNode{Reference: "x"},
Right: &ast.NumberNode{IsFloat: true, Float64: float64(2)},
},
// -"y"
&ast.UnaryNode{
Operator: ast.TokenMinus,
Node: &ast.ReferenceNode{Reference: "y"},
},
},
})
if err != nil {
t.Fatalf("Failed to create node evaluator: %v", err)
}
scope := stateful.NewScope()
scope.Set("x", float64(2))
scope.Set("y", float64(1))
result, err := evaluator.EvalFloat(scope, stateful.CreateExecutionState())
if err != nil {
t.Errorf("Expected a result, but got error - %v", err)
return
}
if result != float64(0.25) {
t.Errorf("unexpected result: got: %T(%v), expected: float64(0.25)", result, result)
}
}