improve tests (#49)

* improve tests Signed-off-by: Flipez <code@brauser.io> * test missing emoji Signed-off-by: Flipez <code@brauser.io> * remove expressionNode and statementNode Signed-off-by: Flipez <code@brauser.io> * improve object/array tests Signed-off-by: Flipez <code@brauser.io> * fix linter warnings Signed-off-by: Flipez <code@brauser.io> * fix tests Signed-off-by: Flipez <code@brauser.io> * add missing error checks * simplify make statements * increase test coverage even more Co-authored-by: Markus Freitag <fmarkus@mailbox.org>
Flipez · Jan 18, 2022 · da0b71e · da0b71e · vercel · Jan 18, 2022
1 parent bc92247
commit da0b71e
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Showing 36 changed files with 231 additions and 57 deletions.
diff --git a/ast/array.go b/ast/array.go
@@ -12,7 +12,6 @@ type Array struct {
 	Elements []Expression
 }
 
-func (al *Array) expressionNode()      {}
 func (al *Array) TokenLiteral() string { return al.Token.Literal }
 func (al *Array) String() string {
 	var out bytes.Buffer

diff --git a/ast/assign.go b/ast/assign.go
@@ -12,8 +12,6 @@ type Assign struct {
 	Value Expression
 }
 
-func (as *Assign) expressionNode()      {}
-func (as *Assign) statementNode()       {}
 func (as *Assign) TokenLiteral() string { return as.Token.Literal }
 func (as *Assign) String() string {
 	var out bytes.Buffer

diff --git a/ast/ast.go b/ast/ast.go
@@ -21,12 +21,10 @@ type Node interface {
 
 type Statement interface {
 	Node
-	statementNode()
 }
 
 type Expression interface {
 	Node
-	expressionNode()
 }
 
 type Program struct {

diff --git a/ast/block.go b/ast/block.go
@@ -11,7 +11,6 @@ type Block struct {
 	Statements []Statement
 }
 
-func (bs *Block) statementNode()       {}
 func (bs *Block) TokenLiteral() string { return bs.Token.Literal }
 func (bs *Block) String() string {
 	var out bytes.Buffer

diff --git a/ast/boolean.go b/ast/boolean.go
@@ -9,6 +9,5 @@ type Boolean struct {
 	Value bool
 }
 
-func (b *Boolean) expressionNode()      {}
 func (b *Boolean) TokenLiteral() string { return b.Token.Literal }
 func (b *Boolean) String() string       { return b.Token.Literal }
diff --git a/ast/call.go b/ast/call.go
@@ -13,7 +13,6 @@ type Call struct {
 	Arguments []Expression
 }
 
-func (ce *Call) expressionNode()      {}
 func (ce *Call) TokenLiteral() string { return ce.Token.Literal }
 func (ce *Call) String() string {
 	var out bytes.Buffer

diff --git a/ast/expression_statement.go b/ast/expression_statement.go
@@ -9,7 +9,6 @@ type ExpressionStatement struct {
 	Expression Expression
 }
 
-func (es *ExpressionStatement) statementNode()       {}
 func (es *ExpressionStatement) TokenLiteral() string { return es.Token.Literal }
 func (es *ExpressionStatement) String() string {
 	if es.Expression != nil {

diff --git a/ast/float.go b/ast/float.go
@@ -9,6 +9,5 @@ type Float struct {
 	Value float64
 }
 
-func (fl *Float) expressionNode()      {}
 func (fl *Float) TokenLiteral() string { return fl.Token.Literal }
 func (fl *Float) String() string       { return fl.Token.Literal }
diff --git a/ast/foreach.go b/ast/foreach.go
@@ -14,7 +14,6 @@ type Foreach struct {
 	Body  *Block
 }
 
-func (fes *Foreach) expressionNode()      {}
 func (fes *Foreach) TokenLiteral() string { return fes.Token.Literal }
 func (fes *Foreach) String() string {
 	var out bytes.Buffer

diff --git a/ast/function.go b/ast/function.go
@@ -14,7 +14,6 @@ type Function struct {
 	Body       *Block
 }
 
