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|
package provider
import (
"testing"
)
type stubFnChecker struct {
names map[string]bool
}
func (s *stubFnChecker) IsFunctionName(name string) bool {
return s.names[name]
}
func newTestSemanticProvider() *semanticTokensProvider {
return &semanticTokensProvider{
fnChecker: &stubFnChecker{names: map[string]bool{
"Sprintf": true,
"len": true,
}},
}
}
func decodeTokens(data []int) []SemanticToken {
var tokens []SemanticToken
prevLine := 0
prevChar := 0
for i := 0; i+4 < len(data); i += 5 {
deltaLine := data[i]
deltaChar := data[i+1]
length := data[i+2]
tokenType := data[i+3]
modifiers := data[i+4]
line := prevLine + deltaLine
startChar := deltaChar
if deltaLine == 0 {
startChar = prevChar + deltaChar
}
tokens = append(tokens, SemanticToken{
Line: line,
StartChar: startChar,
Length: length,
TokenType: tokenType,
Modifiers: modifiers,
})
prevLine = line
prevChar = startChar
}
return tokens
}
func countByType(tokens []SemanticToken, tokenType int) int {
count := 0
for _, t := range tokens {
if t.TokenType == tokenType {
count++
}
}
return count
}
func hasTokenAt(tokens []SemanticToken, line, col, length, tokenType int) bool {
for _, tok := range tokens {
if tok.Line == line && tok.StartChar == col && tok.Length == length && tok.TokenType == tokenType {
return true
}
}
return false
}
func TestSemanticTokens_ComponentDecl(t *testing.T) {
type tc struct {
content string
wantKeyword bool
wantClassName bool
wantParams int
}
tests := map[string]tc{
"simple component": {
content: `package main
templ Hello() {
<span>Hello</span>
}
`,
wantKeyword: true,
wantClassName: true,
wantParams: 0,
},
"component with params": {
content: `package main
templ Greeting(name string, count int) {
<span>{name}</span>
}
`,
wantKeyword: true,
wantClassName: true,
wantParams: 2,
},
}
sp := newTestSemanticProvider()
for name, tt := range tests {
t.Run(name, func(t *testing.T) {
doc := parseTestDoc(tt.content)
result, err := sp.SemanticTokensFull(doc)
if err != nil {
t.Fatalf("unexpected error: %v", err)
}
tokens := decodeTokens(result.Data)
keywordCount := countByType(tokens, TokenTypeKeyword)
if tt.wantKeyword && keywordCount == 0 {
t.Error("expected at least one keyword token (templ)")
}
classCount := countByType(tokens, TokenTypeClass)
if tt.wantClassName && classCount == 0 {
t.Error("expected at least one class token (component name)")
}
paramCount := countByType(tokens, TokenTypeParameter)
if paramCount < tt.wantParams {
t.Errorf("got %d parameter tokens, want at least %d", paramCount, tt.wantParams)
}
})
}
t.Run("simple component positions", func(t *testing.T) {
doc := parseTestDoc(tests["simple component"].content)
result, err := sp.SemanticTokensFull(doc)
if err != nil {
t.Fatalf("unexpected error: %v", err)
}
tokens := decodeTokens(result.Data)
if !hasTokenAt(tokens, 2, 0, 5, TokenTypeKeyword) {
t.Error("expected templ keyword token at 2:0 with length 5")
}
if !hasTokenAt(tokens, 2, 6, 5, TokenTypeClass) {
t.Error("expected Hello class token at 2:6 with length 5")
}
})
t.Run("component with params positions", func(t *testing.T) {
doc := parseTestDoc(tests["component with params"].content)
result, err := sp.SemanticTokensFull(doc)
if err != nil {
t.Fatalf("unexpected error: %v", err)
}
tokens := decodeTokens(result.Data)
if !hasTokenAt(tokens, 2, 0, 5, TokenTypeKeyword) {
t.Error("expected templ keyword token at 2:0 with length 5")
}
if !hasTokenAt(tokens, 2, 6, 8, TokenTypeClass) {
t.Error("expected Greeting class token at 2:6 with length 8")
}
})
}
func TestSemanticTokens_FunctionDecl(t *testing.T) {
type tc struct {
content string
wantFunc bool
}
tests := map[string]tc{
"helper function": {
content: `package main
func helper(s string) string {
return s
}
`,
wantFunc: true,
},
}
sp := newTestSemanticProvider()
for name, tt := range tests {
t.Run(name, func(t *testing.T) {
doc := parseTestDoc(tt.content)
result, err := sp.SemanticTokensFull(doc)
if err != nil {
t.Fatalf("unexpected error: %v", err)
}
tokens := decodeTokens(result.Data)
funcCount := countByType(tokens, TokenTypeFunction)
if tt.wantFunc && funcCount == 0 {
t.Error("expected at least one function token")
}
})
}
}
func TestSemanticTokens_Keywords(t *testing.T) {
type tc struct {
content string
wantKeyword int
}
tests := map[string]tc{
"for loop keyword": {
content: `package main
templ List(items []string) {
for _, item := range items {
<span>{item}</span>
}
}
`,
wantKeyword: 2,
},
"if/else keywords": {
content: `package main
templ Cond(show bool) {
if show {
<span>Yes</span>
} else {
<span>No</span>
}
}
`,
wantKeyword: 2,
},
}
sp := newTestSemanticProvider()
for name, tt := range tests {
t.Run(name, func(t *testing.T) {
