Add tons of builtin helpers and array operations.

vm/vm_test.go

@@ -354,6 +354,16 @@ func TestArrayDuplication(t *testing.T) {
 	runVmTests(t, tests)
 }
 
+func TestArrayMerging(t *testing.T) {
+	tests := []vmTestCase{
+		{"[] + [1]", []int{1}},
+		{"[1] + [2]", []int{1, 2}},
+		{"[1, 2] + [3, 4]", []int{1, 2, 3, 4}},
+	}
+
+	runVmTests(t, tests)
+}
+
 func TestHashLiterals(t *testing.T) {
 	tests := []vmTestCase{
 		{
@@ -378,6 +388,26 @@ func TestHashLiterals(t *testing.T) {
 	runVmTests(t, tests)
 }
 
+func TestHashMerging(t *testing.T) {
+	tests := []vmTestCase{
+		{
+			`{} + {"a": 1}`,
+			map[object.HashKey]int64{
+				(&object.String{Value: "a"}).HashKey(): 1,
+			},
+		},
+		{
+			`{"a": 1} + {"b": 2}`,
+			map[object.HashKey]int64{
+				(&object.String{Value: "a"}).HashKey(): 1,
+				(&object.String{Value: "b"}).HashKey(): 2,
+			},
+		},
+	}
+
+	runVmTests(t, tests)
+}
+
 func TestSelectorExpressions(t *testing.T) {
 	tests := []vmTestCase{
 		{`{"foo": 5}.foo`, 5},
@@ -677,7 +707,7 @@ func TestBuiltinFunctions(t *testing.T) {
 		{
 			`len(1)`,
 			&object.Error{
-				Message: "argument to `len` not supported, got INTEGER",
+				Message: "argument to `len` not supported, got int",
 			},
 		},
 		{`len("one", "two")`,
@@ -692,14 +722,14 @@ func TestBuiltinFunctions(t *testing.T) {
 		{`first([])`, Null},
 		{`first(1)`,
 			&object.Error{
-				Message: "argument to `first` must be ARRAY, got INTEGER",
+				Message: "argument to `first` must be array, got int",
 			},
 		},
 		{`last([1, 2, 3])`, 3},
 		{`last([])`, Null},
 		{`last(1)`,
 			&object.Error{
-				Message: "argument to `last` must be ARRAY, got INTEGER",
+				Message: "argument to `last` must be array, got int",
 			},
 		},
 		{`rest([1, 2, 3])`, []int{2, 3}},
@@ -707,7 +737,7 @@ func TestBuiltinFunctions(t *testing.T) {
 		{`push([], 1)`, []int{1}},
 		{`push(1, 1)`,
 			&object.Error{
-				Message: "argument to `push` must be ARRAY, got INTEGER",
+				Message: "argument to `push` must be array, got int",
 			},
 		},
 		{`input()`, ""},