-func (fl *Function) expressionNode()      {}
 func (fl *Function) TokenLiteral() string { return fl.Token.Literal }
 func (fl *Function) String() string {
 	var out bytes.Buffer

diff --git a/ast/hash.go b/ast/hash.go
@@ -12,7 +12,6 @@ type Hash struct {
 	Pairs map[Expression]Expression
 }
 
-func (hl *Hash) expressionNode()      {}
 func (hl *Hash) TokenLiteral() string { return hl.Token.Literal }
 func (hl *Hash) String() string {
 	var out bytes.Buffer

diff --git a/ast/identifier.go b/ast/identifier.go
@@ -9,6 +9,5 @@ type Identifier struct {
 	Value string
 }
 
-func (i *Identifier) expressionNode()      {}
 func (i *Identifier) TokenLiteral() string { return i.Token.Literal }
 func (i *Identifier) String() string       { return i.Value }
diff --git a/ast/if.go b/ast/if.go
@@ -13,7 +13,6 @@ type If struct {
 	Alternative *Block
 }
 
-func (ie *If) expressionNode()      {}
 func (ie *If) TokenLiteral() string { return ie.Token.Literal }
 func (ie *If) String() string {
 	var out bytes.Buffer

diff --git a/ast/import.go b/ast/import.go
@@ -12,10 +12,7 @@ type Import struct {
 	Name  Expression
 }
 
-func (ie *Import) expressionNode() {}
-
 func (ie *Import) TokenLiteral() string { return ie.Token.Literal }
-
 func (ie *Import) String() string {
 	var out bytes.Buffer
 

diff --git a/ast/index.go b/ast/index.go
@@ -12,7 +12,6 @@ type Index struct {
 	Index Expression
 }
 
-func (ie *Index) expressionNode()      {}
 func (ie *Index) TokenLiteral() string { return ie.Token.Literal }
 func (ie *Index) String() string {
 	var out bytes.Buffer

diff --git a/ast/infix.go b/ast/infix.go
@@ -13,7 +13,6 @@ type Infix struct {
 	Right    Expression
 }
 
-func (ie *Infix) expressionNode()      {}
 func (ie *Infix) TokenLiteral() string { return ie.Token.Literal }
 func (ie *Infix) String() string {
 	var out bytes.Buffer

diff --git a/ast/integer.go b/ast/integer.go
@@ -9,6 +9,5 @@ type Integer struct {
 	Value int64
 }
 
-func (il *Integer) expressionNode()      {}
 func (il *Integer) TokenLiteral() string { return il.Token.Literal }
 func (il *Integer) String() string       { return il.Token.Literal }
diff --git a/ast/object_call.go b/ast/object_call.go
@@ -12,7 +12,6 @@ type ObjectCall struct {
 	Call   Expression
 }
 
-func (oce *ObjectCall) expressionNode()      {}
 func (oce *ObjectCall) TokenLiteral() string { return oce.Token.Literal }
 func (oce *ObjectCall) String() string {
 	var out bytes.Buffer

diff --git a/ast/prefix.go b/ast/prefix.go
@@ -12,7 +12,6 @@ type Prefix struct {
 	Right    Expression
 }
 
-func (pe *Prefix) expressionNode()      {}
 func (pe *Prefix) TokenLiteral() string { return pe.Token.Literal }
 func (pe *Prefix) String() string {
 	var out bytes.Buffer

diff --git a/ast/return.go b/ast/return.go
@@ -11,7 +11,6 @@ type Return struct {
 	ReturnValue Expression
 }
 
-func (rs *Return) statementNode()       {}
 func (rs *Return) TokenLiteral() string { return rs.Token.Literal }
 func (rs *Return) String() string {
 	var out bytes.Buffer

diff --git a/ast/string.go b/ast/string.go
@@ -9,6 +9,5 @@ type String struct {
 	Value string
 }
 
