func Test_prepareCall(t *testing.T) {
// this is never going to be called, so it's OK that it's nil
var fn_dummy func(argsource types.ArgSource) (types.FuObject, []error)
var dummy1, dummy2 types.FuCallable
dummy1 = types.NewFixedFunction("dummy1", 0, fn_dummy)
dummy2 = types.NewFixedFunction("dummy1", 1, fn_dummy)
rt := minimalRuntime()
ns := rt.Namespace()
ns.Assign("dummy1", dummy1)
ns.Assign("dummy2", dummy2)
ns.Assign("x", types.MakeFuString("whee!"))
noargs := []dsl.ASTExpression{}
onearg := []dsl.ASTExpression{dsl.NewASTString("\"meep\"")}
var astcall *dsl.ASTFunctionCall
var callable types.FuCallable
var args RuntimeArgs
var errs []error
// correct (no args) call to dummy1()
astcall = dsl.NewASTFunctionCall(dsl.NewASTName("dummy1"), noargs)
callable, args, errs = rt.prepareCall(astcall)
assert.Equal(t, 0, len(errs))
assert.Equal(t, dummy1, callable)
assert.Equal(t, []types.FuObject{}, args.Args())
// and to dummy2()
astcall = dsl.NewASTFunctionCall(dsl.NewASTName("dummy2"), onearg)
callable, args, errs = rt.prepareCall(astcall)
assert.Equal(t, 0, len(errs))
assert.Equal(t, dummy2, callable)
assert.Equal(t, []types.FuObject{types.MakeFuString("meep")}, args.Args())
// attempt to call dummy2() incorrectly (1 arg, but it's an undefined name)
astcall = dsl.NewASTFunctionCall(
dsl.NewASTName("dummy2"),
[]dsl.ASTExpression{dsl.NewASTName("bogus")})
callable, _, errs = rt.prepareCall(astcall)
assert.Equal(t, 1, len(errs))
assert.Equal(t, "name not defined: 'bogus'", errs[0].Error())
// attempt to call non-existent function
astcall = dsl.NewASTFunctionCall(dsl.NewASTName("bogus"), noargs)
callable, _, errs = rt.prepareCall(astcall)
assert.Nil(t, callable)
assert.Equal(t, 1, len(errs))
assert.Equal(t, "name not defined: 'bogus'", errs[0].Error())
// attempt to call something that is not a function
astcall = dsl.NewASTFunctionCall(dsl.NewASTName("x"), noargs)
callable, _, errs = rt.prepareCall(astcall)
assert.Nil(t, callable)
assert.Equal(t, 1, len(errs))
assert.Equal(t, "not a function or method: 'x'", errs[0].Error())
}
func Test_SequenceAction_create(t *testing.T) {
rt := &Runtime{}
action := NewSequenceAction()
assert.Equal(t, 0, len(action.subactions))
// Execute() on an empty SequenceAction does nothing, silently
assert.Nil(t, action.Execute(rt))
// action 1 is a bare string: "ls -lR foo/bar"
cmd := dsl.NewASTString("\"ls -lR foo/bar\"")
action.AddCommand(cmd)
// action 2: a = "foo"
assign := dsl.NewASTAssignment(
"a",
dsl.NewASTString("foo"))
action.AddAssignment(assign)
// action 3: remove("*.o")
fcall := dsl.NewASTFunctionCall(
dsl.NewASTString("remove"),
[]dsl.ASTExpression{dsl.NewASTString("\"*.c\"")})
action.AddFunctionCall(fcall)
assert.Equal(t, 3, len(action.subactions))
assert.Equal(t,
"ls -lR foo/bar",
action.subactions[0].(*CommandAction).raw.ValueString())
}
func Test_evaluateCall_method(t *testing.T) {
// construct AST for "a.b.c(x)"
astargs := []dsl.ASTExpression{dsl.NewASTName("x")}
astcall := dsl.NewASTFunctionCall(
dsl.NewASTSelection(
dsl.NewASTSelection(dsl.NewASTName("a"), "b"), "c"),
astargs)
// make sure a is an object with attributes, and b is one of them
// (N.B. having FileNodes be attributes of one another is weird
// and would never happen in a real Fubsy script, but it's a
// convenient way to setup this method call)
aobj := dag.NewFileNode("a.txt")
bobj := dag.NewFileNode("b.txt")
aobj.ValueMap = types.NewValueMap()
aobj.Assign("b", bobj)
// make sure a.b.c is a method
calls := make([]string, 0) // list of function names
var meth_c types.FuCode
meth_c = func(argsource types.ArgSource) (types.FuObject, []error) {
args := argsource.Args()
if len(args) != 1 {
panic("c() called with wrong number of args")
}
calls = append(calls, "c")
robj := argsource.Receiver()
return nil, []error{
fmt.Errorf("c failed: receiver: %s %v, arg: %s %v",
robj.Typename(), robj, args[0].Typename(), args[0])}
}
bobj.ValueMap = types.NewValueMap()
bobj.Assign("c", types.NewFixedFunction("c", 1, meth_c))
rt := minimalRuntime()
ns := rt.Namespace()
ns.Assign("a", aobj)
ns.Assign("x", types.MakeFuString("hello"))
// what the hell, let's test the precall feature too
var precalledCallable types.FuCallable
var precalledArgs types.ArgSource
precall := func(callable types.FuCallable, argsource types.ArgSource) {
precalledCallable = callable
precalledArgs = argsource
}
callable, args, errs := rt.prepareCall(astcall)
assert.Equal(t, "c", callable.(*types.FuFunction).Name())
assert.True(t, args.Receiver() == bobj)
assert.Equal(t, 0, len(errs))
result, errs := rt.evaluateCall(callable, args, precall)
assert.Equal(t, precalledCallable, callable)
assert.Equal(t, precalledArgs.Args(), types.MakeStringList("hello").List())
assert.Nil(t, result)
if len(errs) == 1 {
assert.Equal(t,
"c failed: receiver: FileNode \"b.txt\", arg: string \"hello\"",
errs[0].Error())
} else {
t.Errorf("expected exactly 1 error, but got: %v", errs)
}
}