doc := parseTestDoc(tt.content)
result, err := sp.SemanticTokensFull(doc)
if err != nil {
t.Fatalf("unexpected error: %v", err)
}
tokens := decodeTokens(result.Data)
keywordCount := countByType(tokens, TokenTypeKeyword)
if keywordCount < tt.wantKeyword {
t.Errorf("got %d keyword tokens, want at least %d", keywordCount, tt.wantKeyword)
}
})
}
t.Run("for loop keyword positions", func(t *testing.T) {
doc := parseTestDoc(tests["for loop keyword"].content)
result, err := sp.SemanticTokensFull(doc)
if err != nil {
t.Fatalf("unexpected error: %v", err)
}
tokens := decodeTokens(result.Data)
if !hasTokenAt(tokens, 2, 0, 5, TokenTypeKeyword) {
t.Error("expected templ keyword at 2:0 with length 5")
}
if !hasTokenAt(tokens, 3, 1, 3, TokenTypeKeyword) {
t.Error("expected for keyword at 3:1 with length 3")
}
})
t.Run("if/else keyword positions", func(t *testing.T) {
doc := parseTestDoc(tests["if/else keywords"].content)
spWithDocs := &semanticTokensProvider{
fnChecker: &stubFnChecker{names: map[string]bool{}},
docs: &stubDocAccessor{docs: []*Document{doc}},
}
result, err := spWithDocs.SemanticTokensFull(doc)
if err != nil {
t.Fatalf("unexpected error: %v", err)
}
tokens := decodeTokens(result.Data)
if !hasTokenAt(tokens, 2, 0, 5, TokenTypeKeyword) {
t.Error("expected templ keyword at 2:0 with length 5")
}
if !hasTokenAt(tokens, 3, 1, 2, TokenTypeKeyword) {
t.Error("expected if keyword at 3:1 with length 2")
}
if !hasTokenAt(tokens, 5, 3, 4, TokenTypeKeyword) {
t.Error("expected else keyword at 5:3 with length 4")
}
})
t.Run("else inside string not matched", func(t *testing.T) {
content := `package main
import "fmt"
templ Cond(show bool) {
if show {
<span>{fmt.Sprintf("something else happened")}</span>
} else {
<span>fallback</span>
}
}
`
doc := parseTestDoc(content)
spWithDocs := &semanticTokensProvider{
fnChecker: &stubFnChecker{names: map[string]bool{}},
docs: &stubDocAccessor{docs: []*Document{doc}},
}
result, err := spWithDocs.SemanticTokensFull(doc)
if err != nil {
t.Fatalf("unexpected error: %v", err)
}
tokens := decodeTokens(result.Data)
if !hasTokenAt(tokens, 7, 3, 4, TokenTypeKeyword) {
t.Error("expected else keyword at 7:3 with length 4")
}
if hasTokenAt(tokens, 6, 30, 4, TokenTypeKeyword) || hasTokenAt(tokens, 6, 31, 4, TokenTypeKeyword) || hasTokenAt(tokens, 6, 32, 4, TokenTypeKeyword) {
t.Error("false-positive: keyword token found at the 'else' position inside string literal on line 6")
}
})
t.Run("bare else keyword highlighted", func(t *testing.T) {
content := `package main
templ Cond(show bool) {
if show {
<span>Yes</span>
} else {
<span>No</span>
}
}
`
doc := parseTestDoc(content)
spWithDocs := &semanticTokensProvider{
fnChecker: &stubFnChecker{names: map[string]bool{}},
docs: &stubDocAccessor{docs: []*Document{doc}},
}
result, err := spWithDocs.SemanticTokensFull(doc)
if err != nil {
t.Fatalf("unexpected error: %v", err)
}
tokens := decodeTokens(result.Data)
if !hasTokenAt(tokens, 5, 3, 4, TokenTypeKeyword) {
t.Error("expected else keyword at 5:3 with length 4 for bare else syntax")
}
})
}
func TestSemanticTokens_ElementAttributes(t *testing.T) {
type tc struct {
content string
wantAttr int
}
tests := map[string]tc{
"element with attributes": {
content: `package main
templ Hello() {
<div class="border-single" id="main">
<span>Hello</span>
</div>
}
`,
wantAttr: 2,
},
}
sp := newTestSemanticProvider()
for name, tt := range tests {
t.Run(name, func(t *testing.T) {
doc := parseTestDoc(tt.content)
result, err := sp.SemanticTokensFull(doc)
if err != nil {
t.Fatalf("unexpected error: %v", err)
}
tokens := decodeTokens(result.Data)
funcCount := countByType(tokens, TokenTypeFunction)
if funcCount < tt.wantAttr {
t.Errorf("got %d function/attribute tokens, want at least %d", funcCount, tt.wantAttr)
}
})
}
}
func TestSemanticTokens_Comments(t *testing.T) {
type tc struct {
content string
wantComment int
}
tests := map[string]tc{
"line comment": {
content: `package main
// A comment
templ Hello() {
<span>Hello</span>
}
`,
wantComment: 1,
},
"block comment": {
content: `package main
/* Block comment */
templ Hello() {
<span>Hello</span>
}
`,
wantComment: 1,
},
"comment inside component": {
content: `package main
templ Hello() {
// inner comment
<span>Hello</span>
}
`,
wantComment: 1,
},
}
sp := newTestSemanticProvider()
for name, tt := range tests {
t.Run(name, func(t *testing.T) {
doc := parseTestDoc(tt.content)
result, err := sp.SemanticTokensFull(doc)
if err != nil {
t.Fatalf("unexpected error: %v", err)
}
tokens := decodeTokens(result.Data)
commentCount := countByType(tokens, TokenTypeComment)
if commentCount < tt.wantComment {
t.Errorf("got %d comment tokens, want at least %d", commentCount, tt.wantComment)
}
})
}
}
|