-func (sl *String) expressionNode()      {}
 func (sl *String) TokenLiteral() string { return sl.Token.Literal }
 func (sl *String) String() string       { return sl.Token.Literal }
diff --git a/evaluator/evaluator_test.go b/evaluator/evaluator_test.go
@@ -29,6 +29,7 @@ func TestEvalIntegerExpression(t *testing.T) {
 		{"3 * 3 * 3 + 10", 37},
 		{"3 * (3 * 3) + 10", 37},
 		{"(5 + 10 * 2 + 15 / 3) * 2 + -10", 50},
+		{"5 ➕ 5 ➕ 5 ➕ 5 - 10", 10},
 	}
 
 	for _, tt := range tests {
@@ -67,6 +68,12 @@ func TestEvalBooleanExpression(t *testing.T) {
 		{"(1 < 2) == false", false},
 		{"(1 > 2) == true", false},
 		{"(1 > 2) == false", true},
+		{"👍", true},
+		{"👎", false},
+		{"👍 == 👍", true},
+		{"👍 == 👎", false},
+		{"👍 != 👎", true},
+		{"👍 != 👍", false},
 	}
 
 	for _, tt := range tests {
@@ -173,6 +180,7 @@ func TestErrorHandling(t *testing.T) {
 		},
 		{`"Hello" - "World"`, "unknown operator: STRING - STRING"},
 		{`{"name": "Monkey"}[def(x) { x }];`, "unusable as hash key: FUNCTION"},
+		{"🔥 != 👍", "identifier not found: IDENT"},
 	}
 
 	for _, tt := range tests {
@@ -535,7 +543,10 @@ func TestImportExpression(t *testing.T) {
 }
 
 func TestImportSearchPaths(t *testing.T) {
-	utilities.AddPath("../stubs")
+	if err := utilities.AddPath("../stubs"); err != nil {
+		t.Errorf("error adding the stubs path: %s", err)
+		return
+	}
 
 	tests := []struct {
 		input    string

diff --git a/object/array.go b/object/array.go
@@ -16,10 +16,8 @@ func NewArray(slice []Object) *Array {
 }
 
 func NewArrayWithObjects(objs ...Object) *Array {
-	slice := make([]Object, len(objs), len(objs))
-	for idx, obj := range objs {
-		slice[idx] = obj
-	}
+	slice := make([]Object, len(objs))
+	copy(slice, objs)
 	return NewArray(slice)
 }
 
@@ -28,7 +26,7 @@ func (ao *Array) Inspect() string {
 	var out bytes.Buffer
 
 	length := len(ao.Elements)
-	elements := make([]string, length, length)
+	elements := make([]string, length)
 	for index, element := range ao.Elements {
 		elements[index] = element.Inspect()
 	}
@@ -81,7 +79,7 @@ func init() {
 				}
 
 				length := len(items)
-				newElements := make([]Object, length, length)
+				newElements := make([]Object, length)
 				var idx int
 				for _, item := range items {
 					newElements[idx] = item
@@ -125,7 +123,7 @@ func init() {
 			method: func(o Object, _ []Object) Object {
 				ao := o.(*Array)
 				if len(ao.Elements) == 0 {
-					return new(Null)
+					return NULL
 				}
 				return ao.Elements[0]
 			},
@@ -140,7 +138,7 @@ func init() {
 			method: func(o Object, _ []Object) Object {
 				ao := o.(*Array)
 				if len(ao.Elements) == 0 {
-					return new(Null)
+					return NULL
 				}
 				return ao.Elements[len(ao.Elements)-1]
 			},
@@ -160,7 +158,7 @@ func init() {
 				ao := o.(*Array)
 				length := len(ao.Elements)
 
-				newElements := make([]Object, length-1, length-1)
+				newElements := make([]Object, length-1)
 				copy(newElements, ao.Elements[:(length-1)])
 
 				returnElement := ao.Elements[length-1]
@@ -188,7 +186,7 @@ func init() {
 				ao := o.(*Array)
 				length := len(ao.Elements)
 
-				newElements := make([]Object, length+1, length+1)
+				newElements := make([]Object, length+1)
 				copy(newElements, ao.Elements)
 				newElements[length] = args[0]
 

diff --git a/object/array_test.go b/object/array_test.go
@@ -6,6 +6,27 @@ import (
 	"github.com/flipez/rocket-lang/object"
 )
 
