melrōse musical expression player

package dsl import ( "strings" "testing" "github.com/emicklei/melrose/core" ) func newTestEvaluator() *Evaluator { return NewEvaluator(MockContext()) } func MockContext() core.Context { return core.PlayContext{ VariableStorage: NewVariableStore(), LoopControl: core.NoLooper, AudioDevice: testAudioDevice{}, } } func checkError(t *testing.T, err error) { t.Helper() if err != nil { t.Fatal(err) } } func eval(t *testing.T, expression string) any { t.Helper() lp := new(core.TestLooper) lp.SetBIAB(4) ctx := core.PlayContext{ VariableStorage: NewVariableStore(), LoopControl: lp, } r, err := NewEvaluator(ctx).EvaluateProgram(expression) checkError(t, err) return r } func mustError(t *testing.T, expression string, substring string) { t.Helper() lp := new(core.TestLooper) lp.SetBIAB(4) ctx := core.PlayContext{ VariableStorage: NewVariableStore(), LoopControl: lp, } _, err := NewEvaluator(ctx).EvaluateExpression(expression) if err == nil { t.Fatal("error expected") } if !strings.Contains(err.Error(), substring) { t.Fatalf("error message should contain [%s] but it [%s]", substring, err.Error()) } } func checkStorex(t *testing.T, r any, storex string) { t.Helper() if s, ok := r.(core.Storable); ok { if got, want := s.Storex(), storex; got != want { t.Errorf("got [%v:%T] want [%v:%T]", got, got, want, want) } } else { t.Errorf("result is not Storable : [%v:%T]", r, r) } }