debug: Always including Input and Data variable scopes

even when there are no explicit `input` and `data` documents.

This makes discoverability of the scopes much better, as users will know to expect them.
Whereas, if it's only enabled/visible when there is an actual document, a user who
has not come across it before might not realize it should appear, and can therefore
be slow to realize scenarios where their setup is expecting an `input` document, but
is missing it for some reason.

Signed-off-by: Johan Fylling <[email protected]>

Author: johanfylling

Diff for: debug/debugger_test.go

@@ -1511,6 +1511,14 @@ func TestDebuggerScopeVariables(t *testing.T) {
 					name:           "Locals",
 					namedVariables: 0,
 				},
+				"Input (not provided)": {
+					name:           "Input (not provided)",
+					namedVariables: 0,
+				},
+				"Data (not provided)": {
+					name:           "Data (not provided)",
+					namedVariables: 0,
+				},
 			},
 		},
 		{
@@ -1543,6 +1551,10 @@ func TestDebuggerScopeVariables(t *testing.T) {
 						},
 					},
 				},
+				"Data (not provided)": {
+					name:           "Data (not provided)",
+					namedVariables: 0,
+				},
 			},
 		},
 		{
@@ -1580,6 +1592,10 @@ func TestDebuggerScopeVariables(t *testing.T) {
 						},
 					},
 				},
+				"Data (not provided)": {
+					name:           "Data (not provided)",
+					namedVariables: 0,
+				},
 			},
 		},
 		{
@@ -1644,6 +1660,14 @@ func TestDebuggerScopeVariables(t *testing.T) {
 						},
 					},
 				},
+				"Input (not provided)": {
+					name:           "Input (not provided)",
+					namedVariables: 0,
+				},
+				"Data (not provided)": {
+					name:           "Data (not provided)",
+					namedVariables: 0,
+				},
 			},
 		},
 		{
@@ -1662,6 +1686,14 @@ func TestDebuggerScopeVariables(t *testing.T) {
 						},
 					},
 				},
+				"Input (not provided)": {
+					name:           "Input (not provided)",
+					namedVariables: 0,
+				},
+				"Data (not provided)": {
+					name:           "Data (not provided)",
+					namedVariables: 0,
+				},
 			},
 		},
 		{
@@ -1684,6 +1716,14 @@ func TestDebuggerScopeVariables(t *testing.T) {
 					name:           "Locals",
 					namedVariables: 0,
 				},
+				"Input (not provided)": {
+					name:           "Input (not provided)",
+					namedVariables: 0,
+				},
+				"Data (not provided)": {
+					name:           "Data (not provided)",
+					namedVariables: 0,
+				},
 				"Result Set": {
 					name:           "Result Set",
 					namedVariables: 1,
@@ -1739,6 +1779,14 @@ func TestDebuggerScopeVariables(t *testing.T) {
 					name:           "Locals",
 					namedVariables: 0,
 				},
+				"Input (not provided)": {
+					name:           "Input (not provided)",
+					namedVariables: 0,
+				},
+				"Data (not provided)": {
+					name:           "Data (not provided)",
+					namedVariables: 0,
+				},
 				"Virtual Cache": {
 					name:           "Virtual Cache",
 					namedVariables: 2,
@@ -1766,6 +1814,10 @@ func TestDebuggerScopeVariables(t *testing.T) {
 					name:           "Locals",
 					namedVariables: 0,
 				},
+				"Input (not provided)": {
+					name:           "Input (not provided)",
+					namedVariables: 0,
+				},
 				"Data": {
 					name:           "Data",
 					namedVariables: 1,
@@ -1859,23 +1911,27 @@ func TestDebuggerScopeVariables(t *testing.T) {
 				if scope.Name() != expScope.name {
 					t.Errorf("Expected scope name %s, got %s", expScope.name, scope.Name())
 				}
+
 				if scope.NamedVariables() != expScope.namedVariables {
 					t.Errorf("Expected %d named variables, got %d", expScope.namedVariables, scope.NamedVariables())
 				}
-				if scope.VariablesReference() == 0 {
+
+				if scope.NamedVariables() > 0 && scope.VariablesReference() == 0 {
 					t.Errorf("Expected non-zero variables reference")
 				}
 
-				vars, err := s.Variables(scope.VariablesReference())
-				if err != nil {
-					t.Fatalf("Unexpected error: %v", err)
-				}
+				if expScope.namedVariables > 0 {
+					vars, err := s.Variables(scope.VariablesReference())
+					if err != nil {
+						t.Fatalf("Unexpected error: %v", err)
+					}
 
-				if len(vars) != expScope.namedVariables {
-					t.Fatalf("Expected nuber of variables to equal named variables for scope (%d), got %d", expScope.namedVariables, len(vars))
-				}
+					if len(vars) != expScope.namedVariables {
+						t.Fatalf("Expected nuber of variables to equal named variables for scope (%d), got %d", expScope.namedVariables, len(vars))
+					}
 
-				assertVariables(t, s, vars, expScope.variables)
+					assertVariables(t, s, vars, expScope.variables)
+				}
 			}
 		})
 	}

Diff for: debug/thread.go

@@ -360,6 +360,12 @@ func (t *thread) scopes(stackIndex int) []Scope {
 			variablesReference: t.inputVars(e),
 		}
 		scopes = append(scopes, inputScope)
+	} else {
+		inputScope := scope{
+			name:           "Input (not provided)",
+			namedVariables: 0,
+		}
+		scopes = append(scopes, inputScope)
 	}
 
 	if t.store != nil {
@@ -369,6 +375,12 @@ func (t *thread) scopes(stackIndex int) []Scope {
 			variablesReference: t.dataVars(),
 		}
 		scopes = append(scopes, dataScope)
+	} else {
+		dataScope := scope{
+			name:           "Data (not provided)",
+			namedVariables: 0,
+		}
+		scopes = append(scopes, dataScope)
 	}
 
 	if rs := t.stack.Result(); rs != nil {