+func TestNewArrayWithObjects(t *testing.T) {
+	arr := object.NewArrayWithObjects(object.NewString("a"))
+	if v := arr.Type(); v != object.ARRAY_OBJ {
+		t.Errorf("array.Type() return wrong type: %s", v)
+	}
+
+	if v := arr.Elements[0].Type(); v != object.STRING_OBJ {
+		t.Errorf("first array element should be a string object")
+	}
+}
+
+func TestArrayObject(t *testing.T) {
+	tests := []inputTestCase{
+		{"[1] == [1]", true},
+		{"[1] == [true]", false},
+		{"[1] == [true, 1]", false},
+	}
+
+	testInput(t, tests)
+}
+
 func TestArrayObjectMethods(t *testing.T) {
 	tests := []inputTestCase{
 		{`[1,2,3][0]`, 1},
@@ -19,8 +40,16 @@ func TestArrayObjectMethods(t *testing.T) {
 		{`[1,2,3].index(4)`, -1},
 		{`[1,2,3].index(3)`, 2},
 		{`[1,2,3].index(true)`, -1},
-		{`[1,2,3].index()`, "To few arguments: want=1, got=0"},
+		{`[1,2,3].index()`, "to few arguments: want=1, got=0"},
 		{`a = []; b = []; foreach i in a { b.yoink(a[i]) }; a.size()==b.size()`, true},
+		{`[1,1,2].uniq().size()`, 2},
+		{`[true,true,2].uniq().size()`, 2},
+		{`["test","test",2].uniq().size()`, 2},
+		{`["12".reverse!()].uniq()`, "failed because element NULL is not hashable"},
+		{"[].first()", "NULL"},
+		{"[1,2,3].first()", 1},
+		{"[].last()", "NULL"},
+		{"[1,2,3].last()", 3},
 	}
 
 	testInput(t, tests)
@@ -33,3 +62,18 @@ func TestArrayInspect(t *testing.T) {
 		t.Errorf("array.Type() returns wrong type")
 	}
 }
+
+func TestArrayHashKey(t *testing.T) {
+	arr1 := &object.Array{Elements: []object.Object{}}
+	arr2 := &object.Array{Elements: []object.Object{}}
+	diff1 := &object.Array{Elements: []object.Object{&object.String{Value: "Hello World"}}}
+	diff2 := &object.Array{Elements: []object.Object{&object.String{Value: "Hello Another World"}}}
+
+	if arr1.HashKey() != arr2.HashKey() {
+		t.Errorf("arrays with same content have different hash keys")
+	}
+
+	if diff1.HashKey() == diff2.HashKey() {
+		t.Errorf("arrays with different content have same hash keys")
+	}
+}
diff --git a/object/boolean_test.go b/object/boolean_test.go
@@ -34,6 +34,8 @@ func TestBooleanObjectMethods(t *testing.T) {
 
 		// other
 		{"(true.wat().lines().size() == true.methods().size() + 1).plz_s()", "true"},
+		{"true == true", true},
+		{"true == false", false},
 	}
 
 	testInput(t, tests)

diff --git a/object/builtin_test.go b/object/builtin_test.go
@@ -0,0 +1,30 @@
+package object_test
+
+import (
+	"testing"
+
+	"github.com/flipez/rocket-lang/object"
+)
+
+func TestBuiltinObjectMethods(t *testing.T) {
+	tests := []inputTestCase{
+		{`puts.nope()`, "Failed to invoke method: nope"},
+	}
+
+	testInput(t, tests)
+}
+
+func TestBuiltinType(t *testing.T) {
+	tests := []inputTestCase{
+		{"puts", "builtin function"},
+	}
+
+	for _, tt := range tests {
+		def := testEval(tt.input).(*object.Builtin)
+		defInspect := def.Inspect()
+
+		if defInspect != tt.expected {
+			t.Errorf("wrong string. expected=%#v, got=%#v", tt.expected, defInspect)
+		}
+	}
+}